{"schemaVersion":2,"manufacturerCadDirectory":{"count":6095,"url":"https://eloragrid.ai/library/manufacturer-cad","json":"https://eloragrid.ai/library/manufacturer-cad.json","scope":"File listings and source links; not verified product or symbol counts"},"publisher":"Elora Grid","updatedOn":"2026-10-14","scope":"Independently authored explanations and original educational illustrations, supported by public references. Not a standards database replica or engineering approval.","originalArtworkLicense":"https://creativecommons.org/licenses/by/4.0/","thirdPartyMaterials":"Referenced by link only; no rights to third-party material are granted.","entries":[{"slug":"current-transformer","name":"Current transformer","kind":"symbol","abbreviation":"CT","aliases":["current transducer","instrument transformer current","HXF1CT","VXF1CT"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A current-measurement transformer used with metering and protection equipment.","description":["A current transformer produces a secondary current related to the current in its primary conductor. A drawing uses the CT representation to show where current is measured and which metering or protection circuit receives that measurement. It does not, by itself, specify the CT ratio, accuracy class, burden or secondary connection.","On a single line diagram, the CT is placed at the measurement location. A schematic expands the secondary wiring, terminals and connected devices. Multi-core and multi-secondary CT arrangements require additional information; one generic preview cannot describe every configuration."],"readingNotes":["Follow the primary conductor through the CT and then identify the secondary circuit separately.","Polarity marks and terminal labels belong to the selected device and its documented connections."],"drawingChecklist":["Identify the metering or protection purpose.","Reference the ratio, class and burden in the equipment documentation.","Cross-reference secondary terminals and any test facility."],"distinction":"A CT measures current. A VT measures voltage. Their secondary circuits and isolation/testing arrangements are different.","facts":[{"label":"Quantity represented","value":"Current"},{"label":"Information to document","value":"Ratio, class, burden and polarity"},{"label":"Exact standard graphic","value":"Consult the applicable standard and drawing legend"},{"label":"Public Autodesk reference names","value":"HXF1CT, VXF1CT (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-ct","relevance":"Public CT symbol categories and secondary-winding variants."},{"sourceId":"instrument-transformers","relevance":"Manufacturer examples of current and voltage transformers."},{"sourceId":"ct-terminals","relevance":"Manufacturer reference for CT test-terminal arrangements."}],"related":["voltage-transformer","ct-test-terminal","50-instantaneous-overcurrent","51-time-overcurrent"],"artwork":"ct","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/current-transformer","illustration":"https://eloragrid.ai/library/illustrations/current-transformer.svg"},{"slug":"voltage-transformer","name":"Voltage transformer","kind":"symbol","abbreviation":"VT / PT","aliases":["potential transformer","PT","voltage instrument transformer","HXF1PT","VXF1PT"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A transformer providing a voltage signal for metering or protection.","description":["A voltage transformer provides a secondary voltage related to the voltage on its primary winding. VT and PT, for potential transformer, are common terms encountered in power drawings. Its representation identifies a measurement function; winding connections, fuses, earthing and secondary circuits need their own documented detail.","A single line diagram places the VT at the system connection being measured. The associated schematic shows how that voltage reaches a meter, relay or control system. A power transformer can look similar in a simplified drawing, so the label and context matter."],"readingNotes":["Check the measured voltage connection and the number of windings or secondaries shown.","Read polarity, ratio and secondary earthing from the specified device documentation."],"drawingChecklist":["Identify the measured bus or feeder.","Record the specified ratio and accuracy information.","Cross-reference primary and secondary protection and terminals."],"distinction":"A VT supplies a voltage measurement; a power transformer supplies a power circuit. A shared transformer-like outline does not make their functions interchangeable.","facts":[{"label":"Quantity represented","value":"Voltage"},{"label":"Alternative term","value":"Potential transformer"},{"label":"Device data","value":"Model-specific winding and terminal information"},{"label":"Public Autodesk reference names","value":"HXF1PT, VXF1PT (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-transformers","relevance":"Public potential- and voltage-transformer categories."},{"sourceId":"instrument-transformers","relevance":"Manufacturer instrument-transformer information."}],"related":["current-transformer","power-transformer","27-undervoltage","59-overvoltage"],"artwork":"vt","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/voltage-transformer","illustration":"https://eloragrid.ai/library/illustrations/voltage-transformer.svg"},{"slug":"circuit-breaker","name":"Circuit breaker","kind":"symbol","abbreviation":"CB","aliases":["breaker","ACB","MCCB","MCB","air circuit breaker","moulded case circuit breaker","molded case circuit breaker","miniature circuit breaker","HCB1","VCB1"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A switching device that can interrupt a circuit, with specified fault-interruption capability.","description":["A circuit-breaker representation identifies a device capable of interrupting its circuit under the operating conditions for which it is rated. The drawing should connect that device to its equipment identification, protection arrangement and control information. The graphical mark alone does not establish the current rating, breaking capacity or trip settings.","Breaker representations vary between drawing conventions and may include qualifiers for operating mechanism or protection. An SLD gives system position and major connections. A control schematic expands the close, trip, indication and auxiliary-contact circuits."],"readingNotes":["Read device state according to the drawing legend, rather than assuming every open-looking mark means equipment is currently open.","Keep the equipment tag, graphical symbol and ANSI device-function number 52 distinct."],"drawingChecklist":["Reference the voltage, current and breaking-capacity data.","Identify poles and the applicable protection arrangement.","Link the control circuit and auxiliary contacts."],"distinction":"A disconnector provides isolation; it is not automatically a fault-interrupting circuit breaker. Check published device capabilities.","facts":[{"label":"Related function number","value":"52 for an AC circuit breaker"},{"label":"Device specification","value":"Voltage, current, interruption and trip information"},{"label":"Preview","value":"Generic educational representation"},{"label":"Public Autodesk reference names","value":"HCB1, VCB1 (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-breakers","relevance":"Public breaker categories and qualifying features."},{"sourceId":"breaker-characteristics","relevance":"Manufacturer explanation of circuit-breaker characteristics."},{"sourceId":"device-numbers","relevance":"Public reference for device-function number 52."}],"related":["disconnector","load-break-switch","52-ac-circuit-breaker","normally-open-contact"],"artwork":"breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/circuit-breaker.svg"},{"slug":"disconnector","name":"Disconnector","kind":"symbol","abbreviation":"Isolator","aliases":["isolation switch","isolator switch","disconnect switch"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A switching device providing an electrical isolation function.","description":["A disconnector, often called an isolator, provides an isolation function in an electrical circuit. Its representation should be read with the drawing legend and the selected device specification. Do not infer load-breaking or fault-interruption capability simply because a drawing contains a switch-like mark.","In a switchgear SLD the disconnector may appear next to a breaker, earthing switch or bus section. Control drawings can also show position indications and interlocking. The main-circuit representation and the auxiliary indications describe different parts of the equipment."],"readingNotes":["Identify which circuit segment is isolated by the device.","Distinguish the main switching function from its auxiliary position contacts."],"drawingChecklist":["Link the selected device and its isolation capability.","Reference the position indication and interlock documentation.","Show associated earthing arrangements where applicable."],"distinction":"A load-break switch has a specified load-switching capability. A disconnector designation alone does not establish that capability.","facts":[{"label":"Primary role","value":"Isolation"},{"label":"Capability","value":"Confirm against the selected device"},{"label":"Related device number","value":"89: line switch, where the convention applies"}],"references":[{"sourceId":"switching-devices","relevance":"Manufacturer explanation of disconnector and load-breaking functions."},{"sourceId":"abb-switchgear","relevance":"Public secondary-distribution switchgear context."}],"related":["load-break-switch","circuit-breaker","earthing-switch","89-line-switch"],"artwork":"isolator","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/disconnector","illustration":"https://eloragrid.ai/library/illustrations/disconnector.svg"},{"slug":"load-break-switch","name":"Load-break switch","kind":"symbol","abbreviation":"LBS","aliases":["load breaking switch","switch disconnector","switch-disconnector"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A switch with a specified capability to make and break normal load current.","description":["A load-break switch operates a loaded circuit under the normal conditions covered by its rating. It should not be confused with a circuit breaker, whose specified duties can include interrupting fault current. Some products combine switching and isolation, and some are used with fuses for a protection arrangement.","The SLD shows where the switch connects the circuit. Its schedule or manufacturer reference establishes the duty and capabilities. The device name, qualifiers and associated protective equipment explain more than the generic mark alone."],"readingNotes":["Look for a separately identified fuse or breaker in the protection path.","Check whether isolation is an additional specified function of the chosen product."],"drawingChecklist":["Reference the load-switching capability.","Identify any associated protection device.","Record the product type and operating arrangement."],"distinction":"Fault-making, load-breaking and fault-breaking are different capabilities. Avoid using a single switch label as a substitute for the equipment specification.","facts":[{"label":"Primary role","value":"Normal-load switching"},{"label":"Protection","value":"May rely on separate protective devices"},{"label":"Combined duties","value":"Product-specific"}],"references":[{"sourceId":"switching-devices","relevance":"Public explanation of load-break switches and their relationship to protection."}],"related":["disconnector","circuit-breaker","fuse","ring-main-unit"],"artwork":"load-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/load-break-switch","illustration":"https://eloragrid.ai/library/illustrations/load-break-switch.svg"},{"slug":"earthing-switch","name":"Earthing switch","kind":"symbol","abbreviation":"ES","aliases":["grounding switch","earth switch","ground switch"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A switch used to connect an identified circuit section to earth.","description":["An earthing-switch representation identifies a switching connection between an electrical circuit section and earth. This is a switching device, not merely an earth-reference mark. On an SLD, its location helps explain which part of the switchgear or circuit is connected to earth when the device operates.","Switchgear documentation can include earthing-switch position indications and interlocks with other devices. Those relationships need to be shown or referenced separately. The generic concept here does not establish operating sequence, duty, interlock logic or permission to operate equipment."],"readingNotes":["Identify the circuit section and earth connection on either side of the switching element.","Follow interlock and position references in the equipment documentation."],"drawingChecklist":["Identify the associated panel or circuit.","Reference the specified device duty.","Cross-reference interlocks and position indication."],"distinction":"A protective-earth mark identifies a connection or function. An earthing switch identifies equipment that makes a switching connection.","facts":[{"label":"Primary role","value":"Switching connection to earth"},{"label":"Operating arrangement","value":"Specified by equipment documentation"},{"label":"Graphic scope","value":"Concept illustration"}],"references":[{"sourceId":"abb-functions","relevance":"Public earthing-switch control and indication functions."},{"sourceId":"abb-switchgear","relevance":"Manufacturer switchgear equipment context."}],"related":["protective-earth","disconnector","switchgear-panel","ring-main-unit"],"artwork":"earth-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/earthing-switch","illustration":"https://eloragrid.ai/library/illustrations/earthing-switch.svg"},{"slug":"fuse","name":"Fuse","kind":"symbol","abbreviation":"FU","aliases":["fuse link","fuse-link","fused protection","HFU1","VFU1"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"An overcurrent protective element that interrupts a circuit by melting its fuse link.","description":["A fuse representation identifies a protective fuse link in a circuit. Its rating and operating characteristics are additional information: a generic fuse mark does not specify utilization category, current, voltage, breaking capacity or coordination with other protective equipment.","Fuses appear in main power circuits, transformer circuits and control supplies. Some assemblies add indication or auxiliary contacts. A drawing should distinguish the protective link from the holder, disconnect mechanism and any indication function."],"readingNotes":["Follow the protected circuit and identify how many fuse links are represented.","Treat associated indication contacts as separate schematic elements."],"drawingChecklist":["Reference the fuse type and rating.","Identify the holder or fuse-switch assembly when relevant.","Keep auxiliary indication and replacement information linked."],"distinction":"A fuse and a fused disconnector may share protective components, but the assembly also includes a switching or isolation function.","facts":[{"label":"Primary role","value":"Overcurrent protection"},{"label":"Selection data","value":"Type, voltage, current and breaking capacity"},{"label":"Assembly details","value":"Holder and switching functions are separate"},{"label":"Public Autodesk reference names","value":"HFU1, VFU1 (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-fuses","relevance":"Public fuse, auxiliary-contact and indication categories."},{"sourceId":"switching-devices","relevance":"Manufacturer explanation of fuse categories."}],"related":["circuit-breaker","load-break-switch","terminal","voltage-transformer"],"artwork":"fuse","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/fuse","illustration":"https://eloragrid.ai/library/illustrations/fuse.svg"},{"slug":"busbar","name":"Busbar","kind":"symbol","abbreviation":"Bus","aliases":["bus bar","bus section","bus connection"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A common conductive connection distributing power to connected circuits.","description":["A busbar connects multiple power circuits to a common electrical node. In an SLD it is commonly represented as a line with feeder connections. The representation describes connectivity; physical conductor dimensions, enclosure, phase arrangement and current-carrying capabilities are separate equipment information.","Bus sections and bus couplers describe how those electrical nodes can be connected or separated. Keep bus labels consistent between the system drawing, switchboard schedule and equipment documentation. A drawing line is not a scale representation of a physical busbar."],"readingNotes":["Identify each feeder connected to the same bus section.","Use device positions to determine which sections are shown as connected in the stated drawing condition."],"drawingChecklist":["Name each bus or bus section.","Reference ratings and fault-duty information.","Cross-reference any coupler or section device."],"distinction":"A busbar is an electrical connection. Busbar trunking is a physical distribution system with model-specific enclosures and fittings.","facts":[{"label":"Drawing meaning","value":"Shared electrical node"},{"label":"Physical dimensions","value":"Separate from the SLD mark"},{"label":"Related equipment","value":"Busbar trunking and switchboard assemblies"}],"references":[{"sourceId":"autodesk-index","relevance":"Public bus-tap and power-distribution drawing categories."},{"sourceId":"busbar-trunking","relevance":"Manufacturer example of a physical busbar distribution system."}],"related":["circuit-breaker","busbar-trunking","switchboard","power-transformer"],"artwork":"busbar","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/busbar","illustration":"https://eloragrid.ai/library/illustrations/busbar.svg"},{"slug":"normally-open-contact","name":"Normally open contact","kind":"symbol","abbreviation":"NO","aliases":["make contact","NO contact","open contact","HCR21","VCR21"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A contact shown open in the normal state defined for its device.","description":["A normally open contact is open in the normal state defined for the device. Operating its relay, pushbutton or other parent device may close the contact. The meaning of normal must be established from the drawing convention and equipment documentation; it is not necessarily the current live condition of the installation.","A schematic usually identifies the parent device and the relevant terminals. Several contact representations can belong to one relay or contactor. Cross-references connect those representations to their coil or parent equipment."],"readingNotes":["Read the parent device identifier before interpreting the contact function.","Check the terminal identifiers and the state convention in the drawing legend."],"drawingChecklist":["Identify the parent coil or actuator.","Use the documented terminal designation.","Cross-reference other contacts belonging to the same device."],"distinction":"Normally open describes the stated normal condition. A position indication or operating snapshot may use a different state convention.","facts":[{"label":"Normal state","value":"Open, as defined for the parent device"},{"label":"Terminal designation","value":"Manufacturer-specific"},{"label":"Parent relationship","value":"Coil, actuator or equipment cross-reference"},{"label":"Public Autodesk reference names","value":"HCR21, VCR21 (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public normally open relay contact categories."}],"related":["normally-closed-contact","changeover-contact","relay-coil","pushbutton-no"],"artwork":"contact-no","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/normally-open-contact","illustration":"https://eloragrid.ai/library/illustrations/normally-open-contact.svg"},{"slug":"normally-closed-contact","name":"Normally closed contact","kind":"symbol","abbreviation":"NC","aliases":["break contact","NC contact","closed contact","HCR22","VCR22"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A contact shown closed in the normal state defined for its device.","description":["A normally closed contact is closed in the normal state specified for its device. Actuating the parent device may open it. The drawing must establish that state convention and associate the contact with the appropriate equipment and terminal designations.","NC contacts occur in relay logic, indication and control circuits. The contact representation alone does not establish safety behaviour, failure response or suitability for a safety function. Those properties depend on the complete device and system design."],"readingNotes":["Follow the parent-device reference and the relevant circuit path.","Check whether the drawing describes a de-energised, unactuated or explicitly stated operating state."],"drawingChecklist":["Reference the parent device.","Document the contact terminals.","Explain any state convention that differs from the general legend."],"distinction":"An NC mark does not prove a circuit is fail-safe or establish positive-opening characteristics. Consult the selected device and complete control design.","facts":[{"label":"Normal state","value":"Closed, as defined for the parent device"},{"label":"Safety characteristics","value":"Not established by the generic symbol"},{"label":"Device association","value":"Parent identifier and terminals"},{"label":"Public Autodesk reference names","value":"HCR22, VCR22 (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public normally closed relay contact categories."}],"related":["normally-open-contact","changeover-contact","relay-coil","emergency-stop"],"artwork":"contact-nc","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/normally-closed-contact","illustration":"https://eloragrid.ai/library/illustrations/normally-closed-contact.svg"},{"slug":"changeover-contact","name":"Changeover contact","kind":"symbol","abbreviation":"CO","aliases":["Form C","SPDT","single pole double throw","transfer contact","HCR23R","VCR23R"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A contact arrangement switching a common connection between two contact paths.","description":["A changeover contact connects a common terminal to one of two alternative contact paths according to its operating state. Form C and SPDT are terms commonly encountered for this arrangement. The actual terminal numbering and transfer behaviour come from the selected device.","The schematic should make the common terminal and normal state clear. A mirrored or differently oriented drawing can retain the same logical arrangement, but terminal associations must not be inferred from appearance alone."],"readingNotes":["Locate the common terminal and determine the path shown in the defined normal state.","Use device data to identify transfer timing and any special overlap behaviour."],"drawingChecklist":["Identify the common terminal.","Link both switched paths to the parent device.","Keep terminal identifiers consistent with wiring documentation."],"distinction":"Two unrelated NO/NC contacts are not automatically one changeover contact. Confirm whether they share a common connection and operating mechanism.","facts":[{"label":"Connections","value":"Common and two alternative paths"},{"label":"Alternative terms","value":"Form C; SPDT"},{"label":"Transfer characteristics","value":"Device-specific"},{"label":"Public Autodesk reference names","value":"HCR23R, VCR23R (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public Form C relay contact variants."}],"related":["normally-open-contact","normally-closed-contact","selector-switch","relay-coil"],"artwork":"changeover","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/changeover-contact","illustration":"https://eloragrid.ai/library/illustrations/changeover-contact.svg"},{"slug":"relay-coil","name":"Relay coil","kind":"symbol","abbreviation":"Coil","aliases":["control relay","relay operating coil","solenoid coil","HCR1","VCR1"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"The operating element associated with a relay and its separately drawn contacts.","description":["A relay coil represents an operating element that changes the state of associated contacts when the device operates. Coil and contact representations are often drawn in different locations to make the circuit easier to read. Their shared identifier and cross-references establish the relationship.","The coil representation does not determine whether its supply is AC or DC, its voltage, polarity, suppression or operating duty. Those details belong to the device specification and schematic annotations. Latching and other special operating modes need explicit identification."],"readingNotes":["Find the device tag and follow references to its contacts.","Read supply and polarity information from the specified coil, not from an unqualified rectangle."],"drawingChecklist":["Reference coil supply requirements.","Identify suppression or polarity features if fitted.","Cross-reference all associated contacts."],"distinction":"A relay coil is not a contactor power pole. Similar operating-element marks can represent equipment with different switching duties.","facts":[{"label":"Device relationship","value":"Parent operating element"},{"label":"Supply","value":"Selected coil specification"},{"label":"Variants","value":"Latching, polarized and other device types"},{"label":"Public Autodesk reference names","value":"HCR1, VCR1 (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public relay-coil, latching and polarized variants."}],"related":["normally-open-contact","normally-closed-contact","contactor","selector-switch"],"artwork":"coil","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/relay-coil","illustration":"https://eloragrid.ai/library/illustrations/relay-coil.svg"},{"slug":"contactor","name":"Contactor","kind":"symbol","abbreviation":"KM","aliases":["motor contactor","power contactor"],"category":"control-circuits","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"An electrically operated switching device commonly used for repeated switching duties.","description":["A contactor uses an operating mechanism to switch its main contacts and may include auxiliary contacts for control or indication. On a power drawing it represents the main switching path; on a schematic its coil and contacts may be distributed and connected by identifiers.","Its ability to switch a particular load depends on the selected device and utilization category. Overload or short-circuit protection can be provided by other devices in the arrangement. Do not treat the generic contactor representation as a complete protective device."],"readingNotes":["Distinguish main power poles from auxiliary control contacts.","Use the common equipment identifier to connect the power and control drawings."],"drawingChecklist":["Reference the load duty and contactor specification.","Show the coil supply and associated contacts.","Identify separate protective equipment where applicable."],"distinction":"A contactor and circuit breaker have different duties. Adding an overload relay does not make every contactor assembly equivalent to a circuit breaker.","facts":[{"label":"Main role","value":"Repeated electrical switching"},{"label":"Tag example","value":"KM is a convention, not a universal requirement"},{"label":"Protection","value":"Confirm the complete arrangement"}],"references":[{"sourceId":"switching-devices","relevance":"Manufacturer description of contactors and associated protection."},{"sourceId":"autodesk-contacts","relevance":"Public operating-coil and contact representations."}],"related":["relay-coil","motor","circuit-breaker","normally-open-contact"],"artwork":"contactor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/contactor","illustration":"https://eloragrid.ai/library/illustrations/contactor.svg"},{"slug":"pushbutton-no","name":"Normally open pushbutton","kind":"symbol","abbreviation":"PB NO","aliases":["start pushbutton","NO push button","momentary make pushbutton","HPB11","VPB11"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A pushbutton contact normally shown open before actuation.","description":["A normally open pushbutton combines an operator-actuated mechanism with a contact shown open in its defined normal state. Momentary and maintained or latching operation are separate characteristics that must be described explicitly.","Control schematics should identify both the contact function and the operator-facing purpose. A start label is a circuit-specific use, not an intrinsic property of every NO pushbutton. Multiple contact blocks can belong to a single actuator."],"readingNotes":["Read the actuator description and contact-block association.","Check whether the operating mode is momentary, maintained or latching."],"drawingChecklist":["Identify the actuator and contact terminals.","State the intended operating mode.","Link additional contact blocks to the same operator device."],"distinction":"A NO contact symbol by itself does not identify the pushbutton actuator or its mechanical operating mode.","facts":[{"label":"Normal contact state","value":"Open"},{"label":"Operating mode","value":"Momentary or maintained; specify explicitly"},{"label":"Actuator purpose","value":"Circuit-specific label"},{"label":"Public Autodesk reference names","value":"HPB11, VPB11 (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-pushbuttons","relevance":"Public NO pushbutton and operating-mode variants."}],"related":["pushbutton-nc","normally-open-contact","selector-switch","relay-coil"],"artwork":"push-no","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/pushbutton-no","illustration":"https://eloragrid.ai/library/illustrations/pushbutton-no.svg"},{"slug":"pushbutton-nc","name":"Normally closed pushbutton","kind":"symbol","abbreviation":"PB NC","aliases":["stop pushbutton","NC push button","momentary break pushbutton","HPB12","VPB12"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A pushbutton contact normally shown closed before actuation.","description":["A normally closed pushbutton has a contact closed in its specified normal state. Actuation changes that contact state according to the selected operator and contact block. Momentary, maintained, latching and positive-opening characteristics must be identified from device documentation.","A stop circuit is a common use, but the generic representation does not establish emergency-stop suitability or the required control-system behaviour. Operator labels, device specifications and the complete circuit remain necessary."],"readingNotes":["Identify the contact block and its parent operator.","Read mechanical and contact characteristics from the manufacturer information."],"drawingChecklist":["Show terminal designations.","State the mechanical operating mode.","Reference the complete circuit purpose and device selection."],"distinction":"An ordinary NC pushbutton and an emergency-stop device are not interchangeable solely because both drawings show a closed contact.","facts":[{"label":"Normal contact state","value":"Closed"},{"label":"Safety function","value":"Requires complete device and circuit assessment"},{"label":"Operating mode","value":"Device-specific"},{"label":"Public Autodesk reference names","value":"HPB12, VPB12 (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-pushbuttons","relevance":"Public NC pushbutton and actuator variants."}],"related":["pushbutton-no","emergency-stop","normally-closed-contact","relay-coil"],"artwork":"push-nc","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/pushbutton-nc","illustration":"https://eloragrid.ai/library/illustrations/pushbutton-nc.svg"},{"slug":"emergency-stop","name":"Emergency-stop operator","kind":"symbol","abbreviation":"E-stop","aliases":["emergency stop","mushroom pushbutton","emergency shutdown operator"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"An identified emergency-stop operator and its documented contact arrangement.","description":["An emergency-stop operator is identified by its intended function and the properties of the selected device. A schematic may show its contact blocks, actuator and reset or latching features. The drawing must connect those features to the operator description and the complete control-system design.","This educational preview identifies the concept without specifying a safety circuit. A mushroom actuator, NC contact or stop label alone does not establish the required safety performance. Use the applicable standards, risk assessment and manufacturer information for the actual implementation."],"readingNotes":["Read the operator identification together with all associated contact blocks.","Do not infer safety performance from the actuator shape or a single contact mark."],"drawingChecklist":["Identify the operator and documented reset mode.","Reference contact and mechanical characteristics.","Link the complete control-system documentation."],"distinction":"Emergency stop is a system function. A generic mushroom pushbutton depiction does not certify an emergency-stop implementation.","facts":[{"label":"Representation","value":"Operator concept and associated contacts"},{"label":"Mechanical properties","value":"Manufacturer-specific"},{"label":"Safety assessment","value":"Not provided by this illustration"}],"references":[{"sourceId":"autodesk-pushbuttons","relevance":"Public mushroom-head, latching and positive-break contact categories."}],"related":["pushbutton-nc","normally-closed-contact","control-cabinet","relay-coil"],"artwork":"emergency","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/emergency-stop","illustration":"https://eloragrid.ai/library/illustrations/emergency-stop.svg"},{"slug":"selector-switch","name":"Selector switch","kind":"symbol","abbreviation":"SS","aliases":["hand off auto","HOA","local remote switch","manual automatic selector","HSS112","VSS112"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"An operator switch selecting between documented control positions.","description":["A selector switch provides a choice between operating positions such as local and remote or manual and automatic. Its contacts may be shown separately from the operator symbol. The contact truth table or switching schedule defines which contacts operate in each position.","Maintained positions and spring-return positions behave differently. Labels, detents and return direction should be made explicit. A contact mark alone cannot describe the full switching sequence of a multi-position selector."],"readingNotes":["Read the position labels and any contact schedule together.","Identify maintained positions and returning positions from documented operator data."],"drawingChecklist":["Name each position.","Reference the associated contact blocks and terminals.","Show the return behaviour and switching schedule."],"distinction":"A changeover contact describes connections; a selector switch also includes an operator and its position behaviour.","facts":[{"label":"Operating positions","value":"Defined by the selected operator"},{"label":"Return behaviour","value":"Maintained or returning"},{"label":"Contact relationship","value":"Switching schedule and terminal documentation"},{"label":"Public Autodesk reference names","value":"HSS112, VSS112 (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-selectors","relevance":"Public selector-switch positions and contact variants."}],"related":["changeover-contact","pushbutton-no","normally-open-contact","control-cabinet"],"artwork":"selector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/selector-switch","illustration":"https://eloragrid.ai/library/illustrations/selector-switch.svg"},{"slug":"indicator-lamp","name":"Indicator lamp","kind":"symbol","abbreviation":"Lamp","aliases":["pilot light","indicating light","status lamp"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A visual indicator associated with a documented control or equipment condition.","description":["An indicator lamp shows an operating condition defined by its circuit and label. The generic representation identifies an indicating element; it does not define what illumination means, the supply voltage or whether the device is continuously lit or flashing.","A schematic should explain the condition driving the indication. The front-panel description should match the electrical label, so a reviewer can follow the indication from operator interface to contact, relay or controller output."],"readingNotes":["Read the text describing the indicated condition.","Follow the circuit supplying the lamp and identify any flashing or test function."],"drawingChecklist":["Record the indication label.","Reference the supply and device type.","Align schematic identification with the panel layout."],"distinction":"An indication mark does not establish that equipment is safe, isolated or de-energised. Its meaning comes from the full circuit and operating documentation.","facts":[{"label":"Purpose","value":"Visual indication"},{"label":"Meaning","value":"Defined by label and control circuit"},{"label":"Electrical characteristics","value":"Device-specific"}],"references":[{"sourceId":"autodesk-lamps","relevance":"Public pilot-light and indication categories."},{"sourceId":"autodesk-index","relevance":"Public lighting and indication drawing categories."}],"related":["normally-open-contact","relay-coil","plc-io","control-cabinet"],"artwork":"lamp","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/indicator-lamp","illustration":"https://eloragrid.ai/library/illustrations/indicator-lamp.svg"},{"slug":"terminal","name":"Terminal connection","kind":"symbol","abbreviation":"Terminal","aliases":["terminal block symbol","terminal point","connection terminal","terminal strip connection","HT0002","VT0002"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"An identified electrical connection point linking schematic and wiring information.","description":["A terminal representation identifies a connection point for conductors. The terminal number and strip or assembly identifier link the schematic to physical wiring documentation. A wire number and terminal number identify different things and should not be substituted for one another.","Terminal assemblies can include links, disconnect facilities, fuses or test access. Those properties require additional identification. A generic round terminal representation does not establish the construction or rating of a selected terminal block."],"readingNotes":["Read the strip identifier and terminal identifier together.","Check whether the representation denotes a simple connection or an additional device function."],"drawingChecklist":["Match the terminal schedule.","Keep wire and terminal numbers distinct.","Reference links, test facilities and device data where applicable."],"distinction":"An electrical junction and a physical terminal are different concepts. A connection dot alone does not necessarily identify a terminal block.","facts":[{"label":"Identification","value":"Strip or assembly plus terminal number"},{"label":"Wire number","value":"Separate conductor identification"},{"label":"Physical construction","value":"Manufacturer-specific"},{"label":"Public Autodesk reference names","value":"HT0002, VT0002 (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-terminals","relevance":"Public terminal-number and wire-number variants."},{"sourceId":"terminal-disconnect","relevance":"Manufacturer example of terminals with added disconnect functions."}],"related":["ct-test-terminal","terminal-strip","normally-open-contact","protective-earth"],"artwork":"terminal","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/terminal","illustration":"https://eloragrid.ai/library/illustrations/terminal.svg"},{"slug":"ct-test-terminal","name":"CT test terminal","kind":"symbol","abbreviation":"CT test","aliases":["CT shorting terminal","current transformer test block","test disconnect terminal"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A current-transformer terminal arrangement providing documented test and shorting facilities.","description":["A CT test-terminal arrangement connects current-transformer secondary wiring to measurement or protection equipment and provides the test or short-circuit facilities specified for the selected assembly. Its representation must be read with the manufacturer circuit and operating documentation.","Test-disconnect terminals are not all interchangeable. CT applications require the correct shorting behaviour and accessory arrangement. This reference explains what to identify in a drawing, not a procedure for disconnecting or working on a live CT circuit."],"readingNotes":["Identify each CT secondary path and the associated test or shorting connections.","Do not infer the operation of a test plug or link from a generic terminal mark."],"drawingChecklist":["Reference the exact terminal assembly.","Identify shorting links and test accessories.","Cross-reference the CT and connected measurement device."],"distinction":"A generic disconnect terminal is not automatically suitable for a CT secondary circuit. Use an arrangement specified for the CT application.","facts":[{"label":"Application","value":"CT secondary measuring and test circuit"},{"label":"Shorting behaviour","value":"Specific to selected assembly"},{"label":"Operating procedure","value":"Follow manufacturer and authorised work instructions"}],"references":[{"sourceId":"ct-terminals","relevance":"Manufacturer CT measuring, testing and leading-short-circuit terminal arrangements."},{"sourceId":"terminal-disconnect","relevance":"Contrast with generic disconnect-terminal products."}],"related":["current-transformer","terminal","terminal-strip","50-instantaneous-overcurrent"],"artwork":"ct-test","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/ct-test-terminal","illustration":"https://eloragrid.ai/library/illustrations/ct-test-terminal.svg"},{"slug":"power-transformer","name":"Power transformer","kind":"symbol","abbreviation":"TX","aliases":["two winding transformer","distribution transformer","power transformer symbol","HXF1T2","VXF1T2"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"Equipment transferring electrical power between winding circuits.","description":["A power-transformer representation identifies equipment transferring electrical power between winding circuits. The generic mark can show the relationship between windings, but voltage levels, winding connections, vector group, rating and earthing information require additional annotations and equipment references.","Two-winding, three-winding and autotransformer arrangements describe different configurations. The SLD should identify the intended configuration clearly and link it to the transformer schedule and any associated protection or GA drawings."],"readingNotes":["Read the winding count and electrical connections before interpreting the rating labels.","Use the equipment reference to distinguish a power transformer from an instrument transformer."],"drawingChecklist":["Document the specified rating and winding connections.","Reference earthing and protection arrangements.","Link the equipment schedule and physical drawing."],"distinction":"A transformer used for voltage measurement is a VT or PT. Its function and secondary circuit differ from those of a power transformer.","facts":[{"label":"Configuration","value":"Winding arrangement must be specified"},{"label":"Ratings","value":"Equipment schedule"},{"label":"Physical drawing","value":"Model-specific GA and manufacturer information"},{"label":"Public Autodesk reference names","value":"HXF1T2, VXF1T2 (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-transformers","relevance":"Public transformer types and winding variants."},{"sourceId":"manufacturer-cad","relevance":"Official directory for model-specific equipment CAD."}],"related":["voltage-transformer","current-transformer","transformer-envelope","87-differential"],"artwork":"transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/power-transformer","illustration":"https://eloragrid.ai/library/illustrations/power-transformer.svg"},{"slug":"generator","name":"Generator","kind":"symbol","abbreviation":"GEN","aliases":["genset","generator set","alternator","HPW1G7","VPW1G7"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"An electrical generating source represented in a power-system drawing.","description":["A generator representation identifies an electrical source in a power system. Its electrical connections and associated switching describe how it supplies the system. The equipment documentation establishes machine type, rating, voltage, earthing and operating capabilities.","Generator systems can also include transfer controls, synchronising, protection and paralleling equipment. These functions should be identified separately rather than compressed into a single generic generator mark. A GA drawing provides the physical package and interface information."],"readingNotes":["Follow the generator connection through the associated switching and protection.","Identify whether the drawing describes standby transfer, parallel operation or another documented system arrangement."],"drawingChecklist":["Reference the generator equipment schedule.","Cross-reference switching, control and protection.","Link the package GA and installation interfaces."],"distinction":"A generator symbol identifies an electrical source. It does not establish permission to parallel with another source or define the transfer sequence.","facts":[{"label":"Role","value":"Electrical source"},{"label":"Operating arrangement","value":"Documented at system level"},{"label":"Physical package","value":"Separate GA and equipment reference"},{"label":"Public Autodesk reference names","value":"HPW1G7, VPW1G7 (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-generators","relevance":"Public generator types and representations."},{"sourceId":"generator-controls","relevance":"Manufacturer generator switchgear and controls context."}],"related":["generator-package","transfer-switch","25-synchronism-check","32-directional-power"],"artwork":"generator","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/generator","illustration":"https://eloragrid.ai/library/illustrations/generator.svg"},{"slug":"motor","name":"Three-phase motor","kind":"symbol","abbreviation":"M","aliases":["electric motor","3 phase motor","motor load","HMO13","VMO13"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"An electrical motor load connected to its switching and protective equipment.","description":["A motor representation identifies an electrical machine operating as a load in the stated system arrangement. Connection count, motor type and additional winding or rotor detail can change the representation. Its nameplate and equipment schedule provide the selected machine data.","The SLD places the motor and its feeder equipment. A schematic shows the controller, coil supply, protection interfaces and auxiliary functions. A simple circle and motor label do not establish a complete motor-starting or protective arrangement."],"readingNotes":["Follow the feeder back to its switching and protective devices.","Read the documented motor connection and starting arrangement."],"drawingChecklist":["Reference motor rating and connection data.","Identify the starter or control arrangement.","Cross-reference auxiliary and protection circuits."],"distinction":"A contactor switches the motor circuit. Motor protection and short-circuit interruption may be provided by additional specified equipment.","facts":[{"label":"Representation","value":"Electrical machine load"},{"label":"Connection detail","value":"Motor-specific"},{"label":"Feeder equipment","value":"Separate switching and protection"},{"label":"Public Autodesk reference names","value":"HMO13, VMO13 (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-motors","relevance":"Public three-phase motor variants."},{"sourceId":"switching-devices","relevance":"Manufacturer description of contactor and protective roles."}],"related":["contactor","circuit-breaker","49-thermal-protection","relay-coil"],"artwork":"motor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/motor","illustration":"https://eloragrid.ai/library/illustrations/motor.svg"},{"slug":"plc-io","name":"PLC input / output","kind":"symbol","abbreviation":"PLC I/O","aliases":["PLC input","PLC output","digital input","digital output","analogue input","analog output","controller IO","PLCIOI1T","PLCIOO1T"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A controller interface point connecting field signals to an identified module channel.","description":["A PLC input or output point connects a field signal with a controller module and channel. Input and output, digital and analogue, and one-wire or multi-wire arrangements are distinct characteristics. The module specification establishes electrical behaviour and terminal information.","A schematic should connect channel identification to the I/O schedule and field device. Shared supplies, commons and isolation boundaries require their own documentation. A generic controller box is not a pinout or wiring instruction for a particular module."],"readingNotes":["Identify module, channel and signal direction.","Use the selected module documentation to interpret supply, common and terminal requirements."],"drawingChecklist":["Match the I/O schedule.","Identify signal type and channel reference.","Link module terminals and field-device documentation."],"distinction":"An input point, output point and communications connection are different interfaces. A generic box cannot establish their electrical compatibility.","facts":[{"label":"Channel identity","value":"Controller, module and point"},{"label":"Signal characteristics","value":"Selected module specification"},{"label":"Interface direction","value":"Input or output"},{"label":"Public Autodesk reference names","value":"PLCIOI1T, PLCIOO1T (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-plc","relevance":"Public input/output point and wiring-count categories."}],"related":["terminal","indicator-lamp","selector-switch","control-cabinet"],"artwork":"plc","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/plc-io","illustration":"https://eloragrid.ai/library/illustrations/plc-io.svg"},{"slug":"capacitor","name":"Capacitor","kind":"symbol","abbreviation":"C","aliases":["capacitor bank","capacitive component","power factor correction capacitor","HCA1","VCA1"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A capacitive component or bank identified with its circuit function and ratings.","description":["A capacitor representation identifies a capacitive component or arrangement in a circuit. Polarised, non-polarised, adjustable and other variants need the appropriate representation and annotations. In power drawings a capacitor bank is a system assembly, rather than merely a scaled-up generic component mark.","Ratings, discharge arrangements, switching and associated reactors or protection depend on the application and selected equipment. A symbol is an identification aid; it does not provide those design values."],"readingNotes":["Identify whether the drawing denotes a component or a bank assembly.","Read polarity or adjustable features only where the selected variant documents them."],"drawingChecklist":["Reference the component or bank rating.","Identify any switching and associated protective equipment.","Link the equipment documentation for discharge or reactor arrangements."],"distinction":"A capacitor-bank representation does not identify every component of the assembled bank or establish its switching duty.","facts":[{"label":"Variant","value":"Application-specific"},{"label":"Polarity","value":"Must be explicitly represented where relevant"},{"label":"Ratings","value":"Separate equipment data"},{"label":"Public Autodesk reference names","value":"HCA1, VCA1 (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-capacitors","relevance":"Public capacitor categories and variants."}],"related":["busbar","circuit-breaker","resistor","power-transformer"],"artwork":"capacitor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/capacitor","illustration":"https://eloragrid.ai/library/illustrations/capacitor.svg"},{"slug":"resistor","name":"Resistor","kind":"symbol","abbreviation":"R","aliases":["resistive component","fixed resistor","shunt resistor","HRE1B","VRE1B"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A resistive component with its value and purpose documented separately.","description":["A resistor representation identifies a resistive component in a circuit. Different drawing conventions can use different basic outlines, while additional qualifiers distinguish variable resistors, shunts or heating elements. The value, rating and purpose are separate annotations.","In power-system controls, a resistive component may belong to measurement, suppression or another specific circuit. A neutral-earthing resistor is a specialised system component and should not be identified only with an unqualified generic resistor mark."],"readingNotes":["Read the component value and application label alongside the mark.","Check whether a qualifier identifies a variable device, heater, shunt or another variant."],"drawingChecklist":["Reference resistance and rating information.","Identify the circuit purpose.","Distinguish specialised assemblies from a generic component."],"distinction":"IEC-style rectangular and other conventional resistor depictions can describe the same component concept, but qualifiers and documentation still matter.","facts":[{"label":"Component data","value":"Resistance and power rating"},{"label":"Variants","value":"Fixed, variable, shunt and other applications"},{"label":"Graphic convention","value":"Check the drawing legend"},{"label":"Public Autodesk reference names","value":"HRE1B, VRE1B (vendor identifiers, not IEC symbol IDs)"}],"references":[{"sourceId":"autodesk-resistors","relevance":"Public fixed, variable, shunt and heater categories."},{"sourceId":"ieee-315","relevance":"Historical graphic-symbol reference; vendor conventions may differ."}],"related":["capacitor","relay-coil","terminal","power-transformer"],"artwork":"resistor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/resistor","illustration":"https://eloragrid.ai/library/illustrations/resistor.svg"},{"slug":"protective-earth","name":"Protective earth","kind":"symbol","abbreviation":"PE","aliases":["protective ground","PE connection","protective earthing","ground symbol"],"category":"connections-wiring","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"An identified connection serving the protective earthing function.","description":["Protective-earth identification indicates a connection serving the protective earthing function. It should be distinguished from functional earthing, signal references and other grounding conventions. The drawing context and applicable documentation establish the meaning of each connection.","A protective-earth mark does not specify conductor size, bonding arrangement or installation compliance. Those requirements are documented in the electrical design, equipment information and applicable installation rules. Equipment-marking symbols and diagram symbols can belong to different standards."],"readingNotes":["Read the connection label and its intended function.","Keep diagram references distinct from markings physically applied to equipment."],"drawingChecklist":["Identify the protective connection.","Reference bonding and conductor information separately.","Avoid ambiguous earth or signal-reference labels."],"distinction":"Protective earth, functional earth and a signal common are different functions even when a drawing uses visually related marks.","facts":[{"label":"Function","value":"Protective earthing"},{"label":"Installation detail","value":"Separate design documentation"},{"label":"Equipment markings","value":"May reference a different symbol standard"}],"references":[{"sourceId":"iec-diagrams","relevance":"Official diagram-symbol reference and related symbol standards."},{"sourceId":"autodesk-index","relevance":"Public electrical drawing-category reference."}],"related":["earthing-switch","terminal","control-cabinet","switchboard"],"artwork":"earth","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/protective-earth","illustration":"https://eloragrid.ai/library/illustrations/protective-earth.svg"},{"slug":"battery","name":"Battery","kind":"symbol","abbreviation":"BAT","aliases":["battery bank","battery storage","DC battery"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"An electrochemical electrical source or storage element represented in a circuit.","description":["A battery representation identifies an electrochemical source or energy-storage element. The generic depiction can suggest cells or polarity, but it does not determine the number of cells, chemistry, voltage, energy capacity or protective equipment in the selected system.","A battery energy storage system adds controls, power conversion and other equipment around its storage element. System drawings should distinguish the DC battery circuit from AC conversion, switching and protection. The physical battery cabinet is a separate GA object."],"readingNotes":["Identify whether the drawing denotes a cell, battery bank or complete storage system.","Read DC polarity and the conversion interface from the documented arrangement."],"drawingChecklist":["Reference voltage and storage equipment data.","Separate DC storage and AC interfaces.","Cross-reference protective and isolation equipment."],"distinction":"A battery is a storage element. A BESS includes additional equipment and controls; the terms do not identify identical scope.","facts":[{"label":"Electrical interface","value":"DC"},{"label":"Physical package","value":"Model-specific"},{"label":"System boundary","value":"Distinguish battery from complete BESS"}],"references":[{"sourceId":"energy-storage","relevance":"Public explanation of storage and power conversion."},{"sourceId":"battery-cabinets","relevance":"Manufacturer example of a storage-system equipment composition."}],"related":["battery-cabinet","power-converter","pcs-cabinet","busbar"],"artwork":"battery","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/battery","illustration":"https://eloragrid.ai/library/illustrations/battery.svg"},{"slug":"power-converter","name":"Power converter / inverter","kind":"symbol","abbreviation":"PCS","aliases":["inverter","power conversion system","AC DC converter","battery inverter","PV inverter"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"An identified interface converting electrical power between documented circuit forms.","description":["A power converter changes electrical power between the circuit forms specified for its application. In a battery energy storage system, a power conversion system commonly provides the interface between DC storage and an AC system. Direction of power flow and operating capabilities are product-specific.","The drawing should label the AC and DC interfaces and identify switching, protection and controls separately. A generic converter box does not establish grid-forming, grid-following, island operation or export capability. Those behaviours require the selected product and system documentation."],"readingNotes":["Read the AC/DC interface labels before following power flow.","Identify the selected operating capabilities from the product and system documentation."],"drawingChecklist":["Identify AC and DC interfaces.","Reference the selected converter and control equipment.","Cross-reference isolation and protective devices."],"distinction":"Inverter, converter and PCS can denote different equipment boundaries. Define what is included in the represented assembly.","facts":[{"label":"Interfaces","value":"Application-specific AC and DC connections"},{"label":"Power-flow direction","value":"Product-specific"},{"label":"Operating capabilities","value":"Not established by the generic graphic"}],"references":[{"sourceId":"energy-storage","relevance":"Manufacturer explanation of the DC-storage to AC power-conversion interface."}],"related":["battery","pcs-cabinet","battery-cabinet","circuit-breaker"],"artwork":"converter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/power-converter","illustration":"https://eloragrid.ai/library/illustrations/power-converter.svg"},{"slug":"25-synchronism-check","name":"Synchronism check","kind":"function","abbreviation":"25","aliases":["synchronism check","synchronizing check","synchrocheck","sync check"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Checks documented synchronising conditions before a permitted connection.","description":["A synchronism-check function supervises the conditions for connecting electrical sources or system sections. It is associated with the measured quantities and operating logic specified for the selected protection or control device.","On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure."],"readingNotes":["Identify the voltage measurement inputs used by the function.","Read the closing-permission relationship in the documented control scheme."],"drawingChecklist":["Reference measured source or bus voltages.","Identify the supervised closing device.","Link the control and protection documentation."],"distinction":"Synchronism checking is a permissive function; a generic 25 label is not a complete synchronising controller or operating sequence.","facts":[{"label":"ANSI / IEEE function number","value":"25"},{"label":"Equipment implementation","value":"Consult the selected device manual"},{"label":"Suffix interpretation","value":"Application and manufacturer documentation"}],"references":[{"sourceId":"device-numbers","relevance":"Public manufacturer table used to check the base function-number name."},{"sourceId":"ieee-functions","relevance":"Normative publication reference for the device-function convention."},{"sourceId":"abb-functions","relevance":"Public examples of manufacturer-specific function names and suffixes."}],"related":["voltage-transformer","generator","52-ac-circuit-breaker"],"artwork":"function","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/25-synchronism-check","illustration":"https://eloragrid.ai/library/illustrations/25-synchronism-check.svg"},{"slug":"27-undervoltage","name":"Undervoltage","kind":"function","abbreviation":"27","aliases":["under voltage","UV protection"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"A function responding to voltage below its configured operating criteria.","description":["An undervoltage function detects a voltage condition below its configured criteria. On an SLD, the number identifies the function rather than a particular relay product or its voltage and time settings.","On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure."],"readingNotes":["Identify the voltage source measured by the device.","Use the relay documentation to determine how the element is implemented and used."],"drawingChecklist":["Reference the voltage inputs.","Identify the associated relay or controller.","Link the trip, alarm or permissive logic."],"distinction":"An undervoltage element and an undervoltage release are related voltage concepts but can describe different equipment and operating arrangements.","facts":[{"label":"ANSI / IEEE function number","value":"27"},{"label":"Equipment implementation","value":"Consult the selected device manual"},{"label":"Suffix interpretation","value":"Application and manufacturer documentation"}],"references":[{"sourceId":"device-numbers","relevance":"Public manufacturer table used to check the base function-number name."},{"sourceId":"ieee-functions","relevance":"Normative publication reference for the device-function convention."},{"sourceId":"abb-functions","relevance":"Public examples of manufacturer-specific function names and suffixes."}],"related":["59-overvoltage","voltage-transformer","power-converter"],"artwork":"function","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/27-undervoltage","illustration":"https://eloragrid.ai/library/illustrations/27-undervoltage.svg"},{"slug":"32-directional-power","name":"Directional power","kind":"function","abbreviation":"32","aliases":["reverse power","directional power relay"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"A function responding to power with a specified direction and operating condition.","description":["Directional power protection uses the direction and magnitude of power according to the implementation and configured purpose. Reverse-power applications are one use encountered in generating systems; the generic device number does not specify the complete application.","On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure."],"readingNotes":["Identify both the current and voltage measurement references.","Read the defined forward or reverse direction from the system and relay documentation."],"drawingChecklist":["Document measurement references.","State the applied direction convention.","Link the protection application and associated device."],"distinction":"Directional power and directional overcurrent measure different operating quantities. The numbers 32 and 67 are not interchangeable.","facts":[{"label":"ANSI / IEEE function number","value":"32"},{"label":"Equipment implementation","value":"Consult the selected device manual"},{"label":"Suffix interpretation","value":"Application and manufacturer documentation"}],"references":[{"sourceId":"device-numbers","relevance":"Public manufacturer table used to check the base function-number name."},{"sourceId":"ieee-functions","relevance":"Normative publication reference for the device-function convention."}],"related":["67-directional-overcurrent","current-transformer","generator"],"artwork":"function","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/32-directional-power","illustration":"https://eloragrid.ai/library/illustrations/32-directional-power.svg"},{"slug":"46-current-unbalance","name":"Current unbalance / negative sequence","kind":"function","abbreviation":"46","aliases":["negative sequence","phase unbalance","current imbalance"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"A current phase-balance or reverse-phase function used in documented protection applications.","description":["Device function number 46 is associated with reverse-phase or phase-balance current protection. Manufacturer implementations often use negative-sequence or current-unbalance quantities. The implementation, measurement basis and protected equipment must be identified in the protection documentation.","On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure."],"readingNotes":["Identify the phase-current measurements used by the device.","Confirm the manufacturer name and implementation rather than relying only on the number."],"drawingChecklist":["Reference phase-current inputs.","Identify the protected machine or circuit.","Link the selected relay function documentation."],"distinction":"Current unbalance and voltage phase-sequence or balance functions use different measured quantities. Identify the element explicitly.","facts":[{"label":"ANSI / IEEE function number","value":"46"},{"label":"Equipment implementation","value":"Consult the selected device manual"},{"label":"Suffix interpretation","value":"Application and manufacturer documentation"}],"references":[{"sourceId":"device-numbers","relevance":"Public manufacturer table used to check the base function-number name."},{"sourceId":"ieee-functions","relevance":"Normative publication reference for the device-function convention."},{"sourceId":"abb-functions","relevance":"Public examples of manufacturer-specific function names and suffixes."}],"related":["49-thermal-protection","current-transformer","motor"],"artwork":"function","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/46-current-unbalance","illustration":"https://eloragrid.ai/library/illustrations/46-current-unbalance.svg"},{"slug":"49-thermal-protection","name":"Thermal protection","kind":"function","abbreviation":"49","aliases":["thermal overload","machine thermal relay","transformer thermal protection"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"A thermal protection function for a documented machine or transformer application.","description":["A thermal protection function responds to a thermal condition or model appropriate to the selected machine or transformer application. Its inputs and implementation vary between devices, so the number alone does not establish a sensor arrangement or a thermal model.","On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure."],"readingNotes":["Identify whether the device uses measured temperature, electrical inputs or another documented implementation.","Link the function to the protected equipment and manufacturer documentation."],"drawingChecklist":["Identify the protected equipment.","Reference required measurements or sensors.","Link the thermal function documentation."],"distinction":"A thermal relay, temperature sensor and instantaneous overcurrent element are different devices or functions.","facts":[{"label":"ANSI / IEEE function number","value":"49"},{"label":"Equipment implementation","value":"Consult the selected device manual"},{"label":"Suffix interpretation","value":"Application and manufacturer documentation"}],"references":[{"sourceId":"device-numbers","relevance":"Public manufacturer table used to check the base function-number name."},{"sourceId":"ieee-functions","relevance":"Normative publication reference for the device-function convention."},{"sourceId":"abb-functions","relevance":"Public examples of manufacturer-specific function names and suffixes."}],"related":["motor","power-transformer","50-instantaneous-overcurrent"],"artwork":"function","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/49-thermal-protection","illustration":"https://eloragrid.ai/library/illustrations/49-thermal-protection.svg"},{"slug":"50-instantaneous-overcurrent","name":"Instantaneous overcurrent","kind":"function","abbreviation":"50","aliases":["instantaneous OC","50P","50N","50G","instantaneous over current"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"An overcurrent function without an intentional operating time delay in its instantaneous application.","description":["An instantaneous overcurrent function detects current above its operating criteria without an intentional time delay in the instantaneous application. Actual operating time, implementation and any combined 50/51 labelling are documented by the manufacturer.","On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure."],"readingNotes":["Identify phase, residual or another measurement from the full designation.","Separate the function reference from pickup and other settings."],"drawingChecklist":["Reference CT or other current inputs.","Identify the protected circuit and relay.","Link the associated trip logic."],"distinction":"Instantaneous does not mean zero physical operating time. A 50 label does not supply pickup values or prove coordination with other protection.","facts":[{"label":"ANSI / IEEE function number","value":"50"},{"label":"Equipment implementation","value":"Consult the selected device manual"},{"label":"Suffix interpretation","value":"Application and manufacturer documentation"}],"references":[{"sourceId":"device-numbers","relevance":"Public manufacturer table used to check the base function-number name."},{"sourceId":"ieee-functions","relevance":"Normative publication reference for the device-function convention."},{"sourceId":"abb-functions","relevance":"Public examples of manufacturer-specific function names and suffixes."}],"related":["51-time-overcurrent","current-transformer","52-ac-circuit-breaker"],"artwork":"function","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/50-instantaneous-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/50-instantaneous-overcurrent.svg"},{"slug":"51-time-overcurrent","name":"Time overcurrent","kind":"function","abbreviation":"51","aliases":["time delayed overcurrent","inverse time overcurrent","51P","51N","51G","time over current"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"An overcurrent function with a documented time characteristic.","description":["A time overcurrent function detects an overcurrent condition using the configured time characteristic. Depending on the device and application, the implementation can include inverse-time or definite-time behaviour. Its number does not specify a curve, pickup or delay.","On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure."],"readingNotes":["Read the full function designation, including any phase or earth-fault suffix.","Use the protection settings and coordination documentation to interpret its operation."],"drawingChecklist":["Reference measured current inputs.","Identify the applied time characteristic separately.","Link the relay and trip scheme."],"distinction":"Functions 50 and 51 describe different time behaviour. One multifunction relay can implement both without becoming two separate physical devices.","facts":[{"label":"ANSI / IEEE function number","value":"51"},{"label":"Equipment implementation","value":"Consult the selected device manual"},{"label":"Suffix interpretation","value":"Application and manufacturer documentation"}],"references":[{"sourceId":"device-numbers","relevance":"Public manufacturer table used to check the base function-number name."},{"sourceId":"ieee-functions","relevance":"Normative publication reference for the device-function convention."},{"sourceId":"abb-functions","relevance":"Public examples of manufacturer-specific function names and suffixes."}],"related":["50-instantaneous-overcurrent","current-transformer","67-directional-overcurrent"],"artwork":"function","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/51-time-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/51-time-overcurrent.svg"},{"slug":"52-ac-circuit-breaker","name":"AC circuit breaker","kind":"function","abbreviation":"52","aliases":["ANSI 52","AC breaker","52a","52b"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"The device-function number identifying an AC circuit breaker.","description":["Device function number 52 identifies an AC circuit breaker in the power-system device-function convention. It can appear in equipment identification, control references or a protection drawing, but it remains distinct from the graphical symbol and product specification.","On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure."],"readingNotes":["Associate the number with the intended breaker equipment reference.","Read auxiliary-contact and control designations from the applicable documentation."],"drawingChecklist":["Link the breaker equipment tag.","Cross-reference close and trip circuits.","Reference auxiliary contacts and device documentation."],"distinction":"The number 52 identifies a device function. It is not an IEC graphical-symbol identifier, breaker current rating or manufacturer model.","facts":[{"label":"ANSI / IEEE function number","value":"52"},{"label":"Equipment implementation","value":"Consult the selected device manual"},{"label":"Suffix interpretation","value":"Application and manufacturer documentation"}],"references":[{"sourceId":"device-numbers","relevance":"Public manufacturer table used to check the base function-number name."},{"sourceId":"ieee-functions","relevance":"Normative publication reference for the device-function convention."}],"related":["circuit-breaker","normally-open-contact","86-lockout"],"artwork":"function","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/52-ac-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/52-ac-circuit-breaker.svg"},{"slug":"59-overvoltage","name":"Overvoltage","kind":"function","abbreviation":"59","aliases":["over voltage","OV protection","59N"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"A function responding to voltage above its configured operating criteria.","description":["An overvoltage function detects a voltage condition above its configured criteria. The full designation and manufacturer information identify the measured quantity, implementation and application. A generic 59 reference does not establish trip values or time delays.","On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure."],"readingNotes":["Identify the voltage measurement and full function suffix.","Read whether the configured result is an alarm, trip or other control action."],"drawingChecklist":["Reference voltage inputs.","Identify the full relay function.","Link the operating logic and settings documentation."],"distinction":"A phase overvoltage element and a residual-voltage or neutral-displacement application may use different measurements and suffixes.","facts":[{"label":"ANSI / IEEE function number","value":"59"},{"label":"Equipment implementation","value":"Consult the selected device manual"},{"label":"Suffix interpretation","value":"Application and manufacturer documentation"}],"references":[{"sourceId":"device-numbers","relevance":"Public manufacturer table used to check the base function-number name."},{"sourceId":"ieee-functions","relevance":"Normative publication reference for the device-function convention."},{"sourceId":"abb-functions","relevance":"Public examples of manufacturer-specific function names and suffixes."}],"related":["27-undervoltage","voltage-transformer","power-converter"],"artwork":"function","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/59-overvoltage","illustration":"https://eloragrid.ai/library/illustrations/59-overvoltage.svg"},{"slug":"67-directional-overcurrent","name":"Directional overcurrent","kind":"function","abbreviation":"67","aliases":["directional OC","67N","67P","67G"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"An overcurrent function with a documented direction criterion.","description":["Directional overcurrent combines an overcurrent operating condition with a direction criterion defined by the device and application. Its full name and suffix can distinguish phase and earth-fault implementations, measurement inputs and operating stages.","On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure."],"readingNotes":["Identify the current input and the documented direction reference.","Follow the forward/reverse convention used in the protection scheme."],"drawingChecklist":["Reference all required measurement inputs.","State the direction convention.","Identify the relay element and associated trip logic."],"distinction":"A 67 reference is not the same as directional power 32. Their quantities and operating criteria differ.","facts":[{"label":"ANSI / IEEE function number","value":"67"},{"label":"Equipment implementation","value":"Consult the selected device manual"},{"label":"Suffix interpretation","value":"Application and manufacturer documentation"}],"references":[{"sourceId":"device-numbers","relevance":"Public manufacturer table used to check the base function-number name."},{"sourceId":"ieee-functions","relevance":"Normative publication reference for the device-function convention."},{"sourceId":"abb-functions","relevance":"Public examples of manufacturer-specific function names and suffixes."}],"related":["32-directional-power","51-time-overcurrent","current-transformer"],"artwork":"function","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/67-directional-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/67-directional-overcurrent.svg"},{"slug":"79-autoreclose","name":"AC autoreclosing","kind":"function","abbreviation":"79","aliases":["auto reclose","autoreclosing relay","reclosing function"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"A function coordinating a documented automatic reclosing sequence.","description":["An AC autoreclosing function coordinates a reclosing sequence for the associated switching device according to the chosen application and configuration. Its label identifies the function but does not specify shot count, timing, permissives or blocking conditions.","On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure."],"readingNotes":["Identify the breaker and the protection functions associated with the sequence.","Read permissive, blocking and lockout relationships in the selected scheme."],"drawingChecklist":["Reference the controlled breaker.","Identify the associated protection and controls.","Link the documented sequence and blocking logic."],"distinction":"An autoreclose function and an automatic source-transfer function are different control arrangements.","facts":[{"label":"ANSI / IEEE function number","value":"79"},{"label":"Equipment implementation","value":"Consult the selected device manual"},{"label":"Suffix interpretation","value":"Application and manufacturer documentation"}],"references":[{"sourceId":"device-numbers","relevance":"Public manufacturer table used to check the base function-number name."},{"sourceId":"ieee-functions","relevance":"Normative publication reference for the device-function convention."},{"sourceId":"abb-functions","relevance":"Public examples of manufacturer-specific function names and suffixes."}],"related":["52-ac-circuit-breaker","25-synchronism-check","86-lockout"],"artwork":"function","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/79-autoreclose","illustration":"https://eloragrid.ai/library/illustrations/79-autoreclose.svg"},{"slug":"81-frequency","name":"Frequency protection","kind":"function","abbreviation":"81","aliases":["underfrequency","overfrequency","ROCOF","81U","81O","81R"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"A function responding to a documented frequency condition.","description":["Frequency protection responds to frequency conditions according to the selected implementation. Underfrequency, overfrequency and rate-of-change functions can be distinguished by additional suffixes and device documentation. A generic 81 reference does not determine which variant is applied.","On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure."],"readingNotes":["Read the complete designation, not only the base number.","Identify the voltage or other input from which the selected device derives its frequency measurement."],"drawingChecklist":["State the applied frequency function.","Reference the measurement and relay.","Link any trip, alarm or load-control action."],"distinction":"Underfrequency, overfrequency and rate-of-change are different functions even when their designations share the number 81.","facts":[{"label":"ANSI / IEEE function number","value":"81"},{"label":"Equipment implementation","value":"Consult the selected device manual"},{"label":"Suffix interpretation","value":"Application and manufacturer documentation"}],"references":[{"sourceId":"device-numbers","relevance":"Public manufacturer table used to check the base function-number name."},{"sourceId":"ieee-functions","relevance":"Normative publication reference for the device-function convention."},{"sourceId":"abb-functions","relevance":"Public examples of manufacturer-specific function names and suffixes."}],"related":["27-undervoltage","generator","power-converter"],"artwork":"function","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/81-frequency","illustration":"https://eloragrid.ai/library/illustrations/81-frequency.svg"},{"slug":"86-lockout","name":"Lockout","kind":"function","abbreviation":"86","aliases":["lockout relay","master trip lockout","ANSI 86"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"A lockout function or device with the documented reset and blocking behaviour.","description":["A lockout function or device latches an operating condition and participates in the specified trip or blocking arrangement. Its reset and implementation depend on the selected scheme. It can be realised in physical equipment or through documented control logic.","On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure."],"readingNotes":["Identify the initiating conditions and the affected devices.","Read reset and blocking behaviour from the actual scheme documentation."],"drawingChecklist":["Reference initiating functions.","Identify blocked or tripped devices.","Document the selected reset arrangement."],"distinction":"A lockout reference is not a mechanical isolation procedure and does not itself establish an authorised operating instruction.","facts":[{"label":"ANSI / IEEE function number","value":"86"},{"label":"Equipment implementation","value":"Consult the selected device manual"},{"label":"Suffix interpretation","value":"Application and manufacturer documentation"}],"references":[{"sourceId":"device-numbers","relevance":"Public manufacturer table used to check the base function-number name."},{"sourceId":"ieee-functions","relevance":"Normative publication reference for the device-function convention."}],"related":["52-ac-circuit-breaker","87-differential","relay-coil"],"artwork":"function","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/86-lockout","illustration":"https://eloragrid.ai/library/illustrations/86-lockout.svg"},{"slug":"87-differential","name":"Differential protection","kind":"function","abbreviation":"87","aliases":["differential relay","87T","87B","87G","differential protection relay"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"A function comparing documented electrical quantities across a protection zone.","description":["Differential protection compares quantities associated with the boundaries of a protection zone according to the selected implementation. Equipment and application suffixes can distinguish transformer, busbar, line or other arrangements. The base number alone does not define the zone or measurements.","On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure."],"readingNotes":["Identify the protected zone and each measurement boundary.","Read CT associations, polarity and any device-specific compensation from the protection documentation."],"drawingChecklist":["Identify the protected equipment or zone.","Reference measurement boundaries.","Link the relay application and trip destinations."],"distinction":"Transformer differential, busbar differential and other differential applications are not interchangeable merely because they share the base number 87.","facts":[{"label":"ANSI / IEEE function number","value":"87"},{"label":"Equipment implementation","value":"Consult the selected device manual"},{"label":"Suffix interpretation","value":"Application and manufacturer documentation"}],"references":[{"sourceId":"device-numbers","relevance":"Public manufacturer table used to check the base function-number name."},{"sourceId":"ieee-functions","relevance":"Normative publication reference for the device-function convention."},{"sourceId":"abb-functions","relevance":"Public examples of manufacturer-specific function names and suffixes."}],"related":["current-transformer","power-transformer","busbar"],"artwork":"function","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/87-differential","illustration":"https://eloragrid.ai/library/illustrations/87-differential.svg"},{"slug":"89-line-switch","name":"Line switch","kind":"function","abbreviation":"89","aliases":["ANSI 89","line disconnector","line disconnect"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"The device-function number used for a line-switching or disconnecting device in its documented application.","description":["Device function number 89 identifies a line switch in the power-system device-function convention. The selected equipment and drawing context establish its actual operating duties and capabilities; the number is not a substitute for a switch specification.","On a power drawing, keep this function reference connected to the selected equipment and its complete designation. A multifunction relay can implement several numbered functions. This entry explains the reference; it supplies no settings or commissioning procedure."],"readingNotes":["Identify the physical device associated with the reference.","Read switching, isolation and position information separately."],"drawingChecklist":["Link the equipment identification.","Reference the selected device capabilities.","Cross-reference control and position circuits."],"distinction":"The number 89 and number 52 identify different device functions. A drawing reference does not establish equivalent interruption capability.","facts":[{"label":"ANSI / IEEE function number","value":"89"},{"label":"Equipment implementation","value":"Consult the selected device manual"},{"label":"Suffix interpretation","value":"Application and manufacturer documentation"}],"references":[{"sourceId":"device-numbers","relevance":"Public manufacturer table used to check the base function-number name."},{"sourceId":"ieee-functions","relevance":"Normative publication reference for the device-function convention."}],"related":["disconnector","load-break-switch","52-ac-circuit-breaker"],"artwork":"function","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/89-line-switch","illustration":"https://eloragrid.ai/library/illustrations/89-line-switch.svg"},{"slug":"switchgear-panel","name":"Switchgear panel","kind":"object","abbreviation":"Panel","aliases":["switchgear cubicle","switchgear cabinet","MV panel"],"category":"power-distribution","drawingTypes":["GA"],"referenceFamilies":["Manufacturer"],"summary":"A generic arrangement object linking switching equipment to its manufacturer drawings.","description":["A switchgear-panel object represents the equipment envelope and interfaces used when arranging a switchroom or substation. The manufacturer and panel configuration establish the physical dimensions, cable entries, access sides and other installation information.","The original envelope illustration is unscaled and has no manufacturer dimensions. Follow the cited public resources to the exact product, then use its current drawing and installation information for engineering work."],"readingNotes":["Read plan and elevation views together.","Identify the actual panel configuration before placing its footprint."],"drawingChecklist":["Reference the current product GA.","Identify cable interfaces and access sides.","Link the SLD equipment identifier."],"distinction":"The panel envelope is a physical object; the breaker or switch symbol inside an SLD is an electrical representation.","facts":[{"label":"Object type","value":"Generic equipment reference"},{"label":"Dimensions","value":"Use the exact manufacturer/model drawing"},{"label":"Illustration scale","value":"Not to scale"},{"label":"Download scope","value":"Original concept envelope only"}],"references":[{"sourceId":"abb-switchgear","relevance":"Public switchgear equipment families."},{"sourceId":"manufacturer-cad","relevance":"Official model-specific CAD directory."}],"related":["circuit-breaker","ring-main-unit","switchboard"],"artwork":"panel","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/switchgear-panel","illustration":"https://eloragrid.ai/library/illustrations/switchgear-panel.svg"},{"slug":"switchboard","name":"Switchboard","kind":"object","abbreviation":"Board","aliases":["LV switchboard","distribution board","main switchboard","MSB","MDB","panelboard"],"category":"power-distribution","drawingTypes":["GA"],"referenceFamilies":["Manufacturer"],"summary":"A distribution assembly represented by a generic envelope in an arrangement drawing.","description":["A switchboard arrangement combines distribution equipment in an assembly whose configuration is defined by the selected design and manufacturer. A GA describes physical sections and interfaces; an SLD describes electrical connections and device functions.","The original envelope illustration is unscaled and has no manufacturer dimensions. Follow the cited public resources to the exact product, then use its current drawing and installation information for engineering work."],"readingNotes":["Match section identifiers between the GA and electrical schedule.","Read the access and cable arrangement from the selected assembly documentation."],"drawingChecklist":["Reference the assembly GA and schedule.","Identify section interfaces and cable entries.","Link equipment tags to electrical drawings."],"distinction":"A generic switchboard outline is not a production drawing, assembly design or verified installation envelope.","facts":[{"label":"Object type","value":"Generic equipment reference"},{"label":"Dimensions","value":"Use the exact manufacturer/model drawing"},{"label":"Illustration scale","value":"Not to scale"},{"label":"Download scope","value":"Original concept envelope only"}],"references":[{"sourceId":"manufacturer-cad","relevance":"Official CAD/BIM resources for distribution equipment."},{"sourceId":"switching-devices","relevance":"Public distribution switching equipment context."}],"related":["switchgear-panel","busbar","busbar-trunking"],"artwork":"switchboard","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/switchboard","illustration":"https://eloragrid.ai/library/illustrations/switchboard.svg"},{"slug":"ring-main-unit","name":"Ring main unit","kind":"object","abbreviation":"RMU","aliases":["ring main switchgear","secondary distribution unit"],"category":"power-distribution","drawingTypes":["GA"],"referenceFamilies":["Manufacturer"],"summary":"A secondary-distribution switchgear assembly with a selected combination of switching functions.","description":["A ring main unit is a compact secondary-distribution switchgear assembly with a manufacturer-defined combination of switching functions. Its electrical configuration and physical envelope depend on the chosen product, rather than on the abbreviation RMU alone.","The original envelope illustration is unscaled and has no manufacturer dimensions. Follow the cited public resources to the exact product, then use its current drawing and installation information for engineering work."],"readingNotes":["Identify the number and function of the selected ways.","Keep the electrical configuration linked to the manufacturer GA."],"drawingChecklist":["Reference the exact unit configuration.","Check cable interfaces and installation information.","Match the SLD ways to physical sections."],"distinction":"RMU does not specify one universal technology, dimension or combination of breaker, switch and fused ways.","facts":[{"label":"Object type","value":"Generic equipment reference"},{"label":"Dimensions","value":"Use the exact manufacturer/model drawing"},{"label":"Illustration scale","value":"Not to scale"},{"label":"Download scope","value":"Original concept envelope only"}],"references":[{"sourceId":"abb-switchgear","relevance":"Public ring-main-unit and secondary-distribution equipment families."}],"related":["disconnector","load-break-switch","earthing-switch"],"artwork":"rmu","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ring-main-unit","illustration":"https://eloragrid.ai/library/illustrations/ring-main-unit.svg"},{"slug":"transformer-envelope","name":"Transformer envelope","kind":"object","abbreviation":"Transformer GA","aliases":["transformer footprint","distribution transformer GA"],"category":"equipment-layouts","drawingTypes":["GA"],"referenceFamilies":["Manufacturer"],"summary":"A generic transformer object for locating the equipment and its documented interfaces.","description":["A transformer envelope connects a GA placement to a selected transformer and its manufacturer drawing. The physical information can include connection locations, accessories and maintenance or installation requirements, all of which depend on the product and application.","The original envelope illustration is unscaled and has no manufacturer dimensions. Follow the cited public resources to the exact product, then use its current drawing and installation information for engineering work."],"readingNotes":["Distinguish the equipment envelope from any separately documented access area.","Use the actual manufacturer view and reference orientation."],"drawingChecklist":["Reference the selected transformer GA.","Identify connection interfaces and accessories.","Link ratings to the equipment schedule."],"distinction":"An SLD transformer symbol is not a scaled footprint. A generic envelope has no model-specific dimensions.","facts":[{"label":"Object type","value":"Generic equipment reference"},{"label":"Dimensions","value":"Use the exact manufacturer/model drawing"},{"label":"Illustration scale","value":"Not to scale"},{"label":"Download scope","value":"Original concept envelope only"}],"references":[{"sourceId":"manufacturer-cad","relevance":"Official directory for transformer and distribution-equipment CAD."}],"related":["power-transformer","switchgear-panel","busbar-trunking"],"artwork":"transformer-object","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/transformer-envelope","illustration":"https://eloragrid.ai/library/illustrations/transformer-envelope.svg"},{"slug":"battery-cabinet","name":"Battery storage cabinet","kind":"object","abbreviation":"BESS cabinet","aliases":["BESS enclosure","battery cabinet","battery rack","energy storage cabinet"],"category":"microgrid-systems","drawingTypes":["GA"],"referenceFamilies":["Manufacturer"],"summary":"A generic storage-equipment envelope linked to the selected battery system.","description":["A battery cabinet contains the storage equipment defined by its product system. A BESS arrangement can also include power conversion, control and auxiliary equipment. The GA should identify those equipment boundaries rather than treat every cabinet as an identical storage block.","The original envelope illustration is unscaled and has no manufacturer dimensions. Follow the cited public resources to the exact product, then use its current drawing and installation information for engineering work."],"readingNotes":["Match the cabinet identifier to the selected system configuration.","Keep storage, conversion and control equipment distinct."],"drawingChecklist":["Reference the product and installation documentation.","Identify interfaces and specified access requirements.","Link the cabinet to system and equipment schedules."],"distinction":"A BESS cabinet is not necessarily a complete BESS. Equipment scope and installation requirements are product-specific.","facts":[{"label":"Object type","value":"Generic equipment reference"},{"label":"Dimensions","value":"Use the exact manufacturer/model drawing"},{"label":"Illustration scale","value":"Not to scale"},{"label":"Download scope","value":"Original concept envelope only"}],"references":[{"sourceId":"battery-cabinets","relevance":"Public example of battery, control and conversion equipment within a storage system."},{"sourceId":"energy-storage","relevance":"Public explanation of storage and converter interfaces."}],"related":["battery","pcs-cabinet","power-converter"],"artwork":"bess","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/battery-cabinet","illustration":"https://eloragrid.ai/library/illustrations/battery-cabinet.svg"},{"slug":"pcs-cabinet","name":"Power conversion cabinet","kind":"object","abbreviation":"PCS cabinet","aliases":["inverter cabinet","power conversion enclosure"],"category":"microgrid-systems","drawingTypes":["GA"],"referenceFamilies":["Manufacturer"],"summary":"A generic envelope for the selected power-conversion equipment and its interfaces.","description":["A PCS cabinet represents physical power-conversion equipment, such as the AC/DC interface in a battery energy storage system. It should link to the exact selected product and documented AC, DC, controls and auxiliary interfaces.","The original envelope illustration is unscaled and has no manufacturer dimensions. Follow the cited public resources to the exact product, then use its current drawing and installation information for engineering work."],"readingNotes":["Read the equipment boundary and interface labels from the system documentation.","Use manufacturer information for access, cooling and connection arrangements."],"drawingChecklist":["Identify AC and DC connection interfaces.","Reference the selected product GA.","Link controls and auxiliary-supply information."],"distinction":"A converter symbol identifies an electrical function. A PCS cabinet is physical equipment with a model-specific footprint.","facts":[{"label":"Object type","value":"Generic equipment reference"},{"label":"Dimensions","value":"Use the exact manufacturer/model drawing"},{"label":"Illustration scale","value":"Not to scale"},{"label":"Download scope","value":"Original concept envelope only"}],"references":[{"sourceId":"energy-storage","relevance":"Manufacturer description of the power-conversion role."},{"sourceId":"battery-cabinets","relevance":"Public example of a storage-system equipment arrangement."}],"related":["power-converter","battery-cabinet","battery"],"artwork":"pcs","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/pcs-cabinet","illustration":"https://eloragrid.ai/library/illustrations/pcs-cabinet.svg"},{"slug":"generator-package","name":"Generator package","kind":"object","abbreviation":"Genset GA","aliases":["generator enclosure","diesel generator package","genset footprint","generator GA"],"category":"microgrid-systems","drawingTypes":["GA"],"referenceFamilies":["Manufacturer"],"summary":"A generic generating-package envelope linked to official equipment and installation drawings.","description":["A generator package can include the electrical machine, prime mover and equipment defined by its supply scope. Its enclosure and installation interfaces depend on the selected package. The GA must therefore reference the actual product and project equipment scope.","The original envelope illustration is unscaled and has no manufacturer dimensions. Follow the cited public resources to the exact product, then use its current drawing and installation information for engineering work."],"readingNotes":["Identify which accessories are included in the represented package.","Connect the physical package reference to the electrical source on the SLD."],"drawingChecklist":["Reference the manufacturer package GA.","Identify electrical and other installation interfaces.","Link the generator and control schedules."],"distinction":"A generic generator outline does not define ventilation, exhaust, fuel, acoustic performance or service access requirements.","facts":[{"label":"Object type","value":"Generic equipment reference"},{"label":"Dimensions","value":"Use the exact manufacturer/model drawing"},{"label":"Illustration scale","value":"Not to scale"},{"label":"Download scope","value":"Original concept envelope only"}],"references":[{"sourceId":"generator-controls","relevance":"Public manufacturer generator-system and control context."},{"sourceId":"transfer-switches","relevance":"Public source-transfer system context."}],"related":["generator","transfer-switch","control-cabinet"],"artwork":"genset","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/generator-package","illustration":"https://eloragrid.ai/library/illustrations/generator-package.svg"},{"slug":"transfer-switch","name":"Transfer-switch assembly","kind":"object","abbreviation":"ATS","aliases":["automatic transfer switch","changeover assembly","source transfer switch"],"category":"microgrid-systems","drawingTypes":["GA"],"referenceFamilies":["Manufacturer"],"summary":"An equipment assembly connecting a load to the selected supply source.","description":["A transfer-switch assembly connects a load to a selected source according to its documented operating arrangement. Automatic control can monitor sources and coordinate transfer, while the equipment and application establish the transition type and operating capabilities.","The original envelope illustration is unscaled and has no manufacturer dimensions. Follow the cited public resources to the exact product, then use its current drawing and installation information for engineering work."],"readingNotes":["Identify source and load connections separately.","Read the permitted transition and control arrangement from the selected device documentation."],"drawingChecklist":["Reference the exact assembly and transition type.","Identify source and load interfaces.","Link controls, switching and equipment drawings."],"distinction":"A transfer switch and a generator paralleling system have different operating arrangements. An ATS label does not establish parallel-operation capability.","facts":[{"label":"Object type","value":"Generic equipment reference"},{"label":"Dimensions","value":"Use the exact manufacturer/model drawing"},{"label":"Illustration scale","value":"Not to scale"},{"label":"Download scope","value":"Original concept envelope only"}],"references":[{"sourceId":"transfer-switches","relevance":"Public manufacturer explanation of source-transfer functions."}],"related":["generator","circuit-breaker","switchboard"],"artwork":"ats","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/transfer-switch","illustration":"https://eloragrid.ai/library/illustrations/transfer-switch.svg"},{"slug":"control-cabinet","name":"Control / marshalling cabinet","kind":"object","abbreviation":"Control GA","aliases":["marshalling cabinet","control panel enclosure","junction cabinet","electrical enclosure"],"category":"equipment-layouts","drawingTypes":["GA"],"referenceFamilies":["Manufacturer"],"summary":"A generic cabinet organising control equipment, terminals and field interfaces.","description":["A control or marshalling cabinet houses the components and interfaces defined by its scope. A GA can show the equipment envelope, mounting surfaces, operator devices and cable interfaces. An internal layout links those objects to the schematic and wiring schedules.","The original envelope illustration is unscaled and has no manufacturer dimensions. Follow the cited public resources to the exact product, then use its current drawing and installation information for engineering work."],"readingNotes":["Identify the cabinet scope and internal equipment references.","Keep operator-facing devices aligned with their schematic identifiers."],"drawingChecklist":["Reference the enclosure and mounting arrangement.","Identify operator devices and cable interfaces.","Link terminal schedules and internal layouts."],"distinction":"A cabinet outline is not an internal wiring diagram. Enclosure properties and equipment ratings require the selected product information.","facts":[{"label":"Object type","value":"Generic equipment reference"},{"label":"Dimensions","value":"Use the exact manufacturer/model drawing"},{"label":"Illustration scale","value":"Not to scale"},{"label":"Download scope","value":"Original concept envelope only"}],"references":[{"sourceId":"enclosures","relevance":"Public enclosure construction and installation features."},{"sourceId":"mounting-plates","relevance":"Public enclosure mounting-surface references."}],"related":["terminal-strip","mounting-plate","plc-io"],"artwork":"control-cabinet","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/control-cabinet","illustration":"https://eloragrid.ai/library/illustrations/control-cabinet.svg"},{"slug":"cable-ladder","name":"Cable ladder / tray","kind":"object","abbreviation":"Cable support","aliases":["cable tray","cable support route","ladder tray","cable ladder GA"],"category":"equipment-layouts","drawingTypes":["GA"],"referenceFamilies":["Manufacturer"],"summary":"A generic route object connecting cable-support layout to the selected system.","description":["A cable-support route identifies where a selected tray or ladder system carries cables through an arrangement. Straight lengths, bends, fittings and supports belong to a manufacturer system, and their dimensions and capabilities should be documented for that selection.","The original envelope illustration is unscaled and has no manufacturer dimensions. Follow the cited public resources to the exact product, then use its current drawing and installation information for engineering work."],"readingNotes":["Read the route and changes of direction together with support and fitting information.","Distinguish cable-routing space from the physical support-system envelope."],"drawingChecklist":["Reference the selected support system.","Identify route levels, fittings and interfaces.","Link the cable and support documentation."],"distinction":"A drawn route does not establish support spacing, loading capability or installation compliance.","facts":[{"label":"Object type","value":"Generic equipment reference"},{"label":"Dimensions","value":"Use the exact manufacturer/model drawing"},{"label":"Illustration scale","value":"Not to scale"},{"label":"Download scope","value":"Original concept envelope only"}],"references":[{"sourceId":"cable-support","relevance":"Public cable ladder and tray equipment families."},{"sourceId":"cable-cad","relevance":"Official support-system CAD/BIM directory."}],"related":["busbar-trunking","switchgear-panel","control-cabinet"],"artwork":"ladder","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/cable-ladder","illustration":"https://eloragrid.ai/library/illustrations/cable-ladder.svg"},{"slug":"busbar-trunking","name":"Busbar trunking","kind":"object","abbreviation":"Busway","aliases":["bus duct","busduct","busbar trunking GA","busway"],"category":"equipment-layouts","drawingTypes":["GA"],"referenceFamilies":["Manufacturer"],"summary":"A physical enclosed distribution system with model-specific sections and fittings.","description":["Busbar trunking transports and distributes electrical power using a selected enclosed conductor system. The physical GA route can include straight sections, joints, bends and connection units defined by the manufacturer. The SLD represents the electrical connections rather than those physical details.","The original envelope illustration is unscaled and has no manufacturer dimensions. Follow the cited public resources to the exact product, then use its current drawing and installation information for engineering work."],"readingNotes":["Match the route and connection units to the selected product system.","Link physical endpoints to the electrical equipment references."],"drawingChecklist":["Reference the selected system and current product drawings.","Identify joints, fittings and connection interfaces.","Coordinate the electrical and physical endpoints."],"distinction":"An SLD busbar line is an electrical node; busbar trunking is an actual distribution assembly with defined geometry.","facts":[{"label":"Object type","value":"Generic equipment reference"},{"label":"Dimensions","value":"Use the exact manufacturer/model drawing"},{"label":"Illustration scale","value":"Not to scale"},{"label":"Download scope","value":"Original concept envelope only"}],"references":[{"sourceId":"busbar-trunking","relevance":"Public manufacturer busbar-trunking system description."},{"sourceId":"manufacturer-cad","relevance":"Official equipment CAD directory."}],"related":["busbar","switchboard","transformer-envelope"],"artwork":"busduct","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/busbar-trunking","illustration":"https://eloragrid.ai/library/illustrations/busbar-trunking.svg"},{"slug":"mounting-plate","name":"Mounting plate","kind":"object","abbreviation":"Plate","aliases":["backplate","panel mounting plate","enclosure mounting board"],"category":"equipment-layouts","drawingTypes":["GA"],"referenceFamilies":["Manufacturer"],"summary":"An enclosure mounting surface supporting the selected internal components.","description":["A mounting plate provides an installation surface within an enclosure. Its size, material, location and fitting depend on the selected enclosure system and accessories. An internal panel layout uses it to organise component placement and interface references.","The original envelope illustration is unscaled and has no manufacturer dimensions. Follow the cited public resources to the exact product, then use its current drawing and installation information for engineering work."],"readingNotes":["Read the plate position relative to the enclosure frame and doors.","Use the selected system documentation for fitting and dimensions."],"drawingChecklist":["Reference the enclosure and plate model.","Coordinate internal component placement.","Keep fixing and interface information documented."],"distinction":"A generic rectangle does not establish a fabrication size or drilling layout. Use the selected plate and component information.","facts":[{"label":"Object type","value":"Generic equipment reference"},{"label":"Dimensions","value":"Use the exact manufacturer/model drawing"},{"label":"Illustration scale","value":"Not to scale"},{"label":"Download scope","value":"Original concept envelope only"}],"references":[{"sourceId":"mounting-plates","relevance":"Public manufacturer mounting-plate accessories."}],"related":["control-cabinet","terminal-strip","plc-io"],"artwork":"mounting-plate","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/mounting-plate","illustration":"https://eloragrid.ai/library/illustrations/mounting-plate.svg"},{"slug":"terminal-strip","name":"Terminal strip assembly","kind":"object","abbreviation":"Terminal strip","aliases":["terminal rail","terminal assembly","DIN rail terminal strip"],"category":"connections-wiring","drawingTypes":["GA"],"referenceFamilies":["Manufacturer"],"summary":"A physical assembly of identified terminals and the selected connecting accessories.","description":["A terminal strip assembles connection points and accessories into an identified physical arrangement. Its schedule connects terminals to conductors, field devices and equipment. Additional links, disconnect facilities or test accessories change the assembly scope.","The original envelope illustration is unscaled and has no manufacturer dimensions. Follow the cited public resources to the exact product, then use its current drawing and installation information for engineering work."],"readingNotes":["Match physical terminal order to the terminal schedule.","Identify accessories and special-function terminals separately."],"drawingChecklist":["Reference the terminal products and accessories.","Match strip and terminal identification.","Link the schematic and wiring schedule."],"distinction":"A terminal connection symbol is an electrical reference; a terminal strip is a physical assembly with a documented arrangement.","facts":[{"label":"Object type","value":"Generic equipment reference"},{"label":"Dimensions","value":"Use the exact manufacturer/model drawing"},{"label":"Illustration scale","value":"Not to scale"},{"label":"Download scope","value":"Original concept envelope only"}],"references":[{"sourceId":"terminal-disconnect","relevance":"Public terminal product and disconnect-function information."},{"sourceId":"ct-terminals","relevance":"Public example of specialised measuring/test terminal assemblies."}],"related":["terminal","ct-test-terminal","control-cabinet"],"artwork":"terminal-strip","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/terminal-strip","illustration":"https://eloragrid.ai/library/illustrations/terminal-strip.svg"},{"slug":"1-master-element","name":"Master element","kind":"function","abbreviation":"1","aliases":["master control","master device","ANSI 1","IEEE device 1"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Starts or enables the principal operating sequence of a machine or power-system unit.","description":["Starts or enables the principal operating sequence of a machine or power-system unit.","In a drafting package, connect this reference to the start command and enabling permissives. The associated drawing should trace the unit sequence start or master-enable output; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the start command and enabling permissives.","Trace the unit sequence start or master-enable output."],"drawingChecklist":["Label the start command and enabling permissives.","Cross-reference the unit sequence start or master-enable output.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A master element initiates a sequence; device 4 is the master contactor that switches a circuit.","facts":[{"label":"ANSI / IEEE function number","value":"1"},{"label":"Drawing context","value":"The start command and enabling permissives"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["generator","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/1-master-element","illustration":"https://eloragrid.ai/library/illustrations/1-master-element.svg"},{"slug":"2-time-delay-starting-or-closing-relay","name":"Time-delay starting or closing relay","kind":"function","abbreviation":"2","aliases":["starting timer","closing timer","ANSI 2","IEEE device 2"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Introduces a deliberate interval before a starting or closing operation is permitted.","description":["Introduces a deliberate interval before a starting or closing operation is permitted.","In a drafting package, connect this reference to the initiating contact and timer supply. The associated drawing should trace the delayed start or close command; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the initiating contact and timer supply.","Trace the delayed start or close command."],"drawingChecklist":["Label the initiating contact and timer supply.","Cross-reference the delayed start or close command.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Device 2 delays starting or closing; device 62 delays a stopping or opening action.","facts":[{"label":"ANSI / IEEE function number","value":"2"},{"label":"Drawing context","value":"The initiating contact and timer supply"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["relay-coil","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/2-time-delay-starting-or-closing-relay","illustration":"https://eloragrid.ai/library/illustrations/2-time-delay-starting-or-closing-relay.svg"},{"slug":"3-checking-or-interlocking-relay","name":"Checking or interlocking relay","kind":"function","abbreviation":"3","aliases":["checking relay","interlock relay","ANSI 3","IEEE device 3"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Checks a required equipment state before the operating sequence proceeds.","description":["Checks a required equipment state before the operating sequence proceeds.","In a drafting package, connect this reference to the equipment status contacts used as permissives. The associated drawing should trace the blocked or permitted command path; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the equipment status contacts used as permissives.","Trace the blocked or permitted command path."],"drawingChecklist":["Label the equipment status contacts used as permissives.","Cross-reference the blocked or permitted command path.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"An interlock verifies a condition; a time delay by itself does not prove that condition.","facts":[{"label":"ANSI / IEEE function number","value":"3"},{"label":"Drawing context","value":"The equipment status contacts used as permissives"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["selector-switch","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/3-checking-or-interlocking-relay","illustration":"https://eloragrid.ai/library/illustrations/3-checking-or-interlocking-relay.svg"},{"slug":"4-master-contactor","name":"Master contactor","kind":"function","abbreviation":"4","aliases":["main master contactor","ANSI 4","IEEE device 4"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Switches the main control or operating circuit under the unit's master command.","description":["Switches the main control or operating circuit under the unit's master command.","In a drafting package, connect this reference to the master control coil and power contacts. The associated drawing should trace the circuit energised by the contactor; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the master control coil and power contacts.","Trace the circuit energised by the contactor."],"drawingChecklist":["Label the master control coil and power contacts.","Cross-reference the circuit energised by the contactor.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A master contactor is a switching device; the master element numbered 1 can be a control function.","facts":[{"label":"ANSI / IEEE function number","value":"4"},{"label":"Drawing context","value":"The master control coil and power contacts"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["contactor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/4-master-contactor","illustration":"https://eloragrid.ai/library/illustrations/4-master-contactor.svg"},{"slug":"5-stopping-device","name":"Stopping device","kind":"function","abbreviation":"5","aliases":["stop device","stop function","ANSI 5","IEEE device 5"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Initiates a machine or unit shutdown by removing the relevant operating permission.","description":["Initiates a machine or unit shutdown by removing the relevant operating permission.","In a drafting package, connect this reference to the stop command and normally defined state. The associated drawing should trace the shutdown path and affected contactors; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the stop command and normally defined state.","Trace the shutdown path and affected contactors."],"drawingChecklist":["Label the stop command and normally defined state.","Cross-reference the shutdown path and affected contactors.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A stopping device does not automatically provide an emergency-stop safety function.","facts":[{"label":"ANSI / IEEE function number","value":"5"},{"label":"Drawing context","value":"The stop command and normally defined state"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["emergency-stop","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/5-stopping-device","illustration":"https://eloragrid.ai/library/illustrations/5-stopping-device.svg"},{"slug":"6-starting-circuit-breaker","name":"Starting circuit breaker","kind":"function","abbreviation":"6","aliases":["starting breaker","ANSI 6","IEEE device 6"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Connects a machine to the electrical supply used during starting.","description":["Connects a machine to the electrical supply used during starting.","In a drafting package, connect this reference to the starting supply and machine connection. The associated drawing should trace the starting breaker control and status; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the starting supply and machine connection.","Trace the starting breaker control and status."],"drawingChecklist":["Label the starting supply and machine connection.","Cross-reference the starting breaker control and status.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A starting breaker serves the start arrangement; device 42 identifies the normal running connection.","facts":[{"label":"ANSI / IEEE function number","value":"6"},{"label":"Drawing context","value":"The starting supply and machine connection"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["circuit-breaker","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/6-starting-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/6-starting-circuit-breaker.svg"},{"slug":"7-rate-of-change-relay","name":"Rate-of-change relay","kind":"function","abbreviation":"7","aliases":["rate of change device","ANSI 7","IEEE device 7"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Responds to how quickly a monitored quantity changes rather than only its absolute magnitude.","description":["Responds to how quickly a monitored quantity changes rather than only its absolute magnitude.","In a drafting package, connect this reference to the measured quantity and its engineering units. The associated drawing should trace the rate-sensitive alarm or trip output; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the measured quantity and its engineering units.","Trace the rate-sensitive alarm or trip output."],"drawingChecklist":["Label the measured quantity and its engineering units.","Cross-reference the rate-sensitive alarm or trip output.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Device 7 is a general rate-of-change reference; 81R specifically denotes frequency rate of change in cited relay families.","facts":[{"label":"ANSI / IEEE function number","value":"7"},{"label":"Drawing context","value":"The measured quantity and its engineering units"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["81-frequency","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/7-rate-of-change-relay","illustration":"https://eloragrid.ai/library/illustrations/7-rate-of-change-relay.svg"},{"slug":"8-control-power-disconnecting-device","name":"Control power disconnecting device","kind":"function","abbreviation":"8","aliases":["control power disconnect","ANSI 8","IEEE device 8"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Isolates the supply feeding a control circuit or control-power bus.","description":["Isolates the supply feeding a control circuit or control-power bus.","In a drafting package, connect this reference to the control supply source and disconnect poles. The associated drawing should trace the downstream control circuits and auxiliary contacts; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the control supply source and disconnect poles.","Trace the downstream control circuits and auxiliary contacts."],"drawingChecklist":["Label the control supply source and disconnect poles.","Cross-reference the downstream control circuits and auxiliary contacts.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Control-power isolation does not by itself isolate the associated primary power circuit.","facts":[{"label":"ANSI / IEEE function number","value":"8"},{"label":"Drawing context","value":"The control supply source and disconnect poles"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["disconnector","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/8-control-power-disconnecting-device","illustration":"https://eloragrid.ai/library/illustrations/8-control-power-disconnecting-device.svg"},{"slug":"9-reversing-device","name":"Reversing device","kind":"function","abbreviation":"9","aliases":["reversing switch","reversing contactor","ANSI 9","IEEE device 9"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Changes the operating connection to reverse the direction of a machine or power circuit.","description":["Changes the operating connection to reverse the direction of a machine or power circuit.","In a drafting package, connect this reference to the forward and reverse command circuits. The associated drawing should trace the switched connections and mutual interlock; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the forward and reverse command circuits.","Trace the switched connections and mutual interlock."],"drawingChecklist":["Label the forward and reverse command circuits.","Cross-reference the switched connections and mutual interlock.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A reversing device changes the connection; a phase-sequence relay only observes the phase order.","facts":[{"label":"ANSI / IEEE function number","value":"9"},{"label":"Drawing context","value":"The forward and reverse command circuits"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["motor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/9-reversing-device","illustration":"https://eloragrid.ai/library/illustrations/9-reversing-device.svg"},{"slug":"10-unit-sequence-switch","name":"Unit sequence switch","kind":"function","abbreviation":"10","aliases":["unit sequence selector","ANSI 10","IEEE device 10"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Selects or determines the order in which multiple units enter an operating sequence.","description":["Selects or determines the order in which multiple units enter an operating sequence.","In a drafting package, connect this reference to the selected unit order and selector positions. The associated drawing should trace the unit-specific start-permission circuits; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the selected unit order and selector positions.","Trace the unit-specific start-permission circuits."],"drawingChecklist":["Label the selected unit order and selector positions.","Cross-reference the unit-specific start-permission circuits.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Unit ordering differs from device 34, which sequences the operations inside a unit or system.","facts":[{"label":"ANSI / IEEE function number","value":"10"},{"label":"Drawing context","value":"The selected unit order and selector positions"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["selector-switch","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/10-unit-sequence-switch","illustration":"https://eloragrid.ai/library/illustrations/10-unit-sequence-switch.svg"},{"slug":"11-multifunction-device","name":"Multifunction device","kind":"function","abbreviation":"11","aliases":["multifunction relay","multiple function device","ANSI 11","IEEE device 11"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Identifies a device that performs several separately described protection or control functions.","description":["Identifies a device that performs several separately described protection or control functions.","In a drafting package, connect this reference to the device's enabled-function list. The associated drawing should trace the function-specific outputs and terminal references; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the device's enabled-function list.","Trace the function-specific outputs and terminal references."],"drawingChecklist":["Label the device's enabled-function list.","Cross-reference the function-specific outputs and terminal references.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"The number 11 does not reveal which protection elements are enabled; show their individual codes as well.","facts":[{"label":"ANSI / IEEE function number","value":"11"},{"label":"Drawing context","value":"The device's enabled-function list"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["control-cabinet","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/11-multifunction-device","illustration":"https://eloragrid.ai/library/illustrations/11-multifunction-device.svg"},{"slug":"12-overspeed-device","name":"Overspeed device","kind":"function","abbreviation":"12","aliases":["overspeed relay","high speed protection","ANSI 12","IEEE device 12"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Responds when machine speed exceeds the documented operating criterion.","description":["Responds when machine speed exceeds the documented operating criterion.","In a drafting package, connect this reference to the speed sensor and shaft or machine identity. The associated drawing should trace the overspeed shutdown or alarm path; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the speed sensor and shaft or machine identity.","Trace the overspeed shutdown or alarm path."],"drawingChecklist":["Label the speed sensor and shaft or machine identity.","Cross-reference the overspeed shutdown or alarm path.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Electrical frequency can relate to speed, but an 81 element is not universally equivalent to mechanical overspeed protection.","facts":[{"label":"ANSI / IEEE function number","value":"12"},{"label":"Drawing context","value":"The speed sensor and shaft or machine identity"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["generator","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/12-overspeed-device","illustration":"https://eloragrid.ai/library/illustrations/12-overspeed-device.svg"},{"slug":"13-synchronous-speed-device","name":"Synchronous-speed device","kind":"function","abbreviation":"13","aliases":["synchronous speed relay","ANSI 13","IEEE device 13"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Recognises a speed condition associated with synchronism during a machine sequence.","description":["Recognises a speed condition associated with synchronism during a machine sequence.","In a drafting package, connect this reference to the speed reference and synchronous-speed criterion. The associated drawing should trace the next-step permission in the start sequence; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the speed reference and synchronous-speed criterion.","Trace the next-step permission in the start sequence."],"drawingChecklist":["Label the speed reference and synchronous-speed criterion.","Cross-reference the next-step permission in the start sequence.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Recognising synchronous speed does not demonstrate the voltage and phase conditions checked by device 25.","facts":[{"label":"ANSI / IEEE function number","value":"13"},{"label":"Drawing context","value":"The speed reference and synchronous-speed criterion"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["motor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/13-synchronous-speed-device","illustration":"https://eloragrid.ai/library/illustrations/13-synchronous-speed-device.svg"},{"slug":"14-underspeed-device","name":"Underspeed device","kind":"function","abbreviation":"14","aliases":["underspeed relay","low speed protection","ANSI 14","IEEE device 14"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Responds to machine speed below the required operating level.","description":["Responds to machine speed below the required operating level.","In a drafting package, connect this reference to the speed input and start-up supervision logic. The associated drawing should trace the underspeed alarm or stopping circuit; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the speed input and start-up supervision logic.","Trace the underspeed alarm or stopping circuit."],"drawingChecklist":["Label the speed input and start-up supervision logic.","Cross-reference the underspeed alarm or stopping circuit.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"An underspeed element measures rotation; low electrical frequency is a different measured quantity.","facts":[{"label":"ANSI / IEEE function number","value":"14"},{"label":"Drawing context","value":"The speed input and start-up supervision logic"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["motor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/14-underspeed-device","illustration":"https://eloragrid.ai/library/illustrations/14-underspeed-device.svg"},{"slug":"15-speed-or-frequency-matching-device","name":"Speed or frequency matching device","kind":"function","abbreviation":"15","aliases":["speed matching","frequency matching","ANSI 15","IEEE device 15"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Adjusts or supervises the difference between two speed or frequency references.","description":["Adjusts or supervises the difference between two speed or frequency references.","In a drafting package, connect this reference to the two references being compared. The associated drawing should trace the governor or matching command; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the two references being compared.","Trace the governor or matching command."],"drawingChecklist":["Label the two references being compared.","Cross-reference the governor or matching command.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Matching speed or frequency is one aspect of synchronisation and does not replace the complete synchronism check.","facts":[{"label":"ANSI / IEEE function number","value":"15"},{"label":"Drawing context","value":"The two references being compared"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["25-synchronism-check","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/15-speed-or-frequency-matching-device","illustration":"https://eloragrid.ai/library/illustrations/15-speed-or-frequency-matching-device.svg"},{"slug":"16-data-communications-device","name":"Data communications device","kind":"function","abbreviation":"16","aliases":["communication device","communications equipment","ANSI 16","IEEE device 16"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Identifies equipment carrying data between control, protection or monitoring devices.","description":["Identifies equipment carrying data between control, protection or monitoring devices.","In a drafting package, connect this reference to the communication medium and connected endpoints. The associated drawing should trace the network ports, link identifiers and architecture drawing; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the communication medium and connected endpoints.","Trace the network ports, link identifiers and architecture drawing."],"drawingChecklist":["Label the communication medium and connected endpoints.","Cross-reference the network ports, link identifiers and architecture drawing.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Device 16 describes the communication role; its suffix and network legend determine whether the item is a switch, router or other device.","facts":[{"label":"ANSI / IEEE function number","value":"16"},{"label":"Drawing context","value":"The communication medium and connected endpoints"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["plc-io","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/16-data-communications-device","illustration":"https://eloragrid.ai/library/illustrations/16-data-communications-device.svg"},{"slug":"17-shunting-or-discharge-switch","name":"Shunting or discharge switch","kind":"function","abbreviation":"17","aliases":["shunt switch","discharge switch","ANSI 17","IEEE device 17"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Changes a circuit connection to bypass a component or provide a discharge path.","description":["Changes a circuit connection to bypass a component or provide a discharge path.","In a drafting package, connect this reference to the component bypassed or discharged. The associated drawing should trace the switched path and required interlocks; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the component bypassed or discharged.","Trace the switched path and required interlocks."],"drawingChecklist":["Label the component bypassed or discharged.","Cross-reference the switched path and required interlocks.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A discharge path is not automatically an earthing path; show the actual circuit connection.","facts":[{"label":"ANSI / IEEE function number","value":"17"},{"label":"Drawing context","value":"The component bypassed or discharged"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["resistor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/17-shunting-or-discharge-switch","illustration":"https://eloragrid.ai/library/illustrations/17-shunting-or-discharge-switch.svg"},{"slug":"18-accelerating-or-decelerating-device","name":"Accelerating or decelerating device","kind":"function","abbreviation":"18","aliases":["acceleration controller","deceleration device","ANSI 18","IEEE device 18"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Controls a machine action that changes its operating speed during a sequence.","description":["Controls a machine action that changes its operating speed during a sequence.","In a drafting package, connect this reference to the acceleration or deceleration command. The associated drawing should trace the drive, starter or governor interface; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the acceleration or deceleration command.","Trace the drive, starter or governor interface."],"drawingChecklist":["Label the acceleration or deceleration command.","Cross-reference the drive, starter or governor interface.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"The speed-changing action differs from the speed limit supervision provided by devices 12 and 14.","facts":[{"label":"ANSI / IEEE function number","value":"18"},{"label":"Drawing context","value":"The acceleration or deceleration command"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["motor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/18-accelerating-or-decelerating-device","illustration":"https://eloragrid.ai/library/illustrations/18-accelerating-or-decelerating-device.svg"},{"slug":"19-starting-to-running-transition-contactor","name":"Starting-to-running transition contactor","kind":"function","abbreviation":"19","aliases":["transition contactor","start run contactor","ANSI 19","IEEE device 19"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Changes the machine connection from its starting arrangement to its running arrangement.","description":["Changes the machine connection from its starting arrangement to its running arrangement.","In a drafting package, connect this reference to the starting and running power connections. The associated drawing should trace the transition coil and interlocked contactors; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the starting and running power connections.","Trace the transition coil and interlocked contactors."],"drawingChecklist":["Label the starting and running power connections.","Cross-reference the transition coil and interlocked contactors.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A transition contactor changes the starting arrangement; it is not a generic reversing contactor.","facts":[{"label":"ANSI / IEEE function number","value":"19"},{"label":"Drawing context","value":"The starting and running power connections"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["contactor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/19-starting-to-running-transition-contactor","illustration":"https://eloragrid.ai/library/illustrations/19-starting-to-running-transition-contactor.svg"},{"slug":"20-electrically-operated-valve","name":"Electrically operated valve","kind":"function","abbreviation":"20","aliases":["solenoid valve","motor operated valve","ANSI 20","IEEE device 20"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Commands a valve through an electrical actuator or solenoid.","description":["Commands a valve through an electrical actuator or solenoid.","In a drafting package, connect this reference to the valve tag, actuator supply and command terminals. The associated drawing should trace the process action and valve position feedback; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the valve tag, actuator supply and command terminals.","Trace the process action and valve position feedback."],"drawingChecklist":["Label the valve tag, actuator supply and command terminals.","Cross-reference the process action and valve position feedback.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"An electrically operated valve is an actuator; pressure and flow supervision use separate sensor functions.","facts":[{"label":"ANSI / IEEE function number","value":"20"},{"label":"Drawing context","value":"The valve tag, actuator supply and command terminals"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["relay-coil","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/20-electrically-operated-valve","illustration":"https://eloragrid.ai/library/illustrations/20-electrically-operated-valve.svg"},{"slug":"21-distance-protection","name":"Distance protection","kind":"function","abbreviation":"21","aliases":["distance relay","impedance relay","ANSI 21","IEEE device 21"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Uses measured voltage and current to assess an electrical distance or impedance characteristic.","description":["Uses measured voltage and current to assess an electrical distance or impedance characteristic.","In a drafting package, connect this reference to the protected line CT and VT circuits. The associated drawing should trace the distance zones and associated breaker trip paths; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the protected line CT and VT circuits.","Trace the distance zones and associated breaker trip paths."],"drawingChecklist":["Label the protected line CT and VT circuits.","Cross-reference the distance zones and associated breaker trip paths.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Distance protection uses impedance-related criteria; directional overcurrent 67 uses current and directional supervision.","facts":[{"label":"ANSI / IEEE function number","value":"21"},{"label":"Drawing context","value":"The protected line CT and VT circuits"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["current-transformer","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/21-distance-protection","illustration":"https://eloragrid.ai/library/illustrations/21-distance-protection.svg"},{"slug":"22-equalizer-circuit-breaker","name":"Equalizer circuit breaker","kind":"function","abbreviation":"22","aliases":["equalizer breaker","equalising breaker","ANSI 22","IEEE device 22"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Switches an equalising connection used in a machine or generator arrangement.","description":["Switches an equalising connection used in a machine or generator arrangement.","In a drafting package, connect this reference to the equaliser conductors and connected machines. The associated drawing should trace the breaker operating and interlocking circuits; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.","This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design."],"readingNotes":["Identify the equaliser conductors and connected machines.","Trace the breaker operating and interlocking circuits."],"drawingChecklist":["Label the equaliser conductors and connected machines.","Cross-reference the breaker operating and interlocking circuits.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"The equalising connection has a specific system purpose; do not infer a bus-coupler application solely from the number.","facts":[{"label":"ANSI / IEEE function number","value":"22"},{"label":"Drawing context","value":"The equaliser conductors and connected machines"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["circuit-breaker","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/22-equalizer-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/22-equalizer-circuit-breaker.svg"},{"slug":"23-temperature-control-device","name":"Temperature control device","kind":"function","abbreviation":"23","aliases":["temperature controller","thermostatic control","ANSI 23","IEEE device 23"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Controls heating, cooling or another process action using a temperature input.","description":["Controls heating, cooling or another process action using a temperature input.","In a drafting package, connect this reference to the temperature sensor and controlled equipment. The associated drawing should trace the heating, cooling or regulating output; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the temperature sensor and controlled equipment.","Trace the heating, cooling or regulating output."],"drawingChecklist":["Label the temperature sensor and controlled equipment.","Cross-reference the heating, cooling or regulating output.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Temperature control maintains a process condition; thermal protection 49 addresses the protected equipment's thermal duty.","facts":[{"label":"ANSI / IEEE function number","value":"23"},{"label":"Drawing context","value":"The temperature sensor and controlled equipment"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["control-cabinet","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/23-temperature-control-device","illustration":"https://eloragrid.ai/library/illustrations/23-temperature-control-device.svg"},{"slug":"24-overexcitation-protection","name":"Overexcitation protection","kind":"function","abbreviation":"24","aliases":["volts per hertz","V per Hz","V/Hz protection","ANSI 24","IEEE device 24"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Supervises the voltage-to-frequency relationship associated with magnetic overexcitation.","description":["Supervises the voltage-to-frequency relationship associated with magnetic overexcitation.","In a drafting package, connect this reference to the VT inputs and frequency reference. The associated drawing should trace the transformer or generator protection output; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the VT inputs and frequency reference.","Trace the transformer or generator protection output."],"drawingChecklist":["Label the VT inputs and frequency reference.","Cross-reference the transformer or generator protection output.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A voltage-to-frequency element differs from overvoltage 59 because frequency changes affect its criterion.","facts":[{"label":"ANSI / IEEE function number","value":"24"},{"label":"Drawing context","value":"The VT inputs and frequency reference"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["power-transformer","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/24-overexcitation-protection","illustration":"https://eloragrid.ai/library/illustrations/24-overexcitation-protection.svg"},{"slug":"26-apparatus-thermal-device","name":"Apparatus thermal device","kind":"function","abbreviation":"26","aliases":["thermal switch","equipment thermal device","ANSI 26","IEEE device 26"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Responds to the temperature of equipment or a monitored part of that equipment.","description":["Responds to the temperature of equipment or a monitored part of that equipment.","In a drafting package, connect this reference to the thermal sensor location and contact type. The associated drawing should trace the alarm, trip or cooling-control destination; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the thermal sensor location and contact type.","Trace the alarm, trip or cooling-control destination."],"drawingChecklist":["Label the thermal sensor location and contact type.","Cross-reference the alarm, trip or cooling-control destination.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"An apparatus thermal device can be a direct sensor or switch; a 49 function may instead use a calculated thermal model.","facts":[{"label":"ANSI / IEEE function number","value":"26"},{"label":"Drawing context","value":"The thermal sensor location and contact type"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["49-thermal-protection","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/26-apparatus-thermal-device","illustration":"https://eloragrid.ai/library/illustrations/26-apparatus-thermal-device.svg"},{"slug":"28-flame-detector","name":"Flame detector","kind":"function","abbreviation":"28","aliases":["flame monitor","burner flame detector","ANSI 28","IEEE device 28"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Provides electrical indication that combustion flame is present or absent.","description":["Provides electrical indication that combustion flame is present or absent.","In a drafting package, connect this reference to the burner or combustion equipment and detector supply. The associated drawing should trace the flame-proven permissive and fuel shutdown chain; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the burner or combustion equipment and detector supply.","Trace the flame-proven permissive and fuel shutdown chain."],"drawingChecklist":["Label the burner or combustion equipment and detector supply.","Cross-reference the flame-proven permissive and fuel shutdown chain.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A flame detector supervises combustion; it is not a smoke detector or electrical arc-flash sensor.","facts":[{"label":"ANSI / IEEE function number","value":"28"},{"label":"Drawing context","value":"The burner or combustion equipment and detector supply"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["generator-package","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/28-flame-detector","illustration":"https://eloragrid.ai/library/illustrations/28-flame-detector.svg"},{"slug":"29-isolating-contactor","name":"Isolating contactor","kind":"function","abbreviation":"29","aliases":["isolation contactor","ANSI 29","IEEE device 29"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Provides a contactor-operated disconnection within a machine or power circuit.","description":["Provides a contactor-operated disconnection within a machine or power circuit.","In a drafting package, connect this reference to the isolation contactor poles and coil supply. The associated drawing should trace the circuit boundary and interlocked status contacts; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the isolation contactor poles and coil supply.","Trace the circuit boundary and interlocked status contacts."],"drawingChecklist":["Label the isolation contactor poles and coil supply.","Cross-reference the circuit boundary and interlocked status contacts.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A contactor used for isolation has to be selected for that duty; the number alone establishes no safe-isolation rating.","facts":[{"label":"ANSI / IEEE function number","value":"29"},{"label":"Drawing context","value":"The isolation contactor poles and coil supply"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["contactor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/29-isolating-contactor","illustration":"https://eloragrid.ai/library/illustrations/29-isolating-contactor.svg"},{"slug":"30-annunciator-relay","name":"Annunciator relay","kind":"function","abbreviation":"30","aliases":["annunciator","alarm annunciation","ANSI 30","IEEE device 30"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Operates an indication system that presents a detected condition to the operator.","description":["Operates an indication system that presents a detected condition to the operator.","In a drafting package, connect this reference to the individual alarm inputs and acknowledgement/reset paths. The associated drawing should trace the annunciator window, horn or common alarm output; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the individual alarm inputs and acknowledgement/reset paths.","Trace the annunciator window, horn or common alarm output."],"drawingChecklist":["Label the individual alarm inputs and acknowledgement/reset paths.","Cross-reference the annunciator window, horn or common alarm output.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Annunciation presents a condition; a separate trip relay may act on the same condition.","facts":[{"label":"ANSI / IEEE function number","value":"30"},{"label":"Drawing context","value":"The individual alarm inputs and acknowledgement/reset paths"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["indicator-lamp","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/30-annunciator-relay","illustration":"https://eloragrid.ai/library/illustrations/30-annunciator-relay.svg"},{"slug":"31-separate-excitation-device","name":"Separate excitation device","kind":"function","abbreviation":"31","aliases":["separate excitation","excitation connection device","ANSI 31","IEEE device 31"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Connects or controls a separately supplied excitation arrangement for a machine.","description":["Connects or controls a separately supplied excitation arrangement for a machine.","In a drafting package, connect this reference to the separate excitation supply and machine field connection. The associated drawing should trace the excitation switching command and sequence references; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.","This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design."],"readingNotes":["Identify the separate excitation supply and machine field connection.","Trace the excitation switching command and sequence references."],"drawingChecklist":["Label the separate excitation supply and machine field connection.","Cross-reference the excitation switching command and sequence references.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"This specialist machine-control reference should be interpreted with the excitation drawing; device 41 identifies a field breaker.","facts":[{"label":"ANSI / IEEE function number","value":"31"},{"label":"Drawing context","value":"The separate excitation supply and machine field connection"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["generator","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/31-separate-excitation-device","illustration":"https://eloragrid.ai/library/illustrations/31-separate-excitation-device.svg"},{"slug":"33-position-switch","name":"Position switch","kind":"function","abbreviation":"33","aliases":["limit switch","position limit contact","ANSI 33","IEEE device 33"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Changes an electrical indication when a mechanism reaches a defined physical position.","description":["Changes an electrical indication when a mechanism reaches a defined physical position.","In a drafting package, connect this reference to the mechanism position and contact's normal-state convention. The associated drawing should trace the position indication and permissive circuits; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the mechanism position and contact's normal-state convention.","Trace the position indication and permissive circuits."],"drawingChecklist":["Label the mechanism position and contact's normal-state convention.","Cross-reference the position indication and permissive circuits.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A position switch identifies position, not necessarily that an electrically commanded operation has succeeded.","facts":[{"label":"ANSI / IEEE function number","value":"33"},{"label":"Drawing context","value":"The mechanism position and contact's normal-state convention"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["normally-open-contact","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/33-position-switch","illustration":"https://eloragrid.ai/library/illustrations/33-position-switch.svg"},{"slug":"34-master-sequence-device","name":"Master sequence device","kind":"function","abbreviation":"34","aliases":["master sequencer","sequence controller","ANSI 34","IEEE device 34"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Coordinates the steps of a machine or switching sequence.","description":["Coordinates the steps of a machine or switching sequence.","In a drafting package, connect this reference to the sequence step inputs and transition conditions. The associated drawing should trace the step outputs and unit sequence diagram; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the sequence step inputs and transition conditions.","Trace the step outputs and unit sequence diagram."],"drawingChecklist":["Label the sequence step inputs and transition conditions.","Cross-reference the step outputs and unit sequence diagram.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A master sequence device sequences operations; device 10 determines the order of multiple units.","facts":[{"label":"ANSI / IEEE function number","value":"34"},{"label":"Drawing context","value":"The sequence step inputs and transition conditions"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["plc-io","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/34-master-sequence-device","illustration":"https://eloragrid.ai/library/illustrations/34-master-sequence-device.svg"},{"slug":"35-brush-operating-or-slip-ring-short-circuiting-device","name":"Brush-operating or slip-ring short-circuiting device","kind":"function","abbreviation":"35","aliases":["brush lifting device","slip ring shorting device","ANSI 35","IEEE device 35"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Changes the brush or slip-ring arrangement as part of a wound-rotor machine sequence.","description":["Changes the brush or slip-ring arrangement as part of a wound-rotor machine sequence.","In a drafting package, connect this reference to the brush mechanism and slip-ring circuit. The associated drawing should trace the mechanism drive and proof-of-position contacts; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.","This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design."],"readingNotes":["Identify the brush mechanism and slip-ring circuit.","Trace the mechanism drive and proof-of-position contacts."],"drawingChecklist":["Label the brush mechanism and slip-ring circuit.","Cross-reference the mechanism drive and proof-of-position contacts.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"This is a specialist wound-rotor machine function, not a general terminal shorting link.","facts":[{"label":"ANSI / IEEE function number","value":"35"},{"label":"Drawing context","value":"The brush mechanism and slip-ring circuit"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["motor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/35-brush-operating-or-slip-ring-short-circuiting-device","illustration":"https://eloragrid.ai/library/illustrations/35-brush-operating-or-slip-ring-short-circuiting-device.svg"},{"slug":"36-polarity-device","name":"Polarity device","kind":"function","abbreviation":"36","aliases":["polarity relay","polarising device","ANSI 36","IEEE device 36"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Supervises or establishes a required electrical polarity condition.","description":["Supervises or establishes a required electrical polarity condition.","In a drafting package, connect this reference to the DC or polarising circuit and defined polarity. The associated drawing should trace the polarity-dependent permission or correction path; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the DC or polarising circuit and defined polarity.","Trace the polarity-dependent permission or correction path."],"drawingChecklist":["Label the DC or polarising circuit and defined polarity.","Cross-reference the polarity-dependent permission or correction path.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Polarity supervision differs from AC phase-sequence supervision; identify the actual measured circuit.","facts":[{"label":"ANSI / IEEE function number","value":"36"},{"label":"Drawing context","value":"The DC or polarising circuit and defined polarity"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["battery","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/36-polarity-device","illustration":"https://eloragrid.ai/library/illustrations/36-polarity-device.svg"},{"slug":"37-undercurrent-or-underpower-protection","name":"Undercurrent or underpower protection","kind":"function","abbreviation":"37","aliases":["undercurrent relay","underpower relay","loss of load","ANSI 37","IEEE device 37"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Recognises a current or power level below the documented minimum operating criterion.","description":["Recognises a current or power level below the documented minimum operating criterion.","In a drafting package, connect this reference to the measured current or power and running-state supervision. The associated drawing should trace the underload alarm or machine stopping path; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the measured current or power and running-state supervision.","Trace the underload alarm or machine stopping path."],"drawingChecklist":["Label the measured current or power and running-state supervision.","Cross-reference the underload alarm or machine stopping path.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"An underload reference must state its measured quantity; device 32 describes directional power rather than a generic low-current condition.","facts":[{"label":"ANSI / IEEE function number","value":"37"},{"label":"Drawing context","value":"The measured current or power and running-state supervision"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["motor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/37-undercurrent-or-underpower-protection","illustration":"https://eloragrid.ai/library/illustrations/37-undercurrent-or-underpower-protection.svg"},{"slug":"38-bearing-protective-device","name":"Bearing protective device","kind":"function","abbreviation":"38","aliases":["bearing protection","bearing temperature relay","ANSI 38","IEEE device 38"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Supervises an abnormal condition at a machine bearing, often using temperature or mechanical sensing.","description":["Supervises an abnormal condition at a machine bearing, often using temperature or mechanical sensing.","In a drafting package, connect this reference to the bearing identity and sensor type. The associated drawing should trace the bearing alarm or machine trip destination; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the bearing identity and sensor type.","Trace the bearing alarm or machine trip destination."],"drawingChecklist":["Label the bearing identity and sensor type.","Cross-reference the bearing alarm or machine trip destination.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Bearing protection is tied to a monitored bearing; winding thermal protection addresses a different equipment location.","facts":[{"label":"ANSI / IEEE function number","value":"38"},{"label":"Drawing context","value":"The bearing identity and sensor type"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["motor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/38-bearing-protective-device","illustration":"https://eloragrid.ai/library/illustrations/38-bearing-protective-device.svg"},{"slug":"39-mechanical-condition-monitor","name":"Mechanical condition monitor","kind":"function","abbreviation":"39","aliases":["vibration monitor","mechanical monitoring","ANSI 39","IEEE device 39"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Converts a monitored mechanical condition into an electrical alarm or protection signal.","description":["Converts a monitored mechanical condition into an electrical alarm or protection signal.","In a drafting package, connect this reference to the mechanical sensor and measurement channel. The associated drawing should trace the monitor output and machine shutdown logic; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the mechanical sensor and measurement channel.","Trace the monitor output and machine shutdown logic."],"drawingChecklist":["Label the mechanical sensor and measurement channel.","Cross-reference the monitor output and machine shutdown logic.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Mechanical monitoring is not electrical current-unbalance protection, even when both protect the same machine.","facts":[{"label":"ANSI / IEEE function number","value":"39"},{"label":"Drawing context","value":"The mechanical sensor and measurement channel"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["generator-package","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/39-mechanical-condition-monitor","illustration":"https://eloragrid.ai/library/illustrations/39-mechanical-condition-monitor.svg"},{"slug":"40-field-or-loss-of-excitation-protection","name":"Field or loss-of-excitation protection","kind":"function","abbreviation":"40","aliases":["loss of field","loss of excitation","underexcitation","ANSI 40","IEEE device 40"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Detects an abnormal machine excitation condition using the implementation's field or electrical measurements.","description":["Detects an abnormal machine excitation condition using the implementation's field or electrical measurements.","In a drafting package, connect this reference to the machine measurements and excitation reference. The associated drawing should trace the excitation alarm or generator trip path; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the machine measurements and excitation reference.","Trace the excitation alarm or generator trip path."],"drawingChecklist":["Label the machine measurements and excitation reference.","Cross-reference the excitation alarm or generator trip path.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Loss-of-excitation protection supervises a condition; device 41 switches the field circuit.","facts":[{"label":"ANSI / IEEE function number","value":"40"},{"label":"Drawing context","value":"The machine measurements and excitation reference"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["generator","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/40-field-or-loss-of-excitation-protection","illustration":"https://eloragrid.ai/library/illustrations/40-field-or-loss-of-excitation-protection.svg"},{"slug":"41-field-circuit-breaker","name":"Field circuit breaker","kind":"function","abbreviation":"41","aliases":["field breaker","field switch","ANSI 41","IEEE device 41"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Applies or removes the electrical connection to a machine field circuit.","description":["Applies or removes the electrical connection to a machine field circuit.","In a drafting package, connect this reference to the excitation source, field winding and discharge arrangement. The associated drawing should trace the field breaker trip/close circuits and status; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the excitation source, field winding and discharge arrangement.","Trace the field breaker trip/close circuits and status."],"drawingChecklist":["Label the excitation source, field winding and discharge arrangement.","Cross-reference the field breaker trip/close circuits and status.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A field breaker switches the excitation circuit; the generator's main AC breaker normally carries a separate 52 designation.","facts":[{"label":"ANSI / IEEE function number","value":"41"},{"label":"Drawing context","value":"The excitation source, field winding and discharge arrangement"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["generator","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/41-field-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/41-field-circuit-breaker.svg"},{"slug":"42-running-circuit-breaker","name":"Running circuit breaker","kind":"function","abbreviation":"42","aliases":["running breaker","run contactor","ANSI 42","IEEE device 42"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Connects a machine to the supply or connection used for normal running.","description":["Connects a machine to the supply or connection used for normal running.","In a drafting package, connect this reference to the normal operating supply and machine terminals. The associated drawing should trace the running connection and start/run interlocks; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the normal operating supply and machine terminals.","Trace the running connection and start/run interlocks."],"drawingChecklist":["Label the normal operating supply and machine terminals.","Cross-reference the running connection and start/run interlocks.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"The running connection may be distinct from the starting circuit numbered 6.","facts":[{"label":"ANSI / IEEE function number","value":"42"},{"label":"Drawing context","value":"The normal operating supply and machine terminals"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["motor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/42-running-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/42-running-circuit-breaker.svg"},{"slug":"43-manual-transfer-or-selector-device","name":"Manual transfer or selector device","kind":"function","abbreviation":"43","aliases":["manual transfer switch","manual selector","ANSI 43","IEEE device 43"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Selects an operating circuit, control source or mode through a manual action.","description":["Selects an operating circuit, control source or mode through a manual action.","In a drafting package, connect this reference to the selector positions and selected circuit names. The associated drawing should trace the manual selection contacts and controlled destinations; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the selector positions and selected circuit names.","Trace the manual selection contacts and controlled destinations."],"drawingChecklist":["Label the selector positions and selected circuit names.","Cross-reference the manual selection contacts and controlled destinations.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Manual selection 43 is distinct from automatic selective transfer logic numbered 83.","facts":[{"label":"ANSI / IEEE function number","value":"43"},{"label":"Drawing context","value":"The selector positions and selected circuit names"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["selector-switch","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/43-manual-transfer-or-selector-device","illustration":"https://eloragrid.ai/library/illustrations/43-manual-transfer-or-selector-device.svg"},{"slug":"44-unit-sequence-starting-relay","name":"Unit sequence starting relay","kind":"function","abbreviation":"44","aliases":["sequence starting relay","ANSI 44","IEEE device 44"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Starts the next unit or operating step when the documented sequence condition is met.","description":["Starts the next unit or operating step when the documented sequence condition is met.","In a drafting package, connect this reference to the preceding unit status and sequence permissives. The associated drawing should trace the next unit's starting circuit; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the preceding unit status and sequence permissives.","Trace the next unit's starting circuit."],"drawingChecklist":["Label the preceding unit status and sequence permissives.","Cross-reference the next unit's starting circuit.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A unit sequence starting relay advances a defined sequence; it does not identify the entire master sequencer.","facts":[{"label":"ANSI / IEEE function number","value":"44"},{"label":"Drawing context","value":"The preceding unit status and sequence permissives"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["relay-coil","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/44-unit-sequence-starting-relay","illustration":"https://eloragrid.ai/library/illustrations/44-unit-sequence-starting-relay.svg"},{"slug":"45-atmospheric-condition-monitor","name":"Atmospheric condition monitor","kind":"function","abbreviation":"45","aliases":["environmental condition monitor","atmospheric monitor","ANSI 45","IEEE device 45"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Reports an ambient atmospheric condition relevant to equipment operation.","description":["Reports an ambient atmospheric condition relevant to equipment operation.","In a drafting package, connect this reference to the ambient sensor, location and measured parameter. The associated drawing should trace the environmental alarm or operating permission; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the ambient sensor, location and measured parameter.","Trace the environmental alarm or operating permission."],"drawingChecklist":["Label the ambient sensor, location and measured parameter.","Cross-reference the environmental alarm or operating permission.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"The number is a broad environmental function; the legend must identify humidity, smoke, gas or another actual parameter.","facts":[{"label":"ANSI / IEEE function number","value":"45"},{"label":"Drawing context","value":"The ambient sensor, location and measured parameter"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["control-cabinet","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/45-atmospheric-condition-monitor","illustration":"https://eloragrid.ai/library/illustrations/45-atmospheric-condition-monitor.svg"},{"slug":"47-phase-sequence-or-voltage-balance-protection","name":"Phase-sequence or voltage-balance protection","kind":"function","abbreviation":"47","aliases":["phase sequence relay","voltage balance","voltage unbalance","ANSI 47","IEEE device 47"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Supervises phase order or voltage imbalance using the selected device's voltage inputs.","description":["Supervises phase order or voltage imbalance using the selected device's voltage inputs.","In a drafting package, connect this reference to the three-phase voltage measurement circuit. The associated drawing should trace the phase-order or imbalance alarm/trip destination; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the three-phase voltage measurement circuit.","Trace the phase-order or imbalance alarm/trip destination."],"drawingChecklist":["Label the three-phase voltage measurement circuit.","Cross-reference the phase-order or imbalance alarm/trip destination.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Voltage-based supervision 47 differs from current-unbalance function 46.","facts":[{"label":"ANSI / IEEE function number","value":"47"},{"label":"Drawing context","value":"The three-phase voltage measurement circuit"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["voltage-transformer","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/47-phase-sequence-or-voltage-balance-protection","illustration":"https://eloragrid.ai/library/illustrations/47-phase-sequence-or-voltage-balance-protection.svg"},{"slug":"48-incomplete-sequence-relay","name":"Incomplete-sequence relay","kind":"function","abbreviation":"48","aliases":["incomplete sequence","long start protection","ANSI 48","IEEE device 48"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Detects that an operating or starting sequence has not completed as required.","description":["Detects that an operating or starting sequence has not completed as required.","In a drafting package, connect this reference to the start/sequence initiation and completion indications. The associated drawing should trace the timeout alarm and stopping or reset circuit; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the start/sequence initiation and completion indications.","Trace the timeout alarm and stopping or reset circuit."],"drawingChecklist":["Label the start/sequence initiation and completion indications.","Cross-reference the timeout alarm and stopping or reset circuit.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Incomplete sequence supervision checks completion; a starts-per-hour limit is a separate 66 application.","facts":[{"label":"ANSI / IEEE function number","value":"48"},{"label":"Drawing context","value":"The start/sequence initiation and completion indications"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["motor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/48-incomplete-sequence-relay","illustration":"https://eloragrid.ai/library/illustrations/48-incomplete-sequence-relay.svg"},{"slug":"53-exciter-or-dc-generator-relay","name":"Exciter or DC generator relay","kind":"function","abbreviation":"53","aliases":["exciter relay","DC generator relay","ANSI 53","IEEE device 53"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Supervises an exciter or DC generator condition in a machine control arrangement.","description":["Supervises an exciter or DC generator condition in a machine control arrangement.","In a drafting package, connect this reference to the exciter or DC generator measurement connections. The associated drawing should trace the excitation-control sequence and protection outputs; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.","This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design."],"readingNotes":["Identify the exciter or DC generator measurement connections.","Trace the excitation-control sequence and protection outputs."],"drawingChecklist":["Label the exciter or DC generator measurement connections.","Cross-reference the excitation-control sequence and protection outputs.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"This specialist reference does not itself identify which voltage, current or build-up condition the selected relay checks.","facts":[{"label":"ANSI / IEEE function number","value":"53"},{"label":"Drawing context","value":"The exciter or DC generator measurement connections"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["generator","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/53-exciter-or-dc-generator-relay","illustration":"https://eloragrid.ai/library/illustrations/53-exciter-or-dc-generator-relay.svg"},{"slug":"54-turning-gear-engaging-device","name":"Turning-gear engaging device","kind":"function","abbreviation":"54","aliases":["turning gear","turning gear engagement","ANSI 54","IEEE device 54"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Controls engagement of the turning gear used to rotate a large machine at low speed.","description":["Controls engagement of the turning gear used to rotate a large machine at low speed.","In a drafting package, connect this reference to the turning-gear mechanism and speed/interlock signals. The associated drawing should trace the engagement actuator and proof-of-position circuit; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.","This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design."],"readingNotes":["Identify the turning-gear mechanism and speed/interlock signals.","Trace the engagement actuator and proof-of-position circuit."],"drawingChecklist":["Label the turning-gear mechanism and speed/interlock signals.","Cross-reference the engagement actuator and proof-of-position circuit.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Turning-gear engagement is a specialist machine mechanism, not a bus or generator paralleling breaker.","facts":[{"label":"ANSI / IEEE function number","value":"54"},{"label":"Drawing context","value":"The turning-gear mechanism and speed/interlock signals"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-abb-secogear","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["generator-package","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/54-turning-gear-engaging-device","illustration":"https://eloragrid.ai/library/illustrations/54-turning-gear-engaging-device.svg"},{"slug":"55-power-factor-protection","name":"Power factor protection","kind":"function","abbreviation":"55","aliases":["power factor relay","cos phi relay","ANSI 55","IEEE device 55"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Supervises power factor according to the selected relay's electrical measurement method.","description":["Supervises power factor according to the selected relay's electrical measurement method.","In a drafting package, connect this reference to the current and voltage input references. The associated drawing should trace the power-factor alarm or regulating interface; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the current and voltage input references.","Trace the power-factor alarm or regulating interface."],"drawingChecklist":["Label the current and voltage input references.","Cross-reference the power-factor alarm or regulating interface.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Power factor is a ratio or angular relationship; reactive-power protection 32V uses a power quantity.","facts":[{"label":"ANSI / IEEE function number","value":"55"},{"label":"Drawing context","value":"The current and voltage input references"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["capacitor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/55-power-factor-protection","illustration":"https://eloragrid.ai/library/illustrations/55-power-factor-protection.svg"},{"slug":"56-field-application-relay","name":"Field application relay","kind":"function","abbreviation":"56","aliases":["field application","field apply relay","ANSI 56","IEEE device 56"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Initiates application of excitation at the appropriate step of a machine starting sequence.","description":["Initiates application of excitation at the appropriate step of a machine starting sequence.","In a drafting package, connect this reference to the speed/sequence permission and excitation supply. The associated drawing should trace the field application command and field switching device; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.","This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design."],"readingNotes":["Identify the speed/sequence permission and excitation supply.","Trace the field application command and field switching device."],"drawingChecklist":["Label the speed/sequence permission and excitation supply.","Cross-reference the field application command and field switching device.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Field application is a sequence action; loss-of-excitation 40 supervises abnormal excitation after or during operation.","facts":[{"label":"ANSI / IEEE function number","value":"56"},{"label":"Drawing context","value":"The speed/sequence permission and excitation supply"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["motor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/56-field-application-relay","illustration":"https://eloragrid.ai/library/illustrations/56-field-application-relay.svg"},{"slug":"57-short-circuiting-or-grounding-device","name":"Short-circuiting or grounding device","kind":"function","abbreviation":"57","aliases":["shorting device","grounding device","ANSI 57","IEEE device 57"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Makes a defined short-circuit or earth connection for the purpose shown in the machine or apparatus scheme.","description":["Makes a defined short-circuit or earth connection for the purpose shown in the machine or apparatus scheme.","In a drafting package, connect this reference to the conductors being shorted or earthed. The associated drawing should trace the operating mechanism and interlocks; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the conductors being shorted or earthed.","Trace the operating mechanism and interlocks."],"drawingChecklist":["Label the conductors being shorted or earthed.","Cross-reference the operating mechanism and interlocks.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"The function number does not establish the making capacity or safe-use procedure of an earthing device.","facts":[{"label":"ANSI / IEEE function number","value":"57"},{"label":"Drawing context","value":"The conductors being shorted or earthed"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["earthing-switch","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/57-short-circuiting-or-grounding-device","illustration":"https://eloragrid.ai/library/illustrations/57-short-circuiting-or-grounding-device.svg"},{"slug":"58-rectification-failure-relay","name":"Rectification failure relay","kind":"function","abbreviation":"58","aliases":["rectifier failure","rectification monitoring","ANSI 58","IEEE device 58"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Detects failure or abnormal operation in a rectifier arrangement.","description":["Detects failure or abnormal operation in a rectifier arrangement.","In a drafting package, connect this reference to the rectifier monitoring circuit and DC output reference. The associated drawing should trace the failure alarm or associated excitation trip path; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.","This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design."],"readingNotes":["Identify the rectifier monitoring circuit and DC output reference.","Trace the failure alarm or associated excitation trip path."],"drawingChecklist":["Label the rectifier monitoring circuit and DC output reference.","Cross-reference the failure alarm or associated excitation trip path.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Rectification failure supervision differs from a general DC undervoltage function.","facts":[{"label":"ANSI / IEEE function number","value":"58"},{"label":"Drawing context","value":"The rectifier monitoring circuit and DC output reference"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["power-converter","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/58-rectification-failure-relay","illustration":"https://eloragrid.ai/library/illustrations/58-rectification-failure-relay.svg"},{"slug":"60-voltage-or-current-balance-relay","name":"Voltage or current balance relay","kind":"function","abbreviation":"60","aliases":["balance relay","loss of potential","VT fuse failure","ANSI 60","IEEE device 60"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Compares related measured circuits or quantities to detect an abnormal imbalance.","description":["Compares related measured circuits or quantities to detect an abnormal imbalance.","In a drafting package, connect this reference to the compared voltage or current circuits. The associated drawing should trace the balance alarm and any blocked protection functions; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the compared voltage or current circuits.","Trace the balance alarm and any blocked protection functions."],"drawingChecklist":["Label the compared voltage or current circuits.","Cross-reference the balance alarm and any blocked protection functions.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A 60 label may denote loss-of-potential supervision in a modern relay; it is not universally a complete VT fuse-failure scheme.","facts":[{"label":"ANSI / IEEE function number","value":"60"},{"label":"Drawing context","value":"The compared voltage or current circuits"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-abb-secogear","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["voltage-transformer","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/60-voltage-or-current-balance-relay","illustration":"https://eloragrid.ai/library/illustrations/60-voltage-or-current-balance-relay.svg"},{"slug":"61-density-switch-or-sensor","name":"Density switch or sensor","kind":"function","abbreviation":"61","aliases":["gas density sensor","density monitor","ANSI 61","IEEE device 61"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Monitors the density of a medium used by electrical equipment.","description":["Monitors the density of a medium used by electrical equipment.","In a drafting package, connect this reference to the density sensor and monitored compartment. The associated drawing should trace the density alarm, lockout or operating permission; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the density sensor and monitored compartment.","Trace the density alarm, lockout or operating permission."],"drawingChecklist":["Label the density sensor and monitored compartment.","Cross-reference the density alarm, lockout or operating permission.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Density is distinct from pressure; temperature-compensated gas-density supervision should not be relabelled as 63 solely because a gauge is present.","facts":[{"label":"ANSI / IEEE function number","value":"61"},{"label":"Drawing context","value":"The density sensor and monitored compartment"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-abb-secogear","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["switchgear-panel","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/61-density-switch-or-sensor","illustration":"https://eloragrid.ai/library/illustrations/61-density-switch-or-sensor.svg"},{"slug":"62-time-delay-stopping-or-opening-relay","name":"Time-delay stopping or opening relay","kind":"function","abbreviation":"62","aliases":["opening timer","stopping timer","time delay relay","ANSI 62","IEEE device 62"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Introduces a documented delay in a stopping or opening operation.","description":["Introduces a documented delay in a stopping or opening operation.","In a drafting package, connect this reference to the timer trigger, reset condition and control supply. The associated drawing should trace the delayed opening or stopping output; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the timer trigger, reset condition and control supply.","Trace the delayed opening or stopping output."],"drawingChecklist":["Label the timer trigger, reset condition and control supply.","Cross-reference the delayed opening or stopping output.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Device 62 concerns delayed stopping or opening; device 2 concerns delayed starting or closing.","facts":[{"label":"ANSI / IEEE function number","value":"62"},{"label":"Drawing context","value":"The timer trigger, reset condition and control supply"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-abb-secogear","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["relay-coil","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/62-time-delay-stopping-or-opening-relay","illustration":"https://eloragrid.ai/library/illustrations/62-time-delay-stopping-or-opening-relay.svg"},{"slug":"63-pressure-switch-or-relay","name":"Pressure switch or relay","kind":"function","abbreviation":"63","aliases":["pressure relay","pressure switch","Buchholz pressure","ANSI 63","IEEE device 63"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Provides an electrical response to a gas, liquid or other pressure condition.","description":["Provides an electrical response to a gas, liquid or other pressure condition.","In a drafting package, connect this reference to the monitored vessel or compartment and sensor contact. The associated drawing should trace the pressure alarm, trip or permissive path; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the monitored vessel or compartment and sensor contact.","Trace the pressure alarm, trip or permissive path."],"drawingChecklist":["Label the monitored vessel or compartment and sensor contact.","Cross-reference the pressure alarm, trip or permissive path.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Pressure supervision is not automatically a Buchholz gas-accumulation function; identify the sensor and the actual operating quantity.","facts":[{"label":"ANSI / IEEE function number","value":"63"},{"label":"Drawing context","value":"The monitored vessel or compartment and sensor contact"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-abb-secogear","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["transformer-envelope","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/63-pressure-switch-or-relay","illustration":"https://eloragrid.ai/library/illustrations/63-pressure-switch-or-relay.svg"},{"slug":"64-ground-detector-protection","name":"Ground detector protection","kind":"function","abbreviation":"64","aliases":["earth fault detector","ground protection","ANSI 64","IEEE device 64"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Identifies an earth or ground fault using the circuit arrangement specified for the device.","description":["Identifies an earth or ground fault using the circuit arrangement specified for the device.","In a drafting package, connect this reference to the earthing system and current/voltage detection circuit. The associated drawing should trace the ground-fault alarm or tripping destination; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the earthing system and current/voltage detection circuit.","Trace the ground-fault alarm or tripping destination."],"drawingChecklist":["Label the earthing system and current/voltage detection circuit.","Cross-reference the ground-fault alarm or tripping destination.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"The base number 64 does not state whether detection uses current, voltage or insulation measurement.","facts":[{"label":"ANSI / IEEE function number","value":"64"},{"label":"Drawing context","value":"The earthing system and current/voltage detection circuit"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-abb-secogear","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["protective-earth","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/64-ground-detector-protection","illustration":"https://eloragrid.ai/library/illustrations/64-ground-detector-protection.svg"},{"slug":"65-governor","name":"Governor","kind":"function","abbreviation":"65","aliases":["speed governor","machine governor","ANSI 65","IEEE device 65"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Regulates the operating speed or mechanical input of a generating or rotating unit.","description":["Regulates the operating speed or mechanical input of a generating or rotating unit.","In a drafting package, connect this reference to the speed reference and prime-mover control interface. The associated drawing should trace the governor actuator and controller commands; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the speed reference and prime-mover control interface.","Trace the governor actuator and controller commands."],"drawingChecklist":["Label the speed reference and prime-mover control interface.","Cross-reference the governor actuator and controller commands.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A governor regulates mechanical input; an AVR numbered 90 regulates an electrical voltage objective.","facts":[{"label":"ANSI / IEEE function number","value":"65"},{"label":"Drawing context","value":"The speed reference and prime-mover control interface"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["generator","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/65-governor","illustration":"https://eloragrid.ai/library/illustrations/65-governor.svg"},{"slug":"66-notching-or-jogging-device","name":"Notching or jogging device","kind":"function","abbreviation":"66","aliases":["jogging device","starts per hour","start limitation","ANSI 66","IEEE device 66"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Controls limited machine movements or, in modern motor relays, supervises the allowed starting duty.","description":["Controls limited machine movements or, in modern motor relays, supervises the allowed starting duty.","In a drafting package, connect this reference to the jog command or start counter and time window. The associated drawing should trace the next-start permission and motor control sequence; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the jog command or start counter and time window.","Trace the next-start permission and motor control sequence."],"drawingChecklist":["Label the jog command or start counter and time window.","Cross-reference the next-start permission and motor control sequence.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"The exact 66 application must be stated: jogging control and starts-per-time supervision are not identical behaviours.","facts":[{"label":"ANSI / IEEE function number","value":"66"},{"label":"Drawing context","value":"The jog command or start counter and time window"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-abb-secogear","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["motor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/66-notching-or-jogging-device","illustration":"https://eloragrid.ai/library/illustrations/66-notching-or-jogging-device.svg"},{"slug":"68-blocking-or-out-of-step-supervision","name":"Blocking or out-of-step supervision","kind":"function","abbreviation":"68","aliases":["power swing blocking","blocking relay","ANSI 68","IEEE device 68"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Restrains or coordinates another protection action under the specified system condition.","description":["Restrains or coordinates another protection action under the specified system condition.","In a drafting package, connect this reference to the initiating blocking quantity and supervised protection elements. The associated drawing should trace the blocked, unblocked or permissive logic path; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the initiating blocking quantity and supervised protection elements.","Trace the blocked, unblocked or permissive logic path."],"drawingChecklist":["Label the initiating blocking quantity and supervised protection elements.","Cross-reference the blocked, unblocked or permissive logic path.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Manufacturers also map inrush detection or selectivity logic to 68; the number alone does not identify a universal power-swing algorithm.","facts":[{"label":"ANSI / IEEE function number","value":"68"},{"label":"Drawing context","value":"The initiating blocking quantity and supervised protection elements"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["87-differential","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/68-blocking-or-out-of-step-supervision","illustration":"https://eloragrid.ai/library/illustrations/68-blocking-or-out-of-step-supervision.svg"},{"slug":"69-permissive-control-device","name":"Permissive control device","kind":"function","abbreviation":"69","aliases":["permissive control","control permission","ANSI 69","IEEE device 69"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Permits or prevents an equipment operation according to a selected control condition.","description":["Permits or prevents an equipment operation according to a selected control condition.","In a drafting package, connect this reference to the permissive selector or control input. The associated drawing should trace the inhibited or enabled operating command; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the permissive selector or control input.","Trace the inhibited or enabled operating command."],"drawingChecklist":["Label the permissive selector or control input.","Cross-reference the inhibited or enabled operating command.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A permissive control establishes command authority; a numbered interlocking relay may separately verify apparatus state.","facts":[{"label":"ANSI / IEEE function number","value":"69"},{"label":"Drawing context","value":"The permissive selector or control input"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["selector-switch","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/69-permissive-control-device","illustration":"https://eloragrid.ai/library/illustrations/69-permissive-control-device.svg"},{"slug":"70-rheostat","name":"Rheostat","kind":"function","abbreviation":"70","aliases":["field rheostat","adjustable resistance","ANSI 70","IEEE device 70"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Provides adjustable resistance in a control, excitation or machine circuit.","description":["Provides adjustable resistance in a control, excitation or machine circuit.","In a drafting package, connect this reference to the resistance circuit, adjustment mechanism and operating range reference. The associated drawing should trace the rheostat terminals and drive/control interface; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.","This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design."],"readingNotes":["Identify the resistance circuit, adjustment mechanism and operating range reference.","Trace the rheostat terminals and drive/control interface."],"drawingChecklist":["Label the resistance circuit, adjustment mechanism and operating range reference.","Cross-reference the rheostat terminals and drive/control interface.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A rheostat is a variable resistor arrangement; it is not a complete voltage regulator.","facts":[{"label":"ANSI / IEEE function number","value":"70"},{"label":"Drawing context","value":"The resistance circuit, adjustment mechanism and operating range reference"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["resistor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/70-rheostat","illustration":"https://eloragrid.ai/library/illustrations/70-rheostat.svg"},{"slug":"71-level-switch-or-relay","name":"Level switch or relay","kind":"function","abbreviation":"71","aliases":["liquid level relay","gas level relay","level switch","ANSI 71","IEEE device 71"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Signals a defined level condition in the monitored equipment.","description":["Signals a defined level condition in the monitored equipment.","In a drafting package, connect this reference to the level sensor location and high/low contact meaning. The associated drawing should trace the level alarm, pump control or trip destination; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the level sensor location and high/low contact meaning.","Trace the level alarm, pump control or trip destination."],"drawingChecklist":["Label the level sensor location and high/low contact meaning.","Cross-reference the level alarm, pump control or trip destination.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A level switch supervises level; flow switch 80 supervises movement through a circuit.","facts":[{"label":"ANSI / IEEE function number","value":"71"},{"label":"Drawing context","value":"The level sensor location and high/low contact meaning"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["transformer-envelope","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/71-level-switch-or-relay","illustration":"https://eloragrid.ai/library/illustrations/71-level-switch-or-relay.svg"},{"slug":"72-dc-circuit-breaker","name":"DC circuit breaker","kind":"function","abbreviation":"72","aliases":["direct current circuit breaker","DC breaker","ANSI 72","IEEE device 72"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Interrupts or switches a direct-current power circuit using a breaker selected for DC duty.","description":["Interrupts or switches a direct-current power circuit using a breaker selected for DC duty.","In a drafting package, connect this reference to the DC source, polarity and breaker poles. The associated drawing should trace the DC breaker operating circuits and downstream loads; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the DC source, polarity and breaker poles.","Trace the DC breaker operating circuits and downstream loads."],"drawingChecklist":["Label the DC source, polarity and breaker poles.","Cross-reference the DC breaker operating circuits and downstream loads.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Device 72 identifies a DC breaker; AC breaker 52 cannot be substituted without checking the equipment's DC ratings and duty.","facts":[{"label":"ANSI / IEEE function number","value":"72"},{"label":"Drawing context","value":"The DC source, polarity and breaker poles"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["battery","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/72-dc-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/72-dc-circuit-breaker.svg"},{"slug":"73-load-resistor-contactor","name":"Load-resistor contactor","kind":"function","abbreviation":"73","aliases":["load resistor switch","resistor contactor","ANSI 73","IEEE device 73"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Switches a resistor used to impose, remove or change electrical load in a machine arrangement.","description":["Switches a resistor used to impose, remove or change electrical load in a machine arrangement.","In a drafting package, connect this reference to the load resistor and switched power connection. The associated drawing should trace the contactor control and resistor duty references; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.","This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design."],"readingNotes":["Identify the load resistor and switched power connection.","Trace the contactor control and resistor duty references."],"drawingChecklist":["Label the load resistor and switched power connection.","Cross-reference the contactor control and resistor duty references.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A load-resistor contactor switches the resistor circuit; the resistor's rating and ventilation remain separate design data.","facts":[{"label":"ANSI / IEEE function number","value":"73"},{"label":"Drawing context","value":"The load resistor and switched power connection"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["resistor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/73-load-resistor-contactor","illustration":"https://eloragrid.ai/library/illustrations/73-load-resistor-contactor.svg"},{"slug":"74-alarm-relay","name":"Alarm relay","kind":"function","abbreviation":"74","aliases":["alarm device","alarm relay function","ANSI 74","IEEE device 74"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Provides an electrical alarm output for a documented monitored condition.","description":["Provides an electrical alarm output for a documented monitored condition.","In a drafting package, connect this reference to the initiating condition and alarm supply. The associated drawing should trace the annunciator, SCADA input or common alarm relay; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the initiating condition and alarm supply.","Trace the annunciator, SCADA input or common alarm relay."],"drawingChecklist":["Label the initiating condition and alarm supply.","Cross-reference the annunciator, SCADA input or common alarm relay.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"An alarm relay does not necessarily trip equipment; trace the outputs before assigning a protection action.","facts":[{"label":"ANSI / IEEE function number","value":"74"},{"label":"Drawing context","value":"The initiating condition and alarm supply"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["indicator-lamp","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/74-alarm-relay","illustration":"https://eloragrid.ai/library/illustrations/74-alarm-relay.svg"},{"slug":"75-position-changing-mechanism","name":"Position-changing mechanism","kind":"function","abbreviation":"75","aliases":["position changing device","position mechanism","ANSI 75","IEEE device 75"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Moves an apparatus between defined physical positions.","description":["Moves an apparatus between defined physical positions.","In a drafting package, connect this reference to the mechanism drive and selected target positions. The associated drawing should trace the actuator command, travel limits and status circuits; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the mechanism drive and selected target positions.","Trace the actuator command, travel limits and status circuits."],"drawingChecklist":["Label the mechanism drive and selected target positions.","Cross-reference the actuator command, travel limits and status circuits.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Device 75 moves equipment; device 33 observes a position and device 84 describes an operating mechanism.","facts":[{"label":"ANSI / IEEE function number","value":"75"},{"label":"Drawing context","value":"The mechanism drive and selected target positions"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["disconnector","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/75-position-changing-mechanism","illustration":"https://eloragrid.ai/library/illustrations/75-position-changing-mechanism.svg"},{"slug":"76-dc-overcurrent-relay","name":"DC overcurrent relay","kind":"function","abbreviation":"76","aliases":["direct current overcurrent protection","ANSI 76","IEEE device 76"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Supervises excessive current in a direct-current circuit.","description":["Supervises excessive current in a direct-current circuit.","In a drafting package, connect this reference to the DC current transducer or measurement circuit. The associated drawing should trace the DC trip or alarm output and interrupting device; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the DC current transducer or measurement circuit.","Trace the DC trip or alarm output and interrupting device."],"drawingChecklist":["Label the DC current transducer or measurement circuit.","Cross-reference the DC trip or alarm output and interrupting device.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"AC phase overcurrent 50/51 and DC overcurrent 76 have different measurement and interruption contexts.","facts":[{"label":"ANSI / IEEE function number","value":"76"},{"label":"Drawing context","value":"The DC current transducer or measurement circuit"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["battery","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/76-dc-overcurrent-relay","illustration":"https://eloragrid.ai/library/illustrations/76-dc-overcurrent-relay.svg"},{"slug":"77-telemetering-device","name":"Telemetering device","kind":"function","abbreviation":"77","aliases":["telemetry transmitter","telemetering","ANSI 77","IEEE device 77"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Transmits a measured quantity from its local measurement point to a remote indication or monitoring system.","description":["Transmits a measured quantity from its local measurement point to a remote indication or monitoring system.","In a drafting package, connect this reference to the measured signal, scaling and transmission interface. The associated drawing should trace the remote receiver and monitoring point reference; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.","This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design."],"readingNotes":["Identify the measured signal, scaling and transmission interface.","Trace the remote receiver and monitoring point reference."],"drawingChecklist":["Label the measured signal, scaling and transmission interface.","Cross-reference the remote receiver and monitoring point reference.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Telemetering transfers measurement information; device 16 describes the communications device rather than the measurement role.","facts":[{"label":"ANSI / IEEE function number","value":"77"},{"label":"Drawing context","value":"The measured signal, scaling and transmission interface"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-abb-secogear","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["plc-io","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/77-telemetering-device","illustration":"https://eloragrid.ai/library/illustrations/77-telemetering-device.svg"},{"slug":"78-phase-angle-or-out-of-step-protection","name":"Phase-angle or out-of-step protection","kind":"function","abbreviation":"78","aliases":["out of step relay","pole slip protection","ANSI 78","IEEE device 78"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Supervises the angular relationship or loss of synchronism of an electrical system or machine.","description":["Supervises the angular relationship or loss of synchronism of an electrical system or machine.","In a drafting package, connect this reference to the voltage/current measurement references and protected machine. The associated drawing should trace the out-of-step trip, separation or blocking outputs; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the voltage/current measurement references and protected machine.","Trace the out-of-step trip, separation or blocking outputs."],"drawingChecklist":["Label the voltage/current measurement references and protected machine.","Cross-reference the out-of-step trip, separation or blocking outputs.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Out-of-step protection during operation is distinct from a 25 closing-permission synchronism check.","facts":[{"label":"ANSI / IEEE function number","value":"78"},{"label":"Drawing context","value":"The voltage/current measurement references and protected machine"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["generator","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/78-phase-angle-or-out-of-step-protection","illustration":"https://eloragrid.ai/library/illustrations/78-phase-angle-or-out-of-step-protection.svg"},{"slug":"80-flow-switch-or-relay","name":"Flow switch or relay","kind":"function","abbreviation":"80","aliases":["flow relay","flow monitor","ANSI 80","IEEE device 80"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Reports a flow condition in a monitored gas or liquid circuit.","description":["Reports a flow condition in a monitored gas or liquid circuit.","In a drafting package, connect this reference to the fluid circuit, flow sensor and flow direction. The associated drawing should trace the cooling, lubrication or process alarm/trip destination; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the fluid circuit, flow sensor and flow direction.","Trace the cooling, lubrication or process alarm/trip destination."],"drawingChecklist":["Label the fluid circuit, flow sensor and flow direction.","Cross-reference the cooling, lubrication or process alarm/trip destination.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A flow device indicates movement; level switch 71 indicates a stored-fluid level.","facts":[{"label":"ANSI / IEEE function number","value":"80"},{"label":"Drawing context","value":"The fluid circuit, flow sensor and flow direction"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["generator-package","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/80-flow-switch-or-relay","illustration":"https://eloragrid.ai/library/illustrations/80-flow-switch-or-relay.svg"},{"slug":"82-dc-load-measuring-reclosing-relay","name":"DC load-measuring reclosing relay","kind":"function","abbreviation":"82","aliases":["DC reclosing","load measuring reclosing","ANSI 82","IEEE device 82"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Supervises a DC load condition as part of a documented reclosing arrangement.","description":["Supervises a DC load condition as part of a documented reclosing arrangement.","In a drafting package, connect this reference to the DC load measurement and open-circuit supervision. The associated drawing should trace the controlled DC breaker reclose path; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.","This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design."],"readingNotes":["Identify the DC load measurement and open-circuit supervision.","Trace the controlled DC breaker reclose path."],"drawingChecklist":["Label the DC load measurement and open-circuit supervision.","Cross-reference the controlled DC breaker reclose path.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"DC load-measuring reclosing is a specialist scheme and should not be inferred from an AC autoreclose 79 label.","facts":[{"label":"ANSI / IEEE function number","value":"82"},{"label":"Drawing context","value":"The DC load measurement and open-circuit supervision"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["72-dc-circuit-breaker","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/82-dc-load-measuring-reclosing-relay","illustration":"https://eloragrid.ai/library/illustrations/82-dc-load-measuring-reclosing-relay.svg"},{"slug":"83-automatic-selective-control-or-transfer-relay","name":"Automatic selective control or transfer relay","kind":"function","abbreviation":"83","aliases":["automatic transfer control","selective control","ANSI 83","IEEE device 83"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Automatically selects between control circuits or operating sources under defined conditions.","description":["Automatically selects between control circuits or operating sources under defined conditions.","In a drafting package, connect this reference to the source availability and transfer-permission signals. The associated drawing should trace the selected source command and switching interlocks; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the source availability and transfer-permission signals.","Trace the selected source command and switching interlocks."],"drawingChecklist":["Label the source availability and transfer-permission signals.","Cross-reference the selected source command and switching interlocks.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Automatic transfer logic 83 is different from a manually operated selector 43.","facts":[{"label":"ANSI / IEEE function number","value":"83"},{"label":"Drawing context","value":"The source availability and transfer-permission signals"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["transfer-switch","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/83-automatic-selective-control-or-transfer-relay","illustration":"https://eloragrid.ai/library/illustrations/83-automatic-selective-control-or-transfer-relay.svg"},{"slug":"84-operating-mechanism","name":"Operating mechanism","kind":"function","abbreviation":"84","aliases":["motor operating mechanism","mechanism control","ANSI 84","IEEE device 84"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Provides the motive action that operates electrical apparatus.","description":["Provides the motive action that operates electrical apparatus.","In a drafting package, connect this reference to the mechanism motor or actuator supply. The associated drawing should trace the operated apparatus, command circuit and position proof; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the mechanism motor or actuator supply.","Trace the operated apparatus, command circuit and position proof."],"drawingChecklist":["Label the mechanism motor or actuator supply.","Cross-reference the operated apparatus, command circuit and position proof.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"The mechanism and the power-switching device are separate drawing functions even when supplied as one assembly.","facts":[{"label":"ANSI / IEEE function number","value":"84"},{"label":"Drawing context","value":"The mechanism motor or actuator supply"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["circuit-breaker","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/84-operating-mechanism","illustration":"https://eloragrid.ai/library/illustrations/84-operating-mechanism.svg"},{"slug":"85-pilot-or-carrier-receiver-relay","name":"Pilot or carrier receiver relay","kind":"function","abbreviation":"85","aliases":["pilot protection","carrier receiver","teleprotection receiver","ANSI 85","IEEE device 85"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Receives a communication-assisted protection signal used in a pilot or carrier scheme.","description":["Receives a communication-assisted protection signal used in a pilot or carrier scheme.","In a drafting package, connect this reference to the local and remote protection endpoints and channel. The associated drawing should trace the receive permissive, blocking or transfer-trip logic; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the local and remote protection endpoints and channel.","Trace the receive permissive, blocking or transfer-trip logic."],"drawingChecklist":["Label the local and remote protection endpoints and channel.","Cross-reference the receive permissive, blocking or transfer-trip logic.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A received teleprotection command is not itself a measurement of local fault current.","facts":[{"label":"ANSI / IEEE function number","value":"85"},{"label":"Drawing context","value":"The local and remote protection endpoints and channel"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["67-directional-overcurrent","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/85-pilot-or-carrier-receiver-relay","illustration":"https://eloragrid.ai/library/illustrations/85-pilot-or-carrier-receiver-relay.svg"},{"slug":"88-auxiliary-motor-or-motor-generator","name":"Auxiliary motor or motor-generator","kind":"function","abbreviation":"88","aliases":["auxiliary motor","auxiliary motor generator","ANSI 88","IEEE device 88"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Identifies a motor or motor-generator serving an auxiliary equipment function.","description":["Identifies a motor or motor-generator serving an auxiliary equipment function.","In a drafting package, connect this reference to the auxiliary power supply and driven load. The associated drawing should trace the auxiliary starter and equipment service reference; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the auxiliary power supply and driven load.","Trace the auxiliary starter and equipment service reference."],"drawingChecklist":["Label the auxiliary power supply and driven load.","Cross-reference the auxiliary starter and equipment service reference.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"The auxiliary-machine role differs from the principal generating unit or main process motor.","facts":[{"label":"ANSI / IEEE function number","value":"88"},{"label":"Drawing context","value":"The auxiliary power supply and driven load"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["motor","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/88-auxiliary-motor-or-motor-generator","illustration":"https://eloragrid.ai/library/illustrations/88-auxiliary-motor-or-motor-generator.svg"},{"slug":"90-regulating-device","name":"Regulating device","kind":"function","abbreviation":"90","aliases":["voltage regulator","automatic voltage regulator","AVR","ANSI 90","IEEE device 90"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Adjusts equipment to maintain the controlled electrical or operating quantity.","description":["Adjusts equipment to maintain the controlled electrical or operating quantity.","In a drafting package, connect this reference to the reference value, feedback measurement and control mode. The associated drawing should trace the regulating actuator, excitation or tap-changing interface; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the reference value, feedback measurement and control mode.","Trace the regulating actuator, excitation or tap-changing interface."],"drawingChecklist":["Label the reference value, feedback measurement and control mode.","Cross-reference the regulating actuator, excitation or tap-changing interface.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Device 90 is a general regulating role; identify whether this instance controls voltage, taps or another quantity.","facts":[{"label":"ANSI / IEEE function number","value":"90"},{"label":"Drawing context","value":"The reference value, feedback measurement and control mode"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["power-transformer","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/90-regulating-device","illustration":"https://eloragrid.ai/library/illustrations/90-regulating-device.svg"},{"slug":"91-voltage-directional-relay","name":"Voltage directional relay","kind":"function","abbreviation":"91","aliases":["directional voltage","ANSI 91","IEEE device 91"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Uses a voltage relationship with a defined direction criterion in a specialist protection or control scheme.","description":["Uses a voltage relationship with a defined direction criterion in a specialist protection or control scheme.","In a drafting package, connect this reference to the compared voltage references and polarity convention. The associated drawing should trace the directional-voltage operating circuit; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.","This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design."],"readingNotes":["Identify the compared voltage references and polarity convention.","Trace the directional-voltage operating circuit."],"drawingChecklist":["Label the compared voltage references and polarity convention.","Cross-reference the directional-voltage operating circuit.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Directional voltage 91 is not equivalent to directional power 32 or ordinary overvoltage 59.","facts":[{"label":"ANSI / IEEE function number","value":"91"},{"label":"Drawing context","value":"The compared voltage references and polarity convention"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["voltage-transformer","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/91-voltage-directional-relay","illustration":"https://eloragrid.ai/library/illustrations/91-voltage-directional-relay.svg"},{"slug":"92-voltage-and-power-directional-relay","name":"Voltage and power directional relay","kind":"function","abbreviation":"92","aliases":["directional voltage and power","ANSI 92","IEEE device 92"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Combines voltage and power directional criteria in the specified control or protection arrangement.","description":["Combines voltage and power directional criteria in the specified control or protection arrangement.","In a drafting package, connect this reference to the voltage and current measurement references. The associated drawing should trace the permitted or blocked operating action; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.","This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design."],"readingNotes":["Identify the voltage and current measurement references.","Trace the permitted or blocked operating action."],"drawingChecklist":["Label the voltage and current measurement references.","Cross-reference the permitted or blocked operating action.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"This specialist combined reference requires a scheme description; it should not replace separate modern function labels without justification.","facts":[{"label":"ANSI / IEEE function number","value":"92"},{"label":"Drawing context","value":"The voltage and current measurement references"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["32-directional-power","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/92-voltage-and-power-directional-relay","illustration":"https://eloragrid.ai/library/illustrations/92-voltage-and-power-directional-relay.svg"},{"slug":"93-field-changing-contactor","name":"Field-changing contactor","kind":"function","abbreviation":"93","aliases":["field changing","field change contactor","ANSI 93","IEEE device 93"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Changes the machine excitation connection or arrangement as part of a controlled field sequence.","description":["Changes the machine excitation connection or arrangement as part of a controlled field sequence.","In a drafting package, connect this reference to the field circuits and alternative excitation connections. The associated drawing should trace the field-change coil, contacts and interlocks; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.","This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design."],"readingNotes":["Identify the field circuits and alternative excitation connections.","Trace the field-change coil, contacts and interlocks."],"drawingChecklist":["Label the field circuits and alternative excitation connections.","Cross-reference the field-change coil, contacts and interlocks.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Field-changing 93 switches an excitation arrangement; field application 56 initiates application of the field.","facts":[{"label":"ANSI / IEEE function number","value":"93"},{"label":"Drawing context","value":"The field circuits and alternative excitation connections"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-abb-secogear","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["generator","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/93-field-changing-contactor","illustration":"https://eloragrid.ai/library/illustrations/93-field-changing-contactor.svg"},{"slug":"94-tripping-or-trip-free-relay","name":"Tripping or trip-free relay","kind":"function","abbreviation":"94","aliases":["trip relay","tripping relay","trip free relay","ANSI 94","IEEE device 94"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Initiates a tripping action or provides the trip-related logic described in the scheme.","description":["Initiates a tripping action or provides the trip-related logic described in the scheme.","In a drafting package, connect this reference to the protection initiation and trip-relay supply. The associated drawing should trace the breaker trip coils and auxiliary trip contacts; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings."],"readingNotes":["Identify the protection initiation and trip-relay supply.","Trace the breaker trip coils and auxiliary trip contacts."],"drawingChecklist":["Label the protection initiation and trip-relay supply.","Cross-reference the breaker trip coils and auxiliary trip contacts.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"A trip relay 94 need not have the latching reset behaviour of lockout device 86.","facts":[{"label":"ANSI / IEEE function number","value":"94"},{"label":"Drawing context","value":"The protection initiation and trip-relay supply"},{"label":"Application scope","value":"Protection or apparatus-control role; exact implementation is defined by the equipment documentation."}],"references":[{"sourceId":"pub-function-abb-secogear","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["86-lockout","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/94-tripping-or-trip-free-relay","illustration":"https://eloragrid.ai/library/illustrations/94-tripping-or-trip-free-relay.svg"},{"slug":"21p-phase-distance-protection","name":"Phase distance protection","kind":"function","abbreviation":"21P","aliases":["phase distance","phase impedance","ANSI 21P","IEEE 21P"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Evaluates an impedance characteristic for phase-fault loops on the protected circuit.","description":["Evaluates an impedance characteristic for phase-fault loops on the protected circuit.","The drafting record should connect this function to the phase CT and VT measurements and line direction, then trace the phase distance zones and breaker trip matrix. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL generator protection feature table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the phase CT and VT measurements and line direction.","Trace the phase distance zones and breaker trip matrix."],"drawingChecklist":["Label the phase CT and VT measurements and line direction.","Cross-reference the phase distance zones and breaker trip matrix.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"A phase distance element uses phase-fault loops; ground distance 21G includes the earth-return circuit treatment.","facts":[{"label":"Function designation","value":"21P"},{"label":"Base function","value":"21 — Distance protection"},{"label":"Published mapping","value":"SEL generator protection feature table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-product-catalog","relevance":"Explicit public manufacturer mapping of 21P to phase distance and 21G to ground distance in the protection feature tables."},{"sourceId":"pub-function-sel-generator","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["21-distance-protection","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/21p-phase-distance-protection","illustration":"https://eloragrid.ai/library/illustrations/21p-phase-distance-protection.svg"},{"slug":"21g-ground-distance-protection","name":"Ground distance protection","kind":"function","abbreviation":"21G","aliases":["earth distance","ground impedance","ANSI 21G","IEEE 21G"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Evaluates a distance characteristic for a phase-to-earth fault loop.","description":["Evaluates a distance characteristic for a phase-to-earth fault loop.","The drafting record should connect this function to the phase and residual current references, VT circuit and protected line, then trace the ground distance zones and earth-loop compensation reference. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL line protection documentation). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the phase and residual current references, VT circuit and protected line.","Trace the ground distance zones and earth-loop compensation reference."],"drawingChecklist":["Label the phase and residual current references, VT circuit and protected line.","Cross-reference the ground distance zones and earth-loop compensation reference.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Ground distance includes the ground-loop measurement treatment; it is not simply phase distance with a different alarm label.","facts":[{"label":"Function designation","value":"21G"},{"label":"Base function","value":"21 — Distance protection"},{"label":"Published mapping","value":"SEL line protection documentation"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-product-catalog","relevance":"Explicit public manufacturer mapping of 21P to phase distance and 21G to ground distance in the protection feature tables."},{"sourceId":"pub-function-sel-distance","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["21-distance-protection","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/21g-ground-distance-protection","illustration":"https://eloragrid.ai/library/illustrations/21g-ground-distance-protection.svg"},{"slug":"21yn-admittance-based-earth-fault-protection","name":"Admittance-based earth-fault protection","kind":"function","abbreviation":"21YN","aliases":["earth fault admittance","EFPADM","ANSI 21YN","IEEE 21YN"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Uses earth-fault voltage and current relationships to assess an admittance-based directional criterion.","description":["Uses earth-fault voltage and current relationships to assess an admittance-based directional criterion.","The drafting record should connect this function to the residual voltage and residual current measurements and neutral-earthing method, then trace the earth-fault operating element and selected feeder trip. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (ABB Relion 620 function mapping). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the residual voltage and residual current measurements and neutral-earthing method.","Trace the earth-fault operating element and selected feeder trip."],"drawingChecklist":["Label the residual voltage and residual current measurements and neutral-earthing method.","Cross-reference the earth-fault operating element and selected feeder trip.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"ABB documents 21YN for EFPADM; this admittance earth-fault function is distinct from a generic line-distance zone.","facts":[{"label":"Function designation","value":"21YN"},{"label":"Base function","value":"21 — Distance protection"},{"label":"Published mapping","value":"ABB Relion 620 function mapping"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-abb-mappings","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["21-distance-protection","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/21yn-admittance-based-earth-fault-protection","illustration":"https://eloragrid.ai/library/illustrations/21yn-admittance-based-earth-fault-protection.svg"},{"slug":"27a-auxiliary-input-undervoltage-protection","name":"Auxiliary-input undervoltage protection","kind":"function","abbreviation":"27A","aliases":["auxiliary undervoltage","auxiliary input UV","ANSI 27A","IEEE 27A"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises low voltage using the auxiliary voltage input identified by the selected relay.","description":["Supervises low voltage using the auxiliary voltage input identified by the selected relay.","The drafting record should connect this function to the auxiliary VT or voltage input and its phase assignment, then trace the auxiliary undervoltage output and any closing permission. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the auxiliary VT or voltage input and its phase assignment.","Trace the auxiliary undervoltage output and any closing permission."],"drawingChecklist":["Label the auxiliary VT or voltage input and its phase assignment.","Cross-reference the auxiliary undervoltage output and any closing permission.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"In the cited Eaton family, A distinguishes the auxiliary measurement input; it is not a universal alarm-only suffix.","facts":[{"label":"Function designation","value":"27A"},{"label":"Base function","value":"27 — Undervoltage"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["27-undervoltage","voltage-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/27a-auxiliary-input-undervoltage-protection","illustration":"https://eloragrid.ai/library/illustrations/27a-auxiliary-input-undervoltage-protection.svg"},{"slug":"27m-main-input-undervoltage-protection","name":"Main-input undervoltage protection","kind":"function","abbreviation":"27M","aliases":["main undervoltage","main input UV","ANSI 27M","IEEE 27M"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises low voltage using the relay's main voltage measurement inputs.","description":["Supervises low voltage using the relay's main voltage measurement inputs.","The drafting record should connect this function to the main three-phase voltage inputs and their VT references, then trace the main undervoltage protection or control outputs. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the main three-phase voltage inputs and their VT references.","Trace the main undervoltage protection or control outputs."],"drawingChecklist":["Label the main three-phase voltage inputs and their VT references.","Cross-reference the main undervoltage protection or control outputs.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Main-input 27M and auxiliary-input 27A can supervise different electrical nodes in the same relay.","facts":[{"label":"Function designation","value":"27M"},{"label":"Base function","value":"27 — Undervoltage"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["27-undervoltage","voltage-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/27m-main-input-undervoltage-protection","illustration":"https://eloragrid.ai/library/illustrations/27m-main-input-undervoltage-protection.svg"},{"slug":"27q-reactive-power-undervoltage-protection","name":"Reactive-power undervoltage protection","kind":"function","abbreviation":"27Q","aliases":["reactive power undervoltage","Q U protection","ANSI 27Q","IEEE 27Q"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Combines a reactive-power criterion with undervoltage supervision in the cited interconnection application.","description":["Combines a reactive-power criterion with undervoltage supervision in the cited interconnection application.","The drafting record should connect this function to the voltage and current inputs and defined reactive-power direction, then trace the combined reactive-power and undervoltage operating logic. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the voltage and current inputs and defined reactive-power direction.","Trace the combined reactive-power and undervoltage operating logic."],"drawingChecklist":["Label the voltage and current inputs and defined reactive-power direction.","Cross-reference the combined reactive-power and undervoltage operating logic.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"27Q is an Eaton application designation; ABB separately labels a related function 32Q,27, so retain the device-specific legend.","facts":[{"label":"Function designation","value":"27Q"},{"label":"Base function","value":"27 — Undervoltage"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["27-undervoltage","voltage-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/27q-reactive-power-undervoltage-protection","illustration":"https://eloragrid.ai/library/illustrations/27q-reactive-power-undervoltage-protection.svg"},{"slug":"27t-low-voltage-ride-through-supervision","name":"Low-voltage ride-through supervision","kind":"function","abbreviation":"27T","aliases":["LVRT","voltage ride through","27RT","ANSI 27T","IEEE 27T"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises a voltage-time ride-through criterion used in a generator or interconnection application.","description":["Supervises a voltage-time ride-through criterion used in a generator or interconnection application.","The drafting record should connect this function to the measured terminal voltage and applicable voltage-time characteristic, then trace the ride-through function output and interconnection protection logic. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the measured terminal voltage and applicable voltage-time characteristic.","Trace the ride-through function output and interconnection protection logic."],"drawingChecklist":["Label the measured terminal voltage and applicable voltage-time characteristic.","Cross-reference the ride-through function output and interconnection protection logic.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"A ride-through envelope is not a fixed undervoltage pickup; the reference does not establish compliance with a connection requirement.","facts":[{"label":"Function designation","value":"27T"},{"label":"Base function","value":"27 — Undervoltage"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["27-undervoltage","voltage-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/27t-low-voltage-ride-through-supervision","illustration":"https://eloragrid.ai/library/illustrations/27t-low-voltage-ride-through-supervision.svg"},{"slug":"32n-wattmetric-earth-fault-protection","name":"Wattmetric earth-fault protection","kind":"function","abbreviation":"32N","aliases":["wattmetric earth fault","neutral directional power","WPWDE","ANSI 32N","IEEE 32N"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Uses residual voltage and current to assess earth-fault power in the documented neutral-system application.","description":["Uses residual voltage and current to assess earth-fault power in the documented neutral-system application.","The drafting record should connect this function to the residual voltage and current sources and polarity convention, then trace the wattmetric element and feeder earth-fault trip. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (ABB Relion 620 function mapping). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the residual voltage and current sources and polarity convention.","Trace the wattmetric element and feeder earth-fault trip."],"drawingChecklist":["Label the residual voltage and current sources and polarity convention.","Cross-reference the wattmetric element and feeder earth-fault trip.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"ABB's 32N mapping identifies wattmetric earth-fault protection; it differs from generator reverse active-power protection.","facts":[{"label":"Function designation","value":"32N"},{"label":"Base function","value":"32 — Directional power"},{"label":"Published mapping","value":"ABB Relion 620 function mapping"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-abb-mappings","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["32-directional-power","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/32n-wattmetric-earth-fault-protection","illustration":"https://eloragrid.ai/library/illustrations/32n-wattmetric-earth-fault-protection.svg"},{"slug":"32v-directional-reactive-power-protection","name":"Directional reactive-power protection","kind":"function","abbreviation":"32V","aliases":["VAR protection","directional VAr","reverse reactive power","ANSI 32V","IEEE 32V"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises forward or reverse reactive power using the selected relay's power-direction convention.","description":["Supervises forward or reverse reactive power using the selected relay's power-direction convention.","The drafting record should connect this function to the CT/VT measurement pairs and reactive-power sign reference, then trace the reactive-power alarm or operating output. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the CT/VT measurement pairs and reactive-power sign reference.","Trace the reactive-power alarm or operating output."],"drawingChecklist":["Label the CT/VT measurement pairs and reactive-power sign reference.","Cross-reference the reactive-power alarm or operating output.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"In the cited Eaton devices 32V denotes VAR protection; V is not a universal indication of a voltage-only function.","facts":[{"label":"Function designation","value":"32V"},{"label":"Base function","value":"32 — Directional power"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["32-directional-power","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/32v-directional-reactive-power-protection","illustration":"https://eloragrid.ai/library/illustrations/32v-directional-reactive-power-protection.svg"},{"slug":"32r-reverse-power-protection","name":"Reverse-power protection","kind":"function","abbreviation":"32R","aliases":["reverse watts","generator motoring","reverse power relay","ANSI 32R","IEEE 32R"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Detects active power flowing opposite to the defined generator or circuit direction.","description":["Detects active power flowing opposite to the defined generator or circuit direction.","The drafting record should connect this function to the generator CT/VT inputs and the defined export direction, then trace the reverse-power alarm or generator trip path. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (ABB Relion 620 function mapping). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the generator CT/VT inputs and the defined export direction.","Trace the reverse-power alarm or generator trip path."],"drawingChecklist":["Label the generator CT/VT inputs and the defined export direction.","Cross-reference the reverse-power alarm or generator trip path.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Reverse active power 32R differs from reactive-power flow 32V and must be distinguished in the trip schedule.","facts":[{"label":"Function designation","value":"32R"},{"label":"Base function","value":"32 — Directional power"},{"label":"Published mapping","value":"ABB Relion 620 function mapping"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-abb-mappings","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["32-directional-power","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/32r-reverse-power-protection","illustration":"https://eloragrid.ai/library/illustrations/32r-reverse-power-protection.svg"},{"slug":"32u-underpower-protection","name":"Underpower protection","kind":"function","abbreviation":"32U","aliases":["low active power","active underpower","DUPPDPR","ANSI 32U","IEEE 32U"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises active power below the documented operating criterion.","description":["Supervises active power below the documented operating criterion.","The drafting record should connect this function to the active-power measurement circuit and operating-state supervision, then trace the underpower alarm or selected protection output. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (ABB Relion 620 function mapping). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the active-power measurement circuit and operating-state supervision.","Trace the underpower alarm or selected protection output."],"drawingChecklist":["Label the active-power measurement circuit and operating-state supervision.","Cross-reference the underpower alarm or selected protection output.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"An underpower element measures power; undercurrent 37 can respond differently when voltage or power factor changes.","facts":[{"label":"Function designation","value":"32U"},{"label":"Base function","value":"32 — Directional power"},{"label":"Published mapping","value":"ABB Relion 620 function mapping"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-abb-mappings","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["32-directional-power","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/32u-underpower-protection","illustration":"https://eloragrid.ai/library/illustrations/32u-underpower-protection.svg"},{"slug":"46g-generator-current-unbalance-protection","name":"Generator current-unbalance protection","kind":"function","abbreviation":"46G","aliases":["generator unbalance","generator negative sequence","ANSI 46G","IEEE 46G"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises generator current imbalance using the manufacturer's machine protection implementation.","description":["Supervises generator current imbalance using the manufacturer's machine protection implementation.","The drafting record should connect this function to the generator's three phase-current measurements, then trace the generator unbalance alarm or trip function. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton EGR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the generator's three phase-current measurements.","Trace the generator unbalance alarm or trip function."],"drawingChecklist":["Label the generator's three phase-current measurements.","Cross-reference the generator unbalance alarm or trip function.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"46G names a generator application in the cited Eaton family; it does not universally mean ground overcurrent.","facts":[{"label":"Function designation","value":"46G"},{"label":"Base function","value":"46 — Current unbalance / negative sequence"},{"label":"Published mapping","value":"Eaton EGR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-generator","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["46-current-unbalance","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/46g-generator-current-unbalance-protection","illustration":"https://eloragrid.ai/library/illustrations/46g-generator-current-unbalance-protection.svg"},{"slug":"46pd-phase-discontinuity-protection","name":"Phase-discontinuity protection","kind":"function","abbreviation":"46PD","aliases":["open phase","phase discontinuity","PDNSPTOC","ANSI 46PD","IEEE 46PD"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Uses current-sequence relationships to detect a phase-discontinuity condition.","description":["Uses current-sequence relationships to detect a phase-discontinuity condition.","The drafting record should connect this function to the three phase CT circuits and current-unbalance ratio reference, then trace the open-phase alarm or trip logic. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (ABB Relion 620 function mapping). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the three phase CT circuits and current-unbalance ratio reference.","Trace the open-phase alarm or trip logic."],"drawingChecklist":["Label the three phase CT circuits and current-unbalance ratio reference.","Cross-reference the open-phase alarm or trip logic.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"ABB's 46PD application is phase discontinuity; a phase-order relay and an ordinary overcurrent element address different conditions.","facts":[{"label":"Function designation","value":"46PD"},{"label":"Base function","value":"46 — Current unbalance / negative sequence"},{"label":"Published mapping","value":"ABB Relion 620 function mapping"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-abb-mappings","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["46-current-unbalance","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/46pd-phase-discontinuity-protection","illustration":"https://eloragrid.ai/library/illustrations/46pd-phase-discontinuity-protection.svg"},{"slug":"49r-rtd-based-thermal-protection","name":"RTD-based thermal protection","kind":"function","abbreviation":"49R","aliases":["RTD thermal overload","resistance temperature detector protection","ANSI 49R","IEEE 49R"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Uses resistance-temperature-detector measurements for an equipment thermal protection function.","description":["Uses resistance-temperature-detector measurements for an equipment thermal protection function.","The drafting record should connect this function to the RTD channel assignments, sensor wiring and monitored locations, then trace the thermal alarm and equipment trip outputs. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL generator protection feature table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the RTD channel assignments, sensor wiring and monitored locations.","Trace the thermal alarm and equipment trip outputs."],"drawingChecklist":["Label the RTD channel assignments, sensor wiring and monitored locations.","Cross-reference the thermal alarm and equipment trip outputs.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"RTD-based 49R uses measured temperature; a current-driven thermal model can have a separate response and wiring arrangement.","facts":[{"label":"Function designation","value":"49R"},{"label":"Base function","value":"49 — Thermal protection"},{"label":"Published mapping","value":"SEL generator protection feature table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-generator","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["49-thermal-protection","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/49r-rtd-based-thermal-protection","illustration":"https://eloragrid.ai/library/illustrations/49r-rtd-based-thermal-protection.svg"},{"slug":"49m-motor-thermal-model-protection","name":"Motor thermal-model protection","kind":"function","abbreviation":"49M","aliases":["motor thermal overload","MPTTR","ANSI 49M","IEEE 49M"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Estimates motor thermal duty using the selected relay's motor thermal model.","description":["Estimates motor thermal duty using the selected relay's motor thermal model.","The drafting record should connect this function to the motor current measurements and thermal-model data reference, then trace the thermal overload trip and restart permission. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (ABB Relion 620 function mapping). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the motor current measurements and thermal-model data reference.","Trace the thermal overload trip and restart permission."],"drawingChecklist":["Label the motor current measurements and thermal-model data reference.","Cross-reference the thermal overload trip and restart permission.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"A motor thermal model is distinct from a winding thermostat or an RTD alarm channel; both can coexist.","facts":[{"label":"Function designation","value":"49M"},{"label":"Base function","value":"49 — Thermal protection"},{"label":"Published mapping","value":"ABB Relion 620 function mapping"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-abb-mappings","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["49-thermal-protection","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/49m-motor-thermal-model-protection","illustration":"https://eloragrid.ai/library/illustrations/49m-motor-thermal-model-protection.svg"},{"slug":"50p-instantaneous-phase-overcurrent","name":"Instantaneous phase overcurrent","kind":"function","abbreviation":"50P","aliases":["phase instantaneous overcurrent","phase IOC","ANSI 50P","IEEE 50P"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises phase-current magnitude for the instantaneous overcurrent element.","description":["Supervises phase-current magnitude for the instantaneous overcurrent element.","The drafting record should connect this function to the individual phase CT inputs and protected feeder direction reference, then trace the phase overcurrent trip and any intentional timer stage. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton EMR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the individual phase CT inputs and protected feeder direction reference.","Trace the phase overcurrent trip and any intentional timer stage."],"drawingChecklist":["Label the individual phase CT inputs and protected feeder direction reference.","Cross-reference the phase overcurrent trip and any intentional timer stage.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"P identifies phase-current elements in the cited families; 50N and 50G concern separately defined neutral or ground-current inputs.","facts":[{"label":"Function designation","value":"50P"},{"label":"Base function","value":"50 — Instantaneous overcurrent"},{"label":"Published mapping","value":"Eaton EMR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-motor","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["50-instantaneous-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/50p-instantaneous-phase-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/50p-instantaneous-phase-overcurrent.svg"},{"slug":"50n-instantaneous-neutral-overcurrent","name":"Instantaneous neutral overcurrent","kind":"function","abbreviation":"50N","aliases":["neutral IOC","instantaneous residual overcurrent","ANSI 50N","IEEE 50N"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises the neutral or residual-current quantity identified by the protection scheme.","description":["Supervises the neutral or residual-current quantity identified by the protection scheme.","The drafting record should connect this function to the neutral CT or calculated residual-current source, then trace the neutral overcurrent trip and residual measurement reference. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL public device-number table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the neutral CT or calculated residual-current source.","Trace the neutral overcurrent trip and residual measurement reference."],"drawingChecklist":["Label the neutral CT or calculated residual-current source.","Cross-reference the neutral overcurrent trip and residual measurement reference.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"The letter N alone does not prove whether current is measured directly or calculated from phase inputs.","facts":[{"label":"Function designation","value":"50N"},{"label":"Base function","value":"50 — Instantaneous overcurrent"},{"label":"Published mapping","value":"SEL public device-number table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["50-instantaneous-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/50n-instantaneous-neutral-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/50n-instantaneous-neutral-overcurrent.svg"},{"slug":"50g-instantaneous-ground-overcurrent","name":"Instantaneous ground overcurrent","kind":"function","abbreviation":"50G","aliases":["earth IOC","ground instantaneous overcurrent","ANSI 50G","IEEE 50G"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises the ground-current input or ground-fault quantity identified by the selected relay.","description":["Supervises the ground-current input or ground-fault quantity identified by the selected relay.","The drafting record should connect this function to the ground CT input, earthing connection and sensor polarity, then trace the ground overcurrent trip and circuit earthing reference. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL generator protection feature table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the ground CT input, earthing connection and sensor polarity.","Trace the ground overcurrent trip and circuit earthing reference."],"drawingChecklist":["Label the ground CT input, earthing connection and sensor polarity.","Cross-reference the ground overcurrent trip and circuit earthing reference.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"G is application-dependent: in 50G it denotes ground current, while 87G commonly denotes generator differential.","facts":[{"label":"Function designation","value":"50G"},{"label":"Base function","value":"50 — Instantaneous overcurrent"},{"label":"Published mapping","value":"SEL generator protection feature table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-generator","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["50-instantaneous-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/50g-instantaneous-ground-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/50g-instantaneous-ground-overcurrent.svg"},{"slug":"50q-instantaneous-negative-sequence-overcurrent","name":"Instantaneous negative-sequence overcurrent","kind":"function","abbreviation":"50Q","aliases":["negative sequence IOC","I2 instantaneous","ANSI 50Q","IEEE 50Q"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises negative-sequence current for an instantaneous overcurrent element.","description":["Supervises negative-sequence current for an instantaneous overcurrent element.","The drafting record should connect this function to the three phase-current inputs and calculated negative-sequence quantity, then trace the negative-sequence element and selected trip matrix. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL generator protection feature table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the three phase-current inputs and calculated negative-sequence quantity.","Trace the negative-sequence element and selected trip matrix."],"drawingChecklist":["Label the three phase-current inputs and calculated negative-sequence quantity.","Cross-reference the negative-sequence element and selected trip matrix.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Negative-sequence current is a derived unbalance quantity; it is not a fourth physical CT channel merely because a separate function appears on the SLD.","facts":[{"label":"Function designation","value":"50Q"},{"label":"Base function","value":"50 — Instantaneous overcurrent"},{"label":"Published mapping","value":"SEL generator protection feature table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-generator","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["50-instantaneous-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/50q-instantaneous-negative-sequence-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/50q-instantaneous-negative-sequence-overcurrent.svg"},{"slug":"50r-calculated-residual-instantaneous-overcurrent","name":"Calculated residual instantaneous overcurrent","kind":"function","abbreviation":"50R","aliases":["calculated ground IOC","calculated neutral IOC","ANSI 50R","IEEE 50R"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises an instantaneous residual-current element calculated from phase-current measurements in the cited Eaton family.","description":["Supervises an instantaneous residual-current element calculated from phase-current measurements in the cited Eaton family.","The drafting record should connect this function to the phase CT inputs used to calculate residual current, then trace the calculated residual element and earth-fault trip output. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton EMR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the phase CT inputs used to calculate residual current.","Trace the calculated residual element and earth-fault trip output."],"drawingChecklist":["Label the phase CT inputs used to calculate residual current.","Cross-reference the calculated residual element and earth-fault trip output.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Eaton's R mapping means calculated residual current; a separate measured residual input is identified as X in the same family.","facts":[{"label":"Function designation","value":"50R"},{"label":"Base function","value":"50 — Instantaneous overcurrent"},{"label":"Published mapping","value":"Eaton EMR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-motor","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["50-instantaneous-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/50r-calculated-residual-instantaneous-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/50r-calculated-residual-instantaneous-overcurrent.svg"},{"slug":"50x-measured-ground-instantaneous-overcurrent","name":"Measured ground instantaneous overcurrent","kind":"function","abbreviation":"50X","aliases":["measured neutral IOC","measured ground IOC","ANSI 50X","IEEE 50X"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises the instantaneous element using a separately measured ground or neutral input in the cited Eaton family.","description":["Supervises the instantaneous element using a separately measured ground or neutral input in the cited Eaton family.","The drafting record should connect this function to the dedicated ground/neutral current input and external CT, then trace the measured-current element and associated trip path. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton EMR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the dedicated ground/neutral current input and external CT.","Trace the measured-current element and associated trip path."],"drawingChecklist":["Label the dedicated ground/neutral current input and external CT.","Cross-reference the measured-current element and associated trip path.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"In this Eaton mapping X identifies a measured input; it should not be assumed to mean a generic auxiliary relay.","facts":[{"label":"Function designation","value":"50X"},{"label":"Base function","value":"50 — Instantaneous overcurrent"},{"label":"Published mapping","value":"Eaton EMR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-motor","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["50-instantaneous-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/50x-measured-ground-instantaneous-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/50x-measured-ground-instantaneous-overcurrent.svg"},{"slug":"50bf-circuit-breaker-failure-protection","name":"Circuit-breaker failure protection","kind":"function","abbreviation":"50BF","aliases":["breaker failure","CB failure","BF protection","ANSI 50BF","IEEE 50BF"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Initiates the documented backup action when a breaker does not clear the monitored condition after a trip initiation.","description":["Initiates the documented backup action when a breaker does not clear the monitored condition after a trip initiation.","The drafting record should connect this function to the initiating trips, breaker current/status and failure timer, then trace the retrip and upstream or adjacent breaker trip matrix. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton EMR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the initiating trips, breaker current/status and failure timer.","Trace the retrip and upstream or adjacent breaker trip matrix."],"drawingChecklist":["Label the initiating trips, breaker current/status and failure timer.","Cross-reference the retrip and upstream or adjacent breaker trip matrix.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Breaker failure is a sequence involving initiation and clearance supervision; it is not ordinary instantaneous feeder overcurrent.","facts":[{"label":"Function designation","value":"50BF"},{"label":"Base function","value":"50 — Instantaneous overcurrent"},{"label":"Published mapping","value":"Eaton EMR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-motor","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["50-instantaneous-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/50bf-circuit-breaker-failure-protection","illustration":"https://eloragrid.ai/library/illustrations/50bf-circuit-breaker-failure-protection.svg"},{"slug":"50j-motor-jam-or-stall-protection","name":"Motor jam or stall protection","kind":"function","abbreviation":"50J","aliases":["jam protection","stall protection","motor load jam","ANSI 50J","IEEE 50J"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises a motor current condition associated with a jam or stall in the cited relay application.","description":["Supervises a motor current condition associated with a jam or stall in the cited relay application.","The drafting record should connect this function to the motor CT inputs and running/starting-state logic, then trace the jam or stall trip and reset/restart interface. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton EMR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the motor CT inputs and running/starting-state logic.","Trace the jam or stall trip and reset/restart interface."],"drawingChecklist":["Label the motor CT inputs and running/starting-state logic.","Cross-reference the jam or stall trip and reset/restart interface.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"A jam/stall element requires its application context; starting locked-rotor and running jam protection can use different supervision.","facts":[{"label":"Function designation","value":"50J"},{"label":"Base function","value":"50 — Instantaneous overcurrent"},{"label":"Published mapping","value":"Eaton EMR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-motor","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["50-instantaneous-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/50j-motor-jam-or-stall-protection","illustration":"https://eloragrid.ai/library/illustrations/50j-motor-jam-or-stall-protection.svg"},{"slug":"51p-time-phase-overcurrent-protection","name":"Time phase-overcurrent protection","kind":"function","abbreviation":"51P","aliases":["phase time overcurrent","phase IDMT","ANSI 51P","IEEE 51P"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises phase overcurrent using the selected time-current characteristic or intentional operating delay.","description":["Supervises phase overcurrent using the selected time-current characteristic or intentional operating delay.","The drafting record should connect this function to the phase CT inputs and coordination-study reference, then trace the phase time-overcurrent output and protected breaker. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the phase CT inputs and coordination-study reference.","Trace the phase time-overcurrent output and protected breaker."],"drawingChecklist":["Label the phase CT inputs and coordination-study reference.","Cross-reference the phase time-overcurrent output and protected breaker.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"51P identifies phase overcurrent timing; the symbol alone does not choose an IEC or IEEE curve family.","facts":[{"label":"Function designation","value":"51P"},{"label":"Base function","value":"51 — Time overcurrent"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["51-time-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/51p-time-phase-overcurrent-protection","illustration":"https://eloragrid.ai/library/illustrations/51p-time-phase-overcurrent-protection.svg"},{"slug":"51n-time-neutral-overcurrent-protection","name":"Time neutral-overcurrent protection","kind":"function","abbreviation":"51N","aliases":["neutral IDMT","residual time overcurrent","ANSI 51N","IEEE 51N"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises neutral or residual overcurrent with the configured timing characteristic.","description":["Supervises neutral or residual overcurrent with the configured timing characteristic.","The drafting record should connect this function to the neutral or residual measurement source and CT reference, then trace the neutral time-overcurrent output and earth-fault coordination reference. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL public device-number table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the neutral or residual measurement source and CT reference.","Trace the neutral time-overcurrent output and earth-fault coordination reference."],"drawingChecklist":["Label the neutral or residual measurement source and CT reference.","Cross-reference the neutral time-overcurrent output and earth-fault coordination reference.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Neutral/residual 51N does not determine whether the source is a neutral CT or a residual sum; show the source explicitly.","facts":[{"label":"Function designation","value":"51N"},{"label":"Base function","value":"51 — Time overcurrent"},{"label":"Published mapping","value":"SEL public device-number table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["51-time-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/51n-time-neutral-overcurrent-protection","illustration":"https://eloragrid.ai/library/illustrations/51n-time-neutral-overcurrent-protection.svg"},{"slug":"51g-time-ground-overcurrent-protection","name":"Time ground-overcurrent protection","kind":"function","abbreviation":"51G","aliases":["earth IDMT","ground time overcurrent","ANSI 51G","IEEE 51G"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises ground-current overcurrent with the timing defined by the selected relay and scheme.","description":["Supervises ground-current overcurrent with the timing defined by the selected relay and scheme.","The drafting record should connect this function to the ground-current measurement input and grounding arrangement, then trace the timed earth-fault output and breaker trip path. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL generator protection feature table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the ground-current measurement input and grounding arrangement.","Trace the timed earth-fault output and breaker trip path."],"drawingChecklist":["Label the ground-current measurement input and grounding arrangement.","Cross-reference the timed earth-fault output and breaker trip path.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Ground-current 51G and neutral-current 51N labels can reflect different inputs; do not merge them without the equipment documentation.","facts":[{"label":"Function designation","value":"51G"},{"label":"Base function","value":"51 — Time overcurrent"},{"label":"Published mapping","value":"SEL generator protection feature table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-generator","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["51-time-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/51g-time-ground-overcurrent-protection","illustration":"https://eloragrid.ai/library/illustrations/51g-time-ground-overcurrent-protection.svg"},{"slug":"51q-time-negative-sequence-overcurrent","name":"Time negative-sequence overcurrent","kind":"function","abbreviation":"51Q","aliases":["negative sequence IDMT","I2 time overcurrent","ANSI 51Q","IEEE 51Q"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises negative-sequence current using a time-dependent operating criterion.","description":["Supervises negative-sequence current using a time-dependent operating criterion.","The drafting record should connect this function to the three phase CT measurements used to derive negative-sequence current, then trace the unbalance-sensitive timed trip and coordination reference. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the three phase CT measurements used to derive negative-sequence current.","Trace the unbalance-sensitive timed trip and coordination reference."],"drawingChecklist":["Label the three phase CT measurements used to derive negative-sequence current.","Cross-reference the unbalance-sensitive timed trip and coordination reference.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"51Q is a negative-sequence time-overcurrent element; generator thermal unbalance protection may use a separate machine-damage model.","facts":[{"label":"Function designation","value":"51Q"},{"label":"Base function","value":"51 — Time overcurrent"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["51-time-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/51q-time-negative-sequence-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/51q-time-negative-sequence-overcurrent.svg"},{"slug":"51r-calculated-residual-time-overcurrent","name":"Calculated residual time-overcurrent","kind":"function","abbreviation":"51R","aliases":["calculated residual IDMT","calculated ground time overcurrent","ANSI 51R","IEEE 51R"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Applies time-overcurrent protection to the calculated residual-current input in the cited Eaton family.","description":["Applies time-overcurrent protection to the calculated residual-current input in the cited Eaton family.","The drafting record should connect this function to the phase CT inputs and calculated residual-current channel, then trace the residual time-current element and earth-fault trip. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the phase CT inputs and calculated residual-current channel.","Trace the residual time-current element and earth-fault trip."],"drawingChecklist":["Label the phase CT inputs and calculated residual-current channel.","Cross-reference the residual time-current element and earth-fault trip.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Eaton's 51R uses a calculated quantity; 51X uses a separately measured ground or neutral input.","facts":[{"label":"Function designation","value":"51R"},{"label":"Base function","value":"51 — Time overcurrent"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["51-time-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/51r-calculated-residual-time-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/51r-calculated-residual-time-overcurrent.svg"},{"slug":"51x-measured-ground-time-overcurrent","name":"Measured ground time-overcurrent","kind":"function","abbreviation":"51X","aliases":["measured neutral IDMT","measured ground time overcurrent","ANSI 51X","IEEE 51X"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Applies time-overcurrent protection to a separately measured ground or neutral input in the cited Eaton family.","description":["Applies time-overcurrent protection to a separately measured ground or neutral input in the cited Eaton family.","The drafting record should connect this function to the dedicated CT input and external ground/neutral sensor, then trace the measured earth-fault timing element and trip circuit. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the dedicated CT input and external ground/neutral sensor.","Trace the measured earth-fault timing element and trip circuit."],"drawingChecklist":["Label the dedicated CT input and external ground/neutral sensor.","Cross-reference the measured earth-fault timing element and trip circuit.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"A measured ground input can have different sensitivity and CT requirements from calculated residual current.","facts":[{"label":"Function designation","value":"51X"},{"label":"Base function","value":"51 — Time overcurrent"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["51-time-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/51x-measured-ground-time-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/51x-measured-ground-time-overcurrent.svg"},{"slug":"51v-voltage-dependent-overcurrent","name":"Voltage-dependent overcurrent","kind":"function","abbreviation":"51V","aliases":["voltage restrained overcurrent","voltage controlled overcurrent","ANSI 51V","IEEE 51V"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Changes overcurrent operation according to the measured voltage using the relay's documented voltage-dependent method.","description":["Changes overcurrent operation according to the measured voltage using the relay's documented voltage-dependent method.","The drafting record should connect this function to the current inputs, VT circuit and selected voltage-dependence mode, then trace the overcurrent trip logic and voltage-supervision reference. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the current inputs, VT circuit and selected voltage-dependence mode.","Trace the overcurrent trip logic and voltage-supervision reference."],"drawingChecklist":["Label the current inputs, VT circuit and selected voltage-dependence mode.","Cross-reference the overcurrent trip logic and voltage-supervision reference.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Voltage restraint and voltage control are distinct implementations; a 51V label must be accompanied by the selected device's mode.","facts":[{"label":"Function designation","value":"51V"},{"label":"Base function","value":"51 — Time overcurrent"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["51-time-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/51v-voltage-dependent-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/51v-voltage-dependent-overcurrent.svg"},{"slug":"55a-apparent-power-factor-supervision","name":"Apparent power-factor supervision","kind":"function","abbreviation":"55A","aliases":["apparent power factor","true power factor relay","ANSI 55A","IEEE 55A"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises the apparent power-factor quantity defined in the cited relay family.","description":["Supervises the apparent power-factor quantity defined in the cited relay family.","The drafting record should connect this function to the current and voltage measurements and apparent-factor calculation reference, then trace the apparent power-factor alarm or output. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton E-Series function mapping). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the current and voltage measurements and apparent-factor calculation reference.","Trace the apparent power-factor alarm or output."],"drawingChecklist":["Label the current and voltage measurements and apparent-factor calculation reference.","Cross-reference the apparent power-factor alarm or output.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Apparent power factor and displacement power factor can differ for distorted waveforms; the drawing should retain the manufacturer's quantity definition.","facts":[{"label":"Function designation","value":"55A"},{"label":"Base function","value":"55 — Power factor protection"},{"label":"Published mapping","value":"Eaton E-Series function mapping"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-brochure","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["55-power-factor-protection","voltage-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/55a-apparent-power-factor-supervision","illustration":"https://eloragrid.ai/library/illustrations/55a-apparent-power-factor-supervision.svg"},{"slug":"55d-displacement-power-factor-supervision","name":"Displacement power-factor supervision","kind":"function","abbreviation":"55D","aliases":["displacement power factor","fundamental power factor","ANSI 55D","IEEE 55D"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises displacement power factor as defined by the relay's fundamental-frequency measurements.","description":["Supervises displacement power factor as defined by the relay's fundamental-frequency measurements.","The drafting record should connect this function to the current and voltage inputs and displacement-angle reference, then trace the displacement power-factor output or control interface. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton E-Series function mapping). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the current and voltage inputs and displacement-angle reference.","Trace the displacement power-factor output or control interface."],"drawingChecklist":["Label the current and voltage inputs and displacement-angle reference.","Cross-reference the displacement power-factor output or control interface.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"55D is not interchangeable with the apparent power-factor element 55A when the waveform contains harmonics.","facts":[{"label":"Function designation","value":"55D"},{"label":"Base function","value":"55 — Power factor protection"},{"label":"Published mapping","value":"Eaton E-Series function mapping"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-brochure","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["55-power-factor-protection","voltage-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/55d-displacement-power-factor-supervision","illustration":"https://eloragrid.ai/library/illustrations/55d-displacement-power-factor-supervision.svg"},{"slug":"59n-residual-or-neutral-overvoltage","name":"Residual or neutral overvoltage","kind":"function","abbreviation":"59N","aliases":["neutral displacement","residual overvoltage","broken delta overvoltage","ANSI 59N","IEEE 59N"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises a residual or neutral voltage used by the selected earth-fault or neutral-displacement scheme.","description":["Supervises a residual or neutral voltage used by the selected earth-fault or neutral-displacement scheme.","The drafting record should connect this function to the broken-delta VT, neutral VT or calculated residual-voltage source, then trace the neutral-displacement alarm or earth-fault trip. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL public device-number table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the broken-delta VT, neutral VT or calculated residual-voltage source.","Trace the neutral-displacement alarm or earth-fault trip."],"drawingChecklist":["Label the broken-delta VT, neutral VT or calculated residual-voltage source.","Cross-reference the neutral-displacement alarm or earth-fault trip.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"A residual-voltage function is not ordinary phase overvoltage; source and scaling depend on the VT arrangement.","facts":[{"label":"Function designation","value":"59N"},{"label":"Base function","value":"59 — Overvoltage"},{"label":"Published mapping","value":"SEL public device-number table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["59-overvoltage","voltage-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/59n-residual-or-neutral-overvoltage","illustration":"https://eloragrid.ai/library/illustrations/59n-residual-or-neutral-overvoltage.svg"},{"slug":"59q-negative-sequence-overvoltage","name":"Negative-sequence overvoltage","kind":"function","abbreviation":"59Q","aliases":["negative sequence voltage","V2 overvoltage","ANSI 59Q","IEEE 59Q"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises the negative-sequence component derived from three-phase voltage measurements.","description":["Supervises the negative-sequence component derived from three-phase voltage measurements.","The drafting record should connect this function to the three phase voltage inputs and sequence calculation reference, then trace the voltage-unbalance-sensitive element and selected output. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL public device-number table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the three phase voltage inputs and sequence calculation reference.","Trace the voltage-unbalance-sensitive element and selected output."],"drawingChecklist":["Label the three phase voltage inputs and sequence calculation reference.","Cross-reference the voltage-unbalance-sensitive element and selected output.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Negative-sequence overvoltage indicates an unbalanced voltage component; it differs from a high positive-sequence or phase-voltage threshold.","facts":[{"label":"Function designation","value":"59Q"},{"label":"Base function","value":"59 — Overvoltage"},{"label":"Published mapping","value":"SEL public device-number table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["59-overvoltage","voltage-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/59q-negative-sequence-overvoltage","illustration":"https://eloragrid.ai/library/illustrations/59q-negative-sequence-overvoltage.svg"},{"slug":"59a-auxiliary-input-overvoltage","name":"Auxiliary-input overvoltage","kind":"function","abbreviation":"59A","aliases":["auxiliary overvoltage","auxiliary input OV","ANSI 59A","IEEE 59A"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises high voltage on the auxiliary measurement input in the cited Eaton family.","description":["Supervises high voltage on the auxiliary measurement input in the cited Eaton family.","The drafting record should connect this function to the auxiliary voltage input and the electrical node it measures, then trace the auxiliary overvoltage trip or control output. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the auxiliary voltage input and the electrical node it measures.","Trace the auxiliary overvoltage trip or control output."],"drawingChecklist":["Label the auxiliary voltage input and the electrical node it measures.","Cross-reference the auxiliary overvoltage trip or control output.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Auxiliary-input A distinguishes the input circuit here; it does not universally indicate an alarm-only function.","facts":[{"label":"Function designation","value":"59A"},{"label":"Base function","value":"59 — Overvoltage"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["59-overvoltage","voltage-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/59a-auxiliary-input-overvoltage","illustration":"https://eloragrid.ai/library/illustrations/59a-auxiliary-input-overvoltage.svg"},{"slug":"59m-main-input-overvoltage","name":"Main-input overvoltage","kind":"function","abbreviation":"59M","aliases":["main overvoltage","main input OV","ANSI 59M","IEEE 59M"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises high voltage using the main three-phase inputs in the cited Eaton family.","description":["Supervises high voltage using the main three-phase inputs in the cited Eaton family.","The drafting record should connect this function to the main VT circuit and phase input assignments, then trace the main overvoltage operating outputs. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the main VT circuit and phase input assignments.","Trace the main overvoltage operating outputs."],"drawingChecklist":["Label the main VT circuit and phase input assignments.","Cross-reference the main overvoltage operating outputs.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"59M and 59A can supervise different voltage sources; their labels should match the VT circuits shown.","facts":[{"label":"Function designation","value":"59M"},{"label":"Base function","value":"59 — Overvoltage"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["59-overvoltage","voltage-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/59m-main-input-overvoltage","illustration":"https://eloragrid.ai/library/illustrations/59m-main-input-overvoltage.svg"},{"slug":"64f-field-ground-fault-protection","name":"Field ground-fault protection","kind":"function","abbreviation":"64F","aliases":["rotor field ground","field earth fault","ANSI 64F","IEEE 64F"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Detects an earth fault in a machine field circuit using the selected field-ground detection arrangement.","description":["Detects an earth fault in a machine field circuit using the selected field-ground detection arrangement.","The drafting record should connect this function to the field circuit, injection or sensing equipment and earth reference, then trace the field-ground alarm or trip output. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL generator protection feature table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the field circuit, injection or sensing equipment and earth reference.","Trace the field-ground alarm or trip output."],"drawingChecklist":["Label the field circuit, injection or sensing equipment and earth reference.","Cross-reference the field-ground alarm or trip output.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Field-ground protection addresses the rotor excitation circuit; stator-ground function 64G addresses a different insulation system.","facts":[{"label":"Function designation","value":"64F"},{"label":"Base function","value":"64 — Ground detector protection"},{"label":"Published mapping","value":"SEL generator protection feature table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-generator","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["64-ground-detector-protection","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/64f-field-ground-fault-protection","illustration":"https://eloragrid.ai/library/illustrations/64f-field-ground-fault-protection.svg"},{"slug":"64g-stator-ground-fault-protection","name":"Stator ground-fault protection","kind":"function","abbreviation":"64G","aliases":["stator earth fault","generator ground protection","ANSI 64G","IEEE 64G"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises generator stator earth faults using the selected stator-ground protection method.","description":["Supervises generator stator earth faults using the selected stator-ground protection method.","The drafting record should connect this function to the generator neutral arrangement and the voltage/current or injection inputs, then trace the stator-ground alarm and generator trip matrix. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL generator protection feature table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the generator neutral arrangement and the voltage/current or injection inputs.","Trace the stator-ground alarm and generator trip matrix."],"drawingChecklist":["Label the generator neutral arrangement and the voltage/current or injection inputs.","Cross-reference the stator-ground alarm and generator trip matrix.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"The number 64G alone does not establish 100-percent winding coverage; that depends on the actual method and equipment configuration.","facts":[{"label":"Function designation","value":"64G"},{"label":"Base function","value":"64 — Ground detector protection"},{"label":"Published mapping","value":"SEL generator protection feature table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-generator","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["64-ground-detector-protection","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/64g-stator-ground-fault-protection","illustration":"https://eloragrid.ai/library/illustrations/64g-stator-ground-fault-protection.svg"},{"slug":"67p-directional-phase-overcurrent","name":"Directional phase-overcurrent","kind":"function","abbreviation":"67P","aliases":["phase directional overcurrent","ANSI 67P","IEEE 67P"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Combines phase-current overcurrent operation with the scheme's direction criterion.","description":["Combines phase-current overcurrent operation with the scheme's direction criterion.","The drafting record should connect this function to the phase CT and polarising voltage references and forward-direction definition, then trace the directional phase trip and any pilot-scheme interface. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton E-Series function mapping). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the phase CT and polarising voltage references and forward-direction definition.","Trace the directional phase trip and any pilot-scheme interface."],"drawingChecklist":["Label the phase CT and polarising voltage references and forward-direction definition.","Cross-reference the directional phase trip and any pilot-scheme interface.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Directional phase overcurrent 67P supervises phase quantities; neutral and ground variants use their specified residual or ground inputs.","facts":[{"label":"Function designation","value":"67P"},{"label":"Base function","value":"67 — Directional overcurrent"},{"label":"Published mapping","value":"Eaton E-Series function mapping"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-brochure","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["67-directional-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/67p-directional-phase-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/67p-directional-phase-overcurrent.svg"},{"slug":"67n-directional-neutral-overcurrent","name":"Directional neutral-overcurrent","kind":"function","abbreviation":"67N","aliases":["directional residual current","neutral directional earth fault","ANSI 67N","IEEE 67N"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises neutral or residual overcurrent with a documented directional criterion.","description":["Supervises neutral or residual overcurrent with a documented directional criterion.","The drafting record should connect this function to the residual/neutral CT source and the selected polarising quantity, then trace the directional earth-fault element and feeder trip path. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL public device-number table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the residual/neutral CT source and the selected polarising quantity.","Trace the directional earth-fault element and feeder trip path."],"drawingChecklist":["Label the residual/neutral CT source and the selected polarising quantity.","Cross-reference the directional earth-fault element and feeder trip path.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"67N requires both a current criterion and direction information; a neutral current magnitude alone does not provide direction.","facts":[{"label":"Function designation","value":"67N"},{"label":"Base function","value":"67 — Directional overcurrent"},{"label":"Published mapping","value":"SEL public device-number table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["67-directional-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/67n-directional-neutral-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/67n-directional-neutral-overcurrent.svg"},{"slug":"67g-directional-ground-overcurrent","name":"Directional ground-overcurrent","kind":"function","abbreviation":"67G","aliases":["directional earth overcurrent","ground directional element","ANSI 67G","IEEE 67G"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises a ground-current quantity with direction determined by the selected relay's polarising method.","description":["Supervises a ground-current quantity with direction determined by the selected relay's polarising method.","The drafting record should connect this function to the ground-current input and voltage/current polarising references, then trace the ground directional element and breaker trip. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL generator protection feature table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the ground-current input and voltage/current polarising references.","Trace the ground directional element and breaker trip."],"drawingChecklist":["Label the ground-current input and voltage/current polarising references.","Cross-reference the ground directional element and breaker trip.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Ground and neutral suffixes may identify different inputs; the selected relay's mapping decides how G differs from N.","facts":[{"label":"Function designation","value":"67G"},{"label":"Base function","value":"67 — Directional overcurrent"},{"label":"Published mapping","value":"SEL generator protection feature table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-generator","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["67-directional-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/67g-directional-ground-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/67g-directional-ground-overcurrent.svg"},{"slug":"67q-directional-negative-sequence-overcurrent","name":"Directional negative-sequence overcurrent","kind":"function","abbreviation":"67Q","aliases":["negative sequence directional","I2 directional protection","ANSI 67Q","IEEE 67Q"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Uses negative-sequence quantities to supervise overcurrent operation in a defined direction.","description":["Uses negative-sequence quantities to supervise overcurrent operation in a defined direction.","The drafting record should connect this function to the three phase CT/VT inputs and negative-sequence polarising convention, then trace the directional negative-sequence trip or scheme permission. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL generator protection feature table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the three phase CT/VT inputs and negative-sequence polarising convention.","Trace the directional negative-sequence trip or scheme permission."],"drawingChecklist":["Label the three phase CT/VT inputs and negative-sequence polarising convention.","Cross-reference the directional negative-sequence trip or scheme permission.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"67Q is a sequence-based directional element, not a physical negative-sequence CT connection.","facts":[{"label":"Function designation","value":"67Q"},{"label":"Base function","value":"67 — Directional overcurrent"},{"label":"Published mapping","value":"SEL generator protection feature table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-generator","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["67-directional-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/67q-directional-negative-sequence-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/67q-directional-negative-sequence-overcurrent.svg"},{"slug":"67r-calculated-residual-directional-overcurrent","name":"Calculated residual directional overcurrent","kind":"function","abbreviation":"67R","aliases":["calculated residual directional","calculated ground directional","ANSI 67R","IEEE 67R"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Applies directional overcurrent to calculated residual current in the cited Eaton application.","description":["Applies directional overcurrent to calculated residual current in the cited Eaton application.","The drafting record should connect this function to the phase-current inputs and residual polarising reference, then trace the calculated residual directional element and earth-fault trip. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton EGR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the phase-current inputs and residual polarising reference.","Trace the calculated residual directional element and earth-fault trip."],"drawingChecklist":["Label the phase-current inputs and residual polarising reference.","Cross-reference the calculated residual directional element and earth-fault trip.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"R in this Eaton mapping denotes calculated residual current; its input differs from the separately measured X element.","facts":[{"label":"Function designation","value":"67R"},{"label":"Base function","value":"67 — Directional overcurrent"},{"label":"Published mapping","value":"Eaton EGR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-generator","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["67-directional-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/67r-calculated-residual-directional-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/67r-calculated-residual-directional-overcurrent.svg"},{"slug":"67x-measured-ground-directional-overcurrent","name":"Measured ground directional overcurrent","kind":"function","abbreviation":"67X","aliases":["measured ground directional","measured neutral directional","ANSI 67X","IEEE 67X"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Applies directional supervision to the separately measured ground or neutral current element in the cited Eaton family.","description":["Applies directional supervision to the separately measured ground or neutral current element in the cited Eaton family.","The drafting record should connect this function to the dedicated ground/neutral CT input and polarising references, then trace the measured directional earth-fault trip. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton EGR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the dedicated ground/neutral CT input and polarising references.","Trace the measured directional earth-fault trip."],"drawingChecklist":["Label the dedicated ground/neutral CT input and polarising references.","Cross-reference the measured directional earth-fault trip.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"The X suffix has a product-specific measured-input meaning here; retain the relay manual reference rather than assuming a universal suffix rule.","facts":[{"label":"Function designation","value":"67X"},{"label":"Base function","value":"67 — Directional overcurrent"},{"label":"Published mapping","value":"Eaton EGR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-generator","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["67-directional-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/67x-measured-ground-directional-overcurrent","illustration":"https://eloragrid.ai/library/illustrations/67x-measured-ground-directional-overcurrent.svg"},{"slug":"67yn-multifrequency-admittance-earth-fault-protection","name":"Multifrequency admittance earth-fault protection","kind":"function","abbreviation":"67YN","aliases":["multifrequency earth fault","MFADPSDE","ANSI 67YN","IEEE 67YN"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Assesses earth-fault behaviour using the manufacturer's multifrequency admittance-based method.","description":["Assesses earth-fault behaviour using the manufacturer's multifrequency admittance-based method.","The drafting record should connect this function to the residual current and residual voltage channels and neutral-earthing reference, then trace the admittance earth-fault function and feeder tripping output. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (ABB Relion 620 function mapping). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the residual current and residual voltage channels and neutral-earthing reference.","Trace the admittance earth-fault function and feeder tripping output."],"drawingChecklist":["Label the residual current and residual voltage channels and neutral-earthing reference.","Cross-reference the admittance earth-fault function and feeder tripping output.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"ABB's 67YN mapping identifies a multifrequency method; it is not simply another pickup stage of 67N.","facts":[{"label":"Function designation","value":"67YN"},{"label":"Base function","value":"67 — Directional overcurrent"},{"label":"Published mapping","value":"ABB Relion 620 function mapping"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-abb-mappings","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["67-directional-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/67yn-multifrequency-admittance-earth-fault-protection","illustration":"https://eloragrid.ai/library/illustrations/67yn-multifrequency-admittance-earth-fault-protection.svg"},{"slug":"67nief-transient-or-intermittent-earth-fault-protection","name":"Transient or intermittent earth-fault protection","kind":"function","abbreviation":"67NIEF","aliases":["intermittent earth fault","transient earth fault","INTRPTEF","ANSI 67NIEF","IEEE 67NIEF"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises transient or intermittent earth-fault behaviour in the documented feeder application.","description":["Supervises transient or intermittent earth-fault behaviour in the documented feeder application.","The drafting record should connect this function to the residual-current and voltage measurements and earthing-system reference, then trace the intermittent-fault operating element and affected feeder trip. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (ABB Relion 620 function mapping). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the residual-current and voltage measurements and earthing-system reference.","Trace the intermittent-fault operating element and affected feeder trip."],"drawingChecklist":["Label the residual-current and voltage measurements and earthing-system reference.","Cross-reference the intermittent-fault operating element and affected feeder trip.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"ABB's 67NIEF application treats intermittent fault behaviour; continuous residual overcurrent is a separate protection criterion.","facts":[{"label":"Function designation","value":"67NIEF"},{"label":"Base function","value":"67 — Directional overcurrent"},{"label":"Published mapping","value":"ABB Relion 620 function mapping"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-abb-mappings","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["67-directional-overcurrent","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/67nief-transient-or-intermittent-earth-fault-protection","illustration":"https://eloragrid.ai/library/illustrations/67nief-transient-or-intermittent-earth-fault-protection.svg"},{"slug":"74tcm-trip-coil-monitoring","name":"Trip-coil monitoring","kind":"function","abbreviation":"74TCM","aliases":["trip circuit supervision","trip coil monitor","TCM","TCS","ANSI 74TCM","IEEE 74TCM"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Monitors the electrical integrity of a documented breaker trip-coil circuit.","description":["Monitors the electrical integrity of a documented breaker trip-coil circuit.","The drafting record should connect this function to the trip supply, coil, supervision resistor and breaker auxiliary contacts, then trace the trip-circuit unhealthy alarm and monitoring-device terminals. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the trip supply, coil, supervision resistor and breaker auxiliary contacts.","Trace the trip-circuit unhealthy alarm and monitoring-device terminals."],"drawingChecklist":["Label the trip supply, coil, supervision resistor and breaker auxiliary contacts.","Cross-reference the trip-circuit unhealthy alarm and monitoring-device terminals.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Trip-circuit monitoring detects a circuit condition; it does not prove the breaker mechanism can interrupt fault current.","facts":[{"label":"Function designation","value":"74TCM"},{"label":"Base function","value":"74 — Alarm relay"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["74-alarm-relay","relay-coil"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/74tcm-trip-coil-monitoring","illustration":"https://eloragrid.ai/library/illustrations/74tcm-trip-coil-monitoring.svg"},{"slug":"78vs-voltage-vector-shift-protection","name":"Voltage vector-shift protection","kind":"function","abbreviation":"78VS","aliases":["vector shift","vector surge","78V","ANSI 78VS","IEEE 78VS"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises an abrupt change in the measured voltage phase angle using the selected relay's vector-shift method.","description":["Supervises an abrupt change in the measured voltage phase angle using the selected relay's vector-shift method.","The drafting record should connect this function to the measured voltage inputs and interconnection point, then trace the vector-shift operating output and interconnection protection logic. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL generator protection feature table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the measured voltage inputs and interconnection point.","Trace the vector-shift operating output and interconnection protection logic."],"drawingChecklist":["Label the measured voltage inputs and interconnection point.","Cross-reference the vector-shift operating output and interconnection protection logic.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Vector shift 78VS/78V is a product-mapped function and differs from the complete out-of-step or pole-slip application of base 78.","facts":[{"label":"Function designation","value":"78VS"},{"label":"Base function","value":"78 — Phase-angle or out-of-step protection"},{"label":"Published mapping","value":"SEL generator protection feature table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-generator","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["78-phase-angle-or-out-of-step-protection","voltage-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/78vs-voltage-vector-shift-protection","illustration":"https://eloragrid.ai/library/illustrations/78vs-voltage-vector-shift-protection.svg"},{"slug":"81u-underfrequency-protection","name":"Underfrequency protection","kind":"function","abbreviation":"81U","aliases":["low frequency","under frequency","UF protection","ANSI 81U","IEEE 81U"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises frequency below the defined operating criterion.","description":["Supervises frequency below the defined operating criterion.","The drafting record should connect this function to the voltage-derived frequency source and minimum-voltage supervision, then trace the underfrequency trip or staged load-shedding output. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton E-Series function mapping). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the voltage-derived frequency source and minimum-voltage supervision.","Trace the underfrequency trip or staged load-shedding output."],"drawingChecklist":["Label the voltage-derived frequency source and minimum-voltage supervision.","Cross-reference the underfrequency trip or staged load-shedding output.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Underfrequency measures frequency magnitude; rate-of-change function 81R evaluates its change over time.","facts":[{"label":"Function designation","value":"81U"},{"label":"Base function","value":"81 — Frequency protection"},{"label":"Published mapping","value":"Eaton E-Series function mapping"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-brochure","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["81-frequency","voltage-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/81u-underfrequency-protection","illustration":"https://eloragrid.ai/library/illustrations/81u-underfrequency-protection.svg"},{"slug":"81o-overfrequency-protection","name":"Overfrequency protection","kind":"function","abbreviation":"81O","aliases":["high frequency","over frequency","OF protection","ANSI 81O","IEEE 81O"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises frequency above the defined operating criterion.","description":["Supervises frequency above the defined operating criterion.","The drafting record should connect this function to the frequency measurement source and enabled overfrequency stage, then trace the generator or interconnection overfrequency output. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton E-Series function mapping). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the frequency measurement source and enabled overfrequency stage.","Trace the generator or interconnection overfrequency output."],"drawingChecklist":["Label the frequency measurement source and enabled overfrequency stage.","Cross-reference the generator or interconnection overfrequency output.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"The suffix O is the letter O for overfrequency; use the complete label to avoid confusion with a zero in search or drawing text.","facts":[{"label":"Function designation","value":"81O"},{"label":"Base function","value":"81 — Frequency protection"},{"label":"Published mapping","value":"Eaton E-Series function mapping"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-brochure","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["81-frequency","voltage-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/81o-overfrequency-protection","illustration":"https://eloragrid.ai/library/illustrations/81o-overfrequency-protection.svg"},{"slug":"81r-rate-of-change-of-frequency-protection","name":"Rate-of-change-of-frequency protection","kind":"function","abbreviation":"81R","aliases":["ROCOF","df dt","df/dt","frequency rate of change","ANSI 81R","IEEE 81R"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Supervises the rate at which measured electrical frequency changes.","description":["Supervises the rate at which measured electrical frequency changes.","The drafting record should connect this function to the frequency measurement source, observation method and voltage supervision, then trace the ROCOF output and interconnection protection matrix. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton E-Series function mapping). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the frequency measurement source, observation method and voltage supervision.","Trace the ROCOF output and interconnection protection matrix."],"drawingChecklist":["Label the frequency measurement source, observation method and voltage supervision.","Cross-reference the ROCOF output and interconnection protection matrix.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"ROCOF differs from a simple underfrequency threshold; measurement window and supervision are device-specific settings.","facts":[{"label":"Function designation","value":"81R"},{"label":"Base function","value":"81 — Frequency protection"},{"label":"Published mapping","value":"Eaton E-Series function mapping"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-brochure","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["81-frequency","voltage-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/81r-rate-of-change-of-frequency-protection","illustration":"https://eloragrid.ai/library/illustrations/81r-rate-of-change-of-frequency-protection.svg"},{"slug":"87t-transformer-differential-protection","name":"Transformer differential protection","kind":"function","abbreviation":"87T","aliases":["transformer differential","transformer diff","ANSI 87T","IEEE 87T"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Compares currents associated with a transformer protection zone using the selected relay's differential method.","description":["Compares currents associated with a transformer protection zone using the selected relay's differential method.","The drafting record should connect this function to the transformer winding CT circuits, polarity and ratio references, then trace the transformer differential zone and breaker trip matrix. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (ABB Relion 620 function mapping). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the transformer winding CT circuits, polarity and ratio references.","Trace the transformer differential zone and breaker trip matrix."],"drawingChecklist":["Label the transformer winding CT circuits, polarity and ratio references.","Cross-reference the transformer differential zone and breaker trip matrix.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Transformer differential needs a defined zone and winding compensation; it differs from restricted earth-fault protection limited to one earthed winding.","facts":[{"label":"Function designation","value":"87T"},{"label":"Base function","value":"87 — Differential protection"},{"label":"Published mapping","value":"ABB Relion 620 function mapping"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-abb-mappings","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["87-differential","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/87t-transformer-differential-protection","illustration":"https://eloragrid.ai/library/illustrations/87t-transformer-differential-protection.svg"},{"slug":"87b-busbar-differential-protection","name":"Busbar differential protection","kind":"function","abbreviation":"87B","aliases":["bus differential","busbar diff","bus zone protection","ANSI 87B","IEEE 87B"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Compares currents at the boundaries of a busbar protection zone.","description":["Compares currents at the boundaries of a busbar protection zone.","The drafting record should connect this function to the CTs bounding the bus zone and any zone-selection status contacts, then trace the bus differential trip matrix and included breakers. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL public device-number table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the CTs bounding the bus zone and any zone-selection status contacts.","Trace the bus differential trip matrix and included breakers."],"drawingChecklist":["Label the CTs bounding the bus zone and any zone-selection status contacts.","Cross-reference the bus differential trip matrix and included breakers.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"87B commonly identifies bus differential, but ABB also uses 87B for a phase-B high-impedance element; the application legend resolves the meaning.","facts":[{"label":"Function designation","value":"87B"},{"label":"Base function","value":"87 — Differential protection"},{"label":"Published mapping","value":"SEL public device-number table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["87-differential","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/87b-busbar-differential-protection","illustration":"https://eloragrid.ai/library/illustrations/87b-busbar-differential-protection.svg"},{"slug":"87g-generator-differential-protection","name":"Generator differential protection","kind":"function","abbreviation":"87G","aliases":["generator differential","generator diff","ANSI 87G","IEEE 87G"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Compares current measurements bounding the selected generator differential zone.","description":["Compares current measurements bounding the selected generator differential zone.","The drafting record should connect this function to the generator terminal and neutral-side CT connections, then trace the generator differential zone and unit tripping matrix. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL public device-number table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the generator terminal and neutral-side CT connections.","Trace the generator differential zone and unit tripping matrix."],"drawingChecklist":["Label the generator terminal and neutral-side CT connections.","Cross-reference the generator differential zone and unit tripping matrix.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"G denotes generator in this differential application; it should not be interpreted using the ground-current meaning of 50G.","facts":[{"label":"Function designation","value":"87G"},{"label":"Base function","value":"87 — Differential protection"},{"label":"Published mapping","value":"SEL public device-number table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["87-differential","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/87g-generator-differential-protection","illustration":"https://eloragrid.ai/library/illustrations/87g-generator-differential-protection.svg"},{"slug":"87m-motor-differential-protection","name":"Motor differential protection","kind":"function","abbreviation":"87M","aliases":["motor differential","motor diff","ANSI 87M","IEEE 87M"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Compares current measurements defining a motor differential protection zone.","description":["Compares current measurements defining a motor differential protection zone.","The drafting record should connect this function to the motor terminal and neutral-end CT connections or flux-balance arrangement, then trace the motor differential trip and starter or breaker interface. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton EMR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the motor terminal and neutral-end CT connections or flux-balance arrangement.","Trace the motor differential trip and starter or breaker interface."],"drawingChecklist":["Label the motor terminal and neutral-end CT connections or flux-balance arrangement.","Cross-reference the motor differential trip and starter or breaker interface.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Motor differential can use percentage or flux-balance methods; the designation alone does not choose the CT arrangement.","facts":[{"label":"Function designation","value":"87M"},{"label":"Base function","value":"87 — Differential protection"},{"label":"Published mapping","value":"Eaton EMR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-motor","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["87-differential","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/87m-motor-differential-protection","illustration":"https://eloragrid.ai/library/illustrations/87m-motor-differential-protection.svg"},{"slug":"87l-line-current-differential-protection","name":"Line current differential protection","kind":"function","abbreviation":"87L","aliases":["line differential","line diff","current differential line","ANSI 87L","IEEE 87L"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Compares current information from the terminals of a protected line using a communication-assisted differential scheme.","description":["Compares current information from the terminals of a protected line using a communication-assisted differential scheme.","The drafting record should connect this function to the local and remote terminal CTs and protection communication links, then trace the line differential zone and terminal breaker trips. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL line differential documentation). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the local and remote terminal CTs and protection communication links.","Trace the line differential zone and terminal breaker trips."],"drawingChecklist":["Label the local and remote terminal CTs and protection communication links.","Cross-reference the line differential zone and terminal breaker trips.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Line differential requires its measurement and communication arrangement; it is not a local distance zone or directional permissive alone.","facts":[{"label":"Function designation","value":"87L"},{"label":"Base function","value":"87 — Differential protection"},{"label":"Published mapping","value":"SEL line differential documentation"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-line","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["87-differential","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/87l-line-current-differential-protection","illustration":"https://eloragrid.ai/library/illustrations/87l-line-current-differential-protection.svg"},{"slug":"87n-neutral-differential-protection","name":"Neutral differential protection","kind":"function","abbreviation":"87N","aliases":["neutral current differential","neutral differential","ANSI 87N","IEEE 87N"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Identifies a differential scheme involving neutral or residual-current quantities as defined by the equipment documentation.","description":["Identifies a differential scheme involving neutral or residual-current quantities as defined by the equipment documentation.","The drafting record should connect this function to the neutral and phase/residual CT circuits and protected winding boundary, then trace the neutral differential operating element and earth-fault trip matrix. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL public device-number table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the neutral and phase/residual CT circuits and protected winding boundary.","Trace the neutral differential operating element and earth-fault trip matrix."],"drawingChecklist":["Label the neutral and phase/residual CT circuits and protected winding boundary.","Cross-reference the neutral differential operating element and earth-fault trip matrix.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"The N suffix does not establish whether the scheme is high- or low-impedance restricted earth fault; record the actual scheme.","facts":[{"label":"Function designation","value":"87N"},{"label":"Base function","value":"87 — Differential protection"},{"label":"Published mapping","value":"SEL public device-number table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["87-differential","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/87n-neutral-differential-protection","illustration":"https://eloragrid.ai/library/illustrations/87n-neutral-differential-protection.svg"},{"slug":"87q-negative-sequence-differential-protection","name":"Negative-sequence differential protection","kind":"function","abbreviation":"87Q","aliases":["negative sequence differential","I2 differential","ANSI 87Q","IEEE 87Q"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Compares negative-sequence current information across a differential protection zone.","description":["Compares negative-sequence current information across a differential protection zone.","The drafting record should connect this function to the zone-boundary phase-current measurements and sequence compensation reference, then trace the negative-sequence differential element and associated trip output. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (SEL public device-number table). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the zone-boundary phase-current measurements and sequence compensation reference.","Trace the negative-sequence differential element and associated trip output."],"drawingChecklist":["Label the zone-boundary phase-current measurements and sequence compensation reference.","Cross-reference the negative-sequence differential element and associated trip output.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Sequence differential 87Q is not the same as local negative-sequence overcurrent 51Q; it compares quantities across a zone.","facts":[{"label":"Function designation","value":"87Q"},{"label":"Base function","value":"87 — Differential protection"},{"label":"Published mapping","value":"SEL public device-number table"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-sel-numbers","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["87-differential","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/87q-negative-sequence-differential-protection","illustration":"https://eloragrid.ai/library/illustrations/87q-negative-sequence-differential-protection.svg"},{"slug":"87r-restrained-current-differential-protection","name":"Restrained current differential protection","kind":"function","abbreviation":"87R","aliases":["restrained differential","percentage differential","ANSI 87R","IEEE 87R"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Uses a differential operating quantity with restraint in the cited transformer-relay application.","description":["Uses a differential operating quantity with restraint in the cited transformer-relay application.","The drafting record should connect this function to the differential-zone CT inputs and restraint-measurement definitions, then trace the restrained element and transformer trip matrix. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the differential-zone CT inputs and restraint-measurement definitions.","Trace the restrained element and transformer trip matrix."],"drawingChecklist":["Label the differential-zone CT inputs and restraint-measurement definitions.","Cross-reference the restrained element and transformer trip matrix.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Eaton's 87R mapping is restrained differential; R here does not mean the calculated residual-current input used in 50R.","facts":[{"label":"Function designation","value":"87R"},{"label":"Base function","value":"87 — Differential protection"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["87-differential","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/87r-restrained-current-differential-protection","illustration":"https://eloragrid.ai/library/illustrations/87r-restrained-current-differential-protection.svg"},{"slug":"87h-unrestrained-high-set-differential-protection","name":"Unrestrained high-set differential protection","kind":"function","abbreviation":"87H","aliases":["high set differential","unrestrained differential","ANSI 87H","IEEE 87H"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Provides the documented high-set or unrestrained differential element in the cited relay family.","description":["Provides the documented high-set or unrestrained differential element in the cited relay family.","The drafting record should connect this function to the same protected-zone CT inputs and high-set element reference, then trace the unrestrained differential trip output. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the same protected-zone CT inputs and high-set element reference.","Trace the unrestrained differential trip output."],"drawingChecklist":["Label the same protected-zone CT inputs and high-set element reference.","Cross-reference the unrestrained differential trip output.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"An unrestrained high-set element differs from the percentage-restrained differential element and must retain its own setting reference.","facts":[{"label":"Function designation","value":"87H"},{"label":"Base function","value":"87 — Differential protection"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["87-differential","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/87h-unrestrained-high-set-differential-protection","illustration":"https://eloragrid.ai/library/illustrations/87h-unrestrained-high-set-differential-protection.svg"},{"slug":"87gd-restricted-ground-differential-protection","name":"Restricted ground differential protection","kind":"function","abbreviation":"87GD","aliases":["restricted ground fault","restricted earth fault","REF","ground differential","ANSI 87GD","IEEE 87GD"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"Compares ground-fault-related currents for the restricted zone defined by the cited relay application.","description":["Compares ground-fault-related currents for the restricted zone defined by the cited relay application.","The drafting record should connect this function to the phase and neutral CT arrangement and winding earthing point, then trace the restricted ground differential zone and trip outputs. Keep the complete designation and equipment tag together so that the SLD, relay logic and terminal schedule describe the same implementation.","The cited mapping is a public manufacturer example (Eaton ETR family). Suffixes are not universal equivalences across products, and this reference supplies neither a protection setting nor certification of the selected scheme."],"readingNotes":["Identify the phase and neutral CT arrangement and winding earthing point.","Trace the restricted ground differential zone and trip outputs."],"drawingChecklist":["Label the phase and neutral CT arrangement and winding earthing point.","Cross-reference the restricted ground differential zone and trip outputs.","Retain the complete suffix, selected device tag and manufacturer manual revision."],"distinction":"Restricted ground differential protects a defined earthed zone; it is distinct from the transformer-wide phase differential element.","facts":[{"label":"Function designation","value":"87GD"},{"label":"Base function","value":"87 — Differential protection"},{"label":"Published mapping","value":"Eaton ETR family"},{"label":"Suffix scope","value":"Application or manufacturer specific; check the complete drawing legend and selected device manual."}],"references":[{"sourceId":"pub-function-eaton-transformer","relevance":"Public primary-source function or application mapping used to identify this designation; wording and drafting notes are original."},{"sourceId":"ieee-functions","relevance":"Device-number and suffix convention. This page is not a reproduction of the full licensed standard."}],"related":["87-differential","current-transformer"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/87gd-restricted-ground-differential-protection","illustration":"https://eloragrid.ai/library/illustrations/87gd-restricted-ground-differential-protection.svg"},{"slug":"single-pole-circuit-breaker","name":"Single-pole circuit breaker","kind":"symbol","abbreviation":"CB 1P","aliases":["HCB1","VCB1"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A circuit breaker interrupts one pole of a circuit.","description":["A circuit breaker interrupts one pole of a circuit. In an expanded schematic the remaining conductors, neutral and protective conductor are drawn separately; the single-pole image does not describe a complete supply arrangement."],"readingNotes":["Count the protected and switched poles independently of the circuit phase count.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State pole count","Identify trip characteristic","Cross-reference the neutral arrangement"],"distinction":"A one-line feeder symbol can represent a multipole device; a single-pole schematic element represents one actual pole.","facts":[{"label":"Drawing role","value":"Circuit interruption"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCB1, VCB1 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-breakers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"breaker-characteristics","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-single-pole-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/single-pole-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/single-pole-circuit-breaker.svg"},{"slug":"thermal-circuit-breaker","name":"Thermal circuit breaker","kind":"symbol","abbreviation":"CB TH","aliases":["HCB11TH","VCB11TH"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A thermal circuit breaker uses a temperature-responsive trip mechanism to detect sustained overload.","description":["A thermal circuit breaker uses a temperature-responsive trip mechanism to detect sustained overload. Thermal operation and short-circuit interruption capability are separate aspects of the selected device."],"readingNotes":["Look for the overload characteristic and ambient-temperature conditions in the equipment schedule.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify thermal setting","Document breaking capacity","Reference supply conditions"],"distinction":"Thermal tripping does not imply the same instantaneous response as magnetic tripping.","facts":[{"label":"Drawing role","value":"Circuit interruption"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCB11TH, VCB11TH (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-breakers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"breaker-characteristics","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-thermal-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/thermal-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/thermal-circuit-breaker.svg"},{"slug":"thermal-magnetic-circuit-breaker","name":"Thermal-magnetic circuit breaker","kind":"symbol","abbreviation":"CB TM","aliases":["HCB11Q9","VCB11Q9"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A thermal-magnetic breaker combines overload response with a magnetic response to high current.","description":["A thermal-magnetic breaker combines overload response with a magnetic response to high current. Its functional annotation helps distinguish the trip mechanism from an electronic trip unit."],"readingNotes":["A curve designation alone does not state every operating limit or breaking rating.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Record rated current and curve","Show protected poles","Reference short-circuit rating"],"distinction":"An electronic trip unit may provide similar protection functions through a different measurement and operating system.","facts":[{"label":"Drawing role","value":"Circuit interruption"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCB11Q9, VCB11Q9 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-breakers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"breaker-characteristics","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-thermal-magnetic-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/thermal-magnetic-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/thermal-magnetic-circuit-breaker.svg"},{"slug":"current-limiting-circuit-breaker","name":"Current-limiting circuit breaker","kind":"symbol","abbreviation":"CB LIM","aliases":["HCB11THI","VCB11THI"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A current-limiting breaker reduces the fault-current peak and energy passed to downstream equipment within its documented operating range.","description":["A current-limiting breaker reduces the fault-current peak and energy passed to downstream equipment within its documented operating range. The drawing tag identifies the characteristic, while coordination data belongs in the design documentation."],"readingNotes":["Use manufacturer let-through curves for the applicable prospective fault level.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify limiting device model","Reference let-through data","Document coordination assumptions"],"distinction":"Current limitation is a fault-interruption characteristic, not a continuously regulated load-current function.","facts":[{"label":"Drawing role","value":"Circuit interruption"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCB11THI, VCB11THI (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-breakers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"breaker-characteristics","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-current-limiting-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/current-limiting-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/current-limiting-circuit-breaker.svg"},{"slug":"residual-current-circuit-breaker","name":"Residual-current circuit breaker","kind":"symbol","abbreviation":"RCCB","aliases":["residual-current device without overcurrent protection"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An RCCB operates on residual current and has no integral overcurrent protection.","description":["An RCCB operates on residual current and has no integral overcurrent protection. The schematic needs both the sensing arrangement and the upstream or associated overcurrent protective device."],"readingNotes":["Follow all monitored live conductors through the residual-current measurement path.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State residual-current rating","Identify type and pole count","Show associated overcurrent protection"],"distinction":"An RCBO also includes overcurrent protection; an RCCB does not.","facts":[{"label":"Drawing role","value":"Circuit interruption"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-breakers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"breaker-characteristics","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-rcd-categories","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["circuit-breaker","core-balance-current-transformer","protective-earth"],"artwork":"edu-residual-current-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/residual-current-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/residual-current-circuit-breaker.svg"},{"slug":"residual-current-breaker-with-overcurrent-protection","name":"Residual-current breaker with overcurrent protection","kind":"symbol","abbreviation":"RCBO","aliases":["HCB11Q13","VCB11Q13","residual-current circuit breaker with overcurrent protection"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An RCBO combines residual-current operation with overcurrent protection in one device.","description":["An RCBO combines residual-current operation with overcurrent protection in one device. It is often shown as a combined protective function rather than as two unrelated devices."],"readingNotes":["Identify which neutral connection is switched, sensed or permanently connected for the selected model.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Record residual-current type","Record overcurrent curve and rating","Verify neutral terminal connections"],"distinction":"An RCBO differs from an RCCB by its integral overcurrent protective function.","facts":[{"label":"Drawing role","value":"Circuit interruption"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCB11Q13, VCB11Q13 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-breakers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"breaker-characteristics","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-rcd-categories","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["circuit-breaker","core-balance-current-transformer","protective-earth"],"artwork":"edu-residual-current-breaker-with-overcurrent-protection","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/residual-current-breaker-with-overcurrent-protection","illustration":"https://eloragrid.ai/library/illustrations/residual-current-breaker-with-overcurrent-protection.svg"},{"slug":"circuit-breaker-with-undervoltage-release","name":"Circuit breaker with undervoltage release","kind":"symbol","abbreviation":"CB UV","aliases":["HCB11Q33","VCB11Q33"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A breaker undervoltage release changes the breaker operating condition when its control voltage falls below the specified range.","description":["A breaker undervoltage release changes the breaker operating condition when its control voltage falls below the specified range. Schematics show the release supply and any associated permissive or trip circuits."],"readingNotes":["Follow the control supply separately from the breaker main poles.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify release voltage","Show release terminals","Cross-reference loss-of-supply behaviour"],"distinction":"An undervoltage release responds to its own supply; a voltage protection relay can measure another circuit and issue a separate trip.","facts":[{"label":"Drawing role","value":"Circuit interruption"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCB11Q33, VCB11Q33 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-breakers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"breaker-characteristics","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-circuit-breaker-with-undervoltage-release","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/circuit-breaker-with-undervoltage-release","illustration":"https://eloragrid.ai/library/illustrations/circuit-breaker-with-undervoltage-release.svg"},{"slug":"circuit-breaker-with-electronic-trip-unit","name":"Circuit breaker with electronic trip unit","kind":"symbol","abbreviation":"CB ETU","aliases":["HCB11Q138","VCB11Q138"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A breaker electronic trip unit measures current and applies configured protection functions.","description":["A breaker electronic trip unit measures current and applies configured protection functions. A functional tag should link the breaker to its selected trip unit, sensors and settings record."],"readingNotes":["Protection setting letters and function names depend on the trip unit family.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name trip unit model","Reference sensor and rating plug","Link protection settings"],"distinction":"The electronic trip unit is part of breaker protection; a remote protection relay is a separate device unless the design documents otherwise.","facts":[{"label":"Drawing role","value":"Circuit interruption"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCB11Q138, VCB11Q138 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-breakers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"breaker-characteristics","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-circuit-breaker-with-electronic-trip-unit","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/circuit-breaker-with-electronic-trip-unit","illustration":"https://eloragrid.ai/library/illustrations/circuit-breaker-with-electronic-trip-unit.svg"},{"slug":"miniature-circuit-breaker","name":"Miniature circuit breaker","kind":"symbol","abbreviation":"MCB","aliases":["miniature breaker"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An MCB is a compact low-voltage circuit breaker commonly used for final circuits and auxiliary supplies.","description":["An MCB is a compact low-voltage circuit breaker commonly used for final circuits and auxiliary supplies. Its symbol must be accompanied by the actual rating, pole count and applicable device standard."],"readingNotes":["Do not infer interrupting rating from the MCB abbreviation.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State current rating and curve","State pole arrangement","Reference product breaking rating"],"distinction":"MCB describes a product family; thermal-magnetic describes an operating mechanism.","facts":[{"label":"Drawing role","value":"Circuit interruption"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-breaker-types","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-miniature-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/miniature-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/miniature-circuit-breaker.svg"},{"slug":"moulded-case-circuit-breaker","name":"Moulded-case circuit breaker","kind":"symbol","abbreviation":"MCCB","aliases":["molded case circuit breaker"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An MCCB is a low-voltage circuit breaker built in a moulded insulating case.","description":["An MCCB is a low-voltage circuit breaker built in a moulded insulating case. Distribution drawings identify its frame, trip rating and trip-unit functions where those affect selection or coordination."],"readingNotes":["Frame size and configured trip current can be different values.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify frame and trip ratings","State breaking capacity","Reference trip-unit settings"],"distinction":"An MCCB outline on an SLD does not establish a manufacturer's mounting footprint.","facts":[{"label":"Drawing role","value":"Circuit interruption"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-breaker-types","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-moulded-case-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/moulded-case-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/moulded-case-circuit-breaker.svg"},{"slug":"air-circuit-breaker","name":"Air circuit breaker","kind":"symbol","abbreviation":"ACB","aliases":["air breaker"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An ACB is a low-voltage circuit breaker using air as its interrupting medium.","description":["An ACB is a low-voltage circuit breaker using air as its interrupting medium. It is frequently used for main incomers or bus couplers and may be fixed or withdrawable."],"readingNotes":["The draw-out mechanism, trip unit and main poles are distinct pieces of drawing information.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State fixed or withdrawable construction","Reference main-pole ratings","Link control and position indication"],"distinction":"ACB denotes an interrupting technology and product family, not a generic synonym for every breaker.","facts":[{"label":"Drawing role","value":"Circuit interruption"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-breaker-types","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-air-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/air-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/air-circuit-breaker.svg"},{"slug":"additional-circuit-breaker-pole","name":"Additional circuit-breaker pole","kind":"symbol","abbreviation":"CB POLE","aliases":["HCB2","VCB2"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An additional pole is a separately drawn part of a multipole circuit breaker.","description":["An additional pole is a separately drawn part of a multipole circuit breaker. Parent and child representations retain a shared device identity while allowing the phase conductors to appear on separate schematic lines."],"readingNotes":["Verify common operation and the shared breaker tag across all poles.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Match parent device tag","Identify pole terminal numbers","Show common mechanical operation"],"distinction":"A second schematic pole is not a second independently operated breaker.","facts":[{"label":"Drawing role","value":"Circuit interruption"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCB2, VCB2 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-additional-breaker-poles","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-additional-circuit-breaker-pole","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/additional-circuit-breaker-pole","illustration":"https://eloragrid.ai/library/illustrations/additional-circuit-breaker-pole.svg"},{"slug":"switch-disconnector","name":"Switch-disconnector","kind":"symbol","abbreviation":"SD","aliases":["HDS11Q69","VDS11Q69","load-break isolator"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A switch-disconnector combines operational switching with an isolation function.","description":["A switch-disconnector combines operational switching with an isolation function. Its designation should distinguish it from a disconnector that is not intended to interrupt load current."],"readingNotes":["Check both switching duty and the documented isolation function.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify utilization category","Show pole and neutral arrangement","Document isolation designation"],"distinction":"A load-break switch is not automatically a switch-disconnector; isolation suitability must be documented.","facts":[{"label":"Drawing role","value":"Switching path"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDS11Q69, VDS11Q69 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-disconnect-variants","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"switching-devices","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["disconnector","circuit-breaker"],"artwork":"edu-switch-disconnector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/switch-disconnector","illustration":"https://eloragrid.ai/library/illustrations/switch-disconnector.svg"},{"slug":"lockable-disconnector","name":"Lockable disconnector","kind":"symbol","abbreviation":"DS LOCK","aliases":["HDS11Q73","VDS11Q73"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A lockable disconnector has a mechanism that can retain the isolation position under a specified locking arrangement.","description":["A lockable disconnector has a mechanism that can retain the isolation position under a specified locking arrangement. The representation needs the operating position and lock reference in addition to the main contact."],"readingNotes":["A drawn padlock marker does not define the full isolation procedure.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show lockable position","Identify lock mechanism","Cross-reference interlock schedule"],"distinction":"Lockability describes the mechanism; load-breaking capability describes electrical duty.","facts":[{"label":"Drawing role","value":"Switching path"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDS11Q73, VDS11Q73 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-disconnect-variants","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"switching-devices","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["disconnector","circuit-breaker"],"artwork":"edu-lockable-disconnector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/lockable-disconnector","illustration":"https://eloragrid.ai/library/illustrations/lockable-disconnector.svg"},{"slug":"lockable-switch-disconnector","name":"Lockable switch-disconnector","kind":"symbol","abbreviation":"SD LOCK","aliases":["HDS11Q77","VDS11Q77"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A lockable switch-disconnector combines an isolation-capable switching device with a documented locking provision.","description":["A lockable switch-disconnector combines an isolation-capable switching device with a documented locking provision. It appears in feeder isolation and maintenance arrangements where both the electrical and mechanical functions matter."],"readingNotes":["Trace the lock provision to the specified handle or operating mechanism.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State switching duty","Identify open-position locking","Reference the handle assembly"],"distinction":"A locking handle does not increase the switching or fault-interruption rating.","facts":[{"label":"Drawing role","value":"Switching path"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDS11Q77, VDS11Q77 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-disconnect-variants","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"switching-devices","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["disconnector","circuit-breaker"],"artwork":"edu-lockable-switch-disconnector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/lockable-switch-disconnector","illustration":"https://eloragrid.ai/library/illustrations/lockable-switch-disconnector.svg"},{"slug":"three-position-disconnector","name":"Three-position disconnector","kind":"symbol","abbreviation":"DS 3POS","aliases":["HDS11Q89","VDS11Q89"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A three-position disconnector selects between two paths and an intermediate position.","description":["A three-position disconnector selects between two paths and an intermediate position. Switchgear schematics must define each position and any linked earth or isolation function explicitly."],"readingNotes":["The middle position must be labelled rather than assumed to be open or earthed.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name all three positions","Draw each connected path","Reference mechanical interlocks"],"distinction":"Three positions describe available states; they do not imply that every transition can occur under load.","facts":[{"label":"Drawing role","value":"Switching path"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDS11Q89, VDS11Q89 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-disconnect-variants","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"switching-devices","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["disconnector","circuit-breaker"],"artwork":"edu-three-position-disconnector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-position-disconnector","illustration":"https://eloragrid.ai/library/illustrations/three-position-disconnector.svg"},{"slug":"semiconductor-power-switch","name":"Semiconductor power switch","kind":"symbol","abbreviation":"SSW","aliases":["HCB11Q53","VCB11Q53","solid state power switch"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A semiconductor power switch controls a power path electronically.","description":["A semiconductor power switch controls a power path electronically. Its power terminals and control input belong to different circuits, and off-state leakage or isolation characteristics require product documentation."],"readingNotes":["Do not interpret the semiconductor off state as a visible mechanical isolation gap.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify input and power terminals","Reference voltage and current ratings","Document external isolation provision"],"distinction":"A solid-state switch is not an isolating disconnector.","facts":[{"label":"Drawing role","value":"Switching path"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCB11Q53, VCB11Q53 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-power-switches","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["disconnector","circuit-breaker"],"artwork":"edu-semiconductor-power-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/semiconductor-power-switch","illustration":"https://eloragrid.ai/library/illustrations/semiconductor-power-switch.svg"},{"slug":"unidirectional-semiconductor-power-switch","name":"Unidirectional semiconductor power switch","kind":"symbol","abbreviation":"SSW UNI","aliases":["HCB11Q57","VCB11Q57"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A unidirectional semiconductor switch has a specified direction for its power conduction or control behaviour.","description":["A unidirectional semiconductor switch has a specified direction for its power conduction or control behaviour. The functional direction must be identified so reversing a schematic orientation does not reverse the intended meaning."],"readingNotes":["Use terminal polarity and the product circuit rather than page orientation to determine direction.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show permitted conduction direction","Identify control polarity","Reference reverse-voltage capability"],"distinction":"Unidirectional operation concerns the circuit path; it does not describe the direction of all system power flows.","facts":[{"label":"Drawing role","value":"Switching path"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCB11Q57, VCB11Q57 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-power-switches","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["disconnector","circuit-breaker"],"artwork":"edu-unidirectional-semiconductor-power-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/unidirectional-semiconductor-power-switch","illustration":"https://eloragrid.ai/library/illustrations/unidirectional-semiconductor-power-switch.svg"},{"slug":"two-pole-power-switch","name":"Two-pole power switch","kind":"symbol","abbreviation":"SW 2P","aliases":["HCB11Q50","VCB11Q50"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A two-pole power switch operates two circuit conductors through a common device.","description":["A two-pole power switch operates two circuit conductors through a common device. The schematic may use separate pole elements linked by a mechanism annotation."],"readingNotes":["Identify whether the two poles are phases, a phase and neutral, or DC conductors.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name both conductors","Show common operator","Reference switching ratings"],"distinction":"Two poles do not necessarily mean a two-phase supply.","facts":[{"label":"Drawing role","value":"Switching path"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCB11Q50, VCB11Q50 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-power-switches","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["disconnector","circuit-breaker"],"artwork":"edu-two-pole-power-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/two-pole-power-switch","illustration":"https://eloragrid.ai/library/illustrations/two-pole-power-switch.svg"},{"slug":"disconnector-auxiliary-no-contact","name":"Disconnector auxiliary NO contact","kind":"symbol","abbreviation":"DS AUX NO","aliases":["HDS21AUX","VDS21AUX"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A normally-open disconnector auxiliary contact provides a separate indication or permissive circuit associated with the disconnector mechanism.","description":["A normally-open disconnector auxiliary contact provides a separate indication or permissive circuit associated with the disconnector mechanism. Its state is read against the documented reference position."],"readingNotes":["The contact tag must link to the disconnector rather than to an unrelated relay coil.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State reference disconnector position","Identify auxiliary terminals","Link the main-device tag"],"distinction":"Auxiliary contacts report or interlock operation; they do not carry the feeder load.","facts":[{"label":"Drawing role","value":"Switching path"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDS21AUX, VDS21AUX (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-additional-breaker-poles","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-fused-disconnects","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["disconnector","circuit-breaker"],"artwork":"edu-disconnector-auxiliary-no-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/disconnector-auxiliary-no-contact","illustration":"https://eloragrid.ai/library/illustrations/disconnector-auxiliary-no-contact.svg"},{"slug":"disconnector-auxiliary-nc-contact","name":"Disconnector auxiliary NC contact","kind":"symbol","abbreviation":"DS AUX NC","aliases":["HDS22AUX","VDS22AUX"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A normally-closed disconnector auxiliary contact is closed in the documented unactuated reference state.","description":["A normally-closed disconnector auxiliary contact is closed in the documented unactuated reference state. It can be used in indication or interlocking circuits while remaining separate from the main power path."],"readingNotes":["Confirm whether the legend defines normal state as open, closed or an explicitly stated mechanism position.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Document reference state","Identify contact rating","Cross-reference main disconnector"],"distinction":"Normally closed describes a contact state, not the normal operating status of the feeder.","facts":[{"label":"Drawing role","value":"Switching path"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDS22AUX, VDS22AUX (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-additional-breaker-poles","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-fused-disconnects","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["disconnector","circuit-breaker"],"artwork":"edu-disconnector-auxiliary-nc-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/disconnector-auxiliary-nc-contact","illustration":"https://eloragrid.ai/library/illustrations/disconnector-auxiliary-nc-contact.svg"},{"slug":"fused-switch","name":"Fused switch","kind":"symbol","abbreviation":"SW FUSE","aliases":["HDS11F","VDS11F"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A fused switch combines a switching function with fuse protection.","description":["A fused switch combines a switching function with fuse protection. The schematic should retain both functions so the fuse rating is not confused with the switch's operational rating."],"readingNotes":["Check whether the selected assembly moves the fuse carrier as part of its operation.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify fuse-link type","State switch utilization category","Show fuse carrier and poles"],"distinction":"A switch with separate series fuses and a fuse-switch can have different mechanical constructions.","facts":[{"label":"Drawing role","value":"Fused circuit"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDS11F, VDS11F (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-fused-disconnects","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"switching-devices","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["fuse","load-break-switch"],"artwork":"edu-fused-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/fused-switch","illustration":"https://eloragrid.ai/library/illustrations/fused-switch.svg"},{"slug":"fuse-switch","name":"Fuse-switch","kind":"symbol","abbreviation":"FUSE SW","aliases":["HFU1FS","VFU1FS"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A fuse-switch uses a fuse-link or fuse carrier as part of its moving switching contact system.","description":["A fuse-switch uses a fuse-link or fuse carrier as part of its moving switching contact system. The equipment designation must identify the actual assembly rather than treating every fused switch as mechanically identical."],"readingNotes":["Read the manufacturer's construction and operating instructions to establish the switching mechanism.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify assembly type","Name compatible fuse links","Show operating handle reference"],"distinction":"Fuse-switch describes the moving contact construction; a fused switch is a broader functional description.","facts":[{"label":"Drawing role","value":"Fused circuit"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HFU1FS, VFU1FS (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-fuse-switches","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"switching-devices","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["fuse","load-break-switch"],"artwork":"edu-fuse-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/fuse-switch","illustration":"https://eloragrid.ai/library/illustrations/fuse-switch.svg"},{"slug":"additional-fused-switch-pole","name":"Additional fused-switch pole","kind":"symbol","abbreviation":"FUSE POLE","aliases":["HDS21F","VDS21F"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An additional fused-switch pole represents another conductor of a common multipole device.","description":["An additional fused-switch pole represents another conductor of a common multipole device. Each fuse-link and pole needs its terminal and phase identification while the common operating mechanism stays linked."],"readingNotes":["A shared device tag should not conceal different fuse ratings on separate conductors.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Link parent switch tag","Identify pole and fuse terminals","Verify common operation"],"distinction":"A child pole is a CAD representation of a common device, not an extra independently operated fused switch.","facts":[{"label":"Drawing role","value":"Fused circuit"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDS21F, VDS21F (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-fused-disconnects","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"switching-devices","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["fuse","load-break-switch"],"artwork":"edu-additional-fused-switch-pole","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/additional-fused-switch-pole","illustration":"https://eloragrid.ai/library/illustrations/additional-fused-switch-pole.svg"},{"slug":"general-purpose-full-range-fuse","name":"General-purpose full-range fuse","kind":"symbol","abbreviation":"gG","aliases":[],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A gG fuse-link provides full-range overcurrent protection for general applications within its documented ratings.","description":["A gG fuse-link provides full-range overcurrent protection for general applications within its documented ratings. The fuse symbol is paired with the utilization category and selected current and voltage ratings."],"readingNotes":["Coordination requires the actual time-current and let-through data, not the letters alone.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Record utilization category","State rated current and voltage","Reference breaking and coordination data"],"distinction":"An aM fuse-link has a partial protection range for motor circuits and needs associated overload protection.","facts":[{"label":"Drawing role","value":"Fused circuit"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-fuses","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"switching-devices","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["fuse","load-break-switch"],"artwork":"edu-general-purpose-full-range-fuse","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/general-purpose-full-range-fuse","illustration":"https://eloragrid.ai/library/illustrations/general-purpose-full-range-fuse.svg"},{"slug":"motor-short-circuit-fuse","name":"Motor short-circuit fuse","kind":"symbol","abbreviation":"aM","aliases":[],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An aM fuse-link is a partial-range fuse used for motor-circuit short-circuit protection.","description":["An aM fuse-link is a partial-range fuse used for motor-circuit short-circuit protection. The drawing must identify the separate overload protective function associated with the motor feeder."],"readingNotes":["Trace the overload relay as a separate element in the control and trip circuits.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State aM rating","Show associated overload protection","Link motor starting-duty data"],"distinction":"An aM fuse does not provide the same full-range overload protection as a general-purpose gG fuse.","facts":[{"label":"Drawing role","value":"Fused circuit"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-fuses","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"switching-devices","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["fuse","load-break-switch"],"artwork":"edu-motor-short-circuit-fuse","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/motor-short-circuit-fuse","illustration":"https://eloragrid.ai/library/illustrations/motor-short-circuit-fuse.svg"},{"slug":"motor-full-range-fuse","name":"Motor full-range fuse","kind":"symbol","abbreviation":"gM","aliases":[],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A gM fuse-link is a motor-circuit fuse with a characteristic chosen for starting and fault conditions.","description":["A gM fuse-link is a motor-circuit fuse with a characteristic chosen for starting and fault conditions. Its dual-rating notation must be recorded accurately, and the motor overload arrangement must be identified."],"readingNotes":["Read both ratings from the selected fuse-link documentation.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Record full dual rating","Reference starting-current characteristic","Identify overload relay"],"distinction":"The two values in a gM marking are not two independently selectable continuous-current ratings.","facts":[{"label":"Drawing role","value":"Fused circuit"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-fuses","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"switching-devices","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["fuse","load-break-switch"],"artwork":"edu-motor-full-range-fuse","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/motor-full-range-fuse","illustration":"https://eloragrid.ai/library/illustrations/motor-full-range-fuse.svg"},{"slug":"current-transformer-with-two-secondaries","name":"Current transformer with two secondaries","kind":"symbol","abbreviation":"CT 2SEC","aliases":["HXF1T31","VXF1T31"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A CT with two secondary windings supplies two documented secondary circuits.","description":["A CT with two secondary windings supplies two documented secondary circuits. A common magnetic circuit must not be mistaken for independent protection cores."],"readingNotes":["Identify which winding supplies each instrument or relay and how the manufacturer rates their combined loading.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name both windings","Record ratios and burdens","Draw each secondary terminal pair"],"distinction":"Two secondaries on a common magnetic circuit are different from separate CT cores.","facts":[{"label":"Drawing role","value":"Current measurement"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HXF1T31, VXF1T31 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-ct","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"instrument-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","ct-test-terminal"],"artwork":"edu-current-transformer-with-two-secondaries","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/current-transformer-with-two-secondaries","illustration":"https://eloragrid.ai/library/illustrations/current-transformer-with-two-secondaries.svg"},{"slug":"tapped-secondary-current-transformer","name":"Tapped-secondary current transformer","kind":"symbol","abbreviation":"CT TAP","aliases":["HXF1T32","VXF1T32"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A tapped CT secondary provides alternative documented transformation ratios through different terminal combinations.","description":["A tapped CT secondary provides alternative documented transformation ratios through different terminal combinations. The schematic must identify the selected tap and the treatment of unused terminals."],"readingNotes":["Determine the operational ratio from the connected tap pair rather than from the full nameplate range.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label selected taps","State operational ratio","Reference unused-terminal instructions"],"distinction":"A tapped winding selects a ratio; it does not create two independently loaded measurement windings.","facts":[{"label":"Drawing role","value":"Current measurement"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HXF1T32, VXF1T32 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-ct","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"instrument-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","ct-test-terminal"],"artwork":"edu-tapped-secondary-current-transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/tapped-secondary-current-transformer","illustration":"https://eloragrid.ai/library/illustrations/tapped-secondary-current-transformer.svg"},{"slug":"current-transformer-with-primary-conductor-indication","name":"Current transformer with primary conductor indication","kind":"symbol","abbreviation":"CT PRI","aliases":["HXF1T33","VXF1T33"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This CT representation explicitly identifies the primary conductor passing through the measurement location.","description":["This CT representation explicitly identifies the primary conductor passing through the measurement location. It helps readers distinguish the power path from the instrument-transformer secondary connections."],"readingNotes":["Preserve the primary direction and polarity reference where directional protection uses the measurement.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Mark primary conductor","Cross-reference secondary polarity","Identify connected meter or relay"],"distinction":"A conductor passing through a CT window is not an electrically connected secondary winding.","facts":[{"label":"Drawing role","value":"Current measurement"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HXF1T33, VXF1T33 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-ct","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"instrument-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","ct-test-terminal"],"artwork":"edu-current-transformer-with-primary-conductor-indication","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/current-transformer-with-primary-conductor-indication","illustration":"https://eloragrid.ai/library/illustrations/current-transformer-with-primary-conductor-indication.svg"},{"slug":"core-balance-current-transformer","name":"Core-balance current transformer","kind":"symbol","abbreviation":"CBCT","aliases":["zero sequence current transformer","residual current transformer"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A core-balance CT measures residual current from the net magnetic effect of conductors passing through its window.","description":["A core-balance CT measures residual current from the net magnetic effect of conductors passing through its window. It is used with earth-fault protection where the conductor arrangement and sheath routing affect the measurement."],"readingNotes":["Verify the included conductors and cable-sheath treatment against the protection scheme.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify enclosed conductors","Show polarity and relay input","Reference sheath-earthing detail"],"distinction":"A CBCT measures a combined residual quantity; a phase CT measures an individual conductor current.","facts":[{"label":"Drawing role","value":"Current measurement"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-ct","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"instrument-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-earth-fault","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","ct-test-terminal"],"artwork":"edu-core-balance-current-transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/core-balance-current-transformer","illustration":"https://eloragrid.ai/library/illustrations/core-balance-current-transformer.svg"},{"slug":"residual-connection-of-phase-cts","name":"Residual connection of phase CTs","kind":"symbol","abbreviation":"CT RES","aliases":[],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A residual CT connection combines secondary currents from phase CTs to obtain a residual-current input.","description":["A residual CT connection combines secondary currents from phase CTs to obtain a residual-current input. This is a connection arrangement that should be drawn explicitly rather than assigned an unsupported separate standard-symbol number."],"readingNotes":["Match secondary polarity and CT characteristics across the connected phases.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show each phase CT","Identify residual summation node","Link earth-fault relay input"],"distinction":"Residual connection of three phase CTs is not the same physical sensor as a core-balance CT.","facts":[{"label":"Drawing role","value":"Current measurement"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-ct","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"instrument-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-earth-fault","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","ct-test-terminal"],"artwork":"edu-residual-connection-of-phase-cts","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/residual-connection-of-phase-cts","illustration":"https://eloragrid.ai/library/illustrations/residual-connection-of-phase-cts.svg"},{"slug":"single-phase-two-winding-transformer","name":"Single-phase two-winding transformer","kind":"symbol","abbreviation":"TX 1PH","aliases":["HXF1T2","VXF1T2"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A single-phase two-winding transformer transfers energy between separate primary and secondary windings.","description":["A single-phase two-winding transformer transfers energy between separate primary and secondary windings. Voltage ratio, power rating, earthing and terminal polarity require annotations beyond a generic drawing outline."],"readingNotes":["Identify winding connections before tracing the supplied control or auxiliary circuit.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State winding voltages","Identify terminal polarity","Reference rating and earthing"],"distinction":"A two-winding transformer is different from an autotransformer with an electrically shared winding.","facts":[{"label":"Drawing role","value":"Winding connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HXF1T2, VXF1T2 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-single-phase-two-winding-transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/single-phase-two-winding-transformer","illustration":"https://eloragrid.ai/library/illustrations/single-phase-two-winding-transformer.svg"},{"slug":"electrostatically-screened-transformer","name":"Electrostatically screened transformer","kind":"symbol","abbreviation":"TX SCREEN","aliases":["HXF1T3","VXF1T3"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A screened transformer includes a documented screen between windings.","description":["A screened transformer includes a documented screen between windings. The drawing must show the screen connection separately from the magnetic coupling and winding terminals."],"readingNotes":["Trace the screen lead to the earth or bonding point specified by the manufacturer.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show screen terminal","Identify winding voltages","Reference screen-earthing instructions"],"distinction":"A screen connection is not an extra power winding or a guarantee of every isolation requirement.","facts":[{"label":"Drawing role","value":"Winding connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HXF1T3, VXF1T3 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-electrostatically-screened-transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/electrostatically-screened-transformer","illustration":"https://eloragrid.ai/library/illustrations/electrostatically-screened-transformer.svg"},{"slug":"three-winding-transformer","name":"Three-winding transformer","kind":"symbol","abbreviation":"TX 3W","aliases":["HXF1T6","VXF1T6"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A three-winding transformer couples three windings through its magnetic system.","description":["A three-winding transformer couples three windings through its magnetic system. Each winding has its own voltage, connection and loading information, so a third winding must remain visible in the drawing and equipment schedule."],"readingNotes":["Determine whether the third winding is intended for a load, a tertiary function or another documented purpose.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify all winding ratings","Record winding connections","Cross-reference terminals and protection"],"distinction":"A third winding is different from a tap on a single winding.","facts":[{"label":"Drawing role","value":"Winding connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HXF1T6, VXF1T6 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-three-winding-transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-winding-transformer","illustration":"https://eloragrid.ai/library/illustrations/three-winding-transformer.svg"},{"slug":"adjustable-ratio-transformer","name":"Adjustable-ratio transformer","kind":"symbol","abbreviation":"TX ADJ","aliases":["HXF1T5","VXF1T5"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An adjustable-ratio transformer includes a documented means of varying its voltage ratio.","description":["An adjustable-ratio transformer includes a documented means of varying its voltage ratio. The functional drawing should identify the adjustment or tap connection without assuming on-load operation."],"readingNotes":["Establish whether changes are permitted energised or only under the manufacturer's off-circuit conditions.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Record adjustment range","Identify operating mechanism","Reference tap-position notation"],"distinction":"Adjustable ratio does not automatically imply an on-load tap changer.","facts":[{"label":"Drawing role","value":"Winding connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HXF1T5, VXF1T5 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-adjustable-ratio-transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/adjustable-ratio-transformer","illustration":"https://eloragrid.ai/library/illustrations/adjustable-ratio-transformer.svg"},{"slug":"single-phase-autotransformer","name":"Single-phase autotransformer","kind":"symbol","abbreviation":"AT 1PH","aliases":["HXF1P1AUTO","VXF1P1AUTO"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A single-phase autotransformer uses a winding portion shared electrically by its input and output circuits.","description":["A single-phase autotransformer uses a winding portion shared electrically by its input and output circuits. Its drawing must make the common connection clear because it does not provide winding separation like a two-winding transformer."],"readingNotes":["Trace the common winding terminal and identify the supply and load tap positions.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State input and output voltages","Show common winding connection","Reference tap and rating data"],"distinction":"An autotransformer is not an isolating two-winding transformer.","facts":[{"label":"Drawing role","value":"Winding connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HXF1P1AUTO, VXF1P1AUTO (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-single-phase-autotransformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/single-phase-autotransformer","illustration":"https://eloragrid.ai/library/illustrations/single-phase-autotransformer.svg"},{"slug":"three-phase-star-autotransformer","name":"Three-phase star autotransformer","kind":"symbol","abbreviation":"AT 3PH Y","aliases":["HXF1T19","VXF1T19"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A three-phase star-connected autotransformer has electrically shared winding portions arranged in a three-phase star connection.","description":["A three-phase star-connected autotransformer has electrically shared winding portions arranged in a three-phase star connection. Its neutral and tap connections need explicit identification."],"readingNotes":["Determine how the common star point and any accessible neutral are used by the design.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show star point","State winding voltage ratios","Reference tap terminals"],"distinction":"A star autotransformer is electrically different from a star-star two-winding transformer.","facts":[{"label":"Drawing role","value":"Winding connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HXF1T19, VXF1T19 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-three-phase-star-autotransformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-phase-star-autotransformer","illustration":"https://eloragrid.ai/library/illustrations/three-phase-star-autotransformer.svg"},{"slug":"star-delta-transformer","name":"Star-delta transformer","kind":"symbol","abbreviation":"TX Y-D","aliases":["HXF1P3SD","VXF1P3SD"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A star-delta transformer connects one winding set in star and the other in delta.","description":["A star-delta transformer connects one winding set in star and the other in delta. The notation identifies winding topology; a clock-number or equivalent phase-displacement designation is still needed where system phase relationships matter."],"readingNotes":["Read which side is star from the declared primary and secondary labels.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify winding sides","State complete vector group","Show neutral availability"],"distinction":"Y-D topology alone does not specify a complete transformer vector group.","facts":[{"label":"Drawing role","value":"Winding connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HXF1P3SD, VXF1P3SD (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-star-delta-transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/star-delta-transformer","illustration":"https://eloragrid.ai/library/illustrations/star-delta-transformer.svg"},{"slug":"delta-star-transformer","name":"Delta-star transformer","kind":"symbol","abbreviation":"TX D-Y","aliases":["HXF1T14","VXF1T14"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A delta-star transformer provides a delta-connected winding and a star-connected winding.","description":["A delta-star transformer provides a delta-connected winding and a star-connected winding. Where the star point is brought out, its neutral and earthing arrangement are separate drawing requirements."],"readingNotes":["Do not infer a grounded neutral merely from a star winding.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State complete vector group","Identify accessible neutral","Reference neutral earthing"],"distinction":"A star winding can exist without an accessible or earthed neutral terminal.","facts":[{"label":"Drawing role","value":"Winding connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HXF1T14, VXF1T14 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-delta-star-transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/delta-star-transformer","illustration":"https://eloragrid.ai/library/illustrations/delta-star-transformer.svg"},{"slug":"delta-delta-transformer","name":"Delta-delta transformer","kind":"symbol","abbreviation":"TX D-D","aliases":["HXF1T13","VXF1T13"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A delta-delta transformer uses delta-connected windings on both sides.","description":["A delta-delta transformer uses delta-connected windings on both sides. The drawing communicates the winding connections while the vector group and device ratings specify the actual transformer arrangement."],"readingNotes":["Check phase-displacement notation when interconnecting supplies.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label both winding voltages","State vector group","Reference protection CT connections"],"distinction":"Two delta windings do not provide a star neutral point.","facts":[{"label":"Drawing role","value":"Winding connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HXF1T13, VXF1T13 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-delta-delta-transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/delta-delta-transformer","illustration":"https://eloragrid.ai/library/illustrations/delta-delta-transformer.svg"},{"slug":"star-star-transformer","name":"Star-star transformer","kind":"symbol","abbreviation":"TX Y-Y","aliases":["HXF1T7","VXF1T7"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A star-star transformer has star-connected windings on both sides.","description":["A star-star transformer has star-connected windings on both sides. Neutral accessibility and system earthing must be shown independently for each winding."],"readingNotes":["Check whether one, both or neither star point is brought to terminals.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify neutral terminals","State vector group","Show earthing connections"],"distinction":"The Y-Y label does not by itself establish neutral availability.","facts":[{"label":"Drawing role","value":"Winding connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HXF1T7, VXF1T7 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-star-star-transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/star-star-transformer","illustration":"https://eloragrid.ai/library/illustrations/star-star-transformer.svg"},{"slug":"star-zigzag-transformer","name":"Star-zigzag transformer","kind":"symbol","abbreviation":"TX Y-Z","aliases":["HXF1T12","VXF1T12"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A star-zigzag transformer combines a star-connected winding set with a zigzag-connected set.","description":["A star-zigzag transformer combines a star-connected winding set with a zigzag-connected set. Its winding arrangement and neutral duties require the manufacturer's complete connection designation."],"readingNotes":["Read the zigzag terminal arrangement from the selected transformer diagram.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Record connection designation","Identify neutral terminal","Reference winding ratings"],"distinction":"A zigzag connection is not another spelling of a simple star winding.","facts":[{"label":"Drawing role","value":"Winding connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HXF1T12, VXF1T12 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-star-zigzag-transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/star-zigzag-transformer","illustration":"https://eloragrid.ai/library/illustrations/star-zigzag-transformer.svg"},{"slug":"star-star-delta-three-winding-transformer","name":"Star-star-delta three-winding transformer","kind":"symbol","abbreviation":"TX Y-Y-D","aliases":["HXF1T15","VXF1T15"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A star-star-delta transformer includes two star-connected winding sets and a delta tertiary winding.","description":["A star-star-delta transformer includes two star-connected winding sets and a delta tertiary winding. The schematic needs all three winding ratings and the intended tertiary connection."],"readingNotes":["Trace the tertiary separately so its protection and terminal status remain visible.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State all three ratings","Show both neutral arrangements","Reference tertiary duty"],"distinction":"A delta tertiary is a third winding, not an alternative connection of the main secondary.","facts":[{"label":"Drawing role","value":"Winding connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HXF1T15, VXF1T15 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-star-star-delta-three-winding-transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/star-star-delta-three-winding-transformer","illustration":"https://eloragrid.ai/library/illustrations/star-star-delta-three-winding-transformer.svg"},{"slug":"delta-winding-connection","name":"Delta winding connection","kind":"symbol","abbreviation":"DELTA","aliases":[],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A delta winding connects three phase windings in a closed loop.","description":["A delta winding connects three phase windings in a closed loop. This connection modifier describes topology within a transformer or machine representation and needs matching terminal labels."],"readingNotes":["Follow all three winding-to-winding connections before interpreting external line terminals.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label line terminals","State winding voltage","Reference complete machine or transformer connection"],"distinction":"A delta connection has no inherent star neutral point.","facts":[{"label":"Drawing role","value":"Three-phase winding"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","generator"],"artwork":"edu-delta-winding-connection","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/delta-winding-connection","illustration":"https://eloragrid.ai/library/illustrations/delta-winding-connection.svg"},{"slug":"open-delta-winding-connection","name":"Open-delta winding connection","kind":"symbol","abbreviation":"OPEN D","aliases":[],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An open-delta arrangement uses an incomplete delta connection for a specified transformer or measurement purpose.","description":["An open-delta arrangement uses an incomplete delta connection for a specified transformer or measurement purpose. The absent winding or open connection must be visible rather than interpreted as an accidental drawing omission."],"readingNotes":["Identify the actual application and its documented winding arrangement.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show open portion","Name connected terminals","Reference applicable rating or measurement scheme"],"distinction":"Open delta and broken-delta residual-voltage circuits describe different application contexts; the drawing must say which is intended.","facts":[{"label":"Drawing role","value":"Three-phase winding"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","generator"],"artwork":"edu-open-delta-winding-connection","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/open-delta-winding-connection","illustration":"https://eloragrid.ai/library/illustrations/open-delta-winding-connection.svg"},{"slug":"star-winding-connection","name":"Star winding connection","kind":"symbol","abbreviation":"STAR Y","aliases":[],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A star winding joins one end of each phase winding at a common point.","description":["A star winding joins one end of each phase winding at a common point. The external phase terminals and the common point determine the winding topology."],"readingNotes":["Check whether the common point is internal or brought out as a neutral terminal.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show phase winding ends","Identify common point","Reference terminal designations"],"distinction":"A drawn star point does not mean that it is accessible for external connection.","facts":[{"label":"Drawing role","value":"Three-phase winding"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","generator"],"artwork":"edu-star-winding-connection","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/star-winding-connection","illustration":"https://eloragrid.ai/library/illustrations/star-winding-connection.svg"},{"slug":"star-winding-with-accessible-neutral","name":"Star winding with accessible neutral","kind":"symbol","abbreviation":"Y N","aliases":[],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An accessible-neutral star winding brings the common star point to a documented terminal.","description":["An accessible-neutral star winding brings the common star point to a documented terminal. Earthing and neutral loading details are supplied separately by the system design."],"readingNotes":["Trace the neutral conductor separately from protective earth.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label neutral terminal","Show neutral earthing arrangement","Reference neutral rating"],"distinction":"An accessible neutral is not automatically a protective-earth conductor.","facts":[{"label":"Drawing role","value":"Three-phase winding"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","generator"],"artwork":"edu-star-winding-with-accessible-neutral","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/star-winding-with-accessible-neutral","illustration":"https://eloragrid.ai/library/illustrations/star-winding-with-accessible-neutral.svg"},{"slug":"zigzag-winding-connection","name":"Zigzag winding connection","kind":"symbol","abbreviation":"ZIGZAG","aliases":[],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A zigzag winding interconnects portions of phase windings in a specified arrangement.","description":["A zigzag winding interconnects portions of phase windings in a specified arrangement. Its neutral and zero-sequence behaviour depend on the actual transformer connection and ratings."],"readingNotes":["Use the manufacturer's winding diagram to identify all interconnections.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State zigzag designation","Identify neutral point","Reference earthing or transformer duty"],"distinction":"A zigzag winding is different from a three-phase star formed from one winding per phase.","facts":[{"label":"Drawing role","value":"Three-phase winding"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","generator"],"artwork":"edu-zigzag-winding-connection","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/zigzag-winding-connection","illustration":"https://eloragrid.ai/library/illustrations/zigzag-winding-connection.svg"},{"slug":"mechanically-latched-relay-coil","name":"Mechanically latched relay coil","kind":"symbol","abbreviation":"K LATCH","aliases":["HLR1","VLR1"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A mechanically latched relay retains a documented state after the initiating electrical command is removed.","description":["A mechanically latched relay retains a documented state after the initiating electrical command is removed. The schematic needs both the operating and reset mechanism so the retained state can be understood."],"readingNotes":["Identify the reset or unlatching path instead of assuming removal of coil power releases the contacts.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label operating coil","Show reset or unlatch action","Cross-reference retained contacts"],"distinction":"A latched relay retains state; a conventional monostable relay returns when its operating condition is removed.","facts":[{"label":"Drawing role","value":"Relay operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HLR1, VLR1 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-mechanically-latched-relay-coil","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/mechanically-latched-relay-coil","illustration":"https://eloragrid.ai/library/illustrations/mechanically-latched-relay-coil.svg"},{"slug":"relay-reset-coil","name":"Relay reset coil","kind":"symbol","abbreviation":"K RESET","aliases":["HLR2","VLR2"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A reset coil releases or changes the retained state of its associated latching relay.","description":["A reset coil releases or changes the retained state of its associated latching relay. The shared device identity links this coil to the latch mechanism and contacts elsewhere on the schematic."],"readingNotes":["Trace the reset command to the specific retained device.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Match relay tag","State reset coil voltage","Show reset interlocks"],"distinction":"A reset coil is not a second unrelated relay simply because it is drawn on another rung.","facts":[{"label":"Drawing role","value":"Relay operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HLR2, VLR2 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-relay-reset-coil","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/relay-reset-coil","illustration":"https://eloragrid.ai/library/illustrations/relay-reset-coil.svg"},{"slug":"solid-state-relay","name":"Solid-state relay","kind":"symbol","abbreviation":"SSR","aliases":["HCR1SSD","VCR1SSD"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A solid-state relay switches an output through semiconductor circuitry in response to a control input.","description":["A solid-state relay switches an output through semiconductor circuitry in response to a control input. Control isolation, output type and leakage depend on the chosen product."],"readingNotes":["Distinguish the low-power input terminals from the load-side output terminals.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name output AC or DC type","State input operating range","Reference leakage and load limits"],"distinction":"An SSR has no ordinary mechanical contact gap and must not be treated as a disconnector.","facts":[{"label":"Drawing role","value":"Relay operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1SSD, VCR1SSD (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-solid-state-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/solid-state-relay","illustration":"https://eloragrid.ai/library/illustrations/solid-state-relay.svg"},{"slug":"polarised-relay-coil","name":"Polarised relay coil","kind":"symbol","abbreviation":"K POL","aliases":["HCR1POL","VCR1POL"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A polarised relay has operation or a specified response that depends on the documented electrical polarity.","description":["A polarised relay has operation or a specified response that depends on the documented electrical polarity. Its terminal and polarity markings must be preserved when the drawing is rearranged."],"readingNotes":["The device polarity is established by terminal data, not by the left-to-right direction of a rung.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show coil polarity","State operating voltage","Reference contact behaviour"],"distinction":"Polarised relay operation is different from merely fitting a suppression diode to an otherwise ordinary coil.","facts":[{"label":"Drawing role","value":"Relay operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1POL, VCR1POL (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-polarised-relay-coil","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/polarised-relay-coil","illustration":"https://eloragrid.ai/library/illustrations/polarised-relay-coil.svg"},{"slug":"ac-relay-coil","name":"AC relay coil","kind":"symbol","abbreviation":"K AC","aliases":["HCR1AC","VCR1AC"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An AC relay coil is intended for a specified alternating-current control supply.","description":["An AC relay coil is intended for a specified alternating-current control supply. Voltage and frequency form part of its coil rating and cannot be inferred from the relay tag."],"readingNotes":["Identify the actual control-supply frequency and voltage.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State coil voltage and frequency","Label coil terminals","Link contact references"],"distinction":"AC coil suitability does not mean its contacts can switch every AC or DC load.","facts":[{"label":"Drawing role","value":"Relay operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1AC, VCR1AC (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-ac-relay-coil","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/ac-relay-coil","illustration":"https://eloragrid.ai/library/illustrations/ac-relay-coil.svg"},{"slug":"high-speed-relay","name":"High-speed relay","kind":"symbol","abbreviation":"K FAST","aliases":["HCR1HSP","VCR1HSP"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A high-speed relay has a documented operating response intended for duties where relay timing matters.","description":["A high-speed relay has a documented operating response intended for duties where relay timing matters. Schematics need the specific model and circuit role rather than an unqualified speed claim."],"readingNotes":["Read operate and release times under the specified coil and contact conditions.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name relay model","Reference operate and release data","Show controlled circuit"],"distinction":"High-speed classification does not imply a complete protection scheme's total clearing time.","facts":[{"label":"Drawing role","value":"Relay operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1HSP, VCR1HSP (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-high-speed-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/high-speed-relay","illustration":"https://eloragrid.ai/library/illustrations/high-speed-relay.svg"},{"slug":"measuring-relay","name":"Measuring relay","kind":"symbol","abbreviation":"K MEAS","aliases":["HCR1MSR","VCR1MSR"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A measuring relay responds to a measured electrical quantity and issues an output according to its configuration.","description":["A measuring relay responds to a measured electrical quantity and issues an output according to its configuration. Measurement inputs, auxiliary supply and output contacts may be separate terminal groups."],"readingNotes":["Identify the measured quantity before tracing the output contact logic.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label measured input","State auxiliary supply","Reference threshold or setting record"],"distinction":"A measuring relay is not simply a coil powered by the same quantity it measures.","facts":[{"label":"Drawing role","value":"Relay operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1MSR, VCR1MSR (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-measuring-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/measuring-relay","illustration":"https://eloragrid.ai/library/illustrations/measuring-relay.svg"},{"slug":"relay-coil-with-diode-suppression","name":"Relay coil with diode suppression","kind":"symbol","abbreviation":"K DIODE","aliases":["HCR1K33","VCR1K33"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A relay with diode suppression includes a diode associated with its coil to limit the transient on de-energisation.","description":["A relay with diode suppression includes a diode associated with its coil to limit the transient on de-energisation. The diode's documented connection makes control polarity important."],"readingNotes":["Verify the coil and diode polarity using the chosen relay or socket diagram.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Mark coil polarity","Identify integrated suppression","Reference release-time behaviour"],"distinction":"A suppression diode protects the control circuit; it is not a contact-side arc suppressor.","facts":[{"label":"Drawing role","value":"Relay operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1K33, VCR1K33 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-relay-suppression","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-relay-coil-with-diode-suppression","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/relay-coil-with-diode-suppression","illustration":"https://eloragrid.ai/library/illustrations/relay-coil-with-diode-suppression.svg"},{"slug":"relay-coil-with-diode-and-led","name":"Relay coil with diode and LED","kind":"symbol","abbreviation":"K D LED","aliases":["HCR1K35","VCR1K35"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A relay assembly with diode and LED combines coil transient suppression and a visible energisation indicator.","description":["A relay assembly with diode and LED combines coil transient suppression and a visible energisation indicator. The schematic must identify both auxiliary functions without treating the LED as proof of contact movement."],"readingNotes":["The indicator reports its own electrical condition, not necessarily the mechanical contact state.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show coil polarity","Identify indicator circuit","Reference actual contact feedback"],"distinction":"An illuminated coil indicator is different from an auxiliary contact confirming device position.","facts":[{"label":"Drawing role","value":"Relay operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1K35, VCR1K35 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-relay-suppression","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-relay-coil-with-diode-and-led","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/relay-coil-with-diode-and-led","illustration":"https://eloragrid.ai/library/illustrations/relay-coil-with-diode-and-led.svg"},{"slug":"relay-coil-with-capacitor-suppression","name":"Relay coil with capacitor suppression","kind":"symbol","abbreviation":"K CAP","aliases":["HCR1K37","VCR1K37"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A relay with a capacitor suppression element includes a documented capacitive network associated with the coil.","description":["A relay with a capacitor suppression element includes a documented capacitive network associated with the coil. Its connection and effect on switching are product-dependent."],"readingNotes":["Check the coil voltage type and suppression configuration before substituting a relay assembly.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify capacitor network","State coil rating","Reference approved suppression module"],"distinction":"Capacitor suppression is different from the coil's operating function and from a motor run capacitor.","facts":[{"label":"Drawing role","value":"Relay operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1K37, VCR1K37 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-relay-suppression","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-relay-coil-with-capacitor-suppression","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/relay-coil-with-capacitor-suppression","illustration":"https://eloragrid.ai/library/illustrations/relay-coil-with-capacitor-suppression.svg"},{"slug":"relay-coil-with-rc-suppression","name":"Relay coil with RC suppression","kind":"symbol","abbreviation":"K RC","aliases":["HCR1K39","VCR1K39"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A relay RC suppression network uses resistance and capacitance associated with the coil circuit.","description":["A relay RC suppression network uses resistance and capacitance associated with the coil circuit. It provides a documented transient-control function with characteristics distinct from diode suppression."],"readingNotes":["Confirm whether the RC module is internal, in the socket or separately wired.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show network location","State coil supply","Reference compatible suppression unit"],"distinction":"RC suppression and diode suppression are not interchangeable annotations for every supply type.","facts":[{"label":"Drawing role","value":"Relay operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1K39, VCR1K39 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-relay-suppression","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-relay-coil-with-rc-suppression","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/relay-coil-with-rc-suppression","illustration":"https://eloragrid.ai/library/illustrations/relay-coil-with-rc-suppression.svg"},{"slug":"counter-relay-with-manual-reset","name":"Counter relay with manual reset","kind":"symbol","abbreviation":"COUNT MAN","aliases":["HCR1CNM","VCR1CNM"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A manually reset counter relay records qualifying events and retains a count until the documented reset action.","description":["A manually reset counter relay records qualifying events and retains a count until the documented reset action. Event input, count condition and reset control should be identifiable on the drawing."],"readingNotes":["Count events at the configured input rather than assuming every power cycle is an event.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label count input","Show manual reset","Reference preset and output function"],"distinction":"A counter accumulates events; a timer measures duration.","facts":[{"label":"Drawing role","value":"Relay operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1CNM, VCR1CNM (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-counters","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-counter-relay-with-manual-reset","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/counter-relay-with-manual-reset","illustration":"https://eloragrid.ai/library/illustrations/counter-relay-with-manual-reset.svg"},{"slug":"counter-relay-with-electrical-reset","name":"Counter relay with electrical reset","kind":"symbol","abbreviation":"COUNT ELEC","aliases":["HCR1CNE","VCR1CNE"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An electrically reset counter relay has a separate reset command or documented electronic reset mechanism.","description":["An electrically reset counter relay has a separate reset command or documented electronic reset mechanism. Schematics need the count and reset paths to remain distinct."],"readingNotes":["Establish reset priority where count and reset signals can occur together.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify count terminal","Identify reset terminal","Reference output and reset sequence"],"distinction":"Electrical reset changes the counter state; it is not the same as disconnecting the measured circuit.","facts":[{"label":"Drawing role","value":"Relay operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1CNE, VCR1CNE (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-counters","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-counter-relay-with-electrical-reset","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/counter-relay-with-electrical-reset","illustration":"https://eloragrid.ai/library/illustrations/counter-relay-with-electrical-reset.svg"},{"slug":"non-resettable-counter-relay","name":"Non-resettable counter relay","kind":"symbol","abbreviation":"COUNT TOTAL","aliases":["HCR1CNN","VCR1CNN"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A non-resettable counter records events without a normal user reset function.","description":["A non-resettable counter records events without a normal user reset function. It is used where the total event history is part of the documented equipment indication."],"readingNotes":["Check the specified retention behaviour when the auxiliary supply is lost.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Define qualifying event","State counter supply","Reference retention and rollover"],"distinction":"A totalising counter is different from a preset counter intended to be reset each operating cycle.","facts":[{"label":"Drawing role","value":"Relay operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1CNN, VCR1CNN (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-counters","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-non-resettable-counter-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/non-resettable-counter-relay","illustration":"https://eloragrid.ai/library/illustrations/non-resettable-counter-relay.svg"},{"slug":"on-delay-timer-relay","name":"On-delay timer relay","kind":"symbol","abbreviation":"TON","aliases":["HTD1N","VTD1N"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An on-delay timer postpones a specified output transition after its timing condition becomes active.","description":["An on-delay timer postpones a specified output transition after its timing condition becomes active. The timing input, auxiliary supply and delayed output must be distinguished in the schematic."],"readingNotes":["Read the timing diagram to establish when the interval starts and how interruption resets it.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show initiating condition","State time setting","Link delayed output contact"],"distinction":"On-delay postpones the specified transition on operation; off-delay postpones a transition after removal of the initiating condition.","facts":[{"label":"Drawing role","value":"Timed operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HTD1N, VTD1N (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-timers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-closed-contact"],"artwork":"edu-on-delay-timer-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/on-delay-timer-relay","illustration":"https://eloragrid.ai/library/illustrations/on-delay-timer-relay.svg"},{"slug":"off-delay-timer-relay","name":"Off-delay timer relay","kind":"symbol","abbreviation":"TOFF","aliases":["HTD1F","VTD1F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An off-delay timer holds a specified output condition for a documented period after its initiating condition is removed.","description":["An off-delay timer holds a specified output condition for a documented period after its initiating condition is removed. Its auxiliary power requirements depend on the selected timer."],"readingNotes":["Determine whether the device needs a continuing supply to complete the delay.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show trigger removal condition","State delay interval","Reference supply retention requirements"],"distinction":"Off-delay is not the same as a minimum pulse duration generated when the trigger first arrives.","facts":[{"label":"Drawing role","value":"Timed operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HTD1F, VTD1F (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-timers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-closed-contact"],"artwork":"edu-off-delay-timer-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/off-delay-timer-relay","illustration":"https://eloragrid.ai/library/illustrations/off-delay-timer-relay.svg"},{"slug":"on-delay-normally-open-contact","name":"On-delay normally-open contact","kind":"symbol","abbreviation":"TON NO","aliases":[],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An on-delay NO contact changes from its unoperated open state only after the associated timing condition has persisted for the documented delay.","description":["An on-delay NO contact changes from its unoperated open state only after the associated timing condition has persisted for the documented delay. The contact tag links it to the timer element."],"readingNotes":["The delay applies to the indicated operating transition, not automatically to both directions.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Match timer tag","Label delayed closing","Reference reset behaviour"],"distinction":"A timed contact adds transition information to the basic normally-open state.","facts":[{"label":"Drawing role","value":"Timed operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-timers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-closed-contact"],"artwork":"edu-on-delay-normally-open-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/on-delay-normally-open-contact","illustration":"https://eloragrid.ai/library/illustrations/on-delay-normally-open-contact.svg"},{"slug":"on-delay-normally-closed-contact","name":"On-delay normally-closed contact","kind":"symbol","abbreviation":"TON NC","aliases":[],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An on-delay NC contact opens after the associated timing condition has persisted for its documented interval.","description":["An on-delay NC contact opens after the associated timing condition has persisted for its documented interval. Its unoperated closed state is read separately from the timing annotation."],"readingNotes":["Trace what happens to the downstream permissive while the delay is running.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Match timing device","Label delayed opening","State contact terminal numbers"],"distinction":"An on-delay NC contact is not an off-delay NO contact even if a sequence produces similar output timing.","facts":[{"label":"Drawing role","value":"Timed operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-timers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-closed-contact"],"artwork":"edu-on-delay-normally-closed-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/on-delay-normally-closed-contact","illustration":"https://eloragrid.ai/library/illustrations/on-delay-normally-closed-contact.svg"},{"slug":"off-delay-normally-open-contact","name":"Off-delay normally-open contact","kind":"symbol","abbreviation":"TOFF NO","aliases":[],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An off-delay NO contact retains the documented operated state for an interval after the timer trigger is removed.","description":["An off-delay NO contact retains the documented operated state for an interval after the timer trigger is removed. The actual timer timing chart establishes the switching sequence."],"readingNotes":["Check the output's state during supply loss separately from normal trigger removal.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify timer reference","Label delayed release","Reference supply-loss state"],"distinction":"Off-delay release requires a stated sequence; the NO label alone only identifies the reference contact state.","facts":[{"label":"Drawing role","value":"Timed operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-timers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-closed-contact"],"artwork":"edu-off-delay-normally-open-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/off-delay-normally-open-contact","illustration":"https://eloragrid.ai/library/illustrations/off-delay-normally-open-contact.svg"},{"slug":"off-delay-normally-closed-contact","name":"Off-delay normally-closed contact","kind":"symbol","abbreviation":"TOFF NC","aliases":[],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An off-delay NC contact returns to its documented normally-closed state after the delay following removal of the timing trigger.","description":["An off-delay NC contact returns to its documented normally-closed state after the delay following removal of the timing trigger. Its role is read from the complete timer and contact circuit."],"readingNotes":["Identify whether this delayed return affects a permissive, indication or another timer.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Link timer trigger","Show delayed return","State configured interval"],"distinction":"Contact polarity and timing direction are separate pieces of information.","facts":[{"label":"Drawing role","value":"Timed operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-timers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["relay-coil","normally-closed-contact"],"artwork":"edu-off-delay-normally-closed-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/off-delay-normally-closed-contact","illustration":"https://eloragrid.ai/library/illustrations/off-delay-normally-closed-contact.svg"},{"slug":"maintained-normally-open-contact","name":"Maintained normally-open contact","kind":"symbol","abbreviation":"NO HOLD","aliases":["HCR2122F","VCR2122F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A maintained NO contact retains the actuated closed position according to its mechanism or control arrangement.","description":["A maintained NO contact retains the actuated closed position according to its mechanism or control arrangement. The drawing needs the release or reset action in addition to the unactuated contact state."],"readingNotes":["Identify how the maintained position is released.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show reference state","Link retaining mechanism","Document release action"],"distinction":"Maintained operation describes retention, whereas normally open describes the reference contact state.","facts":[{"label":"Drawing role","value":"Contact state"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR2122F, VCR2122F (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["normally-open-contact","normally-closed-contact"],"artwork":"edu-maintained-normally-open-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/maintained-normally-open-contact","illustration":"https://eloragrid.ai/library/illustrations/maintained-normally-open-contact.svg"},{"slug":"maintained-normally-closed-contact","name":"Maintained normally-closed contact","kind":"symbol","abbreviation":"NC HOLD","aliases":["HCR2222F","VCR2222F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A maintained NC contact retains its actuated position until the documented return action occurs.","description":["A maintained NC contact retains its actuated position until the documented return action occurs. The unactuated closed state and retained operated state must both be understood."],"readingNotes":["Trace the specified reset action before evaluating the next operating cycle.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show reference condition","Identify retained position","Cross-reference reset control"],"distinction":"A maintained contact is not necessarily an electrically latching relay.","facts":[{"label":"Drawing role","value":"Contact state"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR2222F, VCR2222F (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["normally-open-contact","normally-closed-contact"],"artwork":"edu-maintained-normally-closed-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/maintained-normally-closed-contact","illustration":"https://eloragrid.ai/library/illustrations/maintained-normally-closed-contact.svg"},{"slug":"manually-unlatched-no-contact","name":"Manually unlatched NO contact","kind":"symbol","abbreviation":"NO UNLATCH","aliases":["HCR2121F","VCR2121F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A manually unlatched NO contact includes a mechanical retaining action released by a documented manual operation.","description":["A manually unlatched NO contact includes a mechanical retaining action released by a documented manual operation. Its schematic modifier explains why removal of an initiating signal may not restore the initial state."],"readingNotes":["Follow the manual reset to the retaining device tag.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify latch mechanism","Show manual unlatch","Reference contact terminals"],"distinction":"Manual unlatching concerns the mechanism, not the contact's load interrupting rating.","facts":[{"label":"Drawing role","value":"Contact state"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR2121F, VCR2121F (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["normally-open-contact","normally-closed-contact"],"artwork":"edu-manually-unlatched-no-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/manually-unlatched-no-contact","illustration":"https://eloragrid.ai/library/illustrations/manually-unlatched-no-contact.svg"},{"slug":"manually-unlatched-nc-contact","name":"Manually unlatched NC contact","kind":"symbol","abbreviation":"NC UNLATCH","aliases":["HCR2221F","VCR2221F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A manually unlatched NC contact has a mechanical retained state and a documented manual release.","description":["A manually unlatched NC contact has a mechanical retained state and a documented manual release. Its reference state is closed but the retained operated position must be stated."],"readingNotes":["Confirm which contact position the mechanism retains.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State reference and retained states","Identify manual release","Link associated device"],"distinction":"A mechanical retention marker must not be confused with a delayed-return timer marker.","facts":[{"label":"Drawing role","value":"Contact state"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR2221F, VCR2221F (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["normally-open-contact","normally-closed-contact"],"artwork":"edu-manually-unlatched-nc-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/manually-unlatched-nc-contact","illustration":"https://eloragrid.ai/library/illustrations/manually-unlatched-nc-contact.svg"},{"slug":"early-make-normally-open-contact","name":"Early-make normally-open contact","kind":"symbol","abbreviation":"NO EARLY","aliases":["HCR217F","VCR217F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An early-make NO contact closes earlier in the mechanism sequence than specified associated contacts.","description":["An early-make NO contact closes earlier in the mechanism sequence than specified associated contacts. The relative sequence is meaningful only when the linked contacts and common operator are identified."],"readingNotes":["Compare the contact timing against the other poles of the same device.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Link common operator","Identify comparison contacts","Document switching sequence"],"distinction":"Early make is a relative operating sequence, not a fixed millisecond time delay.","facts":[{"label":"Drawing role","value":"Contact state"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR217F, VCR217F (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["normally-open-contact","normally-closed-contact"],"artwork":"edu-early-make-normally-open-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/early-make-normally-open-contact","illustration":"https://eloragrid.ai/library/illustrations/early-make-normally-open-contact.svg"},{"slug":"late-make-normally-open-contact","name":"Late-make normally-open contact","kind":"symbol","abbreviation":"NO LATE","aliases":["HCR218F","VCR218F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A late-make NO contact closes later in a documented mechanism sequence than associated contacts.","description":["A late-make NO contact closes later in a documented mechanism sequence than associated contacts. The annotation must remain linked to the common device when contacts are drawn on different sheets."],"readingNotes":["Establish the sequence from the device documentation rather than from symbol placement.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Match common device tag","Identify late closing transition","Reference mechanism sequence"],"distinction":"Late make differs from an electrically timed on-delay contact.","facts":[{"label":"Drawing role","value":"Contact state"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR218F, VCR218F (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["normally-open-contact","normally-closed-contact"],"artwork":"edu-late-make-normally-open-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/late-make-normally-open-contact","illustration":"https://eloragrid.ai/library/illustrations/late-make-normally-open-contact.svg"},{"slug":"early-break-normally-closed-contact","name":"Early-break normally-closed contact","kind":"symbol","abbreviation":"NC EARLY","aliases":["HCR227F","VCR227F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An early-break NC contact opens earlier in a documented mechanical sequence than associated contacts.","description":["An early-break NC contact opens earlier in a documented mechanical sequence than associated contacts. It may participate in interlocks whose operation depends on this order."],"readingNotes":["Determine which other contact transitions are used as the reference sequence.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Link common operator","Label early opening","Reference contact sequence"],"distinction":"Early break is a mechanical sequence annotation, not an instantaneous protection threshold.","facts":[{"label":"Drawing role","value":"Contact state"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR227F, VCR227F (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["normally-open-contact","normally-closed-contact"],"artwork":"edu-early-break-normally-closed-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/early-break-normally-closed-contact","illustration":"https://eloragrid.ai/library/illustrations/early-break-normally-closed-contact.svg"},{"slug":"late-break-normally-closed-contact","name":"Late-break normally-closed contact","kind":"symbol","abbreviation":"NC LATE","aliases":["HCR228F","VCR228F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A late-break NC contact opens later in the documented operating sequence than specified associated contacts.","description":["A late-break NC contact opens later in the documented operating sequence than specified associated contacts. The function requires a common-device reference and a sequence description."],"readingNotes":["Trace the retained circuit path while other contacts have already changed state.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify linked contacts","State late-opening order","Reference device sequence"],"distinction":"A late-break contact and an off-delay contact achieve delay by different mechanisms.","facts":[{"label":"Drawing role","value":"Contact state"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR228F, VCR228F (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-contacts","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["normally-open-contact","normally-closed-contact"],"artwork":"edu-late-break-normally-closed-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/late-break-normally-closed-contact","illustration":"https://eloragrid.ai/library/illustrations/late-break-normally-closed-contact.svg"},{"slug":"make-before-break-changeover-contact","name":"Make-before-break changeover contact","kind":"symbol","abbreviation":"MBB","aliases":["HSW1SC7_F","VSW1SC7_F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A make-before-break changeover contact establishes the next path before releasing the previous path during its documented transfer.","description":["A make-before-break changeover contact establishes the next path before releasing the previous path during its documented transfer. The temporary overlap must be understood for the connected circuits."],"readingNotes":["Identify any circuits that would be interconnected during the overlap.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label common and throw terminals","State overlap sequence","Reference connected-circuit compatibility"],"distinction":"A break-before-make transfer opens the previous path before establishing the next.","facts":[{"label":"Drawing role","value":"Contact state"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HSW1SC7_F, VSW1SC7_F (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["normally-open-contact","normally-closed-contact"],"artwork":"edu-make-before-break-changeover-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/make-before-break-changeover-contact","illustration":"https://eloragrid.ai/library/illustrations/make-before-break-changeover-contact.svg"},{"slug":"motor-overload-trip-nc-contact","name":"Motor overload trip NC contact","kind":"symbol","abbreviation":"OL NC","aliases":["HOL22","VOL22"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An overload trip NC contact opens on the documented overload relay operation.","description":["An overload trip NC contact opens on the documented overload relay operation. It is commonly wired in the motor-control path while the overload sensing elements belong to the power circuit."],"readingNotes":["Use the overload device tag to link sensing and control-contact representations.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify overload relay","State contact terminals","Show reset and trip logic"],"distinction":"The auxiliary overload contact interrupts a control path; it does not itself carry the motor feeder current.","facts":[{"label":"Drawing role","value":"Contact state"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HOL22, VOL22 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-motor-control","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["normally-open-contact","normally-closed-contact"],"artwork":"edu-motor-overload-trip-nc-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/motor-overload-trip-nc-contact","illustration":"https://eloragrid.ai/library/illustrations/motor-overload-trip-nc-contact.svg"},{"slug":"motor-overload-alarm-no-contact","name":"Motor overload alarm NO contact","kind":"symbol","abbreviation":"OL NO","aliases":["HOL21","VOL21"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An overload alarm NO contact closes on the documented overload relay operation.","description":["An overload alarm NO contact closes on the documented overload relay operation. The schematic identifies the alarm or feedback path independently of the motor-stopping contact."],"readingNotes":["Verify the contact behaviour after reset and after loss of auxiliary supply.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Link overload device","Identify alarm destination","Reference contact terminal pair"],"distinction":"A trip alarm contact is different from a contactor position indication contact.","facts":[{"label":"Drawing role","value":"Contact state"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HOL21, VOL21 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-motor-control","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["normally-open-contact","normally-closed-contact"],"artwork":"edu-motor-overload-alarm-no-contact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/motor-overload-alarm-no-contact","illustration":"https://eloragrid.ai/library/illustrations/motor-overload-alarm-no-contact.svg"},{"slug":"illuminated-normally-open-pushbutton","name":"Illuminated normally-open pushbutton","kind":"symbol","abbreviation":"PB NO LAMP","aliases":["HPB11S75","VPB11S75"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An illuminated NO pushbutton combines a manual normally-open contact function with an indication lamp.","description":["An illuminated NO pushbutton combines a manual normally-open contact function with an indication lamp. The lamp circuit is drawn or referenced separately because its indication need not follow the contact state."],"readingNotes":["Trace the lamp supply independently from the pushbutton contact circuit.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify contact terminals","Identify lamp supply and colour","State the indicated condition"],"distinction":"An illuminated actuator does not make its contact a lamp-test contact.","facts":[{"label":"Drawing role","value":"Manual operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPB11S75, VPB11S75 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-illuminated-pushbuttons","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["pushbutton-no","pushbutton-nc"],"artwork":"edu-illuminated-normally-open-pushbutton","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/illuminated-normally-open-pushbutton","illustration":"https://eloragrid.ai/library/illustrations/illuminated-normally-open-pushbutton.svg"},{"slug":"illuminated-normally-closed-pushbutton","name":"Illuminated normally-closed pushbutton","kind":"symbol","abbreviation":"PB NC LAMP","aliases":["HPB12S75","VPB12S75"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An illuminated NC pushbutton combines a normally-closed manual contact with a lamp in the operator assembly.","description":["An illuminated NC pushbutton combines a normally-closed manual contact with a lamp in the operator assembly. Contact operation and illumination can have different circuit sources."],"readingNotes":["Read the contact's unoperated state without assuming that illumination means it is actuated.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State lamp voltage","Name indicated condition","Reference contact terminal pair"],"distinction":"A normally-closed contact function is independent of the lamp's on or off state.","facts":[{"label":"Drawing role","value":"Manual operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPB12S75, VPB12S75 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-illuminated-pushbuttons","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["pushbutton-no","pushbutton-nc"],"artwork":"edu-illuminated-normally-closed-pushbutton","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/illuminated-normally-closed-pushbutton","illustration":"https://eloragrid.ai/library/illustrations/illuminated-normally-closed-pushbutton.svg"},{"slug":"maintained-normally-open-pushbutton","name":"Maintained normally-open pushbutton","kind":"symbol","abbreviation":"PB NO HOLD","aliases":["HPB11S76","VPB11S76"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A maintained NO pushbutton stays in its actuated condition until the documented return operation.","description":["A maintained NO pushbutton stays in its actuated condition until the documented return operation. The control sequence must account for the retained input rather than assuming a momentary pulse."],"readingNotes":["Identify the release method and any reset interlock.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State retained position","Document return action","Show contact reference"],"distinction":"A maintained pushbutton is different from a spring-return momentary operator.","facts":[{"label":"Drawing role","value":"Manual operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPB11S76, VPB11S76 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-illuminated-pushbuttons","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["pushbutton-no","pushbutton-nc"],"artwork":"edu-maintained-normally-open-pushbutton","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/maintained-normally-open-pushbutton","illustration":"https://eloragrid.ai/library/illustrations/maintained-normally-open-pushbutton.svg"},{"slug":"maintained-normally-closed-pushbutton","name":"Maintained normally-closed pushbutton","kind":"symbol","abbreviation":"PB NC HOLD","aliases":["HPB12S76","VPB12S76"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A maintained NC pushbutton retains its actuated open state until the documented return action.","description":["A maintained NC pushbutton retains its actuated open state until the documented return action. This affects permissive and stopping circuits that depend on contact continuity."],"readingNotes":["Determine how the operator returns to the reference position.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label retained state","Show contact terminal numbers","Reference return mechanism"],"distinction":"Maintained NC operation does not alone establish an emergency-stop safety function.","facts":[{"label":"Drawing role","value":"Manual operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPB12S76, VPB12S76 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-illuminated-pushbuttons","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["pushbutton-no","pushbutton-nc"],"artwork":"edu-maintained-normally-closed-pushbutton","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/maintained-normally-closed-pushbutton","illustration":"https://eloragrid.ai/library/illustrations/maintained-normally-closed-pushbutton.svg"},{"slug":"key-operated-normally-open-switch","name":"Key-operated normally-open switch","kind":"symbol","abbreviation":"KEY NO","aliases":["HPB11KS","VPB11KS"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A key-operated NO switch closes a contact through an authorised key mechanism.","description":["A key-operated NO switch closes a contact through an authorised key mechanism. The schematic needs the operating positions and any key-removal restrictions to explain access control."],"readingNotes":["Check where the key can be inserted or removed.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label positions","Identify key-removal state","Show contact terminals"],"distinction":"A key switch restricts operation but is not automatically an electrical isolation or safety device.","facts":[{"label":"Drawing role","value":"Manual operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPB11KS, VPB11KS (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["pushbutton-no","pushbutton-nc"],"artwork":"edu-key-operated-normally-open-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/key-operated-normally-open-switch","illustration":"https://eloragrid.ai/library/illustrations/key-operated-normally-open-switch.svg"},{"slug":"key-operated-normally-closed-switch","name":"Key-operated normally-closed switch","kind":"symbol","abbreviation":"KEY NC","aliases":["HPB12KS","VPB12KS"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A key-operated NC switch opens its reference closed contact through the key mechanism.","description":["A key-operated NC switch opens its reference closed contact through the key mechanism. Its access and switching functions must be documented separately."],"readingNotes":["Read the reference position from the operator schedule.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Define normal key position","State contact action","Reference key-removal restrictions"],"distinction":"NC identifies the contact reference state, not a guarantee of tamper-proof control.","facts":[{"label":"Drawing role","value":"Manual operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPB12KS, VPB12KS (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["pushbutton-no","pushbutton-nc"],"artwork":"edu-key-operated-normally-closed-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/key-operated-normally-closed-switch","illustration":"https://eloragrid.ai/library/illustrations/key-operated-normally-closed-switch.svg"},{"slug":"latched-key-operated-switch","name":"Latched key-operated switch","kind":"symbol","abbreviation":"KEY HOLD","aliases":["HPB11KSL","VPB11KSL"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A latched key-operated switch retains its commanded position according to the selected mechanism.","description":["A latched key-operated switch retains its commanded position according to the selected mechanism. The drawing should specify how the latched position is released and where the key is removable."],"readingNotes":["Separate the mechanical retention from any electrical seal-in circuit.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["List stable positions","Show reset action","Document key-removal constraints"],"distinction":"Mechanically latched operation is different from a relay holding circuit.","facts":[{"label":"Drawing role","value":"Manual operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPB11KSL, VPB11KSL (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["pushbutton-no","pushbutton-nc"],"artwork":"edu-latched-key-operated-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/latched-key-operated-switch","illustration":"https://eloragrid.ai/library/illustrations/latched-key-operated-switch.svg"},{"slug":"pull-cord-switch","name":"Pull-cord switch","kind":"symbol","abbreviation":"PULL CORD","aliases":["HPC12","VPC12"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A pull-cord switch converts a cord-operated mechanical action into an electrical contact change.","description":["A pull-cord switch converts a cord-operated mechanical action into an electrical contact change. The control drawing records the contact function, while the layout records the cord route and actuator placement."],"readingNotes":["State the normal condition and how operation is reset.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify contact action","Reference cord arrangement","Show reset mechanism"],"distinction":"A generic pull-cord symbol does not certify an emergency-stop function.","facts":[{"label":"Drawing role","value":"Manual operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPC12, VPC12 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["pushbutton-no","pushbutton-nc"],"artwork":"edu-pull-cord-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/pull-cord-switch","illustration":"https://eloragrid.ai/library/illustrations/pull-cord-switch.svg"},{"slug":"foot-operated-switch","name":"Foot-operated switch","kind":"symbol","abbreviation":"FOOT","aliases":["HFT11","VFT11"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A foot-operated switch uses a pedal mechanism to change an electrical contact.","description":["A foot-operated switch uses a pedal mechanism to change an electrical contact. Its schematic should state the contact state and whether the operator is momentary or retained."],"readingNotes":["Identify the pedal's return action and any guard shown by the equipment specification.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State contact type","Reference return mechanism","Identify connected control function"],"distinction":"Foot actuation describes the operator, not the safety category of the circuit.","facts":[{"label":"Drawing role","value":"Manual operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HFT11, VFT11 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["pushbutton-no","pushbutton-nc"],"artwork":"edu-foot-operated-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/foot-operated-switch","illustration":"https://eloragrid.ai/library/illustrations/foot-operated-switch.svg"},{"slug":"lever-operated-switch","name":"Lever-operated switch","kind":"symbol","abbreviation":"LEVER","aliases":["HPB11LS","VPB11LS"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A lever-operated switch changes contact state through a manually operated lever.","description":["A lever-operated switch changes contact state through a manually operated lever. The lever's travel, stable positions and return behaviour are part of the operator schedule."],"readingNotes":["Compare the contact schedule to each lever position.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label operator positions","State momentary or maintained operation","Identify contact terminals"],"distinction":"Lever actuation is different from a lever limit switch driven by equipment movement.","facts":[{"label":"Drawing role","value":"Manual operation"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPB11LS, VPB11LS (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["pushbutton-no","pushbutton-nc"],"artwork":"edu-lever-operated-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/lever-operated-switch","illustration":"https://eloragrid.ai/library/illustrations/lever-operated-switch.svg"},{"slug":"three-position-maintained-selector","name":"Three-position maintained selector","kind":"symbol","abbreviation":"SEL 3 HOLD","aliases":["HSS113","VSS113"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A three-position maintained selector stays at the selected position until manually moved.","description":["A three-position maintained selector stays at the selected position until manually moved. The schematic needs a contact-state schedule covering all three positions so modes such as local, off and remote are unambiguous."],"readingNotes":["Read each contact against the complete position table rather than the operator label alone.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name all positions","Provide contact-state table","Cross-reference terminal numbers"],"distinction":"Three maintained positions differ from a selector that spring-returns to centre.","facts":[{"label":"Drawing role","value":"Position selection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HSS113, VSS113 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-selector-three","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["selector-switch","changeover-contact"],"artwork":"edu-three-position-maintained-selector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-position-maintained-selector","illustration":"https://eloragrid.ai/library/illustrations/three-position-maintained-selector.svg"},{"slug":"three-position-selector-returning-from-left","name":"Three-position selector returning from left","kind":"symbol","abbreviation":"SEL 3 LRET","aliases":["HSS113L","VSS113L"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This three-position selector has a documented spring return from its left position.","description":["This three-position selector has a documented spring return from its left position. Other positions may be stable or have different behaviour, so the return direction must remain explicit."],"readingNotes":["Establish the rest position and the state after the left-hand command is released.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label rest position","Show return direction","Provide position/contact schedule"],"distinction":"Return from left is not equivalent to return from both outer positions.","facts":[{"label":"Drawing role","value":"Position selection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HSS113L, VSS113L (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-selector-three","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["selector-switch","changeover-contact"],"artwork":"edu-three-position-selector-returning-from-left","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-position-selector-returning-from-left","illustration":"https://eloragrid.ai/library/illustrations/three-position-selector-returning-from-left.svg"},{"slug":"three-position-selector-returning-from-right","name":"Three-position selector returning from right","kind":"symbol","abbreviation":"SEL 3 RRET","aliases":["HSS113R","VSS113R"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This three-position selector returns from its right position according to its mechanism.","description":["This three-position selector returns from its right position according to its mechanism. The mode or command schedule needs to state which positions are momentary and which are retained."],"readingNotes":["Trace the right-hand command after the operator releases the handle.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label stable positions","Show right-side return","Identify affected contacts"],"distinction":"The printed right position depends on the defined front view of the operator.","facts":[{"label":"Drawing role","value":"Position selection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HSS113R, VSS113R (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-selector-three","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["selector-switch","changeover-contact"],"artwork":"edu-three-position-selector-returning-from-right","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-position-selector-returning-from-right","illustration":"https://eloragrid.ai/library/illustrations/three-position-selector-returning-from-right.svg"},{"slug":"three-position-centre-return-selector","name":"Three-position centre-return selector","kind":"symbol","abbreviation":"SEL 3 CRET","aliases":["HSS113B","VSS113B"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A centre-return selector returns from both outer positions to its documented central rest position.","description":["A centre-return selector returns from both outer positions to its documented central rest position. It can issue opposite momentary commands without retaining either outer position."],"readingNotes":["The centre rest position still needs a defined contact state.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name centre condition","Identify both momentary commands","State contact schedule"],"distinction":"Centre return describes the mechanism; centre off describes a contact condition.","facts":[{"label":"Drawing role","value":"Position selection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HSS113B, VSS113B (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-selector-three","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["selector-switch","changeover-contact"],"artwork":"edu-three-position-centre-return-selector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-position-centre-return-selector","illustration":"https://eloragrid.ai/library/illustrations/three-position-centre-return-selector.svg"},{"slug":"three-position-key-selector","name":"Three-position key selector","kind":"symbol","abbreviation":"KEY SEL 3","aliases":["HSS11S40","VSS11S40"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A three-position key selector combines position selection with a key-operated mechanism.","description":["A three-position key selector combines position selection with a key-operated mechanism. Stable positions, return behaviour and key-removal conditions are all required for a complete control description."],"readingNotes":["Do not assume that a removable key is allowed in every selected position.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["List positions","State key-removal conditions","Cross-reference contact schedule"],"distinction":"Key operation adds access control to a selector; it does not change its electrical contact ratings.","facts":[{"label":"Drawing role","value":"Position selection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HSS11S40, VSS11S40 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-selector-three","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["selector-switch","changeover-contact"],"artwork":"edu-three-position-key-selector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-position-key-selector","illustration":"https://eloragrid.ai/library/illustrations/three-position-key-selector.svg"},{"slug":"four-position-maintained-selector","name":"Four-position maintained selector","kind":"symbol","abbreviation":"SEL 4 HOLD","aliases":["HSS114","VSS114"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A four-position maintained selector provides four stable operating choices.","description":["A four-position maintained selector provides four stable operating choices. Each contact's state across those choices is recorded in a schedule instead of trying to express the complete logic in one contact outline."],"readingNotes":["Verify the sequence and order of all four positions.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name four positions","Provide switching table","Identify common operator tag"],"distinction":"Four positions do not imply four independent contact poles.","facts":[{"label":"Drawing role","value":"Position selection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HSS114, VSS114 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-selector-four","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["selector-switch","changeover-contact"],"artwork":"edu-four-position-maintained-selector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/four-position-maintained-selector","illustration":"https://eloragrid.ai/library/illustrations/four-position-maintained-selector.svg"},{"slug":"four-position-key-selector","name":"Four-position key selector","kind":"symbol","abbreviation":"KEY SEL 4","aliases":["HSS11S46","VSS11S46"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A four-position key selector provides key-controlled selection among four documented positions.","description":["A four-position key selector provides key-controlled selection among four documented positions. The schematic and operator schedule should agree on position numbering and permitted key removal."],"readingNotes":["Check the contact table against the front-panel legend.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Define position order","State key removal","Reference contact terminals"],"distinction":"A keyed four-position operator is different from four separately keyed switches.","facts":[{"label":"Drawing role","value":"Position selection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HSS11S46, VSS11S46 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-selector-four","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["selector-switch","changeover-contact"],"artwork":"edu-four-position-key-selector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/four-position-key-selector","illustration":"https://eloragrid.ai/library/illustrations/four-position-key-selector.svg"},{"slug":"normally-open-limit-switch","name":"Normally-open limit switch","kind":"symbol","abbreviation":"LS NO","aliases":["HLS11","VLS11","NO limit switch"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A normally-open limit switch closes when the documented mechanical travel or position condition actuates it.","description":["A normally-open limit switch closes when the documented mechanical travel or position condition actuates it. It identifies a position input rather than the complete mechanical arrangement."],"readingNotes":["State which equipment position actuates the switch.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name monitored position","Label actuator reference","Show contact terminals"],"distinction":"A limit switch responds to mechanical position; a pushbutton responds to an operator action.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HLS11, VLS11 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-limits","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-normally-open-limit-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/normally-open-limit-switch","illustration":"https://eloragrid.ai/library/illustrations/normally-open-limit-switch.svg"},{"slug":"normally-closed-limit-switch","name":"Normally-closed limit switch","kind":"symbol","abbreviation":"LS NC","aliases":["HLS12","VLS12","NC limit switch"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A normally-closed limit switch opens when the documented mechanical position actuates it.","description":["A normally-closed limit switch opens when the documented mechanical position actuates it. The reference position must be stated so the logic is interpretable during rest and travel."],"readingNotes":["Trace the circuit in both actuated and unactuated states.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Define normal position","Identify actuating travel","Show reset or return condition"],"distinction":"Normally closed does not by itself establish fault detection or a safety function.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HLS12, VLS12 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-limits","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-normally-closed-limit-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/normally-closed-limit-switch","illustration":"https://eloragrid.ai/library/illustrations/normally-closed-limit-switch.svg"},{"slug":"roller-operated-limit-switch","name":"Roller-operated limit switch","kind":"symbol","abbreviation":"LS ROLLER","aliases":["HLS11C","VLS11C"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A roller-operated limit switch transfers equipment motion through a roller actuator to its electrical contacts.","description":["A roller-operated limit switch transfers equipment motion through a roller actuator to its electrical contacts. The schematic names the mechanism while the GA or mechanical detail determines the roller location."],"readingNotes":["Check the actuation direction and travel against the mechanism detail.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify roller position","State contact action","Reference travel and overtravel"],"distinction":"A roller mechanism is different from an electronic proximity sensor.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HLS11C, VLS11C (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-limits","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-roller-operated-limit-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/roller-operated-limit-switch","illustration":"https://eloragrid.ai/library/illustrations/roller-operated-limit-switch.svg"},{"slug":"cam-operated-limit-switch","name":"Cam-operated limit switch","kind":"symbol","abbreviation":"LS CAM","aliases":["HLS11S13","VLS11S13"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A cam-operated limit switch changes its electrical contact state when a defined cam profile reaches the actuator.","description":["A cam-operated limit switch changes its electrical contact state when a defined cam profile reaches the actuator. Its position function depends on the documented cam and mechanism relationship."],"readingNotes":["Link the cam position to the electrical contact schedule.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Reference cam detail","Identify operated contact","State normal mechanism position"],"distinction":"Cam actuation is a mechanical input, not an electrically programmed timer.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HLS11S13, VLS11S13 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-limits","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-cam-operated-limit-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/cam-operated-limit-switch","illustration":"https://eloragrid.ai/library/illustrations/cam-operated-limit-switch.svg"},{"slug":"pressure-switch-no","name":"Pressure switch NO","kind":"symbol","abbreviation":"PS NO","aliases":["HPS11","VPS11"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A pressure-operated NO switch closes when its documented pressure condition actuates the mechanism.","description":["A pressure-operated NO switch closes when its documented pressure condition actuates the mechanism. Increasing or decreasing pressure behaviour must be identified rather than inferred from NO."],"readingNotes":["Specify the actuation direction and reset differential from product data.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label monitored pressure","State operate and reset conditions","Identify contact terminals"],"distinction":"NO is the unactuated contact state; high-pressure or low-pressure describes the process condition.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPS11, VPS11 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-pressure-temperature","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-pressure-switch-no","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/pressure-switch-no","illustration":"https://eloragrid.ai/library/illustrations/pressure-switch-no.svg"},{"slug":"pressure-switch-nc","name":"Pressure switch NC","kind":"symbol","abbreviation":"PS NC","aliases":["HPS12","VPS12"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A pressure-operated NC switch opens under its documented actuation condition.","description":["A pressure-operated NC switch opens under its documented actuation condition. Pressure threshold, reset behaviour and reference state are separate drawing annotations."],"readingNotes":["Read the pressure direction from the selected switch specification.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify pressure connection","Record operate and reset data","Show contact logic"],"distinction":"An NC pressure switch is different from a pressure transmitter producing a continuous analog signal.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPS12, VPS12 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-pressure-temperature","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-pressure-switch-nc","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/pressure-switch-nc","illustration":"https://eloragrid.ai/library/illustrations/pressure-switch-nc.svg"},{"slug":"temperature-switch-no","name":"Temperature switch NO","kind":"symbol","abbreviation":"TS NO","aliases":["HTS11","VTS11"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A temperature-operated NO switch changes from open to closed under its specified actuation condition.","description":["A temperature-operated NO switch changes from open to closed under its specified actuation condition. The drawing must identify the sensed location and temperature direction."],"readingNotes":["Do not assume a normally-open contact always means rising-temperature alarm.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name sensed location","State operating temperature and direction","Reference reset behaviour"],"distinction":"A temperature switch provides a discrete contact state; an RTD provides a resistance measurement.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HTS11, VTS11 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-pressure-temperature","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-temperature-switch-no","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/temperature-switch-no","illustration":"https://eloragrid.ai/library/illustrations/temperature-switch-no.svg"},{"slug":"temperature-switch-nc","name":"Temperature switch NC","kind":"symbol","abbreviation":"TS NC","aliases":["HTS12","VTS12"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A temperature-operated NC switch opens under a documented thermal condition.","description":["A temperature-operated NC switch opens under a documented thermal condition. Schematics for heaters, fans and equipment trips need the operating threshold and reference state."],"readingNotes":["Identify automatic reset or manual reset where the product specifies it.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name protected equipment","Record threshold and reset type","Show contact terminal pair"],"distinction":"NC describes contact state independently of the thermal trip function.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HTS12, VTS12 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-pressure-temperature","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-temperature-switch-nc","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/temperature-switch-nc","illustration":"https://eloragrid.ai/library/illustrations/temperature-switch-nc.svg"},{"slug":"self-operating-thermal-switch","name":"Self-operating thermal switch","kind":"symbol","abbreviation":"TS SELF","aliases":["HTS12S59C","VTS12S59C"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A self-operating thermal switch responds directly to its thermal condition rather than through a separate powered relay input.","description":["A self-operating thermal switch responds directly to its thermal condition rather than through a separate powered relay input. Its contact and reset behaviour are device-specific."],"readingNotes":["Trace the thermal device separately from any PLC or auxiliary supply.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State thermal threshold","Identify reset characteristic","Reference mounted location"],"distinction":"A self-operating thermal switch is not the same as a powered temperature monitoring relay.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HTS12S59C, VTS12S59C (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-pressure-temperature","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-self-operating-thermal-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/self-operating-thermal-switch","illustration":"https://eloragrid.ai/library/illustrations/self-operating-thermal-switch.svg"},{"slug":"float-level-switch-no","name":"Float level switch NO","kind":"symbol","abbreviation":"LS FLOAT NO","aliases":["HFL11","VFL11"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A float-operated NO level switch changes contact state through a float mechanism at a documented fluid level.","description":["A float-operated NO level switch changes contact state through a float mechanism at a documented fluid level. Schematics need the rising or falling level action as well as the contact reference state."],"readingNotes":["Check how the float orientation changes the operate point or contact action.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name monitored vessel","State level and direction","Reference float arrangement"],"distinction":"A float switch is a discrete level device rather than a continuous level transmitter.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HFL11, VFL11 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-float-level-switch-no","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/float-level-switch-no","illustration":"https://eloragrid.ai/library/illustrations/float-level-switch-no.svg"},{"slug":"float-level-switch-nc","name":"Float level switch NC","kind":"symbol","abbreviation":"LS FLOAT NC","aliases":["HFL12","VFL12"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A float-operated NC level switch opens when its documented level condition actuates the mechanism.","description":["A float-operated NC level switch opens when its documented level condition actuates the mechanism. Reference state and level direction must be shown for alarm or pump-control interpretation."],"readingNotes":["Evaluate both low-level and high-level conditions from the switch schedule.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label vessel and location","Show actuation direction","Identify reset level"],"distinction":"NC does not necessarily mean low-level trip; the selected mechanism defines the process action.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HFL12, VFL12 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-float-level-switch-nc","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/float-level-switch-nc","illustration":"https://eloragrid.ai/library/illustrations/float-level-switch-nc.svg"},{"slug":"liquid-flow-switch","name":"Liquid flow switch","kind":"symbol","abbreviation":"FS LIQ","aliases":["HFS11","VFS11"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A liquid-flow switch issues a contact state when a documented flow condition actuates it.","description":["A liquid-flow switch issues a contact state when a documented flow condition actuates it. It is used in cooling or auxiliary systems where flow confirmation participates in permissives or alarms."],"readingNotes":["Identify whether the contact indicates sufficient flow or loss of flow.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name fluid circuit","State operate flow condition","Show contact destination"],"distinction":"A flow switch gives a discrete condition; a flow transmitter gives a measured signal.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HFS11, VFS11 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-liquid-flow-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/liquid-flow-switch","illustration":"https://eloragrid.ai/library/illustrations/liquid-flow-switch.svg"},{"slug":"gas-flow-switch","name":"Gas flow switch","kind":"symbol","abbreviation":"FS GAS","aliases":["HFS11S20","VFS11S20"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A gas-flow switch changes contact state for a specified gas-flow condition.","description":["A gas-flow switch changes contact state for a specified gas-flow condition. Its process connection and operating requirement belong in the equipment schedule as well as the control logic."],"readingNotes":["Do not substitute liquid-flow characteristics for the selected gas device.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify gas service","Record operating condition","Reference contact and reset action"],"distinction":"Gas-flow actuation is a process-specific input and is separate from the contact's electrical rating.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HFS11S20, VFS11S20 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-gas-flow-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/gas-flow-switch","illustration":"https://eloragrid.ai/library/illustrations/gas-flow-switch.svg"},{"slug":"inductive-proximity-switch","name":"Inductive proximity switch","kind":"symbol","abbreviation":"PROX IND","aliases":["HPX1I","VPX1I"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An inductive proximity switch detects a documented target without a mechanical contact actuator.","description":["An inductive proximity switch detects a documented target without a mechanical contact actuator. The schematic shows its supply and output arrangement, while target distance and material are specified elsewhere."],"readingNotes":["Distinguish a two-wire output path from a three-wire supply and signal arrangement.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State output type","Identify supply and common","Reference target and sensing distance"],"distinction":"An inductive proximity switch detects an electromagnetic target interaction, not capacitance or an optical beam.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPX1I, VPX1I (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-inductive-sensors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-inductive-proximity-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/inductive-proximity-switch","illustration":"https://eloragrid.ai/library/illustrations/inductive-proximity-switch.svg"},{"slug":"three-wire-inductive-proximity-switch","name":"Three-wire inductive proximity switch","kind":"symbol","abbreviation":"PROX IND 3W","aliases":["HPX11IN3","VPX11IN3"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A three-wire inductive proximity switch uses separate supply, common and output conductors.","description":["A three-wire inductive proximity switch uses separate supply, common and output conductors. Its output polarity and load connection must match the receiving input module."],"readingNotes":["Follow the output common and receiving input polarity together.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name three terminals","State PNP or NPN as specified","Reference PLC input compatibility"],"distinction":"Three-wire construction describes wiring; NO or NC describes the output's documented switching behaviour.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPX11IN3, VPX11IN3 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-inductive-sensors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-three-wire-inductive-proximity-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-wire-inductive-proximity-switch","illustration":"https://eloragrid.ai/library/illustrations/three-wire-inductive-proximity-switch.svg"},{"slug":"capacitive-proximity-switch","name":"Capacitive proximity switch","kind":"symbol","abbreviation":"PROX CAP","aliases":["HPX1C","VPX1C"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A capacitive proximity switch detects a target through a change in its sensing capacitance.","description":["A capacitive proximity switch detects a target through a change in its sensing capacitance. Its supply and switching output are shown separately from the target or process material."],"readingNotes":["Read sensitivity and target conditions from the product selection.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify supply terminals","State output function","Reference target material and sensitivity"],"distinction":"Capacitive sensing is different from inductive metal-target sensing.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPX1C, VPX1C (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-capacitive-sensors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-capacitive-proximity-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/capacitive-proximity-switch","illustration":"https://eloragrid.ai/library/illustrations/capacitive-proximity-switch.svg"},{"slug":"magnetic-proximity-switch","name":"Magnetic proximity switch","kind":"symbol","abbreviation":"PROX MAG","aliases":["HPX1M","VPX1M"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A magnetic proximity switch detects a documented magnetic target or field condition.","description":["A magnetic proximity switch detects a documented magnetic target or field condition. The drawing identifies supply and output where applicable, and the equipment detail identifies the magnet or actuator."],"readingNotes":["Locate the magnetic target as well as the switch body.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name target reference","State output/contact type","Identify sensing arrangement"],"distinction":"A magnetic proximity input is different from a relay coil operating its own contacts.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPX1M, VPX1M (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-magnetic-sensors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-magnetic-proximity-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/magnetic-proximity-switch","illustration":"https://eloragrid.ai/library/illustrations/magnetic-proximity-switch.svg"},{"slug":"photoelectric-emitter-receiver-switch","name":"Photoelectric emitter-receiver switch","kind":"symbol","abbreviation":"PHOTO","aliases":["HPE11B16","VPE11B16"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A photoelectric emitter-receiver device uses an optical path to determine a switching output.","description":["A photoelectric emitter-receiver device uses an optical path to determine a switching output. The schematic needs the supply and output connections, while the layout defines the optical arrangement."],"readingNotes":["Establish whether the indicated state corresponds to a received or interrupted beam.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show supply and output","Define light-on or dark-on function","Reference emitter/receiver arrangement"],"distinction":"Optical detection is not the same sensing principle as inductive or capacitive proximity.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPE11B16, VPE11B16 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-optical-sensors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-photoelectric-emitter-receiver-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/photoelectric-emitter-receiver-switch","illustration":"https://eloragrid.ai/library/illustrations/photoelectric-emitter-receiver-switch.svg"},{"slug":"thermocouple","name":"Thermocouple","kind":"symbol","abbreviation":"TC","aliases":["HTC1L","VTC1L"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A thermocouple produces a temperature-dependent voltage associated with its dissimilar-metal junction system.","description":["A thermocouple produces a temperature-dependent voltage associated with its dissimilar-metal junction system. Correct type, polarity and extension wiring matter when connecting it to an instrument."],"readingNotes":["Trace the thermocouple terminals and specified extension cable together.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State thermocouple type","Mark polarity","Reference input and compensation arrangement"],"distinction":"A thermocouple generates a voltage signal; an RTD changes resistance.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HTC1L, VTC1L (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-temperature-input","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-thermocouple","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/thermocouple","illustration":"https://eloragrid.ai/library/illustrations/thermocouple.svg"},{"slug":"resistance-temperature-detector","name":"Resistance temperature detector","kind":"symbol","abbreviation":"RTD","aliases":["Pt100 temperature sensor"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An RTD is a temperature sensor whose resistance changes with temperature.","description":["An RTD is a temperature sensor whose resistance changes with temperature. Its schematic needs the selected sensor characteristic and two-, three- or four-wire measurement connection."],"readingNotes":["Count sensor conductors at the measuring input instead of inferring them from the sensor name.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State sensor characteristic","Show conductor count","Reference compatible temperature input"],"distinction":"An RTD is different from a discrete temperature switch or a thermocouple voltage source.","facts":[{"label":"Drawing role","value":"Actuated indication"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-temperature-input","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","normally-open-contact"],"artwork":"edu-resistance-temperature-detector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/resistance-temperature-detector","illustration":"https://eloragrid.ai/library/illustrations/resistance-temperature-detector.svg"},{"slug":"voltmeter","name":"Voltmeter","kind":"symbol","abbreviation":"V","aliases":["HVM1","VVM1"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A voltmeter indicates electrical potential difference between its measurement inputs.","description":["A voltmeter indicates electrical potential difference between its measurement inputs. The drawing identifies the measured conductors and any instrument transformer or selector associated with those inputs."],"readingNotes":["Trace both voltage inputs rather than only the phase connection.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name measured voltage","State direct or VT connection","Reference measuring range"],"distinction":"A voltmeter indicates voltage; a voltage relay issues an output according to a voltage condition.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HVM1, VVM1 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-voltmeter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/voltmeter","illustration":"https://eloragrid.ai/library/illustrations/voltmeter.svg"},{"slug":"ammeter","name":"Ammeter","kind":"symbol","abbreviation":"A","aliases":["HAM1","VAM1"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An ammeter indicates current from a direct or instrument-transformed measurement circuit.","description":["An ammeter indicates current from a direct or instrument-transformed measurement circuit. Its schematic must identify the actual current path and any CT secondary circuit."],"readingNotes":["Distinguish the meter's current measurement terminals from its auxiliary supply.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State direct or CT measurement","Record operational ratio","Identify current circuit terminals"],"distinction":"An ammeter is an indication device, not an overcurrent protective function.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HAM1, VAM1 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-ammeter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/ammeter","illustration":"https://eloragrid.ai/library/illustrations/ammeter.svg"},{"slug":"power-factor-meter","name":"Power-factor meter","kind":"symbol","abbreviation":"PF","aliases":["HIN1PFM","VIN1PFM","cos phi meter"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A power-factor meter indicates the relationship between real and apparent power according to the instrument's measurement method.","description":["A power-factor meter indicates the relationship between real and apparent power according to the instrument's measurement method. Its voltage and current inputs need phase-consistent connections."],"readingNotes":["Identify the instrument's sign convention and whether it reports displacement or total power factor.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show current and voltage inputs","State measurement convention","Reference CT and VT ratios"],"distinction":"Power factor is a ratio; it is not reactive power in kvar.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HIN1PFM, VIN1PFM (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-power-factor-meter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/power-factor-meter","illustration":"https://eloragrid.ai/library/illustrations/power-factor-meter.svg"},{"slug":"phase-angle-meter","name":"Phase-angle meter","kind":"symbol","abbreviation":"PHASE","aliases":["HIN1PHM","VIN1PHM"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A phase-angle meter indicates the phase relationship between documented signals.","description":["A phase-angle meter indicates the phase relationship between documented signals. The schematic names the reference and compared input so the displayed angle is interpretable."],"readingNotes":["Check which signal is the reference and which is compared.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label compared inputs","State reference convention","Reference measurement range"],"distinction":"A phase-angle meter is not automatically a synchronism-check permissive relay.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HIN1PHM, VIN1PHM (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-phase-angle-meter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/phase-angle-meter","illustration":"https://eloragrid.ai/library/illustrations/phase-angle-meter.svg"},{"slug":"frequency-meter","name":"Frequency meter","kind":"symbol","abbreviation":"Hz","aliases":["HIN1FRM","VIN1FRM"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A frequency meter indicates the frequency of its measured input.","description":["A frequency meter indicates the frequency of its measured input. The source of that input must be clear when multiple buses or generators are present."],"readingNotes":["Trace the measurement to the correct bus or VT circuit.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name measured source","State input range","Reference auxiliary supply"],"distinction":"A frequency meter displays a quantity; an underfrequency relay applies an operating threshold.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HIN1FRM, VIN1FRM (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-frequency-meter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/frequency-meter","illustration":"https://eloragrid.ai/library/illustrations/frequency-meter.svg"},{"slug":"temperature-indicator","name":"Temperature indicator","kind":"symbol","abbreviation":"TEMP","aliases":["HIN1THM","VIN1THM"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A temperature indicator displays the temperature derived from its specified sensor or input.","description":["A temperature indicator displays the temperature derived from its specified sensor or input. The drawing links it to the sensor location and input characteristic."],"readingNotes":["Confirm whether the input is thermocouple, resistance or a transmitter signal.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify sensor tag","State sensor/input type","Reference displayed unit and range"],"distinction":"A temperature display does not imply a separate temperature-switch contact is provided.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HIN1THM, VIN1THM (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-temperature-indicator","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/temperature-indicator","illustration":"https://eloragrid.ai/library/illustrations/temperature-indicator.svg"},{"slug":"tachometer","name":"Tachometer","kind":"symbol","abbreviation":"RPM","aliases":["HIN1TAC","VIN1TAC"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A tachometer indicates rotational speed from its documented sensor or electrical input.","description":["A tachometer indicates rotational speed from its documented sensor or electrical input. Generator and motor auxiliary schematics need the relationship between the speed sensor and the indicated machine."],"readingNotes":["Identify pulses per revolution or sensor scaling in the instrument configuration.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Link machine and sensor","Reference input scaling","State displayed speed units"],"distinction":"A tachometer reports speed; a frequency meter reports electrical frequency.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HIN1TAC, VIN1TAC (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-tachometer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/tachometer","illustration":"https://eloragrid.ai/library/illustrations/tachometer.svg"},{"slug":"running-hours-meter","name":"Running-hours meter","kind":"symbol","abbreviation":"HOURS","aliases":["HIN1HRM","VIN1HRM","hour meter"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A running-hours meter accumulates elapsed time while its specified enabling condition is active.","description":["A running-hours meter accumulates elapsed time while its specified enabling condition is active. The schematic must show what condition is counted, such as a running feedback contact or an energised supply."],"readingNotes":["An energised meter supply and actual machine running are not always the same condition.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show enabling contact","Name counted condition","Reference reset/retention behaviour"],"distinction":"A running-hours meter measures duration; an operation counter counts events.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HIN1HRM, VIN1HRM (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-running-hours-meter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/running-hours-meter","illustration":"https://eloragrid.ai/library/illustrations/running-hours-meter.svg"},{"slug":"ampere-hour-meter","name":"Ampere-hour meter","kind":"symbol","abbreviation":"Ah","aliases":["HIN1AHM","VIN1AHM"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An ampere-hour meter integrates current over time for a documented measurement purpose.","description":["An ampere-hour meter integrates current over time for a documented measurement purpose. Battery circuits need direction, current-sensor scaling and any reset or retention conditions."],"readingNotes":["Do not infer battery state of charge directly from an unlabeled accumulated-current value.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify current sensor","State charge/discharge convention","Reference reset and scaling"],"distinction":"Ampere-hours and kilowatt-hours represent different measured quantities.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HIN1AHM, VIN1AHM (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-ampere-hour-meter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/ampere-hour-meter","illustration":"https://eloragrid.ai/library/illustrations/ampere-hour-meter.svg"},{"slug":"recording-wattmeter","name":"Recording wattmeter","kind":"symbol","abbreviation":"W REC","aliases":["HIN1P17","VIN1P17"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A recording wattmeter measures active power and records it according to the specified instrument.","description":["A recording wattmeter measures active power and records it according to the specified instrument. The schematic identifies voltage and current inputs while the logging settings belong in the instrument configuration."],"readingNotes":["Check input phase relationships and the recorded power sign convention.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show voltage and current inputs","Reference CT/VT ratios","Identify recording interval"],"distinction":"A wattmeter records power at a time or interval; an energy meter accumulates power over time.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HIN1P17, VIN1P17 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-recording-wattmeter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/recording-wattmeter","illustration":"https://eloragrid.ai/library/illustrations/recording-wattmeter.svg"},{"slug":"reactive-power-meter","name":"Reactive-power meter","kind":"symbol","abbreviation":"var","aliases":["HIN1P21","VIN1P21"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A reactive-power meter indicates reactive power using the instrument's documented voltage and current inputs.","description":["A reactive-power meter indicates reactive power using the instrument's documented voltage and current inputs. Import/export or leading/lagging conventions must be stated where operational decisions depend on them."],"readingNotes":["Read sign and quadrant conventions from the selected meter.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show input phases","State reactive-power sign convention","Reference transformer ratios"],"distinction":"Reactive power in var is different from reactive energy in varh.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HIN1P21, VIN1P21 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-reactive-power-meter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/reactive-power-meter","illustration":"https://eloragrid.ai/library/illustrations/reactive-power-meter.svg"},{"slug":"synchronoscope","name":"Synchronoscope","kind":"symbol","abbreviation":"SYNC SCOPE","aliases":["HIN1P11","VIN1P11"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A synchronoscope indicates the phase relationship and relative frequency behaviour of two AC sources.","description":["A synchronoscope indicates the phase relationship and relative frequency behaviour of two AC sources. Its input connections identify which source is incoming and which is the reference."],"readingNotes":["Trace both source inputs and their selected voltage phases.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name incoming and reference sources","Show measurement selection","Reference operating indication convention"],"distinction":"A synchronoscope provides indication; a synchronism-check relay provides a configured permissive output.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HIN1P11, VIN1P11 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-synchronoscope","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/synchronoscope","illustration":"https://eloragrid.ai/library/illustrations/synchronoscope.svg"},{"slug":"active-power-indicator","name":"Active-power indicator","kind":"symbol","abbreviation":"kW","aliases":["HIN1P19","VIN1P19"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An active-power indicator displays real power derived from its specified measurement inputs.","description":["An active-power indicator displays real power derived from its specified measurement inputs. On an SLD it identifies the monitored feeder or source; the schematic supplies phase and ratio details."],"readingNotes":["Identify the power-flow sign reference at the measurement location.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name measured feeder","Show current/voltage inputs","State import/export convention"],"distinction":"Active-power indication differs from reverse-power protection, even when both use the same measured quantity.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HIN1P19, VIN1P19 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-active-power-indicator","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/active-power-indicator","illustration":"https://eloragrid.ai/library/illustrations/active-power-indicator.svg"},{"slug":"differential-voltmeter","name":"Differential voltmeter","kind":"symbol","abbreviation":"DELTA V","aliases":["HVM1P7","VVM1P7"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A differential voltmeter indicates a difference between documented voltage inputs.","description":["A differential voltmeter indicates a difference between documented voltage inputs. Its reference and compared circuits must be identifiable so the indicated difference has a defined meaning."],"readingNotes":["Verify the input connection arrangement against the actual instrument diagram.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify both compared inputs","State polarity/reference","Reference measurement range"],"distinction":"A differential voltage indicator is different from a transformer differential protection function.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HVM1P7, VVM1P7 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-differential-voltmeter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/differential-voltmeter","illustration":"https://eloragrid.ai/library/illustrations/differential-voltmeter.svg"},{"slug":"active-energy-meter","name":"Active-energy meter","kind":"symbol","abbreviation":"kWh","aliases":["kilowatt hour meter"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An active-energy meter accumulates active power over time.","description":["An active-energy meter accumulates active power over time. The drawing identifies its voltage and current measurement point, while the register configuration defines import, export or net accumulation."],"readingNotes":["Separate direction of accumulated energy from the physical left-to-right drawing direction.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show metering point","State energy direction convention","Reference CT/VT ratios"],"distinction":"Kilowatt-hours measure accumulated energy; kilowatts measure active power.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-energy-meter","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer","active-power-indicator"],"artwork":"edu-active-energy-meter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/active-energy-meter","illustration":"https://eloragrid.ai/library/illustrations/active-energy-meter.svg"},{"slug":"reactive-energy-meter","name":"Reactive-energy meter","kind":"symbol","abbreviation":"kvarh","aliases":["var hour meter"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A reactive-energy meter accumulates reactive power over time according to the specified register convention.","description":["A reactive-energy meter accumulates reactive power over time according to the specified register convention. Its input connections and quadrant definitions are needed for correct interpretation."],"readingNotes":["Read delivered and received register definitions from the selected meter.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify metering point","State register/sign convention","Reference meter configuration"],"distinction":"Reactive energy in kvarh is different from reactive power in kvar.","facts":[{"label":"Drawing role","value":"Indicated quantity"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-energy-meter","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","voltage-transformer","active-power-indicator"],"artwork":"edu-reactive-energy-meter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/reactive-energy-meter","illustration":"https://eloragrid.ai/library/illustrations/reactive-energy-meter.svg"},{"slug":"maximum-current-monitoring-relay","name":"Maximum-current monitoring relay","kind":"symbol","abbreviation":"I HIGH","aliases":["HCR1F25","VCR1F25"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A maximum-current relay changes its output when the measured current meets a configured high-current condition.","description":["A maximum-current relay changes its output when the measured current meets a configured high-current condition. Its schematic separates measurement, auxiliary power and relay outputs."],"readingNotes":["Determine whether the input is direct current, a CT secondary or a conditioned signal.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify measured input","Reference threshold and delay","Show output destination"],"distinction":"A maximum-current monitoring element is not a complete feeder protection scheme by itself.","facts":[{"label":"Drawing role","value":"Monitoring element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1F25, VCR1F25 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-current-relays","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","relay-coil"],"artwork":"edu-maximum-current-monitoring-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/maximum-current-monitoring-relay","illustration":"https://eloragrid.ai/library/illustrations/maximum-current-monitoring-relay.svg"},{"slug":"minimum-current-monitoring-relay","name":"Minimum-current monitoring relay","kind":"symbol","abbreviation":"I LOW","aliases":["HCR1F26","VCR1F26"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A minimum-current relay operates according to a configured low-current condition.","description":["A minimum-current relay operates according to a configured low-current condition. Control drawings must identify whether it supervises an operating load, a permissive or another circuit."],"readingNotes":["Check how the relay handles zero current during intentional shutdown.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name supervised circuit","Reference enable condition","State threshold and delay"],"distinction":"Low current can be an intentional stopped state; the control logic defines when it is abnormal.","facts":[{"label":"Drawing role","value":"Monitoring element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1F26, VCR1F26 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-current-relays","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","relay-coil"],"artwork":"edu-minimum-current-monitoring-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/minimum-current-monitoring-relay","illustration":"https://eloragrid.ai/library/illustrations/minimum-current-monitoring-relay.svg"},{"slug":"current-window-monitoring-relay","name":"Current window monitoring relay","kind":"symbol","abbreviation":"I WINDOW","aliases":["HCR1F27","VCR1F27"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A current-window relay supervises both minimum and maximum current conditions.","description":["A current-window relay supervises both minimum and maximum current conditions. Its drawing links the measured circuit to separate or combined outputs according to the actual relay configuration."],"readingNotes":["Identify the permitted current band and any start-up inhibition.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State both thresholds","Reference timing/inhibit logic","Show output assignment"],"distinction":"A current window is a range-supervision function, not a measurement accuracy band.","facts":[{"label":"Drawing role","value":"Monitoring element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1F27, VCR1F27 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-current-relays","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","relay-coil"],"artwork":"edu-current-window-monitoring-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/current-window-monitoring-relay","illustration":"https://eloragrid.ai/library/illustrations/current-window-monitoring-relay.svg"},{"slug":"differential-current-measuring-relay","name":"Differential-current measuring relay","kind":"symbol","abbreviation":"I DIFF","aliases":["HCR1F29","VCR1F29"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A differential-current relay responds to the relationship between specified current inputs.","description":["A differential-current relay responds to the relationship between specified current inputs. The schematic must identify input directions, ratio matching and the protected or monitored zone."],"readingNotes":["Follow polarity and reference directions on all compared current circuits.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify compared inputs","Show polarity references","Link setting and zone documentation"],"distinction":"Differential measurement is not simply a single high-current threshold.","facts":[{"label":"Drawing role","value":"Monitoring element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1F29, VCR1F29 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-current-relays","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","relay-coil"],"artwork":"edu-differential-current-measuring-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/differential-current-measuring-relay","illustration":"https://eloragrid.ai/library/illustrations/differential-current-measuring-relay.svg"},{"slug":"residual-voltage-monitoring-relay","name":"Residual-voltage monitoring relay","kind":"symbol","abbreviation":"U RES","aliases":["HCR1F38","VCR1F38"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A residual-voltage relay responds to the specified residual-voltage measurement.","description":["A residual-voltage relay responds to the specified residual-voltage measurement. Its drawing needs the voltage-transformer connection and the input quantity definition."],"readingNotes":["Check the measurement circuit that produces the residual voltage.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show VT connection","State residual input scaling","Reference operating threshold"],"distinction":"Residual voltage is different from phase-to-neutral voltage at an arbitrary single phase.","facts":[{"label":"Drawing role","value":"Monitoring element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1F38, VCR1F38 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-voltage-relays","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","relay-coil"],"artwork":"edu-residual-voltage-monitoring-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/residual-voltage-monitoring-relay","illustration":"https://eloragrid.ai/library/illustrations/residual-voltage-monitoring-relay.svg"},{"slug":"loss-of-voltage-monitoring-relay","name":"Loss-of-voltage monitoring relay","kind":"symbol","abbreviation":"U LOSS","aliases":["HCR1F39","VCR1F39"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A loss-of-voltage relay changes its output for a documented absence-of-voltage condition.","description":["A loss-of-voltage relay changes its output for a documented absence-of-voltage condition. Schematics distinguish measurement failure, actual source loss and auxiliary-supply loss where the design requires them."],"readingNotes":["Trace the monitored voltage independently from relay auxiliary power.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify monitored source","State loss criterion","Show output and supply-loss behaviour"],"distinction":"Loss-of-voltage indication is not necessarily the same function as breaker undervoltage release.","facts":[{"label":"Drawing role","value":"Monitoring element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1F39, VCR1F39 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-voltage-relays","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","relay-coil"],"artwork":"edu-loss-of-voltage-monitoring-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/loss-of-voltage-monitoring-relay","illustration":"https://eloragrid.ai/library/illustrations/loss-of-voltage-monitoring-relay.svg"},{"slug":"phase-loss-monitoring-relay","name":"Phase-loss monitoring relay","kind":"symbol","abbreviation":"PH LOSS","aliases":["HCR1F42","VCR1F42"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A phase-loss relay supervises the presence of the specified phases in a three-phase system.","description":["A phase-loss relay supervises the presence of the specified phases in a three-phase system. The drawing identifies the monitored source and output used by control or protection logic."],"readingNotes":["Check whether phase sequence or voltage unbalance is also configured in the selected device.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show phase measurement inputs","State enabled functions","Reference output logic"],"distinction":"Phase loss is different from phase reversal or current unbalance.","facts":[{"label":"Drawing role","value":"Monitoring element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1F42, VCR1F42 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-monitoring-relays","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","relay-coil"],"artwork":"edu-phase-loss-monitoring-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/phase-loss-monitoring-relay","illustration":"https://eloragrid.ai/library/illustrations/phase-loss-monitoring-relay.svg"},{"slug":"frequency-monitoring-relay","name":"Frequency monitoring relay","kind":"symbol","abbreviation":"f MON","aliases":["HCR1F40","VCR1F40"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A frequency relay issues a documented output for a configured frequency condition.","description":["A frequency relay issues a documented output for a configured frequency condition. The schematic identifies its measurement input and links its thresholds to the settings record."],"readingNotes":["Determine whether high frequency, low frequency or both are monitored.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name measured bus","Reference thresholds and delay","Show output contacts"],"distinction":"A frequency relay applies operating criteria; a frequency meter only indicates the measured value.","facts":[{"label":"Drawing role","value":"Monitoring element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1F40, VCR1F40 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-monitoring-relays","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","relay-coil"],"artwork":"edu-frequency-monitoring-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/frequency-monitoring-relay","illustration":"https://eloragrid.ai/library/illustrations/frequency-monitoring-relay.svg"},{"slug":"minimum-active-power-relay","name":"Minimum active-power relay","kind":"symbol","abbreviation":"P LOW","aliases":["HCR1F43","VCR1F43"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A minimum active-power relay operates according to a configured low active-power condition.","description":["A minimum active-power relay operates according to a configured low active-power condition. The measurement direction and enable logic determine what low power means in the control sequence."],"readingNotes":["Identify the directional convention before evaluating the threshold.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show voltage/current inputs","State power direction","Reference threshold and enabling logic"],"distinction":"Minimum active power and reverse power are different operating criteria.","facts":[{"label":"Drawing role","value":"Monitoring element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCR1F43, VCR1F43 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-monitoring-relays","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["current-transformer","relay-coil"],"artwork":"edu-minimum-active-power-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/minimum-active-power-relay","illustration":"https://eloragrid.ai/library/illustrations/minimum-active-power-relay.svg"},{"slug":"feed-through-terminal-block","name":"Feed-through terminal block","kind":"symbol","abbreviation":"TB FEED","aliases":["feedthrough terminal"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A feed-through terminal provides an electrical connection between conductors assigned to the same terminal path.","description":["A feed-through terminal provides an electrical connection between conductors assigned to the same terminal path. The schematic identifies connectivity; the terminal plan adds physical position and conductor details."],"readingNotes":["Check whether wire numbering changes across the terminal under the project's convention.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State terminal identifier","Show both connected conductors","Reference terminal-strip position"],"distinction":"A feed-through path is different from an intentional disconnect point.","facts":[{"label":"Drawing role","value":"Wiring interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-terminal-families","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","terminal-strip"],"artwork":"edu-feed-through-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/feed-through-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/feed-through-terminal-block.svg"},{"slug":"disconnect-terminal-block","name":"Disconnect terminal block","kind":"symbol","abbreviation":"TB DISC","aliases":[],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A disconnect terminal includes a documented separable path for circuit isolation or testing at the wiring level.","description":["A disconnect terminal includes a documented separable path for circuit isolation or testing at the wiring level. Its reference operating state and terminal identity must be shown."],"readingNotes":["Identify the circuit path opened by the disconnect element.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label disconnect function","Show connected circuits","Reference normal/service position"],"distinction":"A disconnect terminal is not automatically suitable for load interruption or for every CT testing arrangement.","facts":[{"label":"Drawing role","value":"Wiring interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-terminal-families","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","terminal-strip"],"artwork":"edu-disconnect-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/disconnect-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/disconnect-terminal-block.svg"},{"slug":"knife-disconnect-terminal","name":"Knife-disconnect terminal","kind":"symbol","abbreviation":"TB KNIFE","aliases":[],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A knife-disconnect terminal opens its circuit path using a documented pivoting knife element.","description":["A knife-disconnect terminal opens its circuit path using a documented pivoting knife element. The schematic records the separable connection and the terminal plan identifies the selected physical terminal."],"readingNotes":["Follow the knife element rather than assuming every terminal level opens together.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show opened path","State normal knife position","Reference terminal model"],"distinction":"A visible knife disconnect differs mechanically from an isolating plug terminal.","facts":[{"label":"Drawing role","value":"Wiring interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-terminal-families","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","terminal-strip"],"artwork":"edu-knife-disconnect-terminal","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/knife-disconnect-terminal","illustration":"https://eloragrid.ai/library/illustrations/knife-disconnect-terminal.svg"},{"slug":"fuse-terminal-block","name":"Fuse terminal block","kind":"symbol","abbreviation":"TB FUSE","aliases":[],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A fuse terminal integrates a fuse-link into a terminal connection path.","description":["A fuse terminal integrates a fuse-link into a terminal connection path. The schematic needs the fuse function and rating, while the terminal schedule identifies the compatible holder and replaceable link."],"readingNotes":["Check which side of the terminal is the incoming supply.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify terminal and fuse tag","State fuse type and rating","Reference replacement link"],"distinction":"A fuse terminal is a protected wiring interface rather than a complete feeder switching assembly.","facts":[{"label":"Drawing role","value":"Wiring interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-terminal-families","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","terminal-strip"],"artwork":"edu-fuse-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/fuse-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/fuse-terminal-block.svg"},{"slug":"diode-terminal-block","name":"Diode terminal block","kind":"symbol","abbreviation":"TB DIODE","aliases":[],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A diode terminal includes a semiconductor diode in a documented terminal path.","description":["A diode terminal includes a semiconductor diode in a documented terminal path. Polarity and the intended protective or decoupling function must remain explicit in the wiring schematic."],"readingNotes":["Read anode and cathode connections from the actual terminal diagram.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Mark diode direction","Name terminal connections","Reference voltage/current rating"],"distinction":"A diode terminal is different from a feed-through terminal even if its physical housing is similar.","facts":[{"label":"Drawing role","value":"Wiring interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-terminal-families","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","terminal-strip"],"artwork":"edu-diode-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/diode-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/diode-terminal-block.svg"},{"slug":"component-terminal-block","name":"Component terminal block","kind":"symbol","abbreviation":"TB COMP","aliases":[],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A component terminal incorporates a documented electrical component or component plug in its wiring path.","description":["A component terminal incorporates a documented electrical component or component plug in its wiring path. Its drawing identifies the internal circuit rather than relying on the terminal's outline."],"readingNotes":["State the actual fitted component and terminal connection scheme.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify component value/type","Show internal connectivity","Reference selected terminal model"],"distinction":"Component terminal is a family description, not a single universally connected device.","facts":[{"label":"Drawing role","value":"Wiring interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-terminal-families","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","terminal-strip"],"artwork":"edu-component-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/component-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/component-terminal-block.svg"},{"slug":"multilevel-terminal-block","name":"Multilevel terminal block","kind":"symbol","abbreviation":"TB LEVEL","aliases":[],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A multilevel terminal carries two or more documented connection levels within one terminal body.","description":["A multilevel terminal carries two or more documented connection levels within one terminal body. Each level needs its electrical identity even when the physical device occupies one terminal-strip position."],"readingNotes":["Do not connect levels together unless the internal diagram or bridging plan explicitly does so.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label every level","Show internal connections","Reference physical terminal position"],"distinction":"Multiple levels do not necessarily share one electrical potential.","facts":[{"label":"Drawing role","value":"Wiring interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-terminal-families","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","terminal-strip"],"artwork":"edu-multilevel-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/multilevel-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/multilevel-terminal-block.svg"},{"slug":"multi-conductor-terminal-block","name":"Multi-conductor terminal block","kind":"symbol","abbreviation":"TB MULTI","aliases":[],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A multi-conductor terminal provides several connection points for its documented electrical path.","description":["A multi-conductor terminal provides several connection points for its documented electrical path. The schematic should show which conductors share potential and the terminal plan assigns the individual connection positions."],"readingNotes":["Check the terminal's internal commoning diagram.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify common path","Name each conductor","Reference connection capacity"],"distinction":"Multiple connection points and multiple isolated levels are different terminal constructions.","facts":[{"label":"Drawing role","value":"Wiring interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-terminal-families","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","terminal-strip"],"artwork":"edu-multi-conductor-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/multi-conductor-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/multi-conductor-terminal-block.svg"},{"slug":"protective-earth-terminal-block","name":"Protective-earth terminal block","kind":"symbol","abbreviation":"TB PE","aliases":[],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A PE terminal provides a documented protective-conductor connection, often including a specified connection to the mounting rail.","description":["A PE terminal provides a documented protective-conductor connection, often including a specified connection to the mounting rail. The circuit and terminal plan must show the bonding path actually relied upon."],"readingNotes":["Trace the protective path to the assembly's earth connection.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify PE terminal","Show rail/bonding connection","Reference terminal suitability"],"distinction":"A PE terminal is not a signal-common terminal.","facts":[{"label":"Drawing role","value":"Wiring interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-terminal-families","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","terminal-strip"],"artwork":"edu-protective-earth-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/protective-earth-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/protective-earth-terminal-block.svg"},{"slug":"sensor-terminal-block","name":"Sensor terminal block","kind":"symbol","abbreviation":"TB SENSOR","aliases":[],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A sensor terminal organises supply, return and signal connections for a documented sensor wiring arrangement.","description":["A sensor terminal organises supply, return and signal connections for a documented sensor wiring arrangement. Multilevel construction may separate the signal path from bridged supply potentials."],"readingNotes":["Follow each level to the sensor's supply and output terminals.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify signal level","Show supply bridges","Reference sensor conductor count"],"distinction":"A sensor terminal's physical levels do not imply that all conductors are electrically common.","facts":[{"label":"Drawing role","value":"Wiring interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-terminal-families","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-sensor-terminal","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","terminal-strip"],"artwork":"edu-sensor-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/sensor-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/sensor-terminal-block.svg"},{"slug":"actuator-terminal-block","name":"Actuator terminal block","kind":"symbol","abbreviation":"TB ACT","aliases":[],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An actuator terminal organises supply, output and any protective-conductor connections for a documented actuator circuit.","description":["An actuator terminal organises supply, output and any protective-conductor connections for a documented actuator circuit. Its internal and bridged paths must agree with the output-device wiring."],"readingNotes":["Trace the switched output separately from the common supply or PE level.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label output and common","Show protective connection if present","Reference terminal internal diagram"],"distinction":"An actuator terminal may look like a sensor terminal while serving a different connection arrangement.","facts":[{"label":"Drawing role","value":"Wiring interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-terminal-families","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-sensor-terminal","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","terminal-strip"],"artwork":"edu-actuator-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/actuator-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/actuator-terminal-block.svg"},{"slug":"plug-in-terminal-block","name":"Plug-in terminal block","kind":"symbol","abbreviation":"TB PLUG","aliases":[],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A plug-in terminal allows a documented terminal circuit to be disconnected through a removable mating part.","description":["A plug-in terminal allows a documented terminal circuit to be disconnected through a removable mating part. The schematic and terminal plan identify both fixed and removable sides where necessary."],"readingNotes":["Keep the mating connector identity with the terminal path.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name fixed and plug sides","State pole/pin identifiers","Reference normal connected state"],"distinction":"Plug-in construction describes a removable connection, not a fuse or isolation rating.","facts":[{"label":"Drawing role","value":"Wiring interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-terminal-families","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","terminal-strip"],"artwork":"edu-plug-in-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/plug-in-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/plug-in-terminal-block.svg"},{"slug":"high-current-terminal-block","name":"High-current terminal block","kind":"symbol","abbreviation":"TB POWER","aliases":[],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A high-current terminal provides a documented connection for large conductors and power circuits.","description":["A high-current terminal provides a documented connection for large conductors and power circuits. Its schematic identifies the power path while the schedule specifies connection capacity and ratings."],"readingNotes":["Read the permitted conductor arrangements from the selected terminal data.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State current/voltage rating","Reference conductor range","Identify terminal and lug arrangement"],"distinction":"High-current rating does not make the terminal a switching device.","facts":[{"label":"Drawing role","value":"Wiring interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-terminal-families","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","terminal-strip"],"artwork":"edu-high-current-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/high-current-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/high-current-terminal-block.svg"},{"slug":"terminal-jumper-bridge","name":"Terminal jumper bridge","kind":"symbol","abbreviation":"TB BRIDGE","aliases":[],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A terminal bridge intentionally connects specified terminal points to a common potential.","description":["A terminal bridge intentionally connects specified terminal points to a common potential. The drawing needs the actual bridged positions rather than an undifferentiated line across an entire terminal strip."],"readingNotes":["Check skipped positions and separated terminal levels in the bridge plan.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["List bridged terminals","Identify common potential","Reference bridge component"],"distinction":"A bridge is an intentional common connection; close physical spacing does not establish electrical continuity.","facts":[{"label":"Drawing role","value":"Wiring interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-terminal-families","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","terminal-strip"],"artwork":"edu-terminal-jumper-bridge","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/terminal-jumper-bridge","illustration":"https://eloragrid.ai/library/illustrations/terminal-jumper-bridge.svg"},{"slug":"plug-and-socket-connector-pair","name":"Plug and socket connector pair","kind":"symbol","abbreviation":"PLUG SOCKET","aliases":["HC01PJ","VC01PJ"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A plug/socket pair represents a detachable electrical connection with two mating sides.","description":["A plug/socket pair represents a detachable electrical connection with two mating sides. Pin identity and mating references are needed to follow each circuit through the connector."],"readingNotes":["Check connector naming and pin numbering on both mating halves.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name both connector halves","Identify pin numbers","Reference connected-state convention"],"distinction":"A connector pair is different from a permanent wire splice.","facts":[{"label":"Drawing role","value":"Detachable connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HC01PJ, VC01PJ (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-connectors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","plc-io"],"artwork":"edu-plug-and-socket-connector-pair","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/plug-and-socket-connector-pair","illustration":"https://eloragrid.ai/library/illustrations/plug-and-socket-connector-pair.svg"},{"slug":"connector-plug-half","name":"Connector plug half","kind":"symbol","abbreviation":"PLUG","aliases":["HC01P_","VC01P_"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A plug-half representation identifies one side of a detachable connector.","description":["A plug-half representation identifies one side of a detachable connector. Its mating reference and pin number preserve the circuit path when the other half appears elsewhere."],"readingNotes":["Locate the mating socket before treating the endpoint as an unconnected conductor.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify connector tag","State pin number","Cross-reference mating half"],"distinction":"A separately drawn plug is not a terminal block or an off-sheet wire arrow.","facts":[{"label":"Drawing role","value":"Detachable connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HC01P_, VC01P_ (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-connectors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","plc-io"],"artwork":"edu-connector-plug-half","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/connector-plug-half","illustration":"https://eloragrid.ai/library/illustrations/connector-plug-half.svg"},{"slug":"connector-socket-half","name":"Connector socket half","kind":"symbol","abbreviation":"SOCKET","aliases":["HC01_J","VC01_J"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A socket-half representation identifies the mating interface for a detachable plug.","description":["A socket-half representation identifies the mating interface for a detachable plug. The drawing records the pin and circuit identity, including the defined viewing orientation."],"readingNotes":["Read connector pin orientation from the documented front or wiring view.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name socket and pin","Reference mating plug","State pin-view convention"],"distinction":"Socket appearance on a schematic does not define the product's mechanical dimensions.","facts":[{"label":"Drawing role","value":"Detachable connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HC01_J, VC01_J (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-connectors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","plc-io"],"artwork":"edu-connector-socket-half","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/connector-socket-half","illustration":"https://eloragrid.ai/library/illustrations/connector-socket-half.svg"},{"slug":"wire-splice","name":"Wire splice","kind":"symbol","abbreviation":"SPLICE","aliases":["HSP1001","VSP1001"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A wire splice intentionally joins documented conductors without a detachable connector interface.","description":["A wire splice intentionally joins documented conductors without a detachable connector interface. The schematic shows electrical continuity and the harness or wiring record identifies the actual splice construction."],"readingNotes":["Distinguish the intended splice node from a crossing of unconnected wires.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name splice identifier","List joined conductors","Reference construction detail"],"distinction":"A splice is a permanent wiring junction, whereas a connector provides a detachable mating interface.","facts":[{"label":"Drawing role","value":"Detachable connection"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HSP1001, VSP1001 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-splices","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["terminal","plc-io"],"artwork":"edu-wire-splice","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/wire-splice","illustration":"https://eloragrid.ai/library/illustrations/wire-splice.svg"},{"slug":"earth-connection","name":"Earth connection","kind":"symbol","abbreviation":"EARTH","aliases":["HGND2","VGND2"],"category":"connections-wiring","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An earth connection identifies a documented circuit connection to earth.","description":["An earth connection identifies a documented circuit connection to earth. The drawing's label and context establish whether it serves system earthing, protection or another specified role."],"readingNotes":["Read the connection's purpose instead of treating every earth mark as interchangeable.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State connection purpose","Identify earth conductor","Reference earthing arrangement"],"distinction":"Earth, protective earth and functional earth have different documented roles.","facts":[{"label":"Drawing role","value":"Earth or bonding role"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HGND2, VGND2 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-earthing-surge","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["protective-earth","earthing-switch"],"artwork":"edu-earth-connection","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/earth-connection","illustration":"https://eloragrid.ai/library/illustrations/earth-connection.svg"},{"slug":"functional-earth","name":"Functional earth","kind":"symbol","abbreviation":"FE","aliases":["HGND3","VGND3"],"category":"connections-wiring","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"Functional earth serves an operational purpose such as a documented EMC or signal-reference connection.","description":["Functional earth serves an operational purpose such as a documented EMC or signal-reference connection. It must be distinguished from the protective-earthing path required for exposed conductive parts."],"readingNotes":["Trace any intended separation or connection between functional and protective earth.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label functional-earth conductor","State bonding relationship","Reference equipment instructions"],"distinction":"A functional-earth connection does not automatically fulfil protective-earthing requirements.","facts":[{"label":"Drawing role","value":"Earth or bonding role"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HGND3, VGND3 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-earthing-surge","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["protective-earth","earthing-switch"],"artwork":"edu-functional-earth","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/functional-earth","illustration":"https://eloragrid.ai/library/illustrations/functional-earth.svg"},{"slug":"protective-equipotential-bonding","name":"Protective equipotential bonding","kind":"symbol","abbreviation":"BOND PE","aliases":["HGND5","VGND5"],"category":"connections-wiring","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"Protective equipotential bonding connects documented conductive parts as part of the protective arrangement.","description":["Protective equipotential bonding connects documented conductive parts as part of the protective arrangement. The schematic and layout identify the actual bonding network and connection points."],"readingNotes":["Identify the conductive parts connected by the bond.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["List bonded parts","Show bond connection points","Reference conductor specification"],"distinction":"Bonding connects parts together; an earth electrode establishes a connection to earth.","facts":[{"label":"Drawing role","value":"Earth or bonding role"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HGND5, VGND5 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-earthing-surge","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["protective-earth","earthing-switch"],"artwork":"edu-protective-equipotential-bonding","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/protective-equipotential-bonding","illustration":"https://eloragrid.ai/library/illustrations/protective-equipotential-bonding.svg"},{"slug":"functional-equipotential-bonding","name":"Functional equipotential bonding","kind":"symbol","abbreviation":"BOND FE","aliases":["HGND1","VGND1"],"category":"connections-wiring","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"Functional equipotential bonding connects documented points for an operational or signal-related purpose.","description":["Functional equipotential bonding connects documented points for an operational or signal-related purpose. Its relationship to the protective bonding network must be explicit."],"readingNotes":["Check the permitted bonding arrangement in the equipment documentation.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify functional points","Show network connection","State relationship to PE"],"distinction":"Functional bonding and protective bonding describe different design purposes.","facts":[{"label":"Drawing role","value":"Earth or bonding role"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HGND1, VGND1 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-earthing-surge","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["protective-earth","earthing-switch"],"artwork":"edu-functional-equipotential-bonding","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/functional-equipotential-bonding","illustration":"https://eloragrid.ai/library/illustrations/functional-equipotential-bonding.svg"},{"slug":"surge-arrester","name":"Surge arrester","kind":"symbol","abbreviation":"SA","aliases":["HFU1_S00373","VFU1_S00373"],"category":"connections-wiring","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A surge arrester diverts a documented surge-related current through its protective path.","description":["A surge arrester diverts a documented surge-related current through its protective path. Its system connection, rating and earthing lead arrangement are essential drawing information."],"readingNotes":["Trace the protected conductor and discharge path independently.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify protected circuit","State arrester ratings/type","Reference earth connection and placement"],"distinction":"A surge arrester limits overvoltage transients; it does not replace overcurrent interruption.","facts":[{"label":"Drawing role","value":"Earth or bonding role"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HFU1_S00373, VFU1_S00373 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-earthing-surge","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["protective-earth","earthing-switch"],"artwork":"edu-surge-arrester","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/surge-arrester","illustration":"https://eloragrid.ai/library/illustrations/surge-arrester.svg"},{"slug":"gas-discharge-protection-tube","name":"Gas-discharge protection tube","kind":"symbol","abbreviation":"GDT","aliases":["HFU1_S00374","VFU1_S00374","gas discharge tube"],"category":"connections-wiring","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A gas-discharge tube provides a documented surge-protection path through gas breakdown.","description":["A gas-discharge tube provides a documented surge-protection path through gas breakdown. The schematic identifies its protected terminals and the intended discharge connection."],"readingNotes":["Check the tube arrangement and specified operating voltage from the selected component.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name protected terminals","State discharge-tube rating","Reference protective connection"],"distinction":"A gas-discharge tube is a protection component, not a fuse-link.","facts":[{"label":"Drawing role","value":"Earth or bonding role"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HFU1_S00374, VFU1_S00374 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-earthing-surge","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["protective-earth","earthing-switch"],"artwork":"edu-gas-discharge-protection-tube","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/gas-discharge-protection-tube","illustration":"https://eloragrid.ai/library/illustrations/gas-discharge-protection-tube.svg"},{"slug":"spark-gap-protective-element","name":"Spark-gap protective element","kind":"symbol","abbreviation":"SPARK GAP","aliases":["HFU1_S00371","VFU1_S00371"],"category":"connections-wiring","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A spark-gap element provides a documented breakdown path across separated electrodes.","description":["A spark-gap element provides a documented breakdown path across separated electrodes. Its drawing identifies the protective location without implying the same behaviour as a semiconductor clamp."],"readingNotes":["Read the gap and protection characteristics from the actual device documentation.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify connected points","Reference protection rating","Show discharge path"],"distinction":"A spark-gap element and a varistor use different protective mechanisms.","facts":[{"label":"Drawing role","value":"Earth or bonding role"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HFU1_S00371, VFU1_S00371 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-earthing-surge","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["protective-earth","earthing-switch"],"artwork":"edu-spark-gap-protective-element","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/spark-gap-protective-element","illustration":"https://eloragrid.ai/library/illustrations/spark-gap-protective-element.svg"},{"slug":"variable-resistor","name":"Variable resistor","kind":"symbol","abbreviation":"R VAR","aliases":["HVR1B","VVR1B"],"category":"control-circuits","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A variable resistor provides a documented adjustable resistance in a circuit path.","description":["A variable resistor provides a documented adjustable resistance in a circuit path. Its range, terminal usage and adjustment method must be stated when they affect the control function."],"readingNotes":["Check whether the device is used as a two-terminal resistance or a three-terminal divider.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State resistance range","Show connected terminals","Reference adjustment method"],"distinction":"A variable resistor is a broader function than a three-terminal potentiometer connection.","facts":[{"label":"Drawing role","value":"Passive circuit element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HVR1B, VVR1B (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-resistors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","capacitor"],"artwork":"edu-variable-resistor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/variable-resistor","illustration":"https://eloragrid.ai/library/illustrations/variable-resistor.svg"},{"slug":"potentiometer","name":"Potentiometer","kind":"symbol","abbreviation":"POT","aliases":["HVR1R4","VVR1R4"],"category":"control-circuits","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A potentiometer uses a movable contact on a resistive element to provide a documented adjustable divider or resistance.","description":["A potentiometer uses a movable contact on a resistive element to provide a documented adjustable divider or resistance. Its end terminals and wiper must be distinguishable."],"readingNotes":["Trace the wiper separately from the two fixed ends.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State resistance value","Identify wiper and ends","Reference intended adjustment range"],"distinction":"A potentiometer used as a divider has three circuit connections; a rheostat connection uses a variable resistive path.","facts":[{"label":"Drawing role","value":"Passive circuit element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HVR1R4, VVR1R4 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-resistors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","capacitor"],"artwork":"edu-potentiometer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/potentiometer","illustration":"https://eloragrid.ai/library/illustrations/potentiometer.svg"},{"slug":"light-dependent-resistor","name":"Light-dependent resistor","kind":"symbol","abbreviation":"LDR","aliases":["HRE1LDR","VRE1LDR"],"category":"control-circuits","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A light-dependent resistor changes resistance according to illumination.","description":["A light-dependent resistor changes resistance according to illumination. The schematic places the sensing element in its actual electrical network and the equipment detail identifies the illumination conditions."],"readingNotes":["A surrounding light-sensitive marker describes the component response, not a supply terminal.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State component characteristic","Identify measured circuit","Reference illumination arrangement"],"distinction":"An LDR changes resistance; a photodiode produces a different semiconductor sensing response.","facts":[{"label":"Drawing role","value":"Passive circuit element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HRE1LDR, VRE1LDR (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-resistors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","capacitor"],"artwork":"edu-light-dependent-resistor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/light-dependent-resistor","illustration":"https://eloragrid.ai/library/illustrations/light-dependent-resistor.svg"},{"slug":"heating-element","name":"Heating element","kind":"symbol","abbreviation":"HEATER","aliases":["HRE1HT","VRE1HT"],"category":"control-circuits","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A heating element converts electrical energy to heat in a documented circuit.","description":["A heating element converts electrical energy to heat in a documented circuit. Its supply, power rating and control/protection path need to be identified for cabinet or auxiliary-system use."],"readingNotes":["Trace the thermostat or control device separately from the element.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State voltage and power","Reference control thermostat","Show overcurrent protection"],"distinction":"A heater is a load; its thermostat is a separate switching or measurement function.","facts":[{"label":"Drawing role","value":"Passive circuit element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HRE1HT, VRE1HT (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-resistors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","capacitor"],"artwork":"edu-heating-element","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/heating-element","illustration":"https://eloragrid.ai/library/illustrations/heating-element.svg"},{"slug":"rc-network","name":"RC network","kind":"symbol","abbreviation":"RC","aliases":["HRE1RCN","VRE1RCN"],"category":"control-circuits","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An RC network combines resistance and capacitance in a specified circuit arrangement.","description":["An RC network combines resistance and capacitance in a specified circuit arrangement. Its function may be filtering or transient control, so the actual connection and values are needed."],"readingNotes":["Read the series or parallel topology rather than assuming one universal RC circuit.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show R/C connection","State component values","Reference intended function"],"distinction":"An RC network is not equivalent to a diode suppression network.","facts":[{"label":"Drawing role","value":"Passive circuit element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HRE1RCN, VRE1RCN (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-resistors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","capacitor"],"artwork":"edu-rc-network","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/rc-network","illustration":"https://eloragrid.ai/library/illustrations/rc-network.svg"},{"slug":"varistor","name":"Varistor","kind":"symbol","abbreviation":"VDR","aliases":["HVR1R3","VVR1R3"],"category":"control-circuits","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A varistor is a voltage-dependent resistive component used in a documented circuit, often for transient limiting.","description":["A varistor is a voltage-dependent resistive component used in a documented circuit, often for transient limiting. Its rating and protected connection are needed beyond the generic outline."],"readingNotes":["Check continuous-voltage rating separately from clamping-related data.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify protected terminals","State selected voltage rating","Reference energy and surge data"],"distinction":"A varistor is nonlinear; a fixed resistor does not provide the same voltage-dependent function.","facts":[{"label":"Drawing role","value":"Passive circuit element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HVR1R3, VVR1R3 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-resistors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","capacitor"],"artwork":"edu-varistor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/varistor","illustration":"https://eloragrid.ai/library/illustrations/varistor.svg"},{"slug":"current-measuring-shunt","name":"Current-measuring shunt","kind":"symbol","abbreviation":"SHUNT","aliases":["HVR1R7","VVR1R7","DC current shunt"],"category":"control-circuits","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A current-measuring shunt produces a documented voltage drop corresponding to current through a resistive element.","description":["A current-measuring shunt produces a documented voltage drop corresponding to current through a resistive element. The drawing must distinguish the current path from the sensing leads."],"readingNotes":["Identify the separate measurement connections where the selected shunt provides them.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State current and voltage-drop rating","Show sense leads","Reference polarity/scaling"],"distinction":"A shunt produces a voltage measurement without a current-transformer secondary.","facts":[{"label":"Drawing role","value":"Passive circuit element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HVR1R7, VVR1R7 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-resistors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","capacitor"],"artwork":"edu-current-measuring-shunt","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/current-measuring-shunt","illustration":"https://eloragrid.ai/library/illustrations/current-measuring-shunt.svg"},{"slug":"electrolytic-capacitor","name":"Electrolytic capacitor","kind":"symbol","abbreviation":"C ELEC","aliases":["HCA1EL","VCA1EL"],"category":"control-circuits","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An electrolytic capacitor has a specified capacitance, voltage rating and any documented polarity requirement.","description":["An electrolytic capacitor has a specified capacitance, voltage rating and any documented polarity requirement. The drawing must preserve polarity where the chosen component is polarised."],"readingNotes":["Check the actual component type before applying a polarity annotation.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State capacitance and voltage","Mark polarity if applicable","Reference operating conditions"],"distinction":"Electrolytic construction does not describe every capacitor as interchangeable or necessarily nonpolarised.","facts":[{"label":"Drawing role","value":"Passive circuit element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCA1EL, VCA1EL (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-capacitors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","capacitor"],"artwork":"edu-electrolytic-capacitor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/electrolytic-capacitor","illustration":"https://eloragrid.ai/library/illustrations/electrolytic-capacitor.svg"},{"slug":"feedthrough-capacitor","name":"Feedthrough capacitor","kind":"symbol","abbreviation":"C FEED","aliases":["HCA1C2","VCA1C2"],"category":"control-circuits","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A feedthrough capacitor is arranged with a conductor path and a documented capacitive connection used in filtering.","description":["A feedthrough capacitor is arranged with a conductor path and a documented capacitive connection used in filtering. The schematic must identify both the through path and the return connection."],"readingNotes":["Trace the filtered conductor separately from the capacitive return.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show through conductor","Identify return or case connection","Reference component rating"],"distinction":"A feedthrough capacitor is a filter connection arrangement, not a removable wiring terminal.","facts":[{"label":"Drawing role","value":"Passive circuit element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCA1C2, VCA1C2 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-capacitors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","capacitor"],"artwork":"edu-feedthrough-capacitor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/feedthrough-capacitor","illustration":"https://eloragrid.ai/library/illustrations/feedthrough-capacitor.svg"},{"slug":"adjustable-capacitor","name":"Adjustable capacitor","kind":"symbol","abbreviation":"C ADJ","aliases":[],"category":"control-circuits","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An adjustable capacitor provides a documented variable capacitance.","description":["An adjustable capacitor provides a documented variable capacitance. Its control or preset adjustment is specified separately from the two main circuit terminals."],"readingNotes":["Identify whether adjustment is operational or a commissioning preset.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State capacitance range","Show circuit terminals","Reference adjustment method"],"distinction":"Adjustable capacitance changes a capacitive parameter; it is not an adjustable resistor.","facts":[{"label":"Drawing role","value":"Passive circuit element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-capacitors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","capacitor"],"artwork":"edu-adjustable-capacitor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/adjustable-capacitor","illustration":"https://eloragrid.ai/library/illustrations/adjustable-capacitor.svg"},{"slug":"three-phase-power-factor-capacitor","name":"Three-phase power-factor capacitor","kind":"symbol","abbreviation":"CAP 3PH","aliases":["HCA113","VCA113"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A three-phase capacitor assembly provides a documented reactive-power function connected to the power circuit.","description":["A three-phase capacitor assembly provides a documented reactive-power function connected to the power circuit. The schematic needs its connection, switching and protective devices as separate elements."],"readingNotes":["State rated kvar at the specified system voltage and frequency.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Record kvar and voltage","Show connection and switching","Reference discharge/protection arrangement"],"distinction":"A power-factor capacitor is a power-circuit assembly, not a generic small-signal filter capacitor.","facts":[{"label":"Drawing role","value":"Passive circuit element"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCA113, VCA113 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-motor-control","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","capacitor"],"artwork":"edu-three-phase-power-factor-capacitor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-phase-power-factor-capacitor","illustration":"https://eloragrid.ai/library/illustrations/three-phase-power-factor-capacitor.svg"},{"slug":"reactor","name":"Reactor","kind":"symbol","abbreviation":"L","aliases":["HRT1","VRT1"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A reactor is an inductive component used for a documented power-circuit purpose.","description":["A reactor is an inductive component used for a documented power-circuit purpose. Its connection and rated electrical characteristics need to be stated because an inductor outline alone does not identify its duty."],"readingNotes":["Identify whether it is connected in series or shunt.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State circuit purpose","Record inductance or impedance","Reference current and voltage rating"],"distinction":"A reactor stores magnetic energy; a transformer couples separate documented winding circuits.","facts":[{"label":"Drawing role","value":"Inductive component"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HRT1, VRT1 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-reactors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","capacitor"],"artwork":"edu-reactor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/reactor","illustration":"https://eloragrid.ai/library/illustrations/reactor.svg"},{"slug":"iron-core-reactor","name":"Iron-core reactor","kind":"symbol","abbreviation":"L IRON","aliases":["HRT1IC","VRT1IC"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An iron-core reactor uses a documented magnetic core to provide its inductive characteristic.","description":["An iron-core reactor uses a documented magnetic core to provide its inductive characteristic. Its core and saturation behaviour belong to the selected equipment data."],"readingNotes":["Do not infer linear behaviour at every current level from an iron-core marker.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify circuit connection","State rated current/inductance","Reference core operating limits"],"distinction":"Iron-core construction is different from an air-core reactor.","facts":[{"label":"Drawing role","value":"Inductive component"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HRT1IC, VRT1IC (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-reactors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","capacitor"],"artwork":"edu-iron-core-reactor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/iron-core-reactor","illustration":"https://eloragrid.ai/library/illustrations/iron-core-reactor.svg"},{"slug":"gapped-core-inductor","name":"Gapped-core inductor","kind":"symbol","abbreviation":"L GAP","aliases":["HRT1L3","VRT1L3"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A gapped-core inductor includes a documented air gap in its magnetic circuit.","description":["A gapped-core inductor includes a documented air gap in its magnetic circuit. The drawing identifies that construction while the component data establishes inductance and operating limits."],"readingNotes":["A core gap marker describes the magnetic circuit, not an electrical disconnect.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State inductance","Reference current rating","Identify gap/core construction"],"distinction":"A magnetic air gap is different from an open power-circuit connection.","facts":[{"label":"Drawing role","value":"Inductive component"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HRT1L3, VRT1L3 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-reactors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","capacitor"],"artwork":"edu-gapped-core-inductor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/gapped-core-inductor","illustration":"https://eloragrid.ai/library/illustrations/gapped-core-inductor.svg"},{"slug":"adjustable-core-inductor","name":"Adjustable-core inductor","kind":"symbol","abbreviation":"L ADJ","aliases":["HRT1L4","VRT1L4"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An adjustable-core inductor varies its documented inductive characteristic through a magnetic adjustment.","description":["An adjustable-core inductor varies its documented inductive characteristic through a magnetic adjustment. Its permissible range and adjustment method require equipment information."],"readingNotes":["Separate the adjustment mechanism from the electrical winding terminals.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State adjustment range","Show winding connections","Reference adjustment instructions"],"distinction":"Adjustable inductance is not an on/off switching function.","facts":[{"label":"Drawing role","value":"Inductive component"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HRT1L4, VRT1L4 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-reactors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-transformer","capacitor"],"artwork":"edu-adjustable-core-inductor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/adjustable-core-inductor","illustration":"https://eloragrid.ai/library/illustrations/adjustable-core-inductor.svg"},{"slug":"diode","name":"Diode","kind":"symbol","abbreviation":"D","aliases":["HDI1","VDI1"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A diode provides a semiconductor path with documented directional conduction characteristics.","description":["A diode provides a semiconductor path with documented directional conduction characteristics. The schematic must identify anode, cathode and the intended circuit function."],"readingNotes":["Use terminal polarity rather than page orientation to identify the forward direction.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Mark anode/cathode","State selected ratings","Reference circuit purpose"],"distinction":"A diode's reverse behaviour depends on its type and rating; it is not an ideal mechanical open contact.","facts":[{"label":"Drawing role","value":"Semiconductor function"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDI1, VDI1 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-semiconductors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","power-converter"],"artwork":"edu-diode","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/diode","illustration":"https://eloragrid.ai/library/illustrations/diode.svg"},{"slug":"photodiode","name":"Photodiode","kind":"symbol","abbreviation":"PD","aliases":["HDI1B4","VDI1B4"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A photodiode is a light-sensitive semiconductor device used in a documented sensing circuit.","description":["A photodiode is a light-sensitive semiconductor device used in a documented sensing circuit. Its electrical connections and optical input are separate aspects of the representation."],"readingNotes":["Identify whether the associated circuit biases the diode or measures its generated response.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show polarity and bias circuit","Reference optical input","State selected device type"],"distinction":"A photodiode senses light; an LED emits light.","facts":[{"label":"Drawing role","value":"Semiconductor function"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDI1B4, VDI1B4 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-semiconductors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","power-converter"],"artwork":"edu-photodiode","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/photodiode","illustration":"https://eloragrid.ai/library/illustrations/photodiode.svg"},{"slug":"zener-diode","name":"Zener diode","kind":"symbol","abbreviation":"ZD","aliases":["HDI1V2","VDI1V2"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A Zener diode is a semiconductor component intended for a documented reverse-breakdown operating function.","description":["A Zener diode is a semiconductor component intended for a documented reverse-breakdown operating function. The schematic identifies its polarity and the associated current-limiting or bias circuit."],"readingNotes":["Check the reference voltage and power rating of the selected component.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State rated breakdown voltage","Show polarity","Reference current-limiting network"],"distinction":"A Zener diode's specified breakdown function differs from an ordinary rectifier diode's intended service.","facts":[{"label":"Drawing role","value":"Semiconductor function"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDI1V2, VDI1V2 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-semiconductors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","power-converter"],"artwork":"edu-zener-diode","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/zener-diode","illustration":"https://eloragrid.ai/library/illustrations/zener-diode.svg"},{"slug":"diac","name":"DIAC","kind":"symbol","abbreviation":"DIAC","aliases":["HDI1V3","VDI1V3"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A DIAC is a bidirectional triggering semiconductor device used in a documented control circuit.","description":["A DIAC is a bidirectional triggering semiconductor device used in a documented control circuit. Its terminals and breakover characteristics are defined by the selected component."],"readingNotes":["Follow the trigger circuit rather than treating the device as a controlled switch with a separate gate.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify connected terminals","Reference breakover rating","Show associated trigger network"],"distinction":"A DIAC does not have the same controlled gate terminal as a TRIAC.","facts":[{"label":"Drawing role","value":"Semiconductor function"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDI1V3, VDI1V3 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-semiconductors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","power-converter"],"artwork":"edu-diac","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/diac","illustration":"https://eloragrid.ai/library/illustrations/diac.svg"},{"slug":"single-phase-bridge-rectifier","name":"Single-phase bridge rectifier","kind":"symbol","abbreviation":"BR 1PH","aliases":["HDI1BR","VDI1BR"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A single-phase bridge rectifier converts its specified AC input to a DC output through a bridge arrangement.","description":["A single-phase bridge rectifier converts its specified AC input to a DC output through a bridge arrangement. The schematic must distinguish both AC terminals from the positive and negative output terminals."],"readingNotes":["Preserve DC polarity when moving or rotating the functional block.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify AC inputs","Mark positive/negative outputs","Reference current and voltage ratings"],"distinction":"A bridge rectifier is an AC-to-DC stage, not a complete regulated DC power supply.","facts":[{"label":"Drawing role","value":"Semiconductor function"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDI1BR, VDI1BR (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-semiconductors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["diode","ac-to-dc-power-supply","power-converter"],"artwork":"edu-single-phase-bridge-rectifier","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/single-phase-bridge-rectifier","illustration":"https://eloragrid.ai/library/illustrations/single-phase-bridge-rectifier.svg"},{"slug":"three-phase-bridge-rectifier","name":"Three-phase bridge rectifier","kind":"symbol","abbreviation":"BR 3PH","aliases":["HDI1V5","VDI1V5"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A three-phase bridge rectifier converts a documented three-phase AC input into a DC output.","description":["A three-phase bridge rectifier converts a documented three-phase AC input into a DC output. Its input phase terminals and DC polarity must be identifiable."],"readingNotes":["Check the rectifier's output and any smoothing network as separate circuit elements.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label three AC phases","Mark DC polarity","Reference rectifier ratings"],"distinction":"Three-phase rectification differs from a single-phase bridge connection.","facts":[{"label":"Drawing role","value":"Semiconductor function"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDI1V5, VDI1V5 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-semiconductors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["diode","ac-to-dc-power-supply","power-converter"],"artwork":"edu-three-phase-bridge-rectifier","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-phase-bridge-rectifier","illustration":"https://eloragrid.ai/library/illustrations/three-phase-bridge-rectifier.svg"},{"slug":"silicon-controlled-rectifier","name":"Silicon-controlled rectifier","kind":"symbol","abbreviation":"SCR","aliases":["HDI1V4","VDI1V4","thyristor"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An SCR is a thyristor with a gate-controlled triggering function in its documented circuit.","description":["An SCR is a thyristor with a gate-controlled triggering function in its documented circuit. Anode, cathode and gate connections must be distinguished to understand the control path."],"readingNotes":["Read turn-on and current-interruption behaviour from the chosen circuit and component.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label gate/anode/cathode","Reference gate drive","State voltage/current ratings"],"distinction":"An SCR is not the same as a bidirectional TRIAC.","facts":[{"label":"Drawing role","value":"Semiconductor function"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDI1V4, VDI1V4 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-semiconductors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","power-converter"],"artwork":"edu-silicon-controlled-rectifier","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/silicon-controlled-rectifier","illustration":"https://eloragrid.ai/library/illustrations/silicon-controlled-rectifier.svg"},{"slug":"gate-turn-off-thyristor","name":"Gate-turn-off thyristor","kind":"symbol","abbreviation":"GTO","aliases":["HDI1_S00655","VDI1_S00655","gate turn off thyristor"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A gate-turn-off thyristor has a documented gate-controlled turn-off capability.","description":["A gate-turn-off thyristor has a documented gate-controlled turn-off capability. Its drive requirements and power-terminal connections are part of the selected converter design."],"readingNotes":["Do not substitute a simple SCR gate circuit for the documented turn-off drive.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify power terminals","Reference gate-drive circuit","State selected device rating"],"distinction":"Gate-turn-off capability distinguishes this device from a conventional latching SCR.","facts":[{"label":"Drawing role","value":"Semiconductor function"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDI1_S00655, VDI1_S00655 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-semiconductors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","power-converter"],"artwork":"edu-gate-turn-off-thyristor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/gate-turn-off-thyristor","illustration":"https://eloragrid.ai/library/illustrations/gate-turn-off-thyristor.svg"},{"slug":"triac","name":"TRIAC","kind":"symbol","abbreviation":"TRIAC","aliases":["HDI1_S00659","VDI1_S00659"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A TRIAC is a bidirectional thyristor used for a documented AC switching or control function.","description":["A TRIAC is a bidirectional thyristor used for a documented AC switching or control function. Its main terminals and gate connections must match the selected component."],"readingNotes":["Identify the gate reference main terminal from the component data.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Label main terminals and gate","Reference gate trigger circuit","State AC load conditions"],"distinction":"A TRIAC is a controlled bidirectional device, unlike a DIAC trigger element.","facts":[{"label":"Drawing role","value":"Semiconductor function"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDI1_S00659, VDI1_S00659 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-semiconductors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","power-converter"],"artwork":"edu-triac","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/triac","illustration":"https://eloragrid.ai/library/illustrations/triac.svg"},{"slug":"bidirectional-breakdown-diode","name":"Bidirectional breakdown diode","kind":"symbol","abbreviation":"TVS BI","aliases":["HDI1_S00647","VDI1_S00647"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A bidirectional breakdown diode provides a documented voltage-limiting semiconductor path in both polarities.","description":["A bidirectional breakdown diode provides a documented voltage-limiting semiconductor path in both polarities. Its working voltage and surge characteristics determine the protective application."],"readingNotes":["Read working-voltage and breakdown specifications separately.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify protected nodes","State working-voltage rating","Reference surge capability"],"distinction":"Bidirectional protection does not make the component a controllable power switch.","facts":[{"label":"Drawing role","value":"Semiconductor function"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDI1_S00647, VDI1_S00647 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-semiconductors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["resistor","power-converter"],"artwork":"edu-bidirectional-breakdown-diode","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/bidirectional-breakdown-diode","illustration":"https://eloragrid.ai/library/illustrations/bidirectional-breakdown-diode.svg"},{"slug":"single-phase-ac-motor","name":"Single-phase AC motor","kind":"symbol","abbreviation":"M 1PH AC","aliases":["HMO1M9","VMO1M9"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A single-phase AC motor represents a load supplied from a documented single-phase source.","description":["A single-phase AC motor represents a load supplied from a documented single-phase source. Its actual winding, starting component and terminal arrangement require the selected motor connection diagram."],"readingNotes":["A simplified motor image does not show every start or run winding.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State supply voltage","Reference motor terminal diagram","Show starting/protection arrangement"],"distinction":"Single-phase supply and the motor's starting method are different drawing attributes.","facts":[{"label":"Drawing role","value":"Rotating or linear load"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HMO1M9, VMO1M9 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-single-phase-motors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["motor","contactor"],"artwork":"edu-single-phase-ac-motor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/single-phase-ac-motor","illustration":"https://eloragrid.ai/library/illustrations/single-phase-ac-motor.svg"},{"slug":"single-phase-motor-with-fan","name":"Single-phase motor with fan","kind":"symbol","abbreviation":"M 1PH FAN","aliases":["HMO1M3M","VMO1M3M"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A single-phase motor with an associated fan identifies the driven function as well as the electrical load.","description":["A single-phase motor with an associated fan identifies the driven function as well as the electrical load. Its schematic supply is separate from the airflow or installation detail."],"readingNotes":["Link the motor tag to the cabinet or auxiliary fan shown on the layout.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name fan/motor tag","State electrical rating","Reference airflow and installation data"],"distinction":"A fan annotation identifies driven equipment, not a new electrical phase system.","facts":[{"label":"Drawing role","value":"Rotating or linear load"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HMO1M3M, VMO1M3M (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-single-phase-motors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["motor","contactor"],"artwork":"edu-single-phase-motor-with-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/single-phase-motor-with-fan","illustration":"https://eloragrid.ai/library/illustrations/single-phase-motor-with-fan.svg"},{"slug":"three-phase-ac-motor","name":"Three-phase AC motor","kind":"symbol","abbreviation":"M 3PH","aliases":["HMO13","VMO13"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A three-phase AC motor is a load supplied from three documented phases.","description":["A three-phase AC motor is a load supplied from three documented phases. Its winding connections, protection and starter are recorded in the power schematic or linked motor data."],"readingNotes":["Check whether the drawing shows a simplified load or an expanded terminal connection.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State supply and rating","Reference winding connection","Show starter and overload protection"],"distinction":"A three-phase motor representation does not specify star or delta terminal links by itself.","facts":[{"label":"Drawing role","value":"Rotating or linear load"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HMO13, VMO13 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-motors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["motor","contactor"],"artwork":"edu-three-phase-ac-motor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-phase-ac-motor","illustration":"https://eloragrid.ai/library/illustrations/three-phase-ac-motor.svg"},{"slug":"three-phase-motor-with-fan","name":"Three-phase motor with fan","kind":"symbol","abbreviation":"M 3PH FAN","aliases":["HMO1M2","VMO1M2"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A three-phase motor with fan identifies an electrically driven ventilation or cooling load.","description":["A three-phase motor with fan identifies an electrically driven ventilation or cooling load. The motor supply and the mechanical airflow arrangement are documented through linked tags."],"readingNotes":["Identify whether the fan is an independent auxiliary load or associated with another machine.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Match motor/fan tag","State supply and power","Reference control and airflow requirements"],"distinction":"The fan symbol describes driven equipment while the motor symbol describes its electrical load.","facts":[{"label":"Drawing role","value":"Rotating or linear load"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HMO1M2, VMO1M2 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-motors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["motor","contactor"],"artwork":"edu-three-phase-motor-with-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-phase-motor-with-fan","illustration":"https://eloragrid.ai/library/illustrations/three-phase-motor-with-fan.svg"},{"slug":"wound-rotor-induction-motor","name":"Wound-rotor induction motor","kind":"symbol","abbreviation":"M WR","aliases":["HMO1M4","VMO1M4"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A wound-rotor induction motor includes a rotor winding arrangement with documented external connections.","description":["A wound-rotor induction motor includes a rotor winding arrangement with documented external connections. The schematic must identify the rotor circuit and any connected starting or control equipment."],"readingNotes":["Trace stator and rotor circuits as separate winding systems.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show stator connections","Identify rotor terminals","Reference rotor starter/control circuit"],"distinction":"A wound-rotor motor has an accessible rotor circuit unlike an ordinary cage-rotor representation.","facts":[{"label":"Drawing role","value":"Rotating or linear load"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HMO1M4, VMO1M4 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-motors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["motor","contactor"],"artwork":"edu-wound-rotor-induction-motor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/wound-rotor-induction-motor","illustration":"https://eloragrid.ai/library/illustrations/wound-rotor-induction-motor.svg"},{"slug":"three-phase-synchronous-motor","name":"Three-phase synchronous motor","kind":"symbol","abbreviation":"M 3PH SYNC","aliases":["HMO1M17","VMO1M17"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A synchronous motor operates with a documented synchronous relationship to the electrical supply.","description":["A synchronous motor operates with a documented synchronous relationship to the electrical supply. Its excitation arrangement and starting/control system require device-specific information."],"readingNotes":["Identify any field or excitation supply separately from the main stator circuit.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State motor rating","Show excitation reference","Link starting and protection circuits"],"distinction":"Synchronous operation is different from an induction motor's operating principle.","facts":[{"label":"Drawing role","value":"Rotating or linear load"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HMO1M17, VMO1M17 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-motors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["motor","contactor"],"artwork":"edu-three-phase-synchronous-motor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-phase-synchronous-motor","illustration":"https://eloragrid.ai/library/illustrations/three-phase-synchronous-motor.svg"},{"slug":"dc-motor","name":"DC motor","kind":"symbol","abbreviation":"M DC","aliases":["HMO1M6","VMO1M6"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A DC motor represents a documented DC electrical load whose armature and any field winding arrangements need to be identified.","description":["A DC motor represents a documented DC electrical load whose armature and any field winding arrangements need to be identified. The generic function does not select the excitation method."],"readingNotes":["Trace armature polarity and the control or starting circuit.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State DC voltage and rating","Identify armature terminals","Reference excitation arrangement"],"distinction":"A generic DC motor does not imply permanent-magnet or series-field construction.","facts":[{"label":"Drawing role","value":"Rotating or linear load"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HMO1M6, VMO1M6 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-dc-motors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["motor","contactor"],"artwork":"edu-dc-motor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/dc-motor","illustration":"https://eloragrid.ai/library/illustrations/dc-motor.svg"},{"slug":"permanent-magnet-dc-motor","name":"Permanent-magnet DC motor","kind":"symbol","abbreviation":"M DC PM","aliases":["HMO1M13","VMO1M13"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A permanent-magnet DC motor uses a permanent magnetic field rather than a separately connected field winding.","description":["A permanent-magnet DC motor uses a permanent magnetic field rather than a separately connected field winding. Its armature and control connections still require product documentation."],"readingNotes":["Do not draw a separate excitation supply unless the actual motor has one.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify armature polarity","State motor rating","Reference speed/control circuit"],"distinction":"Permanent-magnet construction differs from a separately excited DC field winding.","facts":[{"label":"Drawing role","value":"Rotating or linear load"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HMO1M13, VMO1M13 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-dc-motors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["motor","contactor"],"artwork":"edu-permanent-magnet-dc-motor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/permanent-magnet-dc-motor","illustration":"https://eloragrid.ai/library/illustrations/permanent-magnet-dc-motor.svg"},{"slug":"series-excited-dc-motor","name":"Series-excited DC motor","kind":"symbol","abbreviation":"M DC SERIES","aliases":["HMO1M7","VMO1M7"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A series-excited DC motor connects its documented field winding in series with the armature circuit.","description":["A series-excited DC motor connects its documented field winding in series with the armature circuit. Both winding and armature terminals need to remain identifiable in expanded schematics."],"readingNotes":["Follow the field current through the armature path.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show series field connection","Identify armature terminals","Reference starting/control arrangement"],"distinction":"A series field and a shunt field have different circuit connections.","facts":[{"label":"Drawing role","value":"Rotating or linear load"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HMO1M7, VMO1M7 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-dc-motors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["motor","contactor"],"artwork":"edu-series-excited-dc-motor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/series-excited-dc-motor","illustration":"https://eloragrid.ai/library/illustrations/series-excited-dc-motor.svg"},{"slug":"separately-excited-dc-motor","name":"Separately excited DC motor","kind":"symbol","abbreviation":"M DC SEP","aliases":["HMO1M12","VMO1M12"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A separately excited DC motor has a documented field circuit supplied separately from the armature circuit.","description":["A separately excited DC motor has a documented field circuit supplied separately from the armature circuit. The schematic must show both supplies and their relevant controls."],"readingNotes":["Trace the field source independently from armature power.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify field supply","Identify armature supply","Reference coordinated control sequence"],"distinction":"Separately excited and series-excited motors do not share the same field-current path.","facts":[{"label":"Drawing role","value":"Rotating or linear load"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HMO1M12, VMO1M12 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-dc-motors","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["motor","contactor"],"artwork":"edu-separately-excited-dc-motor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/separately-excited-dc-motor","illustration":"https://eloragrid.ai/library/illustrations/separately-excited-dc-motor.svg"},{"slug":"dc-generator","name":"DC generator","kind":"symbol","abbreviation":"G DC","aliases":["HPW1G9","VPW1G9"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A DC generator converts mechanical input into a documented DC electrical output.","description":["A DC generator converts mechanical input into a documented DC electrical output. Its output polarity and excitation arrangement must be identified where they affect the connected system."],"readingNotes":["Follow the excitation circuit separately when the selected machine requires it.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State DC output rating","Mark polarity","Reference excitation and control"],"distinction":"A generator supplies a source; a DC motor represents a load even if the machine principles are related.","facts":[{"label":"Drawing role","value":"Generating source"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPW1G9, VPW1G9 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-generators","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["generator","25-synchronism-check"],"artwork":"edu-dc-generator","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/dc-generator","illustration":"https://eloragrid.ai/library/illustrations/dc-generator.svg"},{"slug":"compound-excited-dc-generator","name":"Compound-excited DC generator","kind":"symbol","abbreviation":"G DC COMP","aliases":["HPW1G10","VPW1G10"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A compound-excited DC generator uses documented series and shunt excitation components.","description":["A compound-excited DC generator uses documented series and shunt excitation components. The drawing must identify their connections rather than relying on a generic generator circle."],"readingNotes":["Trace each field winding relative to the armature and output circuit.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show both field components","Identify output polarity","Reference excitation connection"],"distinction":"Compound excitation combines field arrangements; it is different from a permanent-magnet generator.","facts":[{"label":"Drawing role","value":"Generating source"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPW1G10, VPW1G10 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-generators","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["generator","25-synchronism-check"],"artwork":"edu-compound-excited-dc-generator","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/compound-excited-dc-generator","illustration":"https://eloragrid.ai/library/illustrations/compound-excited-dc-generator.svg"},{"slug":"three-phase-synchronous-generator","name":"Three-phase synchronous generator","kind":"symbol","abbreviation":"G 3PH SYNC","aliases":["HPW1G7","VPW1G7"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A three-phase synchronous generator supplies a documented AC source associated with its mechanical prime mover and excitation system.","description":["A three-phase synchronous generator supplies a documented AC source associated with its mechanical prime mover and excitation system. The electrical drawing identifies terminals, neutral and generator-control connections."],"readingNotes":["Locate the voltage/current measurement points used by the generator controls.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State output and winding ratings","Show neutral arrangement","Reference excitation and protection"],"distinction":"The electrical generator representation is different from the complete mechanical generator package envelope.","facts":[{"label":"Drawing role","value":"Generating source"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPW1G7, VPW1G7 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-generators","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["generator","25-synchronism-check"],"artwork":"edu-three-phase-synchronous-generator","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-phase-synchronous-generator","illustration":"https://eloragrid.ai/library/illustrations/three-phase-synchronous-generator.svg"},{"slug":"permanent-magnet-synchronous-generator","name":"Permanent-magnet synchronous generator","kind":"symbol","abbreviation":"G 3PH PM","aliases":["HPW1G6","VPW1G6"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A permanent-magnet synchronous generator provides an AC source using a permanent magnetic excitation system.","description":["A permanent-magnet synchronous generator provides an AC source using a permanent magnetic excitation system. Any converter between this source and the AC network must be shown separately."],"readingNotes":["Distinguish machine output from the downstream converter's controlled network output.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State machine rating","Identify winding terminals","Reference converter interface"],"distinction":"Permanent-magnet excitation does not mean direct grid connection is appropriate for every machine.","facts":[{"label":"Drawing role","value":"Generating source"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPW1G6, VPW1G6 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"autodesk-generators","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["generator","25-synchronism-check"],"artwork":"edu-permanent-magnet-synchronous-generator","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/permanent-magnet-synchronous-generator","illustration":"https://eloragrid.ai/library/illustrations/permanent-magnet-synchronous-generator.svg"},{"slug":"ac-to-dc-power-supply","name":"AC-to-DC power supply","kind":"symbol","abbreviation":"PSU AC-DC","aliases":[],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An AC/DC power supply converts a documented AC input to a DC output for control or auxiliary circuits.","description":["An AC/DC power supply converts a documented AC input to a DC output for control or auxiliary circuits. Its input protection, DC common and any PE connection are shown separately."],"readingNotes":["Identify the DC output polarity and any intentional connection to earth.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State AC input range","State DC output rating","Show input protection and PE"],"distinction":"A regulated power supply includes functions beyond a bridge rectifier alone.","facts":[{"label":"Drawing role","value":"Energy conversion"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-power-supplies","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-converter","battery"],"artwork":"edu-ac-to-dc-power-supply","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/ac-to-dc-power-supply","illustration":"https://eloragrid.ai/library/illustrations/ac-to-dc-power-supply.svg"},{"slug":"dc-to-dc-converter","name":"DC-to-DC converter","kind":"symbol","abbreviation":"DC-DC","aliases":[],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A DC/DC converter changes a documented DC input into another DC output.","description":["A DC/DC converter changes a documented DC input into another DC output. Isolation, regulation and polarity depend on the selected model and must not be inferred from the conversion label."],"readingNotes":["Check whether input and output commons are connected internally.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State input/output ratings","Identify isolation specification","Show input/output polarity"],"distinction":"A DC/DC conversion function does not automatically provide galvanic isolation.","facts":[{"label":"Drawing role","value":"Energy conversion"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-power-supplies","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-converter","battery"],"artwork":"edu-dc-to-dc-converter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/dc-to-dc-converter","illustration":"https://eloragrid.ai/library/illustrations/dc-to-dc-converter.svg"},{"slug":"dc-to-ac-inverter","name":"DC-to-AC inverter","kind":"symbol","abbreviation":"INV DC-AC","aliases":[],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A DC/AC inverter converts a documented DC supply into an AC output.","description":["A DC/AC inverter converts a documented DC supply into an AC output. The output waveform, voltage, frequency and operating mode belong in the equipment and control records."],"readingNotes":["Distinguish a standalone AC output from an inverter intended to follow a network.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State DC input rating","State AC output parameters","Reference operating mode"],"distinction":"A DC/AC inverter is a conversion stage; its system-control capabilities depend on the selected equipment.","facts":[{"label":"Drawing role","value":"Energy conversion"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-power-supplies","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-pv-inverter","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-converter","battery"],"artwork":"edu-dc-to-ac-inverter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/dc-to-ac-inverter","illustration":"https://eloragrid.ai/library/illustrations/dc-to-ac-inverter.svg"},{"slug":"dc-uninterruptible-power-supply","name":"DC uninterruptible power supply","kind":"symbol","abbreviation":"UPS DC","aliases":["DC UPS"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A DC UPS maintains a documented DC load supply during a specified input interruption using an associated energy store.","description":["A DC UPS maintains a documented DC load supply during a specified input interruption using an associated energy store. The drawing identifies normal supply, storage and load paths plus monitoring signals."],"readingNotes":["Trace the battery or capacitor module separately from the DC load feed.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show normal input","Show storage connection","Reference load and autonomy data"],"distinction":"A DC UPS feeds DC loads; an AC UPS includes a documented AC output path.","facts":[{"label":"Drawing role","value":"Energy conversion"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-ups-functions","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-converter","battery"],"artwork":"edu-dc-uninterruptible-power-supply","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/dc-uninterruptible-power-supply","illustration":"https://eloragrid.ai/library/illustrations/dc-uninterruptible-power-supply.svg"},{"slug":"ac-uninterruptible-power-supply","name":"AC uninterruptible power supply","kind":"symbol","abbreviation":"UPS AC","aliases":["AC UPS"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An AC UPS provides a documented AC load supply through its normal and backup operating arrangements.","description":["An AC UPS provides a documented AC load supply through its normal and backup operating arrangements. The schematic identifies input, output and energy-storage interfaces as specified by the product."],"readingNotes":["Keep any bypass arrangement separate from the basic UPS output path.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State input/output ratings","Show storage reference","Identify bypass if provided"],"distinction":"An AC UPS output is different from the DC output of a DC UPS module.","facts":[{"label":"Drawing role","value":"Energy conversion"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-ups-functions","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-converter","battery"],"artwork":"edu-ac-uninterruptible-power-supply","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/ac-uninterruptible-power-supply","illustration":"https://eloragrid.ai/library/illustrations/ac-uninterruptible-power-supply.svg"},{"slug":"capacitor-buffer-module","name":"Capacitor buffer module","kind":"symbol","abbreviation":"BUFFER CAP","aliases":[],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A capacitor buffer module stores energy for a documented short supply-interruption duty.","description":["A capacitor buffer module stores energy for a documented short supply-interruption duty. The drawing identifies its DC connection and monitoring interface without implying battery-like long-duration autonomy."],"readingNotes":["Read buffer time at the actual connected load from the selected module data.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State DC voltage","Reference load-dependent buffer time","Show status contacts"],"distinction":"Capacitor buffering and battery-backed UPS storage have different documented capabilities.","facts":[{"label":"Drawing role","value":"Energy conversion"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-ups-functions","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-converter","battery"],"artwork":"edu-capacitor-buffer-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/capacitor-buffer-module","illustration":"https://eloragrid.ai/library/illustrations/capacitor-buffer-module.svg"},{"slug":"redundant-power-supply-decoupling-module","name":"Redundant power-supply decoupling module","kind":"symbol","abbreviation":"PSU RED","aliases":[],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A redundancy module decouples documented power-supply inputs before they feed a common load circuit.","description":["A redundancy module decouples documented power-supply inputs before they feed a common load circuit. The drawing shows each source input and the combined output so the redundancy arrangement is reviewable."],"readingNotes":["Check each source's ability to supply the required load under the defined operating condition.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show both source inputs","Identify common output","Reference monitoring/decoupling behaviour"],"distinction":"Two parallel supplies alone do not establish the same decoupling function as a redundancy module.","facts":[{"label":"Drawing role","value":"Energy conversion"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-power-supplies","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-converter","battery"],"artwork":"edu-redundant-power-supply-decoupling-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/redundant-power-supply-decoupling-module","illustration":"https://eloragrid.ai/library/illustrations/redundant-power-supply-decoupling-module.svg"},{"slug":"analog-current-signal-isolator","name":"Analog current signal isolator","kind":"symbol","abbreviation":"ISO I-I","aliases":[],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A current signal isolator transfers a documented analog current input to an output while providing the specified electrical separation.","description":["A current signal isolator transfers a documented analog current input to an output while providing the specified electrical separation. Signal input, output and auxiliary supply are distinct terminal groups."],"readingNotes":["Determine active and passive current-loop roles at both interfaces.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State input/output range","Show separate commons","Reference supply and isolation rating"],"distinction":"Signal isolation is different from changing the power-system voltage with a transformer.","facts":[{"label":"Drawing role","value":"Energy conversion"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-signal-isolator","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-converter","battery"],"artwork":"edu-analog-current-signal-isolator","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/analog-current-signal-isolator","illustration":"https://eloragrid.ai/library/illustrations/analog-current-signal-isolator.svg"},{"slug":"temperature-measuring-transducer","name":"Temperature measuring transducer","kind":"symbol","abbreviation":"TEMP TX","aliases":[],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A temperature transducer converts a documented temperature-sensor input into an instrument signal.","description":["A temperature transducer converts a documented temperature-sensor input into an instrument signal. The drawing identifies sensor type, conductor arrangement, supply and output loop."],"readingNotes":["Confirm the selected RTD or thermocouple configuration before tracing the output scaling.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name sensor type","Show input conductor count","State output range and scaling"],"distinction":"A transducer converts a measurement signal; a temperature switch produces a discrete condition.","facts":[{"label":"Drawing role","value":"Energy conversion"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-temperature-input","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["power-converter","battery"],"artwork":"edu-temperature-measuring-transducer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/temperature-measuring-transducer","illustration":"https://eloragrid.ai/library/illustrations/temperature-measuring-transducer.svg"},{"slug":"photovoltaic-inverter","name":"Photovoltaic inverter","kind":"symbol","abbreviation":"PV INV","aliases":["solar inverter"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A photovoltaic inverter converts a documented PV DC input into an AC output and provides the selected PV control functions.","description":["A photovoltaic inverter converts a documented PV DC input into an AC output and provides the selected PV control functions. Its schematic keeps DC strings, AC connection and control/protection interfaces distinct."],"readingNotes":["Check the number of documented MPPT inputs rather than assuming all DC terminals share one tracker.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify DC inputs/MPPT groups","State AC output connection","Reference network/disconnection controls"],"distinction":"A PV inverter is different from a battery converter even when both connect to the same AC bus.","facts":[{"label":"Drawing role","value":"Energy conversion"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-pv-inverter","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-pv-system","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["photovoltaic-generator","power-converter","battery"],"artwork":"edu-photovoltaic-inverter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/photovoltaic-inverter","illustration":"https://eloragrid.ai/library/illustrations/photovoltaic-inverter.svg"},{"slug":"single-phase-ac-source","name":"Single-phase AC source","kind":"symbol","abbreviation":"AC 1PH","aliases":["HPW1_1PH","VPW1_1PH"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A single-phase AC source identifies a documented source boundary in a schematic or SLD.","description":["A single-phase AC source identifies a documented source boundary in a schematic or SLD. The source label and supply data explain what provides the circuit's voltage and frequency."],"readingNotes":["Determine whether the source is a utility connection, transformer winding or auxiliary source.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name source origin","State voltage/frequency","Show conductor and neutral arrangement"],"distinction":"A source-boundary symbol is not a product-specific generator or transformer diagram.","facts":[{"label":"Drawing role","value":"Supply or network role"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPW1_1PH, VPW1_1PH (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-earthing-surge","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["generator","busbar"],"artwork":"edu-single-phase-ac-source","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/single-phase-ac-source","illustration":"https://eloragrid.ai/library/illustrations/single-phase-ac-source.svg"},{"slug":"three-phase-ac-source","name":"Three-phase AC source","kind":"symbol","abbreviation":"AC 3PH","aliases":["HPW1_3PH","VPW1_3PH"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A three-phase AC source identifies a documented three-phase supply boundary.","description":["A three-phase AC source identifies a documented three-phase supply boundary. Its nominal voltage, phase sequence and neutral availability must be stated where the design relies on them."],"readingNotes":["Locate the source boundary before interpreting upstream ownership or available fault data.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name supply origin","State voltage and phase sequence","Reference neutral/earthing arrangement"],"distinction":"Three-phase source designation does not establish an accessible neutral conductor.","facts":[{"label":"Drawing role","value":"Supply or network role"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPW1_3PH, VPW1_3PH (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-earthing-surge","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["generator","busbar"],"artwork":"edu-three-phase-ac-source","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-phase-ac-source","illustration":"https://eloragrid.ai/library/illustrations/three-phase-ac-source.svg"},{"slug":"photovoltaic-generator","name":"Photovoltaic generator","kind":"symbol","abbreviation":"PV GEN","aliases":["HPW1_S00908","VPW1_S00908","solar array"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A photovoltaic generator represents the electrical production of PV cells or modules.","description":["A photovoltaic generator represents the electrical production of PV cells or modules. On an SLD it is linked to documented series/parallel strings, DC protection and the inverter interface."],"readingNotes":["Differentiate the generating array from its inverter and any energy-storage branch.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Reference module/string arrangement","State DC ratings","Show connected inverter/protection"],"distinction":"The PV generator is a DC generating function; the inverter produces the documented AC interface.","facts":[{"label":"Drawing role","value":"Supply or network role"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HPW1_S00908, VPW1_S00908 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-pv-generator","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"pub-symbol-pv-system","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["generator","busbar"],"artwork":"edu-photovoltaic-generator","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/photovoltaic-generator","illustration":"https://eloragrid.ai/library/illustrations/photovoltaic-generator.svg"},{"slug":"solar-generating-station","name":"Solar generating station","kind":"symbol","abbreviation":"SOLAR STN","aliases":["HDV1_S00400","VDV1_S00400"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A solar generating station is a system-level representation of a documented solar-generation facility.","description":["A solar generating station is a system-level representation of a documented solar-generation facility. It identifies the facility type on a system diagram rather than replacing its internal electrical design."],"readingNotes":["Use linked SLDs to identify the array, inverter and connection equipment within the station.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name facility boundary","Reference internal SLD","Identify connection point"],"distinction":"A station-type marker is a site-level concept, not a single PV module symbol.","facts":[{"label":"Drawing role","value":"Supply or network role"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDV1_S00400, VDV1_S00400 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-station-types","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["generator","busbar"],"artwork":"edu-solar-generating-station","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/solar-generating-station","illustration":"https://eloragrid.ai/library/illustrations/solar-generating-station.svg"},{"slug":"wind-generating-station","name":"Wind generating station","kind":"symbol","abbreviation":"WIND STN","aliases":["HDV1_S00402","VDV1_S00402"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A wind generating station is a system-level representation of a documented wind-generation facility.","description":["A wind generating station is a system-level representation of a documented wind-generation facility. The internal machines, converters and collection system require separate drawing detail."],"readingNotes":["Identify the facility connection point separately from individual turbine sources.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name site boundary","Reference collector SLD","State network connection"],"distinction":"A wind-station marker does not specify the generator or converter technology of each turbine.","facts":[{"label":"Drawing role","value":"Supply or network role"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDV1_S00402, VDV1_S00402 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-station-types","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["generator","busbar"],"artwork":"edu-wind-generating-station","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/wind-generating-station","illustration":"https://eloragrid.ai/library/illustrations/wind-generating-station.svg"},{"slug":"substation","name":"Substation","kind":"symbol","abbreviation":"SUBSTATION","aliases":["HDV1_S00390","VDV1_S00390"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A substation representation identifies a documented facility boundary in a network or system diagram.","description":["A substation representation identifies a documented facility boundary in a network or system diagram. Its buses, transformers, switching devices and protection are developed on linked drawings."],"readingNotes":["Read the internal electrical arrangement from the referenced substation SLD.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name substation","Identify network connections","Reference internal drawing set"],"distinction":"A substation-type marker does not describe a complete switchgear lineup or GA footprint.","facts":[{"label":"Drawing role","value":"Supply or network role"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDV1_S00390, VDV1_S00390 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-station-types","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["generator","busbar"],"artwork":"edu-substation","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/substation","illustration":"https://eloragrid.ai/library/illustrations/substation.svg"},{"slug":"converter-substation","name":"Converter substation","kind":"symbol","abbreviation":"CONV STN","aliases":["HDV1_S00406","VDV1_S00406"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A converter-substation representation identifies a documented facility where an electrical conversion function forms part of the network connection.","description":["A converter-substation representation identifies a documented facility where an electrical conversion function forms part of the network connection. Its actual conversion equipment and AC/DC boundaries require linked design drawings."],"readingNotes":["Identify which network quantities or interfaces the station converts.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name station boundary","Show AC/DC interface labels","Reference conversion SLD"],"distinction":"A converter station is a system-level facility, not a single generic converter component.","facts":[{"label":"Drawing role","value":"Supply or network role"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDV1_S00406, VDV1_S00406 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-station-types","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["generator","busbar"],"artwork":"edu-converter-substation","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/converter-substation","illustration":"https://eloragrid.ai/library/illustrations/converter-substation.svg"},{"slug":"generic-electrical-load","name":"Generic electrical load","kind":"symbol","abbreviation":"LOAD","aliases":["HDV1_1-","VDV1_1-"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A generic electrical load identifies a documented consuming circuit or aggregate load on an SLD.","description":["A generic electrical load identifies a documented consuming circuit or aggregate load on an SLD. It is used where the equipment details are supplied through a load schedule or linked schematic."],"readingNotes":["Read the load description and ratings rather than assigning a motor function to every load endpoint.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Name load reference","State load rating/type","Cross-reference load schedule"],"distinction":"A generic load does not imply a specific motor, heater or converter construction.","facts":[{"label":"Drawing role","value":"Supply or network role"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HDV1_1-, VDV1_1- (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-one-line-load","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["generator","busbar"],"artwork":"edu-generic-electrical-load","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/generic-electrical-load","illustration":"https://eloragrid.ai/library/illustrations/generic-electrical-load.svg"},{"slug":"transformer-fed-indicator-lamp","name":"Transformer-fed indicator lamp","kind":"symbol","abbreviation":"LAMP TX","aliases":["HLT1H23A","VLT1H23A"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A transformer-fed indicator lamp includes a documented internal voltage-conversion arrangement.","description":["A transformer-fed indicator lamp includes a documented internal voltage-conversion arrangement. Its supply terminals and lamp indication are shown according to the selected assembly."],"readingNotes":["Use the assembly input rating rather than the internal lamp voltage as the wiring supply requirement.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State input voltage","Name indicated condition","Reference assembly terminals"],"distinction":"A built-in lamp transformer is different from a separately drawn panel control transformer.","facts":[{"label":"Drawing role","value":"Visual signal"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HLT1H23A, VLT1H23A (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-transformer-lights","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["indicator-lamp","relay-coil"],"artwork":"edu-transformer-fed-indicator-lamp","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/transformer-fed-indicator-lamp","illustration":"https://eloragrid.ai/library/illustrations/transformer-fed-indicator-lamp.svg"},{"slug":"push-to-test-indicator-lamp","name":"Push-to-test indicator lamp","kind":"symbol","abbreviation":"LAMP TEST","aliases":["HLT1RP","VLT1RP"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A push-to-test indicator lamp allows a documented local test of the lamp circuit.","description":["A push-to-test indicator lamp allows a documented local test of the lamp circuit. The test path and normal indication path must be distinguished."],"readingNotes":["A successful lamp test does not necessarily verify the monitored process contact.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Show normal signal source","Show test connection","State lamp supply and colour"],"distinction":"Lamp test verifies an indication path; it is not automatically a complete alarm-system test.","facts":[{"label":"Drawing role","value":"Visual signal"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HLT1RP, VLT1RP (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-test-lights","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["indicator-lamp","relay-coil"],"artwork":"edu-push-to-test-indicator-lamp","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/push-to-test-indicator-lamp","illustration":"https://eloragrid.ai/library/illustrations/push-to-test-indicator-lamp.svg"},{"slug":"led-indicator-lamp","name":"LED indicator lamp","kind":"symbol","abbreviation":"LAMP LED","aliases":["HLT1H25","VLT1H25"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An LED indicator assembly provides a documented visual signal using a semiconductor light source.","description":["An LED indicator assembly provides a documented visual signal using a semiconductor light source. Its rated supply, polarity where applicable and indication meaning must be specified."],"readingNotes":["Differentiate the complete indicator assembly from a bare LED component.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State assembly voltage","Name indicated condition","Reference polarity/terminals"],"distinction":"A rated panel LED indicator may contain internal circuitry beyond a bare light-emitting diode.","facts":[{"label":"Drawing role","value":"Visual signal"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HLT1H25, VLT1H25 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-led-lights","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["indicator-lamp","relay-coil"],"artwork":"edu-led-indicator-lamp","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/led-indicator-lamp","illustration":"https://eloragrid.ai/library/illustrations/led-indicator-lamp.svg"},{"slug":"flashing-indicator-lamp","name":"Flashing indicator lamp","kind":"symbol","abbreviation":"LAMP FLASH","aliases":["HLT1H13","VLT1H13"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A flashing indicator lamp provides a documented intermittent visual indication.","description":["A flashing indicator lamp provides a documented intermittent visual indication. The flash-generation function may be internal or separately controlled and should be identified."],"readingNotes":["Trace whether the flashing signal originates in the lamp assembly or the controller.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State supply rating","Define indication meaning","Reference flash-control source"],"distinction":"A flashing indication is different from an ordinary steady lamp driven by an unlabelled intermittent signal.","facts":[{"label":"Drawing role","value":"Visual signal"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HLT1H13, VLT1H13 (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-led-lights","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["indicator-lamp","relay-coil"],"artwork":"edu-flashing-indicator-lamp","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/flashing-indicator-lamp","illustration":"https://eloragrid.ai/library/illustrations/flashing-indicator-lamp.svg"},{"slug":"flashing-beacon","name":"Flashing beacon","kind":"symbol","abbreviation":"BEACON FLASH","aliases":["HBE1RFL","VBE1RFL"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A flashing beacon gives a documented conspicuous visual signal.","description":["A flashing beacon gives a documented conspicuous visual signal. The electrical schematic identifies its supply and command, while the layout identifies the mounting location."],"readingNotes":["Keep beacon colour and signal meaning in the indication schedule.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State voltage and colour","Name alarm/command source","Reference mounting location"],"distinction":"A beacon is a visible signalling device rather than a lighting load intended to illuminate a workspace.","facts":[{"label":"Drawing role","value":"Visual signal"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HBE1RFL, VBE1RFL (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-flashing-beacons","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["indicator-lamp","relay-coil"],"artwork":"edu-flashing-beacon","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/flashing-beacon","illustration":"https://eloragrid.ai/library/illustrations/flashing-beacon.svg"},{"slug":"rotating-beacon","name":"Rotating beacon","kind":"symbol","abbreviation":"BEACON ROT","aliases":["HBE1RRT","VBE1RRT"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A rotating beacon provides a documented rotating visual signal through its specified mechanism or assembly.","description":["A rotating beacon provides a documented rotating visual signal through its specified mechanism or assembly. Its supply and command must be recorded with the visual signal's meaning."],"readingNotes":["Check the chosen product's actual operating method rather than relying on appearance alone.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State supply rating","Name signal condition","Reference selected beacon model"],"distinction":"Rotating and flashing signal mechanisms are distinct indication descriptions.","facts":[{"label":"Drawing role","value":"Visual signal"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HBE1RRT, VBE1RRT (Autodesk identifiers; not IEC symbol numbers)"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-rotating-beacons","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["indicator-lamp","relay-coil"],"artwork":"edu-rotating-beacon","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/rotating-beacon","illustration":"https://eloragrid.ai/library/illustrations/rotating-beacon.svg"},{"slug":"plc-digital-input","name":"PLC digital input","kind":"symbol","abbreviation":"DI","aliases":[],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A PLC digital input reads a documented discrete electrical state from field wiring.","description":["A PLC digital input reads a documented discrete electrical state from field wiring. The schematic identifies input channel, signal common and field supply as required by the chosen module."],"readingNotes":["Check whether the input expects sourcing or sinking field wiring.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify channel address","Show input common/supply","Reference field signal polarity"],"distinction":"A digital input reads a state; it does not provide the power output used to drive an actuator.","facts":[{"label":"Drawing role","value":"Controller interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-digital-io","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","terminal"],"artwork":"edu-plc-digital-input","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/plc-digital-input","illustration":"https://eloragrid.ai/library/illustrations/plc-digital-input.svg"},{"slug":"plc-relay-output","name":"PLC relay output","kind":"symbol","abbreviation":"DO RELAY","aliases":[],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A PLC relay output switches a documented contact path through the module's relay interface.","description":["A PLC relay output switches a documented contact path through the module's relay interface. The load supply and contact common may be separate from the PLC electronics supply."],"readingNotes":["Trace the load source through the output contact and common terminal.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify output channel","Show load supply/common","Reference contact/load rating"],"distinction":"A relay output is a contact interface, not a transistor output with the same supply/common behaviour.","facts":[{"label":"Drawing role","value":"Controller interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-digital-io","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","terminal"],"artwork":"edu-plc-relay-output","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/plc-relay-output","illustration":"https://eloragrid.ai/library/illustrations/plc-relay-output.svg"},{"slug":"plc-transistor-output","name":"PLC transistor output","kind":"symbol","abbreviation":"DO TRANS","aliases":[],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A PLC transistor output switches a documented electronic path for a field load.","description":["A PLC transistor output switches a documented electronic path for a field load. Output polarity, common connections and load protection follow the selected module wiring instructions."],"readingNotes":["Check output sourcing or sinking behaviour before connecting the actuator.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["Identify channel and common","State output polarity","Reference load and protection requirements"],"distinction":"A transistor output differs from an isolated mechanical relay contact.","facts":[{"label":"Drawing role","value":"Controller interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-digital-io","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","terminal"],"artwork":"edu-plc-transistor-output","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/plc-transistor-output","illustration":"https://eloragrid.ai/library/illustrations/plc-transistor-output.svg"},{"slug":"plc-analog-input","name":"PLC analog input","kind":"symbol","abbreviation":"AI","aliases":[],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A PLC analog input measures a documented voltage, current or sensor quantity.","description":["A PLC analog input measures a documented voltage, current or sensor quantity. Its signal range, common and any shield/earth connection require explicit wiring information."],"readingNotes":["Identify the selected channel mode before interpreting its terminals.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State signal type/range","Show signal common and shield","Reference channel configuration"],"distinction":"Analog measurement carries a range of values; a digital input reads a discrete state.","facts":[{"label":"Drawing role","value":"Controller interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-analog-io","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","terminal"],"artwork":"edu-plc-analog-input","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/plc-analog-input","illustration":"https://eloragrid.ai/library/illustrations/plc-analog-input.svg"},{"slug":"plc-analog-output","name":"PLC analog output","kind":"symbol","abbreviation":"AO","aliases":[],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A PLC analog output provides a documented variable voltage or current signal to another device.","description":["A PLC analog output provides a documented variable voltage or current signal to another device. The receiving input and output common must match the configured signal range."],"readingNotes":["Check active/passive loop roles for current outputs.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State output range","Identify output/common terminals","Reference receiving-device input"],"distinction":"An analog output commands a continuous signal; it is different from a switched relay contact.","facts":[{"label":"Drawing role","value":"Controller interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-analog-io","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","terminal"],"artwork":"edu-plc-analog-output","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/plc-analog-output","illustration":"https://eloragrid.ai/library/illustrations/plc-analog-output.svg"},{"slug":"plc-temperature-input","name":"PLC temperature input","kind":"symbol","abbreviation":"TI","aliases":[],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A PLC temperature input connects a documented RTD, thermocouple or compatible sensor through the selected module.","description":["A PLC temperature input connects a documented RTD, thermocouple or compatible sensor through the selected module. Sensor type and conductor count determine its wiring and configuration."],"readingNotes":["Preserve thermocouple polarity or RTD lead arrangement in the schematic.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State sensor type","Show conductor/polarity arrangement","Reference channel scaling"],"distinction":"A dedicated temperature input is different from an analog input receiving a conditioned transmitter signal.","facts":[{"label":"Drawing role","value":"Controller interface"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-analog-io","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["plc-io","terminal"],"artwork":"edu-plc-temperature-input","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/plc-temperature-input","illustration":"https://eloragrid.ai/library/illustrations/plc-temperature-input.svg"},{"slug":"ga-air-circuit-breaker","name":"Air circuit breaker","kind":"object","abbreviation":"ACB","aliases":["ACB","Air circuit breaker CAD","Air circuit breaker general arrangement","Air circuit breaker panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An air circuit breaker interrupts a low-voltage power circuit and occupies a substantial assembly compartment.","description":["An air circuit breaker interrupts a low-voltage power circuit and occupies a substantial assembly compartment.","Reserve the breaker body, terminals, operating controls and any withdrawal travel. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve the breaker body, terminals, operating controls and any withdrawal travel.","A fixed breaker envelope and a withdrawable breaker plus cradle require different installation space."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve the breaker body, terminals, operating controls and any withdrawal travel.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fixed breaker envelope and a withdrawable breaker plus cradle require different installation space.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-tempower","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-air-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-air-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/ga-air-circuit-breaker.svg"},{"slug":"ga-moulded-case-circuit-breaker","name":"Moulded-case circuit breaker","kind":"object","abbreviation":"MCCB","aliases":["MCCB molded case breaker","Moulded-case circuit breaker CAD","Moulded-case circuit breaker general arrangement","Moulded-case circuit breaker panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A moulded-case breaker combines circuit switching and overcurrent protection in an insulated case.","description":["A moulded-case breaker combines circuit switching and overcurrent protection in an insulated case.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-moulded-case-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-moulded-case-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/ga-moulded-case-circuit-breaker.svg"},{"slug":"ga-miniature-circuit-breaker","name":"Miniature circuit breaker","kind":"object","abbreviation":"MCB","aliases":["MCB","Miniature circuit breaker CAD","Miniature circuit breaker general arrangement","Miniature circuit breaker panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A miniature breaker is a compact protective device commonly arranged in rows on a rail or distribution-board support.","description":["A miniature breaker is a compact protective device commonly arranged in rows on a rail or distribution-board support.","Allow space for the actual number of poles, associated auxiliaries and supply comb connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Allow space for the actual number of poles, associated auxiliaries and supply comb connections.","A module-count sketch is a planning aid; an exact footprint depends on product series and pole configuration."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Allow space for the actual number of poles, associated auxiliaries and supply comb connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A module-count sketch is a planning aid; an exact footprint depends on product series and pole configuration.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-miniature-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-miniature-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/ga-miniature-circuit-breaker.svg"},{"slug":"ga-residual-current-circuit-breaker","name":"Residual-current circuit breaker","kind":"object","abbreviation":"RCCB","aliases":["RCCB RCD","Residual-current circuit breaker CAD","Residual-current circuit breaker general arrangement","Residual-current circuit breaker panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An RCCB detects residual current and opens its associated circuit, with its function specified independently of overcurrent protection.","description":["An RCCB detects residual current and opens its associated circuit, with its function specified independently of overcurrent protection.","Show its poles and neutral arrangements in the schedule and coordinate test-button access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show its poles and neutral arrangements in the schedule and coordinate test-button access.","An RCCB and an RCBO have different protection combinations; a matching width does not establish interchangeability."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show its poles and neutral arrangements in the schedule and coordinate test-button access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An RCCB and an RCBO have different protection combinations; a matching width does not establish interchangeability.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-residual-current-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-residual-current-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/ga-residual-current-circuit-breaker.svg"},{"slug":"ga-residual-current-breaker-with-overcurrent-protection","name":"Residual-current breaker with overcurrent protection","kind":"object","abbreviation":"RCBO","aliases":["RCBO","Residual-current breaker with overcurrent protection CAD","Residual-current breaker with overcurrent protection general arrangement","Residual-current breaker with overcurrent protection panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An RCBO combines residual-current and overcurrent functions in one device.","description":["An RCBO combines residual-current and overcurrent functions in one device.","Coordinate line and neutral connections, test access and any neutral flying lead in the selected product. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate line and neutral connections, test access and any neutral flying lead in the selected product.","The protective functions and connection arrangements must be checked separately from mounting width."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate line and neutral connections, test access and any neutral flying lead in the selected product.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The protective functions and connection arrangements must be checked separately from mounting width.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-residual-current-breaker-with-overcurrent-protection","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-residual-current-breaker-with-overcurrent-protection","illustration":"https://eloragrid.ai/library/illustrations/ga-residual-current-breaker-with-overcurrent-protection.svg"},{"slug":"ga-dc-circuit-breaker","name":"DC circuit breaker","kind":"object","abbreviation":"GA","aliases":["direct current breaker","DC circuit breaker CAD","DC circuit breaker general arrangement","DC circuit breaker panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A DC breaker is selected to interrupt a specified direct-current circuit.","description":["A DC breaker is selected to interrupt a specified direct-current circuit.","Keep polarity requirements, pole connections and cable exit zones visible in the drawing package. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Keep polarity requirements, pole connections and cable exit zones visible in the drawing package.","An AC breaker cannot be treated as a DC breaker merely because both fit the same rail."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Keep polarity requirements, pole connections and cable exit zones visible in the drawing package.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An AC breaker cannot be treated as a DC breaker merely because both fit the same rail.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-dc-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-dc-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/ga-dc-circuit-breaker.svg"},{"slug":"ga-motor-protection-circuit-breaker","name":"Motor-protection circuit breaker","kind":"object","abbreviation":"MPCB","aliases":["MPCB manual motor starter","Motor-protection circuit breaker CAD","Motor-protection circuit breaker general arrangement","Motor-protection circuit breaker panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A motor-protection breaker provides switching and specified motor-circuit protective functions.","description":["A motor-protection breaker provides switching and specified motor-circuit protective functions.","Position beside its coordinated contactor where the selected assembly requires that arrangement. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Position beside its coordinated contactor where the selected assembly requires that arrangement.","A motor feeder also needs a documented starter combination and coordination study; the device outline is insufficient."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Position beside its coordinated contactor where the selected assembly requires that arrangement.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A motor feeder also needs a documented starter combination and coordination study; the device outline is insufficient.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-motor-protection-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-motor-protection-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/ga-motor-protection-circuit-breaker.svg"},{"slug":"ga-switch-disconnector","name":"Switch disconnector","kind":"object","abbreviation":"GA","aliases":["isolator load-break switch","Switch disconnector CAD","Switch disconnector general arrangement","Switch disconnector panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A switch disconnector provides the specified switching and isolation function for a power circuit.","description":["A switch disconnector provides the specified switching and isolation function for a power circuit.","Coordinate shaft, handle, door interlock and terminal approach with enclosure depth. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate shaft, handle, door interlock and terminal approach with enclosure depth.","A simple disconnector, switch disconnector and circuit breaker do not perform identical duties."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate shaft, handle, door interlock and terminal approach with enclosure depth.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A simple disconnector, switch disconnector and circuit breaker do not perform identical duties.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-switch-disconnector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-switch-disconnector","illustration":"https://eloragrid.ai/library/illustrations/ga-switch-disconnector.svg"},{"slug":"ga-fuse-switch-disconnector","name":"Fuse-switch disconnector","kind":"object","abbreviation":"GA","aliases":["switch fuse fused isolator","Fuse-switch disconnector CAD","Fuse-switch disconnector general arrangement","Fuse-switch disconnector panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A fuse-switch assembly combines a switching arrangement with replaceable fuses.","description":["A fuse-switch assembly combines a switching arrangement with replaceable fuses.","Reserve access for fuse replacement and identify whether conductors enter above, below or at the side. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve access for fuse replacement and identify whether conductors enter above, below or at the side.","The fuse carrier operating space can extend beyond the closed device body."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve access for fuse replacement and identify whether conductors enter above, below or at the side.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The fuse carrier operating space can extend beyond the closed device body.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-fuse-switch-disconnector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-fuse-switch-disconnector","illustration":"https://eloragrid.ai/library/illustrations/ga-fuse-switch-disconnector.svg"},{"slug":"ga-fuse-holder","name":"Fuse holder","kind":"object","abbreviation":"GA","aliases":["fuse base fuse carrier","Fuse holder CAD","Fuse holder general arrangement","Fuse holder panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A fuse holder supports and connects a replaceable fuse selected for the circuit.","description":["A fuse holder supports and connects a replaceable fuse selected for the circuit.","Account for insertion and removal space as well as terminal access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Account for insertion and removal space as well as terminal access.","The fuse element, holder and complete switch-fuse assembly are distinct scheduled items."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Account for insertion and removal space as well as terminal access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The fuse element, holder and complete switch-fuse assembly are distinct scheduled items.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-fuse-holder","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-fuse-holder","illustration":"https://eloragrid.ai/library/illustrations/ga-fuse-holder.svg"},{"slug":"ga-power-contactor","name":"Power contactor","kind":"object","abbreviation":"GA","aliases":["magnetic contactor","Power contactor CAD","Power contactor general arrangement","Power contactor panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A power contactor switches a power circuit through an electrically operated mechanism.","description":["A power contactor switches a power circuit through an electrically operated mechanism.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","A contactor requires separate protection and its operational rating depends on the load duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A contactor requires separate protection and its operational rating depends on the load duty.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-power-contactor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-power-contactor","illustration":"https://eloragrid.ai/library/illustrations/ga-power-contactor.svg"},{"slug":"ga-reversing-contactor-assembly","name":"Reversing contactor assembly","kind":"object","abbreviation":"GA","aliases":["forward reverse starter","Reversing contactor assembly CAD","Reversing contactor assembly general arrangement","Reversing contactor assembly panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A reversing assembly uses coordinated switching devices to change a motor connection sequence.","description":["A reversing assembly uses coordinated switching devices to change a motor connection sequence.","Show the complete paired assembly, mechanical interlock and wiring-link envelope. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show the complete paired assembly, mechanical interlock and wiring-link envelope.","Two isolated contactor outlines omit the additional space occupied by interlocks and connection kits."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show the complete paired assembly, mechanical interlock and wiring-link envelope.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Two isolated contactor outlines omit the additional space occupied by interlocks and connection kits.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-reversing-contactor-assembly","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-reversing-contactor-assembly","illustration":"https://eloragrid.ai/library/illustrations/ga-reversing-contactor-assembly.svg"},{"slug":"ga-star-delta-starter-assembly","name":"Star-delta starter assembly","kind":"object","abbreviation":"GA","aliases":["wye delta starter","Star-delta starter assembly CAD","Star-delta starter assembly general arrangement","Star-delta starter assembly panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A star-delta starter arranges switching devices to change a motor winding connection during starting.","description":["A star-delta starter arranges switching devices to change a motor winding connection during starting.","Allow the complete contactor set, overload unit and coordinated power links. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Allow the complete contactor set, overload unit and coordinated power links.","The assembly layout and terminal sequence depend on the chosen starter arrangement, not just the number of contactors."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Allow the complete contactor set, overload unit and coordinated power links.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The assembly layout and terminal sequence depend on the chosen starter arrangement, not just the number of contactors.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-star-delta-starter-assembly","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-star-delta-starter-assembly","illustration":"https://eloragrid.ai/library/illustrations/ga-star-delta-starter-assembly.svg"},{"slug":"ga-thermal-overload-relay","name":"Thermal overload relay","kind":"object","abbreviation":"GA","aliases":["motor overload unit","Thermal overload relay CAD","Thermal overload relay general arrangement","Thermal overload relay panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A thermal overload relay monitors motor-circuit loading and operates associated control contacts.","description":["A thermal overload relay monitors motor-circuit loading and operates associated control contacts.","Account for direct attachment to a contactor or a separate mounting adapter. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Account for direct attachment to a contactor or a separate mounting adapter.","An overload relay is not a short-circuit interruption device."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Account for direct attachment to a contactor or a separate mounting adapter.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An overload relay is not a short-circuit interruption device.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-thermal-overload-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-thermal-overload-relay","illustration":"https://eloragrid.ai/library/illustrations/ga-thermal-overload-relay.svg"},{"slug":"ga-electronic-motor-overload-relay","name":"Electronic motor overload relay","kind":"object","abbreviation":"GA","aliases":["electronic overload unit","Electronic motor overload relay CAD","Electronic motor overload relay general arrangement","Electronic motor overload relay panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An electronic overload device provides the specified motor monitoring and trip functions.","description":["An electronic overload device provides the specified motor monitoring and trip functions.","Locate current connections or sensors, control terminals and setting access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Locate current connections or sensors, control terminals and setting access.","Electronic monitoring features differ by model and cannot be inferred from the generic relay label."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Locate current connections or sensors, control terminals and setting access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Electronic monitoring features differ by model and cannot be inferred from the generic relay label.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-electronic-motor-overload-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-electronic-motor-overload-relay","illustration":"https://eloragrid.ai/library/illustrations/ga-electronic-motor-overload-relay.svg"},{"slug":"ga-soft-starter","name":"Soft starter","kind":"object","abbreviation":"GA","aliases":["solid-state reduced-voltage starter","Soft starter CAD","Soft starter general arrangement","Soft starter panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A soft starter controls motor starting through power-electronic switching.","description":["A soft starter controls motor starting through power-electronic switching.","Coordinate cooling clearances, bypass contactor space and segregated power/control cable routes. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate cooling clearances, bypass contactor space and segregated power/control cable routes.","A soft starter controls starting behaviour; a variable-frequency drive also controls operating frequency."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate cooling clearances, bypass contactor space and segregated power/control cable routes.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A soft starter controls starting behaviour; a variable-frequency drive also controls operating frequency.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-soft-starter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-soft-starter","illustration":"https://eloragrid.ai/library/illustrations/ga-soft-starter.svg"},{"slug":"ga-variable-frequency-drive","name":"Variable-frequency drive","kind":"object","abbreviation":"VFD","aliases":["VFD VSD inverter drive","Variable-frequency drive CAD","Variable-frequency drive general arrangement","Variable-frequency drive panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A variable-frequency drive supplies a controlled-frequency motor output.","description":["A variable-frequency drive supplies a controlled-frequency motor output.","Reserve cooling airflow, power-cable bends, control wiring and any filter or reactor space. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve cooling airflow, power-cable bends, control wiring and any filter or reactor space.","A drive cabinet envelope includes accessories and service access beyond the inverter module body."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve cooling airflow, power-cable bends, control wiring and any filter or reactor space.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A drive cabinet envelope includes accessories and service access beyond the inverter module body.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-invertek-eco","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-variable-frequency-drive","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-variable-frequency-drive","illustration":"https://eloragrid.ai/library/illustrations/ga-variable-frequency-drive.svg"},{"slug":"ga-drive-braking-resistor","name":"Drive braking resistor","kind":"object","abbreviation":"GA","aliases":["dynamic braking resistor","Drive braking resistor CAD","Drive braking resistor general arrangement","Drive braking resistor panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A braking resistor dissipates energy when specified as part of a drive braking system.","description":["A braking resistor dissipates energy when specified as part of a drive braking system.","Coordinate heat exposure, mounting surface and separation from heat-sensitive equipment. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate heat exposure, mounting surface and separation from heat-sensitive equipment.","A resistor mounting zone is a thermal coordination issue as well as a dimensional one."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate heat exposure, mounting surface and separation from heat-sensitive equipment.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A resistor mounting zone is a thermal coordination issue as well as a dimensional one.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-drive-braking-resistor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-drive-braking-resistor","illustration":"https://eloragrid.ai/library/illustrations/ga-drive-braking-resistor.svg"},{"slug":"ga-ac-line-reactor","name":"AC line reactor","kind":"object","abbreviation":"GA","aliases":["input reactor choke","AC line reactor CAD","AC line reactor general arrangement","AC line reactor panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A line reactor is an inductive device placed in a power circuit for a specified application.","description":["A line reactor is an inductive device placed in a power circuit for a specified application.","Show its mounting orientation, ventilation and heavy-conductor terminal access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show its mounting orientation, ventilation and heavy-conductor terminal access.","A reactor and a transformer may have similar packages but perform different circuit functions."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show its mounting orientation, ventilation and heavy-conductor terminal access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A reactor and a transformer may have similar packages but perform different circuit functions.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-ac-line-reactor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-ac-line-reactor","illustration":"https://eloragrid.ai/library/illustrations/ga-ac-line-reactor.svg"},{"slug":"ga-control-transformer","name":"Control transformer","kind":"object","abbreviation":"GA","aliases":["auxiliary transformer CPT","Control transformer CAD","Control transformer general arrangement","Control transformer panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A control transformer supplies an auxiliary circuit at the specified voltage.","description":["A control transformer supplies an auxiliary circuit at the specified voltage.","Reserve winding terminals, fuse arrangements and heat-dissipation space. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve winding terminals, fuse arrangements and heat-dissipation space.","A control transformer is selected for its auxiliary duty and is not a voltage-measurement transformer."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve winding terminals, fuse arrangements and heat-dissipation space.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A control transformer is selected for its auxiliary duty and is not a voltage-measurement transformer.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-control-transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-control-transformer","illustration":"https://eloragrid.ai/library/illustrations/ga-control-transformer.svg"},{"slug":"ga-dry-type-transformer-enclosure","name":"Dry-type transformer enclosure","kind":"object","abbreviation":"GA","aliases":["cast resin transformer housing","Dry-type transformer enclosure CAD","Dry-type transformer enclosure general arrangement","Dry-type transformer enclosure panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A dry-type transformer assembly requires a physical zone for windings, enclosure and ventilation.","description":["A dry-type transformer assembly requires a physical zone for windings, enclosure and ventilation.","Coordinate access doors, cable connection faces and lifting or replacement route. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate access doors, cable connection faces and lifting or replacement route.","A nameplate rating does not establish a complete installation envelope."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate access doors, cable connection faces and lifting or replacement route.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A nameplate rating does not establish a complete installation envelope.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-engineering-design","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-dry-type-transformer-enclosure","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-dry-type-transformer-enclosure","illustration":"https://eloragrid.ai/library/illustrations/ga-dry-type-transformer-enclosure.svg"},{"slug":"ga-oil-filled-transformer-installation","name":"Oil-filled transformer installation","kind":"object","abbreviation":"GA","aliases":["oil immersed distribution transformer","Oil-filled transformer installation CAD","Oil-filled transformer installation general arrangement","Oil-filled transformer installation panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An oil-filled transformer installation includes the tank and specified accessories within a site arrangement.","description":["An oil-filled transformer installation includes the tank and specified accessories within a site arrangement.","Coordinate cable boxes, radiator projections, handling access and containment interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate cable boxes, radiator projections, handling access and containment interfaces.","The tank footprint and the site installation zone are different dimensions."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate cable boxes, radiator projections, handling access and containment interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The tank footprint and the site installation zone are different dimensions.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-engineering-design","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-oil-filled-transformer-installation","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-oil-filled-transformer-installation","illustration":"https://eloragrid.ai/library/illustrations/ga-oil-filled-transformer-installation.svg"},{"slug":"ga-neutral-earthing-resistor-cabinet","name":"Neutral earthing resistor cabinet","kind":"object","abbreviation":"NER","aliases":["NER NGR grounding resistor","Neutral earthing resistor cabinet CAD","Neutral earthing resistor cabinet general arrangement","Neutral earthing resistor cabinet panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A neutral earthing resistor limits neutral-to-earth fault current in the specified system.","description":["A neutral earthing resistor limits neutral-to-earth fault current in the specified system.","Locate neutral and earth connections, ventilation and inspection access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Locate neutral and earth connections, ventilation and inspection access.","Its resistance and thermal duty are engineering selections, not dimensions supplied by this concept record."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Locate neutral and earth connections, ventilation and inspection access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its resistance and thermal duty are engineering selections, not dimensions supplied by this concept record.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-postglover-ng","relevance":"Manufacturer neutral-grounding equipment and installation references."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-neutral-earthing-resistor-cabinet","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-neutral-earthing-resistor-cabinet","illustration":"https://eloragrid.ai/library/illustrations/ga-neutral-earthing-resistor-cabinet.svg"},{"slug":"ga-power-factor-correction-capacitor-bank","name":"Power-factor-correction capacitor bank","kind":"object","abbreviation":"GA","aliases":["PFC APFC cabinet","Power-factor-correction capacitor bank CAD","Power-factor-correction capacitor bank general arrangement","Power-factor-correction capacitor bank panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A capacitor bank supplies reactive power compensation under the specified control scheme.","description":["A capacitor bank supplies reactive power compensation under the specified control scheme.","Allow the controller, switching devices, capacitor modules and any reactors within the cabinet. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Allow the controller, switching devices, capacitor modules and any reactors within the cabinet.","A capacitor-bank cabinet and an active harmonic filter address different power-quality functions."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Allow the controller, switching devices, capacitor modules and any reactors within the cabinet.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A capacitor-bank cabinet and an active harmonic filter address different power-quality functions.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-power-factor-correction-capacitor-bank","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-power-factor-correction-capacitor-bank","illustration":"https://eloragrid.ai/library/illustrations/ga-power-factor-correction-capacitor-bank.svg"},{"slug":"ga-active-harmonic-filter-cabinet","name":"Active harmonic filter cabinet","kind":"object","abbreviation":"GA","aliases":["AHF active power filter","Active harmonic filter cabinet CAD","Active harmonic filter cabinet general arrangement","Active harmonic filter cabinet panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An active harmonic filter uses controlled power electronics for its specified compensation functions.","description":["An active harmonic filter uses controlled power electronics for its specified compensation functions.","Coordinate CT wiring, mains connections, airflow and service modules. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate CT wiring, mains connections, airflow and service modules.","Filter capability and connection topology must be read from the selected product documentation."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate CT wiring, mains connections, airflow and service modules.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Filter capability and connection topology must be read from the selected product documentation.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-active-harmonic-filter-cabinet","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-active-harmonic-filter-cabinet","illustration":"https://eloragrid.ai/library/illustrations/ga-active-harmonic-filter-cabinet.svg"},{"slug":"ga-surge-protective-device-assembly","name":"Surge protective device assembly","kind":"object","abbreviation":"SPD","aliases":["SPD lightning surge protector","Surge protective device assembly CAD","Surge protective device assembly general arrangement","Surge protective device assembly panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A surge protective device limits specified transient overvoltages through its connected protection paths.","description":["A surge protective device limits specified transient overvoltages through its connected protection paths.","Place connection terminals and replacement cartridges where they can be inspected and serviced. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Place connection terminals and replacement cartridges where they can be inspected and serviced.","Device type, system arrangement and connection requirements are separate from enclosure width."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Place connection terminals and replacement cartridges where they can be inspected and serviced.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Device type, system arrangement and connection requirements are separate from enclosure width.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-surge-protective-device-assembly","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-surge-protective-device-assembly","illustration":"https://eloragrid.ai/library/illustrations/ga-surge-protective-device-assembly.svg"},{"slug":"ga-din-rail-ac-dc-power-supply","name":"DIN-rail AC/DC power supply","kind":"object","abbreviation":"GA","aliases":["switch mode PSU SMPS","DIN-rail AC/DC power supply CAD","DIN-rail AC/DC power supply general arrangement","DIN-rail AC/DC power supply panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A DIN-rail power supply converts an input supply into a specified DC auxiliary supply.","description":["A DIN-rail power supply converts an input supply into a specified DC auxiliary supply.","Leave the selected mounting and cooling space and provide accessible input/output terminals. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Leave the selected mounting and cooling space and provide accessible input/output terminals.","Its nominal output rating does not guarantee sufficient headroom for every load or transient."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Leave the selected mounting and cooling space and provide accessible input/output terminals.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its nominal output rating does not guarantee sufficient headroom for every load or transient.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-tdk-din","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-din-rail-ac-dc-power-supply","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-din-rail-ac-dc-power-supply","illustration":"https://eloragrid.ai/library/illustrations/ga-din-rail-ac-dc-power-supply.svg"},{"slug":"ga-din-rail-dc-dc-converter","name":"DIN-rail DC/DC converter","kind":"object","abbreviation":"DC","aliases":["DC converter isolated supply","DIN-rail DC/DC converter CAD","DIN-rail DC/DC converter general arrangement","DIN-rail DC/DC converter panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A DC/DC converter changes a DC supply to the specified output arrangement.","description":["A DC/DC converter changes a DC supply to the specified output arrangement.","Coordinate input/output isolation boundaries, cable routes and module cooling. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate input/output isolation boundaries, cable routes and module cooling.","A DC/DC converter is distinct from an AC/DC supply even if the mounting system matches."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate input/output isolation boundaries, cable routes and module cooling.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A DC/DC converter is distinct from an AC/DC supply even if the mounting system matches.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-din-rail-dc-dc-converter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-din-rail-dc-dc-converter","illustration":"https://eloragrid.ai/library/illustrations/ga-din-rail-dc-dc-converter.svg"},{"slug":"ga-dc-redundancy-module","name":"DC redundancy module","kind":"object","abbreviation":"GA","aliases":["ORing diode module","DC redundancy module CAD","DC redundancy module general arrangement","DC redundancy module panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A redundancy module combines specified supply paths for an auxiliary DC system.","description":["A redundancy module combines specified supply paths for an auxiliary DC system.","Draw the separate supply feeds and output wiring while reserving the selected thermal clearance. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Draw the separate supply feeds and output wiring while reserving the selected thermal clearance.","Parallel supplies do not automatically form a documented redundant system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Draw the separate supply feeds and output wiring while reserving the selected thermal clearance.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Parallel supplies do not automatically form a documented redundant system.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-tdk-din","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-dc-redundancy-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-dc-redundancy-module","illustration":"https://eloragrid.ai/library/illustrations/ga-dc-redundancy-module.svg"},{"slug":"ga-dc-buffer-module","name":"DC buffer module","kind":"object","abbreviation":"GA","aliases":["ride-through buffer","DC buffer module CAD","DC buffer module general arrangement","DC buffer module panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A buffer module supports a DC bus through specified short supply interruptions.","description":["A buffer module supports a DC bus through specified short supply interruptions.","Locate its bus terminals and identify associated protection and status signals. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Locate its bus terminals and identify associated protection and status signals.","A buffer module and a battery-backed UPS provide different storage and autonomy arrangements."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Locate its bus terminals and identify associated protection and status signals.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A buffer module and a battery-backed UPS provide different storage and autonomy arrangements.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-tdk-din","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-dc-buffer-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-dc-buffer-module","illustration":"https://eloragrid.ai/library/illustrations/ga-dc-buffer-module.svg"},{"slug":"ga-dc-ups-module","name":"DC UPS module","kind":"object","abbreviation":"GA","aliases":["DIN rail uninterruptible power supply","DC UPS module CAD","DC UPS module general arrangement","DC UPS module panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A DC UPS module manages continuity of a DC auxiliary supply with its specified energy-storage interface.","description":["A DC UPS module manages continuity of a DC auxiliary supply with its specified energy-storage interface.","Reserve the controller and storage-module zones and cross-reference alarm wiring. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve the controller and storage-module zones and cross-reference alarm wiring.","The controller outline alone does not include external batteries or their maintenance space."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve the controller and storage-module zones and cross-reference alarm wiring.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The controller outline alone does not include external batteries or their maintenance space.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-tdk-din","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-dc-ups-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-dc-ups-module","illustration":"https://eloragrid.ai/library/illustrations/ga-dc-ups-module.svg"},{"slug":"ga-battery-charger","name":"Battery charger","kind":"object","abbreviation":"DC","aliases":["DC charger rectifier","Battery charger CAD","Battery charger general arrangement","Battery charger panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A battery charger maintains a specified battery supply or starting battery system.","description":["A battery charger maintains a specified battery supply or starting battery system.","Show AC supply, DC output and battery connection routes separately. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show AC supply, DC output and battery connection routes separately.","Charging voltage and battery chemistry must match the selected battery system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show AC supply, DC output and battery connection routes separately.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Charging voltage and battery chemistry must match the selected battery system.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-cummins-application","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-battery-charger","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-battery-charger","illustration":"https://eloragrid.ai/library/illustrations/ga-battery-charger.svg"},{"slug":"ga-ac-ups-cabinet","name":"AC UPS cabinet","kind":"object","abbreviation":"GA","aliases":["uninterruptible power supply","AC UPS cabinet CAD","AC UPS cabinet general arrangement","AC UPS cabinet panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An AC UPS provides the specified continuity of supply to supported AC loads.","description":["An AC UPS provides the specified continuity of supply to supported AC loads.","Coordinate input/output cables, batteries, ventilation and service access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate input/output cables, batteries, ventilation and service access.","The UPS equipment body and its complete installation envelope are not the same."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate input/output cables, batteries, ventilation and service access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The UPS equipment body and its complete installation envelope are not the same.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-ac-ups-cabinet","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-ac-ups-cabinet","illustration":"https://eloragrid.ai/library/illustrations/ga-ac-ups-cabinet.svg"},{"slug":"ga-ups-maintenance-bypass-panel","name":"UPS maintenance bypass panel","kind":"object","abbreviation":"GA","aliases":["external bypass switchboard","UPS maintenance bypass panel CAD","UPS maintenance bypass panel general arrangement","UPS maintenance bypass panel panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A maintenance bypass arrangement provides the documented alternate supply path around a UPS.","description":["A maintenance bypass arrangement provides the documented alternate supply path around a UPS.","Coordinate switch access and interlocks with the UPS operating sequence. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate switch access and interlocks with the UPS operating sequence.","A bypass path does not imply uninterrupted transfer for every operating condition."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate switch access and interlocks with the UPS operating sequence.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A bypass path does not imply uninterrupted transfer for every operating condition.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-engineering-design","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-ups-maintenance-bypass-panel","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-ups-maintenance-bypass-panel","illustration":"https://eloragrid.ai/library/illustrations/ga-ups-maintenance-bypass-panel.svg"},{"slug":"ga-station-dc-battery-rack","name":"Station DC battery rack","kind":"object","abbreviation":"GA","aliases":["control battery stand","Station DC battery rack CAD","Station DC battery rack general arrangement","Station DC battery rack panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A battery rack supports cells or modules for a stationary auxiliary DC system.","description":["A battery rack supports cells or modules for a stationary auxiliary DC system.","Coordinate terminals, lifting/removal access and the selected battery environment. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate terminals, lifting/removal access and the selected battery environment.","A rack arrangement and a cabinet arrangement impose different access and enclosure requirements."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate terminals, lifting/removal access and the selected battery environment.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A rack arrangement and a cabinet arrangement impose different access and enclosure requirements.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-cummins-application","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-station-dc-battery-rack","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-station-dc-battery-rack","illustration":"https://eloragrid.ai/library/illustrations/ga-station-dc-battery-rack.svg"},{"slug":"ga-plc-cpu-module","name":"PLC CPU module","kind":"object","abbreviation":"GA","aliases":["programmable logic controller processor","PLC CPU module CAD","PLC CPU module general arrangement","PLC CPU module panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A PLC CPU executes the programmed control logic of an automation system.","description":["A PLC CPU executes the programmed control logic of an automation system.","Position expansion interfaces, communication ports and removable memory access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Position expansion interfaces, communication ports and removable memory access.","The CPU is one part of a system that also needs power, I/O and communications."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Position expansion interfaces, communication ports and removable memory access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The CPU is one part of a system that also needs power, I/O and communications.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-plc-cpu-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-plc-cpu-module","illustration":"https://eloragrid.ai/library/illustrations/ga-plc-cpu-module.svg"},{"slug":"ga-plc-power-module","name":"PLC power module","kind":"object","abbreviation":"GA","aliases":["controller rack supply","PLC power module CAD","PLC power module general arrangement","PLC power module panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A PLC power module supplies the specified controller and expansion system.","description":["A PLC power module supplies the specified controller and expansion system.","Keep its input protection and rack connections consistent with the selected platform. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Keep its input protection and rack connections consistent with the selected platform.","A controller power module is not necessarily interchangeable with a general external DC supply."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Keep its input protection and rack connections consistent with the selected platform.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A controller power module is not necessarily interchangeable with a general external DC supply.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-plc-power-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-plc-power-module","illustration":"https://eloragrid.ai/library/illustrations/ga-plc-power-module.svg"},{"slug":"ga-digital-input-module","name":"Digital input module","kind":"object","abbreviation":"GA","aliases":["DI discrete input card","Digital input module CAD","Digital input module general arrangement","Digital input module panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A digital input module brings discrete field states into a controller.","description":["A digital input module brings discrete field states into a controller.","Reserve removable terminal access and document commons and channel grouping. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve removable terminal access and document commons and channel grouping.","Channel quantity does not identify voltage, polarity or isolation arrangements."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve removable terminal access and document commons and channel grouping.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Channel quantity does not identify voltage, polarity or isolation arrangements.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-digital-input-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-digital-input-module","illustration":"https://eloragrid.ai/library/illustrations/ga-digital-input-module.svg"},{"slug":"ga-digital-output-module","name":"Digital output module","kind":"object","abbreviation":"GA","aliases":["DO discrete output card","Digital output module CAD","Digital output module general arrangement","Digital output module panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A digital output module switches or signals discrete outputs under controller command.","description":["A digital output module switches or signals discrete outputs under controller command.","Coordinate load terminals, shared supply groups and any interface relays. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate load terminals, shared supply groups and any interface relays.","Relay, transistor and other output types have different circuit interfaces."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate load terminals, shared supply groups and any interface relays.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Relay, transistor and other output types have different circuit interfaces.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-digital-output-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-digital-output-module","illustration":"https://eloragrid.ai/library/illustrations/ga-digital-output-module.svg"},{"slug":"ga-analogue-input-module","name":"Analogue input module","kind":"object","abbreviation":"GA","aliases":["AI analog input card","Analogue input module CAD","Analogue input module general arrangement","Analogue input module panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An analogue input module receives the specified continuous measurement signals.","description":["An analogue input module receives the specified continuous measurement signals.","Coordinate shielding, channel isolation and accessible termination points. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate shielding, channel isolation and accessible termination points.","A current input, voltage input and temperature input cannot be assumed equivalent."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate shielding, channel isolation and accessible termination points.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A current input, voltage input and temperature input cannot be assumed equivalent.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-analogue-input-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-analogue-input-module","illustration":"https://eloragrid.ai/library/illustrations/ga-analogue-input-module.svg"},{"slug":"ga-analogue-output-module","name":"Analogue output module","kind":"object","abbreviation":"GA","aliases":["AO analog output card","Analogue output module CAD","Analogue output module general arrangement","Analogue output module panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An analogue output module sends the specified continuous command signals.","description":["An analogue output module sends the specified continuous command signals.","Document output commons, shielding and the receiving-device connection. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Document output commons, shielding and the receiving-device connection.","A module outline does not state its configured signal range or channel isolation."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Document output commons, shielding and the receiving-device connection.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A module outline does not state its configured signal range or channel isolation.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-analogue-output-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-analogue-output-module","illustration":"https://eloragrid.ai/library/illustrations/ga-analogue-output-module.svg"},{"slug":"ga-remote-i-o-station","name":"Remote I/O station","kind":"object","abbreviation":"GA","aliases":["distributed IO island","Remote I/O station CAD","Remote I/O station general arrangement","Remote I/O station panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A remote I/O station places input and output interfaces away from a controller CPU.","description":["A remote I/O station places input and output interfaces away from a controller CPU.","Include the coupler, power feeds, complete module row and end accessories. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Include the coupler, power feeds, complete module row and end accessories.","A network coupler is not a stand-alone PLC processor."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Include the coupler, power feeds, complete module row and end accessories.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A network coupler is not a stand-alone PLC processor.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-remote-i-o-station","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-remote-i-o-station","illustration":"https://eloragrid.ai/library/illustrations/ga-remote-i-o-station.svg"},{"slug":"ga-hmi-touchscreen","name":"HMI touchscreen","kind":"object","abbreviation":"GA","aliases":["operator panel human machine interface","HMI touchscreen CAD","HMI touchscreen general arrangement","HMI touchscreen panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An HMI presents operating information and control interfaces to the user.","description":["An HMI presents operating information and control interfaces to the user.","Coordinate the door cut-out, mounting clips, rear depth and cable bend zone. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate the door cut-out, mounting clips, rear depth and cable bend zone.","Display diagonal is different from cut-out and overall enclosure dimensions."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate the door cut-out, mounting clips, rear depth and cable bend zone.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Display diagonal is different from cut-out and overall enclosure dimensions.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-hmi-touchscreen","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-hmi-touchscreen","illustration":"https://eloragrid.ai/library/illustrations/ga-hmi-touchscreen.svg"},{"slug":"ga-industrial-panel-pc","name":"Industrial panel PC","kind":"object","abbreviation":"GA","aliases":["IPC industrial computer","Industrial panel PC CAD","Industrial panel PC general arrangement","Industrial panel PC panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An industrial panel computer provides a computing platform within an equipment arrangement.","description":["An industrial panel computer provides a computing platform within an equipment arrangement.","Show mounting, cooling and peripheral connections; reserve service access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show mounting, cooling and peripheral connections; reserve service access.","An industrial PC and a dedicated HMI can share a screen format while having different interfaces."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show mounting, cooling and peripheral connections; reserve service access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An industrial PC and a dedicated HMI can share a screen format while having different interfaces.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-industrial-panel-pc","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-industrial-panel-pc","illustration":"https://eloragrid.ai/library/illustrations/ga-industrial-panel-pc.svg"},{"slug":"ga-industrial-ethernet-switch","name":"Industrial Ethernet switch","kind":"object","abbreviation":"GA","aliases":["network switch","Industrial Ethernet switch CAD","Industrial Ethernet switch general arrangement","Industrial Ethernet switch panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An industrial Ethernet switch interconnects devices in the specified communication network.","description":["An industrial Ethernet switch interconnects devices in the specified communication network.","Reserve power terminals, ports, patch-lead bends and optical-module access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve power terminals, ports, patch-lead bends and optical-module access.","Port count does not determine protocol capability, redundancy or time synchronisation support."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve power terminals, ports, patch-lead bends and optical-module access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Port count does not determine protocol capability, redundancy or time synchronisation support.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-industrial-ethernet-switch","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-industrial-ethernet-switch","illustration":"https://eloragrid.ai/library/illustrations/ga-industrial-ethernet-switch.svg"},{"slug":"ga-industrial-vpn-router","name":"Industrial VPN router","kind":"object","abbreviation":"GA","aliases":["remote access gateway","Industrial VPN router CAD","Industrial VPN router general arrangement","Industrial VPN router panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A remote-access router provides the specified network interface between control equipment and other networks.","description":["A remote-access router provides the specified network interface between control equipment and other networks.","Coordinate antenna or network connections, supply and segregation boundaries. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate antenna or network connections, supply and segregation boundaries.","Physical placement does not establish cybersecurity configuration or permission to connect a plant."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate antenna or network connections, supply and segregation boundaries.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Physical placement does not establish cybersecurity configuration or permission to connect a plant.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-industrial-vpn-router","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-industrial-vpn-router","illustration":"https://eloragrid.ai/library/illustrations/ga-industrial-vpn-router.svg"},{"slug":"ga-fibre-optic-patch-panel","name":"Fibre-optic patch panel","kind":"object","abbreviation":"GA","aliases":["optical distribution frame","Fibre-optic patch panel CAD","Fibre-optic patch panel general arrangement","Fibre-optic patch panel panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A fibre patch panel organises optical terminations and patch connections.","description":["A fibre patch panel organises optical terminations and patch connections.","Keep the selected fibre bend zones and front/rear service access clear. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Keep the selected fibre bend zones and front/rear service access clear.","A fibre termination enclosure is distinct from active Ethernet switching equipment."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Keep the selected fibre bend zones and front/rear service access clear.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fibre termination enclosure is distinct from active Ethernet switching equipment.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-fibre-optic-patch-panel","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-fibre-optic-patch-panel","illustration":"https://eloragrid.ai/library/illustrations/ga-fibre-optic-patch-panel.svg"},{"slug":"ga-communication-gateway","name":"Communication gateway","kind":"object","abbreviation":"GA","aliases":["protocol converter","Communication gateway CAD","Communication gateway general arrangement","Communication gateway panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A gateway connects the documented communication protocols or network boundaries.","description":["A gateway connects the documented communication protocols or network boundaries.","Show each port and supply connection in the interface schedule. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show each port and supply connection in the interface schedule.","A gateway translates specified interfaces; it does not imply universal protocol compatibility."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show each port and supply connection in the interface schedule.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A gateway translates specified interfaces; it does not imply universal protocol compatibility.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-communication-gateway","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-communication-gateway","illustration":"https://eloragrid.ai/library/illustrations/ga-communication-gateway.svg"},{"slug":"ga-interface-relay-module","name":"Interface relay module","kind":"object","abbreviation":"GA","aliases":["interposing relay","Interface relay module CAD","Interface relay module general arrangement","Interface relay module panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An interface relay separates a controller signal from the specified switched circuit.","description":["An interface relay separates a controller signal from the specified switched circuit.","Coordinate coil supply, contact terminals and replaceable relay access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate coil supply, contact terminals and replaceable relay access.","Its contact function and ratings remain model-specific."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate coil supply, contact terminals and replaceable relay access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its contact function and ratings remain model-specific.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-interface-relay-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-interface-relay-module","illustration":"https://eloragrid.ai/library/illustrations/ga-interface-relay-module.svg"},{"slug":"ga-relay-socket","name":"Relay socket","kind":"object","abbreviation":"GA","aliases":["plug-in relay base","Relay socket CAD","Relay socket general arrangement","Relay socket panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A relay socket supports a plug-in relay and its associated connections.","description":["A relay socket supports a plug-in relay and its associated connections.","Show the socket plus relay height, retaining clip and removal space. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show the socket plus relay height, retaining clip and removal space.","A socket pin pattern does not establish compatibility with every relay of the same apparent size."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show the socket plus relay height, retaining clip and removal space.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A socket pin pattern does not establish compatibility with every relay of the same apparent size.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-relay-socket","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-relay-socket","illustration":"https://eloragrid.ai/library/illustrations/ga-relay-socket.svg"},{"slug":"ga-timer-relay","name":"Timer relay","kind":"object","abbreviation":"GA","aliases":["time delay relay","Timer relay CAD","Timer relay general arrangement","Timer relay panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A timer relay changes its outputs according to the selected time function.","description":["A timer relay changes its outputs according to the selected time function.","Leave the setting controls and terminal labels accessible. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Leave the setting controls and terminal labels accessible.","On-delay, off-delay and other modes require explicit schematic and schedule descriptions."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Leave the setting controls and terminal labels accessible.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"On-delay, off-delay and other modes require explicit schematic and schedule descriptions.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-timer-relay","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-timer-relay","illustration":"https://eloragrid.ai/library/illustrations/ga-timer-relay.svg"},{"slug":"ga-safety-relay-module","name":"Safety relay module","kind":"object","abbreviation":"GA","aliases":["machine safety relay","Safety relay module CAD","Safety relay module general arrangement","Safety relay module panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A safety relay performs specified monitored control functions within a documented safety circuit.","description":["A safety relay performs specified monitored control functions within a documented safety circuit.","Coordinate input channels, reset circuitry and monitored output interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate input channels, reset circuitry and monitored output interfaces.","The module name alone does not establish the safety performance of the complete system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate input channels, reset circuitry and monitored output interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The module name alone does not establish the safety performance of the complete system.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-safety-relay-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-safety-relay-module","illustration":"https://eloragrid.ai/library/illustrations/ga-safety-relay-module.svg"},{"slug":"ga-signal-conditioner","name":"Signal conditioner","kind":"object","abbreviation":"GA","aliases":["isolating transducer signal converter","Signal conditioner CAD","Signal conditioner general arrangement","Signal conditioner panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A signal conditioner converts or isolates the specified instrumentation signal.","description":["A signal conditioner converts or isolates the specified instrumentation signal.","Coordinate input/output ranges, supply and shielding in separate terminal groups. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate input/output ranges, supply and shielding in separate terminal groups.","Signal conditioning does not replace a protection relay unless that duty is explicitly specified."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate input/output ranges, supply and shielding in separate terminal groups.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Signal conditioning does not replace a protection relay unless that duty is explicitly specified.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-signal-conditioner","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-signal-conditioner","illustration":"https://eloragrid.ai/library/illustrations/ga-signal-conditioner.svg"},{"slug":"ga-terminal-marshalling-interface","name":"Terminal marshalling interface","kind":"object","abbreviation":"GA","aliases":["IO marshalling module","Terminal marshalling interface CAD","Terminal marshalling interface general arrangement","Terminal marshalling interface panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A marshalling interface organises field circuits and controller connections.","description":["A marshalling interface organises field circuits and controller connections.","Reserve plugs, labels and cable exits for each defined signal group. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve plugs, labels and cable exits for each defined signal group.","A neat physical row does not establish the electrical channel mapping."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve plugs, labels and cable exits for each defined signal group.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A neat physical row does not establish the electrical channel mapping.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-terminal-marshalling-interface","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-terminal-marshalling-interface","illustration":"https://eloragrid.ai/library/illustrations/ga-terminal-marshalling-interface.svg"},{"slug":"ga-feed-through-terminal-block","name":"Feed-through terminal block","kind":"object","abbreviation":"GA","aliases":["through terminal","Feed-through terminal block CAD","Feed-through terminal block general arrangement","Feed-through terminal block panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A feed-through terminal provides a defined wiring connection across a terminal position.","description":["A feed-through terminal provides a defined wiring connection across a terminal position.","Document terminal number, wire sides and end accessories. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Document terminal number, wire sides and end accessories.","Its rail mounting and conductor capacity are product-specific."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Document terminal number, wire sides and end accessories.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its rail mounting and conductor capacity are product-specific.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-terminals","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-feed-through-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-feed-through-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/ga-feed-through-terminal-block.svg"},{"slug":"ga-protective-earth-terminal-block","name":"Protective-earth terminal block","kind":"object","abbreviation":"GA","aliases":["PE earth terminal","Protective-earth terminal block CAD","Protective-earth terminal block general arrangement","Protective-earth terminal block panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A protective-earth terminal provides the specified connection between conductors and the earthing arrangement.","description":["A protective-earth terminal provides the specified connection between conductors and the earthing arrangement.","Coordinate rail bonding and label the connection purpose. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate rail bonding and label the connection purpose.","A protective-earth terminal is different from an isolated signal-earth terminal."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate rail bonding and label the connection purpose.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A protective-earth terminal is different from an isolated signal-earth terminal.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-terminals","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-protective-earth-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-protective-earth-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/ga-protective-earth-terminal-block.svg"},{"slug":"ga-multi-level-terminal-block","name":"Multi-level terminal block","kind":"object","abbreviation":"GA","aliases":["double deck triple deck terminal","Multi-level terminal block CAD","Multi-level terminal block general arrangement","Multi-level terminal block panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A multi-level terminal groups distinct connections at several levels within one rail position.","description":["A multi-level terminal groups distinct connections at several levels within one rail position.","Show level numbering and access for bridges and wire insertion. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show level numbering and access for bridges and wire insertion.","Physical levels do not necessarily share electrical continuity."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show level numbering and access for bridges and wire insertion.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Physical levels do not necessarily share electrical continuity.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-terminals","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-multi-level-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-multi-level-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/ga-multi-level-terminal-block.svg"},{"slug":"ga-fuse-terminal-block","name":"Fuse terminal block","kind":"object","abbreviation":"GA","aliases":["fused terminal","Fuse terminal block CAD","Fuse terminal block general arrangement","Fuse terminal block panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A fuse terminal combines a terminal position with a selected fuse arrangement.","description":["A fuse terminal combines a terminal position with a selected fuse arrangement.","Reserve carrier-opening space and identify fuse type and indication wiring. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve carrier-opening space and identify fuse type and indication wiring.","A fused terminal and a circuit-breaker module have different replacement and protection arrangements."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve carrier-opening space and identify fuse type and indication wiring.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fused terminal and a circuit-breaker module have different replacement and protection arrangements.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-terminals","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-fuse-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-fuse-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/ga-fuse-terminal-block.svg"},{"slug":"ga-disconnect-terminal-block","name":"Disconnect terminal block","kind":"object","abbreviation":"GA","aliases":["knife disconnect terminal","Disconnect terminal block CAD","Disconnect terminal block general arrangement","Disconnect terminal block panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A disconnect terminal provides a defined separable point in a wiring circuit.","description":["A disconnect terminal provides a defined separable point in a wiring circuit.","Show the opening direction, test-access space and normal operating position. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show the opening direction, test-access space and normal operating position.","A signal disconnect terminal should not be assumed suitable for CT secondary testing."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show the opening direction, test-access space and normal operating position.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A signal disconnect terminal should not be assumed suitable for CT secondary testing.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-terminals","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-disconnect-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-disconnect-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/ga-disconnect-terminal-block.svg"},{"slug":"ga-ct-shorting-test-terminal","name":"CT shorting test terminal","kind":"object","abbreviation":"GA","aliases":["current transformer test block","CT shorting test terminal CAD","CT shorting test terminal general arrangement","CT shorting test terminal panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A CT test terminal supports the specified measuring and test connection arrangement.","description":["A CT test terminal supports the specified measuring and test connection arrangement.","Cross-reference shorting links, terminal sequence and the product operating instructions. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Cross-reference shorting links, terminal sequence and the product operating instructions.","CT circuits require their documented test sequence; a generic disconnect arrangement is insufficient."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Cross-reference shorting links, terminal sequence and the product operating instructions.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"CT circuits require their documented test sequence; a generic disconnect arrangement is insufficient.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-terminals","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-ct-shorting-test-terminal","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-ct-shorting-test-terminal","illustration":"https://eloragrid.ai/library/illustrations/ga-ct-shorting-test-terminal.svg"},{"slug":"ga-distribution-terminal-block","name":"Distribution terminal block","kind":"object","abbreviation":"GA","aliases":["power distribution block","Distribution terminal block CAD","Distribution terminal block general arrangement","Distribution terminal block panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A distribution block divides a supplied circuit among specified outgoing connections.","description":["A distribution block divides a supplied circuit among specified outgoing connections.","Coordinate incoming conductor size, outgoing routes and protection references. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate incoming conductor size, outgoing routes and protection references.","The number of outlets does not establish equal current capacity or permitted circuit grouping."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate incoming conductor size, outgoing routes and protection references.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The number of outlets does not establish equal current capacity or permitted circuit grouping.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-distribution-terminal-block","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-distribution-terminal-block","illustration":"https://eloragrid.ai/library/illustrations/ga-distribution-terminal-block.svg"},{"slug":"ga-pluggable-terminal-connector","name":"Pluggable terminal connector","kind":"object","abbreviation":"GA","aliases":["removable terminal plug","Pluggable terminal connector CAD","Pluggable terminal connector general arrangement","Pluggable terminal connector panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A pluggable terminal arrangement separates a wiring connector from its mating interface.","description":["A pluggable terminal arrangement separates a wiring connector from its mating interface.","Allow connector extraction travel and wire bending space. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Allow connector extraction travel and wire bending space.","Identical pitch alone does not prove mating compatibility."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Allow connector extraction travel and wire bending space.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Identical pitch alone does not prove mating compatibility.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-terminals","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-pluggable-terminal-connector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-pluggable-terminal-connector","illustration":"https://eloragrid.ai/library/illustrations/ga-pluggable-terminal-connector.svg"},{"slug":"ga-terminal-end-stop","name":"Terminal end stop","kind":"object","abbreviation":"GA","aliases":["rail end clamp","Terminal end stop CAD","Terminal end stop general arrangement","Terminal end stop panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An end stop retains a specified terminal assembly on its mounting rail.","description":["An end stop retains a specified terminal assembly on its mounting rail.","Include end-stop space in the terminal-row length. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Include end-stop space in the terminal-row length.","It is an assembly accessory, not an electrical terminal position."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Include end-stop space in the terminal-row length.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"It is an assembly accessory, not an electrical terminal position.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-terminals","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-terminal-end-stop","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-terminal-end-stop","illustration":"https://eloragrid.ai/library/illustrations/ga-terminal-end-stop.svg"},{"slug":"ga-terminal-marker-strip","name":"Terminal marker strip","kind":"object","abbreviation":"GA","aliases":["terminal identification label","Terminal marker strip CAD","Terminal marker strip general arrangement","Terminal marker strip panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A marker strip carries identification for the terminal arrangement.","description":["A marker strip carries identification for the terminal arrangement.","Align marker references with the schematic and terminal schedule. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Align marker references with the schematic and terminal schedule.","A label sequence must follow actual terminal mapping rather than decorative numbering."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Align marker references with the schematic and terminal schedule.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A label sequence must follow actual terminal mapping rather than decorative numbering.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-terminals","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-terminal-marker-strip","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-terminal-marker-strip","illustration":"https://eloragrid.ai/library/illustrations/ga-terminal-marker-strip.svg"},{"slug":"ga-din-mounting-rail","name":"DIN mounting rail","kind":"object","abbreviation":"GA","aliases":["DIN rail TS35 rail","DIN mounting rail CAD","DIN mounting rail general arrangement","DIN mounting rail panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A mounting rail provides a mechanical support system for compatible components.","description":["A mounting rail provides a mechanical support system for compatible components.","Coordinate rail profile, fixing points and remaining terminal insertion space. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate rail profile, fixing points and remaining terminal insertion space.","A rail profile designation is not an equipment footprint or load-bearing assessment."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate rail profile, fixing points and remaining terminal insertion space.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A rail profile designation is not an equipment footprint or load-bearing assessment.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-din-mounting-rail","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-din-mounting-rail","illustration":"https://eloragrid.ai/library/illustrations/ga-din-mounting-rail.svg"},{"slug":"ga-slotted-wiring-duct","name":"Slotted wiring duct","kind":"object","abbreviation":"GA","aliases":["wire duct trunking","Slotted wiring duct CAD","Slotted wiring duct general arrangement","Slotted wiring duct panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A slotted duct routes internal panel wiring along a controlled path.","description":["A slotted duct routes internal panel wiring along a controlled path.","Reserve cover-removal space and access from component terminals into the duct. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve cover-removal space and access from component terminals into the duct.","Duct outside dimensions and usable wire space are different quantities."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve cover-removal space and access from component terminals into the duct.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Duct outside dimensions and usable wire space are different quantities.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-slotted-wiring-duct","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-slotted-wiring-duct","illustration":"https://eloragrid.ai/library/illustrations/ga-slotted-wiring-duct.svg"},{"slug":"ga-cable-gland","name":"Cable gland","kind":"object","abbreviation":"GA","aliases":["cable entry gland","Cable gland CAD","Cable gland general arrangement","Cable gland panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A cable gland secures and, where specified, seals a cable at an enclosure entry.","description":["A cable gland secures and, where specified, seals a cable at an enclosure entry.","Show entry holes, nut access and the selected cable approach. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show entry holes, nut access and the selected cable approach.","A hole diameter alone does not establish sealing, armour termination or cable compatibility."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show entry holes, nut access and the selected cable approach.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A hole diameter alone does not establish sealing, armour termination or cable compatibility.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-cable-gland","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-cable-gland","illustration":"https://eloragrid.ai/library/illustrations/ga-cable-gland.svg"},{"slug":"ga-cable-entry-frame","name":"Cable-entry frame","kind":"object","abbreviation":"GA","aliases":["modular cable transit","Cable-entry frame CAD","Cable-entry frame general arrangement","Cable-entry frame panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A cable-entry frame organises one or more cables through a documented enclosure opening.","description":["A cable-entry frame organises one or more cables through a documented enclosure opening.","Coordinate cut-out, frame depth, split inserts and service access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate cut-out, frame depth, split inserts and service access.","A modular transit and individual cable glands use different assembly interfaces."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate cut-out, frame depth, split inserts and service access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A modular transit and individual cable glands use different assembly interfaces.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-cable-entry-frame","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-cable-entry-frame","illustration":"https://eloragrid.ai/library/illustrations/ga-cable-entry-frame.svg"},{"slug":"ga-bulkhead-connector","name":"Bulkhead connector","kind":"object","abbreviation":"GA","aliases":["panel feedthrough connector","Bulkhead connector CAD","Bulkhead connector general arrangement","Bulkhead connector panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A bulkhead connector provides a separable electrical or communication interface at a panel surface.","description":["A bulkhead connector provides a separable electrical or communication interface at a panel surface.","Reserve front and rear connector bodies, locking hardware and cable bends. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve front and rear connector bodies, locking hardware and cable bends.","A connector face outline does not describe pin assignment or electrical capability."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve front and rear connector bodies, locking hardware and cable bends.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A connector face outline does not describe pin assignment or electrical capability.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-bulkhead-connector","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-bulkhead-connector","illustration":"https://eloragrid.ai/library/illustrations/ga-bulkhead-connector.svg"},{"slug":"ga-cable-cleat","name":"Cable cleat","kind":"object","abbreviation":"GA","aliases":["short circuit cable restraint","Cable cleat CAD","Cable cleat general arrangement","Cable cleat panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A cable cleat restrains specified cables along a support route.","description":["A cable cleat restrains specified cables along a support route.","Coordinate fixing points, cable arrangement and support interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate fixing points, cable arrangement and support interfaces.","A cable tie and a cable cleat are not interchangeable restraint devices."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate fixing points, cable arrangement and support interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A cable tie and a cable cleat are not interchangeable restraint devices.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"cable-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-cable-cleat","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-cable-cleat","illustration":"https://eloragrid.ai/library/illustrations/ga-cable-cleat.svg"},{"slug":"ga-perforated-cable-tray","name":"Perforated cable tray","kind":"object","abbreviation":"GA","aliases":["cable tray","Perforated cable tray CAD","Perforated cable tray general arrangement","Perforated cable tray panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A cable tray supports routed cables with the specified tray and support arrangement.","description":["A cable tray supports routed cables with the specified tray and support arrangement.","Show tray route, fittings, support spacing references and changes of level. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show tray route, fittings, support spacing references and changes of level.","Tray width alone does not establish capacity, bonding or permissible cable grouping."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show tray route, fittings, support spacing references and changes of level.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Tray width alone does not establish capacity, bonding or permissible cable grouping.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"cable-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-perforated-cable-tray","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-perforated-cable-tray","illustration":"https://eloragrid.ai/library/illustrations/ga-perforated-cable-tray.svg"},{"slug":"ga-wire-mesh-cable-basket","name":"Wire-mesh cable basket","kind":"object","abbreviation":"GA","aliases":["basket tray","Wire-mesh cable basket CAD","Wire-mesh cable basket general arrangement","Wire-mesh cable basket panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A wire-mesh basket provides a cable support path for the selected installation.","description":["A wire-mesh basket provides a cable support path for the selected installation.","Coordinate route bends, joining pieces and supports. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate route bends, joining pieces and supports.","Field-cut basket geometry requires the manufacturer's fitting and bonding details."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate route bends, joining pieces and supports.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Field-cut basket geometry requires the manufacturer's fitting and bonding details.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"cable-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-wire-mesh-cable-basket","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-wire-mesh-cable-basket","illustration":"https://eloragrid.ai/library/illustrations/ga-wire-mesh-cable-basket.svg"},{"slug":"ga-cable-tray-horizontal-bend","name":"Cable-tray horizontal bend","kind":"object","abbreviation":"GA","aliases":["tray elbow","Cable-tray horizontal bend CAD","Cable-tray horizontal bend general arrangement","Cable-tray horizontal bend panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A horizontal bend changes the direction of a cable-support route in plan.","description":["A horizontal bend changes the direction of a cable-support route in plan.","Reserve the fitting's full envelope and cable bending path. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve the fitting's full envelope and cable bending path.","A sharp line corner does not describe the available cable bend radius."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve the fitting's full envelope and cable bending path.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A sharp line corner does not describe the available cable bend radius.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"cable-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-cable-tray-horizontal-bend","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-cable-tray-horizontal-bend","illustration":"https://eloragrid.ai/library/illustrations/ga-cable-tray-horizontal-bend.svg"},{"slug":"ga-cable-tray-vertical-riser","name":"Cable-tray vertical riser","kind":"object","abbreviation":"GA","aliases":["tray riser bend","Cable-tray vertical riser CAD","Cable-tray vertical riser general arrangement","Cable-tray vertical riser panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A riser fitting changes the level of a cable-support route.","description":["A riser fitting changes the level of a cable-support route.","Show elevation and the cable approach above and below the fitting. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show elevation and the cable approach above and below the fitting.","Plan drawings need an elevation reference to describe this fitting adequately."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show elevation and the cable approach above and below the fitting.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Plan drawings need an elevation reference to describe this fitting adequately.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"cable-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-cable-tray-vertical-riser","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-cable-tray-vertical-riser","illustration":"https://eloragrid.ai/library/illustrations/ga-cable-tray-vertical-riser.svg"},{"slug":"ga-cable-support-bracket","name":"Cable support bracket","kind":"object","abbreviation":"GA","aliases":["tray cantilever support","Cable support bracket CAD","Cable support bracket general arrangement","Cable support bracket panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A support bracket transfers cable-route loads into a documented structural support.","description":["A support bracket transfers cable-route loads into a documented structural support.","Coordinate fixing surfaces and projection into room access zones. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate fixing surfaces and projection into room access zones.","A bracket outline is not a structural load verification."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate fixing surfaces and projection into room access zones.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A bracket outline is not a structural load verification.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"cable-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-cable-support-bracket","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-cable-support-bracket","illustration":"https://eloragrid.ai/library/illustrations/ga-cable-support-bracket.svg"},{"slug":"ga-cable-trench","name":"Cable trench","kind":"object","abbreviation":"GA","aliases":["electrical service trench","Cable trench CAD","Cable trench general arrangement","Cable trench panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A cable trench provides a below-floor route for the specified cabling installation.","description":["A cable trench provides a below-floor route for the specified cabling installation.","Coordinate cover access, entry points, drainage interfaces and crossings. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate cover access, entry points, drainage interfaces and crossings.","The civil trench boundary and the installed cable support arrangement are separate records."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate cover access, entry points, drainage interfaces and crossings.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The civil trench boundary and the installed cable support arrangement are separate records.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-engineering-design","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-cable-trench","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-cable-trench","illustration":"https://eloragrid.ai/library/illustrations/ga-cable-trench.svg"},{"slug":"ga-cable-pit","name":"Cable pit","kind":"object","abbreviation":"GA","aliases":["cable pull pit","Cable pit CAD","Cable pit general arrangement","Cable pit panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A cable pit provides an access or pulling location along an underground route.","description":["A cable pit provides an access or pulling location along an underground route.","Show cover opening, conduit entry elevations and the cable pulling path. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show cover opening, conduit entry elevations and the cable pulling path.","Pit size and cable bend requirements must be selected for the actual cable system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show cover opening, conduit entry elevations and the cable pulling path.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Pit size and cable bend requirements must be selected for the actual cable system.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-engineering-design","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-cable-pit","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-cable-pit","illustration":"https://eloragrid.ai/library/illustrations/ga-cable-pit.svg"},{"slug":"ga-cable-duct-bank","name":"Cable duct bank","kind":"object","abbreviation":"GA","aliases":["underground conduit bank","Cable duct bank CAD","Cable duct bank general arrangement","Cable duct bank panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A duct bank groups underground cable conduits in a documented civil arrangement.","description":["A duct bank groups underground cable conduits in a documented civil arrangement.","Cross-reference conduit positions, route levels and access pits. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Cross-reference conduit positions, route levels and access pits.","The duct-bank GA does not replace individual cable and conduit schedules."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Cross-reference conduit positions, route levels and access pits.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The duct-bank GA does not replace individual cable and conduit schedules.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-engineering-design","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-cable-duct-bank","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-cable-duct-bank","illustration":"https://eloragrid.ai/library/illustrations/ga-cable-duct-bank.svg"},{"slug":"ga-earth-bar","name":"Earth bar","kind":"object","abbreviation":"GA","aliases":["grounding busbar PE bar","Earth bar CAD","Earth bar general arrangement","Earth bar panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An earth bar provides a designated earthing connection point for multiple conductors.","description":["An earth bar provides a designated earthing connection point for multiple conductors.","Reserve lug spacing, fixing points and inspection access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve lug spacing, fixing points and inspection access.","Its length and hole pattern depend on the specified conductor and connection arrangement."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve lug spacing, fixing points and inspection access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its length and hole pattern depend on the specified conductor and connection arrangement.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-earth-bar","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-earth-bar","illustration":"https://eloragrid.ai/library/illustrations/ga-earth-bar.svg"},{"slug":"ga-neutral-bar","name":"Neutral bar","kind":"object","abbreviation":"GA","aliases":["neutral busbar N bar","Neutral bar CAD","Neutral bar general arrangement","Neutral bar panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A neutral bar groups specified neutral connections within an assembly.","description":["A neutral bar groups specified neutral connections within an assembly.","Identify insulation, bonding arrangement and conductor entries. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Identify insulation, bonding arrangement and conductor entries.","Neutral and protective-earth bars must be distinguished by the documented system arrangement."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Identify insulation, bonding arrangement and conductor entries.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Neutral and protective-earth bars must be distinguished by the documented system arrangement.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-engineering-design","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["terminal-strip","control-cabinet"],"artwork":"edu-object-ga-neutral-bar","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-neutral-bar","illustration":"https://eloragrid.ai/library/illustrations/ga-neutral-bar.svg"},{"slug":"ga-flexible-busbar-connection","name":"Flexible busbar connection","kind":"object","abbreviation":"GA","aliases":["laminated copper link","Flexible busbar connection CAD","Flexible busbar connection general arrangement","Flexible busbar connection panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A flexible busbar connection joins selected conductors or equipment terminals.","description":["A flexible busbar connection joins selected conductors or equipment terminals.","Coordinate bend shape, insulation, terminal spacing and fastening access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate bend shape, insulation, terminal spacing and fastening access.","A flexible link is not a universal substitute for a verified rigid busbar arrangement."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate bend shape, insulation, terminal spacing and fastening access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A flexible link is not a universal substitute for a verified rigid busbar arrangement.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"busbar-trunking","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-flexible-busbar-connection","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-flexible-busbar-connection","illustration":"https://eloragrid.ai/library/illustrations/ga-flexible-busbar-connection.svg"},{"slug":"ga-rigid-busbar-assembly","name":"Rigid busbar assembly","kind":"object","abbreviation":"GA","aliases":["copper busbar system","Rigid busbar assembly CAD","Rigid busbar assembly general arrangement","Rigid busbar assembly panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A busbar assembly carries power through a defined set of conductors and supports.","description":["A busbar assembly carries power through a defined set of conductors and supports.","Show phase order, supports, joint access and barriers in the assembly drawings. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show phase order, supports, joint access and barriers in the assembly drawings.","Conductor cross-section alone does not establish assembly rating or short-circuit performance."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show phase order, supports, joint access and barriers in the assembly drawings.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Conductor cross-section alone does not establish assembly rating or short-circuit performance.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"busbar-trunking","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-rigid-busbar-assembly","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-rigid-busbar-assembly","illustration":"https://eloragrid.ai/library/illustrations/ga-rigid-busbar-assembly.svg"},{"slug":"ga-busbar-support-insulator","name":"Busbar support insulator","kind":"object","abbreviation":"GA","aliases":["busbar standoff","Busbar support insulator CAD","Busbar support insulator general arrangement","Busbar support insulator panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A support insulator locates and separates busbar conductors within an assembly.","description":["A support insulator locates and separates busbar conductors within an assembly.","Coordinate conductor fixing interfaces, support positions and barrier clearances. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate conductor fixing interfaces, support positions and barrier clearances.","Electrical and mechanical suitability depend on the complete verified assembly."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate conductor fixing interfaces, support positions and barrier clearances.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Electrical and mechanical suitability depend on the complete verified assembly.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"busbar-trunking","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-busbar-support-insulator","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-busbar-support-insulator","illustration":"https://eloragrid.ai/library/illustrations/ga-busbar-support-insulator.svg"},{"slug":"ga-busway-tap-off-unit","name":"Busway tap-off unit","kind":"object","abbreviation":"GA","aliases":["busbar trunking tap box","Busway tap-off unit CAD","Busway tap-off unit general arrangement","Busway tap-off unit panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A tap-off unit connects an outgoing circuit to the selected busbar trunking system.","description":["A tap-off unit connects an outgoing circuit to the selected busbar trunking system.","Reserve insertion, removal and operating access around the tap point. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve insertion, removal and operating access around the tap point.","A tap-off enclosure must match the specified busway system and orientation."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve insertion, removal and operating access around the tap point.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A tap-off enclosure must match the specified busway system and orientation.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"busbar-trunking","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-busway-tap-off-unit","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-busway-tap-off-unit","illustration":"https://eloragrid.ai/library/illustrations/ga-busway-tap-off-unit.svg"},{"slug":"ga-lv-incomer-compartment","name":"LV incomer compartment","kind":"object","abbreviation":"GA","aliases":["main breaker bay","LV incomer compartment CAD","LV incomer compartment general arrangement","LV incomer compartment panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An incomer compartment contains the incoming switching and connection equipment of an assembly.","description":["An incomer compartment contains the incoming switching and connection equipment of an assembly.","Show the source entry, breaker controls, metering and cable/bus interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show the source entry, breaker controls, metering and cable/bus interfaces.","The functional incomer label does not prescribe whether access is front, rear or both."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show the source entry, breaker controls, metering and cable/bus interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The functional incomer label does not prescribe whether access is front, rear or both.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-eaton-fundamentals","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-lv-incomer-compartment","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-lv-incomer-compartment","illustration":"https://eloragrid.ai/library/illustrations/ga-lv-incomer-compartment.svg"},{"slug":"ga-lv-feeder-compartment","name":"LV feeder compartment","kind":"object","abbreviation":"GA","aliases":["outgoing feeder bay","LV feeder compartment CAD","LV feeder compartment general arrangement","LV feeder compartment panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A feeder compartment houses the specified outgoing circuit equipment.","description":["A feeder compartment houses the specified outgoing circuit equipment.","Coordinate device handles, cable terminals and internal separation interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate device handles, cable terminals and internal separation interfaces.","A feeder function can be implemented with different protective and switching devices."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate device handles, cable terminals and internal separation interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A feeder function can be implemented with different protective and switching devices.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-eaton-fundamentals","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-lv-feeder-compartment","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-lv-feeder-compartment","illustration":"https://eloragrid.ai/library/illustrations/ga-lv-feeder-compartment.svg"},{"slug":"ga-bus-coupler-compartment","name":"Bus-coupler compartment","kind":"object","abbreviation":"GA","aliases":["bus tie bay","Bus-coupler compartment CAD","Bus-coupler compartment general arrangement","Bus-coupler compartment panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A bus-coupler compartment contains the specified switching connection between bus sections.","description":["A bus-coupler compartment contains the specified switching connection between bus sections.","Show operating controls, bus connections and interlock references. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show operating controls, bus connections and interlock references.","A bus tie is a circuit function; its physical bay depends on the assembly configuration."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show operating controls, bus connections and interlock references.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A bus tie is a circuit function; its physical bay depends on the assembly configuration.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-eaton-fundamentals","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-bus-coupler-compartment","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-bus-coupler-compartment","illustration":"https://eloragrid.ai/library/illustrations/ga-bus-coupler-compartment.svg"},{"slug":"ga-cable-termination-compartment","name":"Cable termination compartment","kind":"object","abbreviation":"GA","aliases":["cable chamber","Cable termination compartment CAD","Cable termination compartment general arrangement","Cable termination compartment panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A cable compartment contains the documented field-cable termination zone.","description":["A cable compartment contains the documented field-cable termination zone.","Reserve lug access, cable bends and removal of covers or barriers. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve lug access, cable bends and removal of covers or barriers.","The terminal zone must be coordinated with actual cable size and entry direction."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve lug access, cable bends and removal of covers or barriers.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The terminal zone must be coordinated with actual cable size and entry direction.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-eaton-fundamentals","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-cable-termination-compartment","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-cable-termination-compartment","illustration":"https://eloragrid.ai/library/illustrations/ga-cable-termination-compartment.svg"},{"slug":"ga-busbar-compartment","name":"Busbar compartment","kind":"object","abbreviation":"GA","aliases":["main bus chamber","Busbar compartment CAD","Busbar compartment general arrangement","Busbar compartment panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A busbar compartment houses the assembly's main bus conductors and their supports.","description":["A busbar compartment houses the assembly's main bus conductors and their supports.","Coordinate inspection access and the assembly's separation boundaries. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate inspection access and the assembly's separation boundaries.","An external cabinet outline does not reveal internal bus compartment geometry."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate inspection access and the assembly's separation boundaries.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An external cabinet outline does not reveal internal bus compartment geometry.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-eaton-fundamentals","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-busbar-compartment","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-busbar-compartment","illustration":"https://eloragrid.ai/library/illustrations/ga-busbar-compartment.svg"},{"slug":"ga-metering-compartment","name":"Metering compartment","kind":"object","abbreviation":"GA","aliases":["instrument chamber","Metering compartment CAD","Metering compartment general arrangement","Metering compartment panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A metering compartment groups specified measurement devices and associated wiring.","description":["A metering compartment groups specified measurement devices and associated wiring.","Coordinate door-mounted instruments, CT/VT interfaces and test access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate door-mounted instruments, CT/VT interfaces and test access.","Metering may share an enclosure with other equipment or use a separate compartment."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate door-mounted instruments, CT/VT interfaces and test access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Metering may share an enclosure with other equipment or use a separate compartment.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-eaton-fundamentals","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-metering-compartment","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-metering-compartment","illustration":"https://eloragrid.ai/library/illustrations/ga-metering-compartment.svg"},{"slug":"ga-motor-control-centre-lineup","name":"Motor control centre lineup","kind":"object","abbreviation":"GA","aliases":["MCC lineup","Motor control centre lineup CAD","Motor control centre lineup general arrangement","Motor control centre lineup panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A motor control centre groups motor feeder equipment into an assembly.","description":["A motor control centre groups motor feeder equipment into an assembly.","Show complete sections, field terminal zones and the selected unit arrangement. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show complete sections, field terminal zones and the selected unit arrangement.","A motor control centre and a general distribution switchboard have different functional schedules."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show complete sections, field terminal zones and the selected unit arrangement.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A motor control centre and a general distribution switchboard have different functional schedules.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-count-abb-lv","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-motor-control-centre-lineup","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-motor-control-centre-lineup","illustration":"https://eloragrid.ai/library/illustrations/ga-motor-control-centre-lineup.svg"},{"slug":"ga-withdrawable-motor-feeder-unit","name":"Withdrawable motor feeder unit","kind":"object","abbreviation":"GA","aliases":["MCC bucket drawer","Withdrawable motor feeder unit CAD","Withdrawable motor feeder unit general arrangement","Withdrawable motor feeder unit panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A withdrawable feeder unit packages the specified motor feeder equipment in a removable assembly.","description":["A withdrawable feeder unit packages the specified motor feeder equipment in a removable assembly.","Reserve withdrawal travel, operating positions and handling access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve withdrawal travel, operating positions and handling access.","The closed unit boundary excludes the space needed for removal."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve withdrawal travel, operating positions and handling access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The closed unit boundary excludes the space needed for removal.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-count-abb-lv","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-withdrawable-motor-feeder-unit","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-withdrawable-motor-feeder-unit","illustration":"https://eloragrid.ai/library/illustrations/ga-withdrawable-motor-feeder-unit.svg"},{"slug":"ga-mv-vacuum-circuit-breaker-truck","name":"MV vacuum circuit-breaker truck","kind":"object","abbreviation":"GA","aliases":["withdrawable VCB carriage","MV vacuum circuit-breaker truck CAD","MV vacuum circuit-breaker truck general arrangement","MV vacuum circuit-breaker truck panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A vacuum-breaker truck carries the selected medium-voltage breaker and connection mechanism.","description":["A vacuum-breaker truck carries the selected medium-voltage breaker and connection mechanism.","Show insertion/removal route and compartment interfaces from project documentation. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show insertion/removal route and compartment interfaces from project documentation.","The truck is an assembly-specific item; a generic drawing is not an interchangeable carriage."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show insertion/removal route and compartment interfaces from project documentation.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The truck is an assembly-specific item; a generic drawing is not an interchangeable carriage.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-abb-unigear","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-mv-vacuum-circuit-breaker-truck","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-mv-vacuum-circuit-breaker-truck","illustration":"https://eloragrid.ai/library/illustrations/ga-mv-vacuum-circuit-breaker-truck.svg"},{"slug":"ga-switchgear-arc-exhaust-plenum","name":"Switchgear arc exhaust plenum","kind":"object","abbreviation":"GA","aliases":["arc duct pressure relief chamber","Switchgear arc exhaust plenum CAD","Switchgear arc exhaust plenum general arrangement","Switchgear arc exhaust plenum panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An exhaust plenum forms part of a specified switchgear pressure-relief arrangement.","description":["An exhaust plenum forms part of a specified switchgear pressure-relief arrangement.","Coordinate duct path, outlet zone and interfaces with the building. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate duct path, outlet zone and interfaces with the building.","A ventilation duct cannot be assumed to fulfil an arc-exhaust function."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate duct path, outlet zone and interfaces with the building.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A ventilation duct cannot be assumed to fulfil an arc-exhaust function.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-abb-unigear","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-switchgear-arc-exhaust-plenum","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-switchgear-arc-exhaust-plenum","illustration":"https://eloragrid.ai/library/illustrations/ga-switchgear-arc-exhaust-plenum.svg"},{"slug":"ga-protection-relay-panel","name":"Protection relay panel","kind":"object","abbreviation":"GA","aliases":["relay cubicle","Protection relay panel CAD","Protection relay panel general arrangement","Protection relay panel panel layout"],"category":"measurement-protection","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A relay panel houses protection, control, test and terminal equipment for defined circuits.","description":["A relay panel houses protection, control, test and terminal equipment for defined circuits.","Coordinate door apertures, rear wiring depth and test-terminal access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate door apertures, rear wiring depth and test-terminal access.","The panel arrangement does not establish which protection functions or settings are applied."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate door apertures, rear wiring depth and test-terminal access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The panel arrangement does not establish which protection functions or settings are applied.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-micom-cad","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-object-ga-protection-relay-panel","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-protection-relay-panel","illustration":"https://eloragrid.ai/library/illustrations/ga-protection-relay-panel.svg"},{"slug":"ga-panel-power-meter","name":"Panel power meter","kind":"object","abbreviation":"GA","aliases":["multifunction energy meter","Panel power meter CAD","Panel power meter general arrangement","Panel power meter panel layout"],"category":"measurement-protection","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A panel power meter measures the specified electrical quantities through its input interfaces.","description":["A panel power meter measures the specified electrical quantities through its input interfaces.","Show front cut-out, rear terminals and communication cable routes. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show front cut-out, rear terminals and communication cable routes.","A direct-connected meter and a CT-connected meter need different wiring details."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show front cut-out, rear terminals and communication cable routes.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A direct-connected meter and a CT-connected meter need different wiring details.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-object-ga-panel-power-meter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-panel-power-meter","illustration":"https://eloragrid.ai/library/illustrations/ga-panel-power-meter.svg"},{"slug":"ga-energy-submeter","name":"Energy submeter","kind":"object","abbreviation":"GA","aliases":["DIN rail kWh meter","Energy submeter CAD","Energy submeter general arrangement","Energy submeter panel layout"],"category":"measurement-protection","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An energy submeter measures consumption for a specified circuit or group of loads.","description":["An energy submeter measures consumption for a specified circuit or group of loads.","Coordinate direct or instrument-transformer connections and reading access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate direct or instrument-transformer connections and reading access.","Measurement class and billing suitability must be checked in the actual product documentation."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate direct or instrument-transformer connections and reading access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Measurement class and billing suitability must be checked in the actual product documentation.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-object-ga-energy-submeter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-energy-submeter","illustration":"https://eloragrid.ai/library/illustrations/ga-energy-submeter.svg"},{"slug":"ga-window-current-transformer","name":"Window current transformer","kind":"object","abbreviation":"GA","aliases":["ring CT physical object","Window current transformer CAD","Window current transformer general arrangement","Window current transformer panel layout"],"category":"measurement-protection","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A window CT surrounds a conductor or busbar to provide the specified current measurement.","description":["A window CT surrounds a conductor or busbar to provide the specified current measurement.","Coordinate aperture, primary conductor position and secondary terminal access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate aperture, primary conductor position and secondary terminal access.","Aperture fit does not establish ratio, class or protection suitability."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate aperture, primary conductor position and secondary terminal access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Aperture fit does not establish ratio, class or protection suitability.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"instrument-transformers","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-object-ga-window-current-transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-window-current-transformer","illustration":"https://eloragrid.ai/library/illustrations/ga-window-current-transformer.svg"},{"slug":"ga-split-core-current-transformer","name":"Split-core current transformer","kind":"object","abbreviation":"GA","aliases":["retrofit CT physical object","Split-core current transformer CAD","Split-core current transformer general arrangement","Split-core current transformer panel layout"],"category":"measurement-protection","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A split-core CT can be assembled around the specified existing conductor.","description":["A split-core CT can be assembled around the specified existing conductor.","Allow opening travel, fastening access and secondary routing. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Allow opening travel, fastening access and secondary routing.","A split core is a construction feature, not a complete accuracy specification."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Allow opening travel, fastening access and secondary routing.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A split core is a construction feature, not a complete accuracy specification.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"instrument-transformers","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-object-ga-split-core-current-transformer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-split-core-current-transformer","illustration":"https://eloragrid.ai/library/illustrations/ga-split-core-current-transformer.svg"},{"slug":"ga-voltage-transformer-assembly","name":"Voltage transformer assembly","kind":"object","abbreviation":"VT","aliases":["VT PT physical object","Voltage transformer assembly CAD","Voltage transformer assembly general arrangement","Voltage transformer assembly panel layout"],"category":"measurement-protection","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A voltage-transformer assembly provides the specified voltage measurement interface.","description":["A voltage-transformer assembly provides the specified voltage measurement interface.","Coordinate primary connections, secondary terminals and selected fuses or disconnect arrangements. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate primary connections, secondary terminals and selected fuses or disconnect arrangements.","Physical VT layout must be checked against the exact winding and connection design."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate primary connections, secondary terminals and selected fuses or disconnect arrangements.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Physical VT layout must be checked against the exact winding and connection design.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"instrument-transformers","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-object-ga-voltage-transformer-assembly","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-voltage-transformer-assembly","illustration":"https://eloragrid.ai/library/illustrations/ga-voltage-transformer-assembly.svg"},{"slug":"ga-wall-mounted-junction-enclosure","name":"Wall-mounted junction enclosure","kind":"object","abbreviation":"GA","aliases":["junction box","Wall-mounted junction enclosure CAD","Wall-mounted junction enclosure general arrangement","Wall-mounted junction enclosure panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A junction enclosure houses the specified wiring connections at a field location.","description":["A junction enclosure houses the specified wiring connections at a field location.","Show door or cover opening, cable entries and fixing interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show door or cover opening, cable entries and fixing interfaces.","Enclosure outside size differs from usable internal mounting space."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show door or cover opening, cable entries and fixing interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Enclosure outside size differs from usable internal mounting space.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"enclosures","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-wall-mounted-junction-enclosure","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-wall-mounted-junction-enclosure","illustration":"https://eloragrid.ai/library/illustrations/ga-wall-mounted-junction-enclosure.svg"},{"slug":"ga-floor-standing-enclosure","name":"Floor-standing enclosure","kind":"object","abbreviation":"GA","aliases":["free standing cabinet","Floor-standing enclosure CAD","Floor-standing enclosure general arrangement","Floor-standing enclosure panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A floor-standing enclosure provides a physical housing for an electrical assembly.","description":["A floor-standing enclosure provides a physical housing for an electrical assembly.","Coordinate base fixing, doors, cable entries and internal mounting surfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate base fixing, doors, cable entries and internal mounting surfaces.","An enclosure is not automatically a verified switchboard assembly."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate base fixing, doors, cable entries and internal mounting surfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An enclosure is not automatically a verified switchboard assembly.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-count-abb-lv","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-floor-standing-enclosure","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-floor-standing-enclosure","illustration":"https://eloragrid.ai/library/illustrations/ga-floor-standing-enclosure.svg"},{"slug":"ga-enclosure-plinth","name":"Enclosure plinth","kind":"object","abbreviation":"GA","aliases":["cabinet base pedestal","Enclosure plinth CAD","Enclosure plinth general arrangement","Enclosure plinth panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A plinth supports a cabinet and provides the selected base or cable-entry arrangement.","description":["A plinth supports a cabinet and provides the selected base or cable-entry arrangement.","Show plinth panels, fixing access and the relationship to finished floor level. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show plinth panels, fixing access and the relationship to finished floor level.","Base height is an assembly choice and cannot be taken from this generic preview."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show plinth panels, fixing access and the relationship to finished floor level.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Base height is an assembly choice and cannot be taken from this generic preview.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"enclosures","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-enclosure-plinth","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-enclosure-plinth","illustration":"https://eloragrid.ai/library/illustrations/ga-enclosure-plinth.svg"},{"slug":"ga-enclosure-gland-plate","name":"Enclosure gland plate","kind":"object","abbreviation":"GA","aliases":["removable cable-entry plate","Enclosure gland plate CAD","Enclosure gland plate general arrangement","Enclosure gland plate panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A gland plate provides a defined removable surface for cable entries.","description":["A gland plate provides a defined removable surface for cable entries.","Coordinate cable penetrations, fixing access and sealing interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate cable penetrations, fixing access and sealing interfaces.","The plate boundary does not prescribe hole sizes or gland types."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate cable penetrations, fixing access and sealing interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The plate boundary does not prescribe hole sizes or gland types.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"enclosures","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-enclosure-gland-plate","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-enclosure-gland-plate","illustration":"https://eloragrid.ai/library/illustrations/ga-enclosure-gland-plate.svg"},{"slug":"ga-enclosure-door-swing-envelope","name":"Enclosure door swing envelope","kind":"object","abbreviation":"GA","aliases":["cabinet opening zone","Enclosure door swing envelope CAD","Enclosure door swing envelope general arrangement","Enclosure door swing envelope panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A door-swing envelope represents the space occupied by an opening cabinet door.","description":["A door-swing envelope represents the space occupied by an opening cabinet door.","Reference actual hinge side, door width, opening angle and adjacent equipment. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reference actual hinge side, door width, opening angle and adjacent equipment.","This is a planning annotation, not a statutory clearance dimension."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reference actual hinge side, door width, opening angle and adjacent equipment.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"This is a planning annotation, not a statutory clearance dimension.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-engineering-design","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-enclosure-door-swing-envelope","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-enclosure-door-swing-envelope","illustration":"https://eloragrid.ai/library/illustrations/ga-enclosure-door-swing-envelope.svg"},{"slug":"ga-equipment-maintenance-envelope","name":"Equipment maintenance envelope","kind":"object","abbreviation":"GA","aliases":["service access zone","Equipment maintenance envelope CAD","Equipment maintenance envelope general arrangement","Equipment maintenance envelope panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A maintenance envelope represents the selected space needed for servicing an item.","description":["A maintenance envelope represents the selected space needed for servicing an item.","Cross-reference manufacturer tasks, removable parts and access direction. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Cross-reference manufacturer tasks, removable parts and access direction.","An illustrative boundary does not establish the legally required working space."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Cross-reference manufacturer tasks, removable parts and access direction.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An illustrative boundary does not establish the legally required working space.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-engineering-design","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-equipment-maintenance-envelope","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-equipment-maintenance-envelope","illustration":"https://eloragrid.ai/library/illustrations/ga-equipment-maintenance-envelope.svg"},{"slug":"ga-equipment-removal-route","name":"Equipment removal route","kind":"object","abbreviation":"GA","aliases":["replacement path","Equipment removal route CAD","Equipment removal route general arrangement","Equipment removal route panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A removal route identifies the documented path for replacing major equipment.","description":["A removal route identifies the documented path for replacing major equipment.","Coordinate door openings, turning areas, lifting methods and floor capacity references. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate door openings, turning areas, lifting methods and floor capacity references.","A route centreline alone does not prove that an assembled item will fit through every opening."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate door openings, turning areas, lifting methods and floor capacity references.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A route centreline alone does not prove that an assembled item will fit through every opening.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-engineering-design","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-equipment-removal-route","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-equipment-removal-route","illustration":"https://eloragrid.ai/library/illustrations/ga-equipment-removal-route.svg"},{"slug":"ga-switchroom-egress-path","name":"Switchroom egress path","kind":"object","abbreviation":"GA","aliases":["escape route access aisle","Switchroom egress path CAD","Switchroom egress path general arrangement","Switchroom egress path panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An egress path records a planned route through the room to the designated exits.","description":["An egress path records a planned route through the room to the designated exits.","Coordinate door operation and access obstructions with the applicable building design. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate door operation and access obstructions with the applicable building design.","The GA annotation must reference the project's applicable egress requirements; no universal width is supplied."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate door operation and access obstructions with the applicable building design.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The GA annotation must reference the project's applicable egress requirements; no universal width is supplied.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-engineering-design","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-switchroom-egress-path","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-switchroom-egress-path","illustration":"https://eloragrid.ai/library/illustrations/ga-switchroom-egress-path.svg"},{"slug":"ga-enclosure-anti-condensation-heater","name":"Enclosure anti-condensation heater","kind":"object","abbreviation":"GA","aliases":["panel space heater","Enclosure anti-condensation heater CAD","Enclosure anti-condensation heater general arrangement","Enclosure anti-condensation heater panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A cabinet heater provides the specified enclosure heating arrangement.","description":["A cabinet heater provides the specified enclosure heating arrangement.","Coordinate mounting, clear zones and supply/control wiring. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate mounting, clear zones and supply/control wiring.","Heating control and environmental design depend on the selected equipment and site conditions."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate mounting, clear zones and supply/control wiring.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Heating control and environmental design depend on the selected equipment and site conditions.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-enclosure-anti-condensation-heater","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-enclosure-anti-condensation-heater","illustration":"https://eloragrid.ai/library/illustrations/ga-enclosure-anti-condensation-heater.svg"},{"slug":"ga-enclosure-thermostat","name":"Enclosure thermostat","kind":"object","abbreviation":"GA","aliases":["cabinet temperature switch","Enclosure thermostat CAD","Enclosure thermostat general arrangement","Enclosure thermostat panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A thermostat controls the specified heating or cooling circuit according to its setting.","description":["A thermostat controls the specified heating or cooling circuit according to its setting.","Place it where sensing and terminal access suit the documented arrangement. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Place it where sensing and terminal access suit the documented arrangement.","A thermostat position should not be chosen solely for convenient wiring."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Place it where sensing and terminal access suit the documented arrangement.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A thermostat position should not be chosen solely for convenient wiring.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-enclosure-thermostat","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-enclosure-thermostat","illustration":"https://eloragrid.ai/library/illustrations/ga-enclosure-thermostat.svg"},{"slug":"ga-enclosure-hygrostat","name":"Enclosure hygrostat","kind":"object","abbreviation":"GA","aliases":["humidity switch","Enclosure hygrostat CAD","Enclosure hygrostat general arrangement","Enclosure hygrostat panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A hygrostat operates the specified control circuit according to humidity conditions.","description":["A hygrostat operates the specified control circuit according to humidity conditions.","Coordinate sensing location, cable routing and setting access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate sensing location, cable routing and setting access.","Humidity control and temperature control address different environmental inputs."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate sensing location, cable routing and setting access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Humidity control and temperature control address different environmental inputs.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-enclosure-hygrostat","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-enclosure-hygrostat","illustration":"https://eloragrid.ai/library/illustrations/ga-enclosure-hygrostat.svg"},{"slug":"ga-enclosure-filter-fan","name":"Enclosure filter fan","kind":"object","abbreviation":"GA","aliases":["panel ventilation fan","Enclosure filter fan CAD","Enclosure filter fan general arrangement","Enclosure filter fan panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A filter fan moves air through the specified cabinet ventilation arrangement.","description":["A filter fan moves air through the specified cabinet ventilation arrangement.","Show inlet/outlet direction, cut-out, filter replacement and internal obstructions. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show inlet/outlet direction, cut-out, filter replacement and internal obstructions.","A fan cut-out is not a thermal performance calculation."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show inlet/outlet direction, cut-out, filter replacement and internal obstructions.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fan cut-out is not a thermal performance calculation.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-enclosure-filter-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-enclosure-filter-fan","illustration":"https://eloragrid.ai/library/illustrations/ga-enclosure-filter-fan.svg"},{"slug":"ga-enclosure-air-conditioner","name":"Enclosure air conditioner","kind":"object","abbreviation":"GA","aliases":["cabinet cooling unit","Enclosure air conditioner CAD","Enclosure air conditioner general arrangement","Enclosure air conditioner panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An enclosure cooling unit provides the selected cabinet thermal-control function.","description":["An enclosure cooling unit provides the selected cabinet thermal-control function.","Reserve its mounting cut-out, service access, airflow and condensate interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve its mounting cut-out, service access, airflow and condensate interfaces.","The cooling-unit envelope and its required external airflow zone are distinct."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve its mounting cut-out, service access, airflow and condensate interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The cooling-unit envelope and its required external airflow zone are distinct.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-enclosure-air-conditioner","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-enclosure-air-conditioner","illustration":"https://eloragrid.ai/library/illustrations/ga-enclosure-air-conditioner.svg"},{"slug":"ga-enclosure-air-to-air-heat-exchanger","name":"Enclosure air-to-air heat exchanger","kind":"object","abbreviation":"GA","aliases":["panel heat exchanger","Enclosure air-to-air heat exchanger CAD","Enclosure air-to-air heat exchanger general arrangement","Enclosure air-to-air heat exchanger panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A heat exchanger transfers heat across the specified cabinet/environment boundary.","description":["A heat exchanger transfers heat across the specified cabinet/environment boundary.","Coordinate both air paths, mounting and service access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate both air paths, mounting and service access.","Its cooling behaviour differs from a refrigeration air conditioner."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate both air paths, mounting and service access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its cooling behaviour differs from a refrigeration air conditioner.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-enclosure-air-to-air-heat-exchanger","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-enclosure-air-to-air-heat-exchanger","illustration":"https://eloragrid.ai/library/illustrations/ga-enclosure-air-to-air-heat-exchanger.svg"},{"slug":"ga-switchroom-supply-fan","name":"Switchroom supply fan","kind":"object","abbreviation":"GA","aliases":["room ventilation inlet fan","Switchroom supply fan CAD","Switchroom supply fan general arrangement","Switchroom supply fan panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A supply fan delivers the selected incoming airflow to a room ventilation system.","description":["A supply fan delivers the selected incoming airflow to a room ventilation system.","Show intake route, service access and electrical/control interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show intake route, service access and electrical/control interfaces.","Room heat removal requires the complete airflow design, not a fan outline alone."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show intake route, service access and electrical/control interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Room heat removal requires the complete airflow design, not a fan outline alone.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-greenheck-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-switchroom-supply-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-switchroom-supply-fan","illustration":"https://eloragrid.ai/library/illustrations/ga-switchroom-supply-fan.svg"},{"slug":"ga-switchroom-exhaust-fan","name":"Switchroom exhaust fan","kind":"object","abbreviation":"GA","aliases":["room extraction fan","Switchroom exhaust fan CAD","Switchroom exhaust fan general arrangement","Switchroom exhaust fan panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An exhaust fan removes air along the documented room ventilation route.","description":["An exhaust fan removes air along the documented room ventilation route.","Coordinate discharge position, make-up air and service access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate discharge position, make-up air and service access.","A room exhaust fan and an engine exhaust system serve different flows."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate discharge position, make-up air and service access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A room exhaust fan and an engine exhaust system serve different flows.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-greenheck-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-switchroom-exhaust-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-switchroom-exhaust-fan","illustration":"https://eloragrid.ai/library/illustrations/ga-switchroom-exhaust-fan.svg"},{"slug":"ga-ventilation-intake-louver","name":"Ventilation intake louver","kind":"object","abbreviation":"GA","aliases":["weather louvre","Ventilation intake louver CAD","Ventilation intake louver general arrangement","Ventilation intake louver panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An intake louver forms a selected air-entry interface in a wall or enclosure.","description":["An intake louver forms a selected air-entry interface in a wall or enclosure.","Coordinate free-air path, mounting, drainage and surrounding obstructions. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate free-air path, mounting, drainage and surrounding obstructions.","Overall opening area does not equal the louver's effective free area."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate free-air path, mounting, drainage and surrounding obstructions.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Overall opening area does not equal the louver's effective free area.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-greenheck-aircontrol","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-ventilation-intake-louver","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-ventilation-intake-louver","illustration":"https://eloragrid.ai/library/illustrations/ga-ventilation-intake-louver.svg"},{"slug":"ga-motorised-ventilation-damper","name":"Motorised ventilation damper","kind":"object","abbreviation":"GA","aliases":["actuated airflow damper","Motorised ventilation damper CAD","Motorised ventilation damper general arrangement","Motorised ventilation damper panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An actuated damper controls the selected airflow path.","description":["An actuated damper controls the selected airflow path.","Show actuator clearance, linkage access and control cable interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show actuator clearance, linkage access and control cable interfaces.","A control damper is not automatically a fire or smoke damper."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show actuator clearance, linkage access and control cable interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A control damper is not automatically a fire or smoke damper.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-greenheck-aircontrol","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-motorised-ventilation-damper","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-motorised-ventilation-damper","illustration":"https://eloragrid.ai/library/illustrations/ga-motorised-ventilation-damper.svg"},{"slug":"ga-backdraft-damper","name":"Backdraft damper","kind":"object","abbreviation":"GA","aliases":["nonreturn air damper","Backdraft damper CAD","Backdraft damper general arrangement","Backdraft damper panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A backdraft damper controls reverse airflow through the specified opening.","description":["A backdraft damper controls reverse airflow through the specified opening.","Coordinate orientation, access and blade-operating zone. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate orientation, access and blade-operating zone.","Gravity or pressure operation must suit the actual installation arrangement."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate orientation, access and blade-operating zone.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Gravity or pressure operation must suit the actual installation arrangement.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-greenheck-aircontrol","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-backdraft-damper","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-backdraft-damper","illustration":"https://eloragrid.ai/library/illustrations/ga-backdraft-damper.svg"},{"slug":"ga-fire-damper","name":"Fire damper","kind":"object","abbreviation":"GA","aliases":["fire-rated duct closure","Fire damper CAD","Fire damper general arrangement","Fire damper panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A fire damper forms part of the documented fire-resistance arrangement at an air passage.","description":["A fire damper forms part of the documented fire-resistance arrangement at an air passage.","Coordinate the selected tested installation detail and inspection access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate the selected tested installation detail and inspection access.","A generic damper icon does not demonstrate a compliant fire-rated penetration."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate the selected tested installation detail and inspection access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A generic damper icon does not demonstrate a compliant fire-rated penetration.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-greenheck-aircontrol","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-fire-damper","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-fire-damper","illustration":"https://eloragrid.ai/library/illustrations/ga-fire-damper.svg"},{"slug":"ga-smoke-control-damper","name":"Smoke-control damper","kind":"object","abbreviation":"GA","aliases":["smoke damper","Smoke-control damper CAD","Smoke-control damper general arrangement","Smoke-control damper panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A smoke damper controls the specified smoke-related airflow boundary.","description":["A smoke damper controls the specified smoke-related airflow boundary.","Show actuator, access panel and the documented fire-control interface. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show actuator, access panel and the documented fire-control interface.","Smoke and fire performance classifications must be verified for the selected device and installation."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show actuator, access panel and the documented fire-control interface.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Smoke and fire performance classifications must be verified for the selected device and installation.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-greenheck-aircontrol","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-smoke-control-damper","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-smoke-control-damper","illustration":"https://eloragrid.ai/library/illustrations/ga-smoke-control-damper.svg"},{"slug":"ga-generator-day-tank","name":"Generator day tank","kind":"object","abbreviation":"GA","aliases":["fuel service tank","Generator day tank CAD","Generator day tank general arrangement","Generator day tank panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A day tank provides the selected local fuel supply arrangement for a generator.","description":["A day tank provides the selected local fuel supply arrangement for a generator.","Coordinate tank envelope, fuel lines, level controls and servicing access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate tank envelope, fuel lines, level controls and servicing access.","A day tank and a bulk storage tank have different system roles."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate tank envelope, fuel lines, level controls and servicing access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A day tank and a bulk storage tank have different system roles.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-cummins-application","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-generator-day-tank","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-generator-day-tank","illustration":"https://eloragrid.ai/library/illustrations/ga-generator-day-tank.svg"},{"slug":"ga-generator-bulk-fuel-tank","name":"Generator bulk fuel tank","kind":"object","abbreviation":"GA","aliases":["diesel storage tank","Generator bulk fuel tank CAD","Generator bulk fuel tank general arrangement","Generator bulk fuel tank panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A bulk tank stores fuel for the documented generator fuel system.","description":["A bulk tank stores fuel for the documented generator fuel system.","Coordinate fill access, transfer interfaces and the project's containment arrangement. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate fill access, transfer interfaces and the project's containment arrangement.","A storage capacity does not establish an approved tank installation or separation distance."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate fill access, transfer interfaces and the project's containment arrangement.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A storage capacity does not establish an approved tank installation or separation distance.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-cummins-application","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-generator-bulk-fuel-tank","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-generator-bulk-fuel-tank","illustration":"https://eloragrid.ai/library/illustrations/ga-generator-bulk-fuel-tank.svg"},{"slug":"ga-generator-fuel-transfer-pump","name":"Generator fuel transfer pump","kind":"object","abbreviation":"GA","aliases":["day tank supply pump","Generator fuel transfer pump CAD","Generator fuel transfer pump general arrangement","Generator fuel transfer pump panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A transfer pump moves fuel along the documented tank supply arrangement.","description":["A transfer pump moves fuel along the documented tank supply arrangement.","Show pump access, supply/control connections and connected pipe interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show pump access, supply/control connections and connected pipe interfaces.","Fuel transfer control must be coordinated with tank levels and the actual fuel system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show pump access, supply/control connections and connected pipe interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Fuel transfer control must be coordinated with tank levels and the actual fuel system.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-cummins-application","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-generator-fuel-transfer-pump","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-generator-fuel-transfer-pump","illustration":"https://eloragrid.ai/library/illustrations/ga-generator-fuel-transfer-pump.svg"},{"slug":"ga-generator-fuel-bund","name":"Generator fuel bund","kind":"object","abbreviation":"GA","aliases":["secondary fuel containment","Generator fuel bund CAD","Generator fuel bund general arrangement","Generator fuel bund panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A bund provides the selected secondary containment boundary around fuel equipment.","description":["A bund provides the selected secondary containment boundary around fuel equipment.","Coordinate tank placement, penetrations, drainage and inspection access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate tank placement, penetrations, drainage and inspection access.","Containment requirements depend on applicable site rules and stored materials."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate tank placement, penetrations, drainage and inspection access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Containment requirements depend on applicable site rules and stored materials.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-cummins-application","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-generator-fuel-bund","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-generator-fuel-bund","illustration":"https://eloragrid.ai/library/illustrations/ga-generator-fuel-bund.svg"},{"slug":"ga-generator-exhaust-silencer","name":"Generator exhaust silencer","kind":"object","abbreviation":"GA","aliases":["engine muffler","Generator exhaust silencer CAD","Generator exhaust silencer general arrangement","Generator exhaust silencer panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An exhaust silencer is part of the specified engine exhaust path.","description":["An exhaust silencer is part of the specified engine exhaust path.","Show mounting supports, heat exposure, service access and pipe connection positions. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show mounting supports, heat exposure, service access and pipe connection positions.","Silencer envelope and allowable exhaust backpressure are different engineering inputs."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show mounting supports, heat exposure, service access and pipe connection positions.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Silencer envelope and allowable exhaust backpressure are different engineering inputs.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-cummins-application","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-generator-exhaust-silencer","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-generator-exhaust-silencer","illustration":"https://eloragrid.ai/library/illustrations/ga-generator-exhaust-silencer.svg"},{"slug":"ga-generator-exhaust-flexible-connection","name":"Generator exhaust flexible connection","kind":"object","abbreviation":"GA","aliases":["exhaust bellows","Generator exhaust flexible connection CAD","Generator exhaust flexible connection general arrangement","Generator exhaust flexible connection panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A flexible exhaust connection accommodates the specified engine/exhaust interface.","description":["A flexible exhaust connection accommodates the specified engine/exhaust interface.","Coordinate orientation, support points and the selected movement allowance. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate orientation, support points and the selected movement allowance.","A flexible connection does not remove the need to support the downstream exhaust system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate orientation, support points and the selected movement allowance.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A flexible connection does not remove the need to support the downstream exhaust system.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-cummins-application","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-generator-exhaust-flexible-connection","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-generator-exhaust-flexible-connection","illustration":"https://eloragrid.ai/library/illustrations/ga-generator-exhaust-flexible-connection.svg"},{"slug":"ga-generator-exhaust-stack","name":"Generator exhaust stack","kind":"object","abbreviation":"GA","aliases":["engine exhaust discharge","Generator exhaust stack CAD","Generator exhaust stack general arrangement","Generator exhaust stack panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An exhaust stack routes the specified engine exhaust to a documented discharge location.","description":["An exhaust stack routes the specified engine exhaust to a documented discharge location.","Coordinate building penetrations, supports and surrounding air-intake locations. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate building penetrations, supports and surrounding air-intake locations.","A vertical line on a GA does not establish a suitable discharge location."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate building penetrations, supports and surrounding air-intake locations.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A vertical line on a GA does not establish a suitable discharge location.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-cummins-application","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-generator-exhaust-stack","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-generator-exhaust-stack","illustration":"https://eloragrid.ai/library/illustrations/ga-generator-exhaust-stack.svg"},{"slug":"ga-generator-radiator-discharge-duct","name":"Generator radiator discharge duct","kind":"object","abbreviation":"GA","aliases":["cooling air duct","Generator radiator discharge duct CAD","Generator radiator discharge duct general arrangement","Generator radiator discharge duct panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A radiator discharge duct directs the specified cooling airflow away from the generator.","description":["A radiator discharge duct directs the specified cooling airflow away from the generator.","Coordinate duct connection, flexible section and room air-entry route. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate duct connection, flexible section and room air-entry route.","Cooling air and combustion exhaust are separate systems and must remain clearly identified."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate duct connection, flexible section and room air-entry route.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Cooling air and combustion exhaust are separate systems and must remain clearly identified.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-cummins-application","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-generator-radiator-discharge-duct","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-generator-radiator-discharge-duct","illustration":"https://eloragrid.ai/library/illustrations/ga-generator-radiator-discharge-duct.svg"},{"slug":"ga-generator-remote-radiator","name":"Generator remote radiator","kind":"object","abbreviation":"GA","aliases":["remote cooling package","Generator remote radiator CAD","Generator remote radiator general arrangement","Generator remote radiator panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A remote radiator forms part of the selected generator cooling circuit.","description":["A remote radiator forms part of the selected generator cooling circuit.","Show equipment access, airflow directions and coolant pipe interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show equipment access, airflow directions and coolant pipe interfaces.","A remote cooling package requires selected-engine cooling design, not a generic radiator size."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show equipment access, airflow directions and coolant pipe interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A remote cooling package requires selected-engine cooling design, not a generic radiator size.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-cummins-application","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-generator-remote-radiator","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-generator-remote-radiator","illustration":"https://eloragrid.ai/library/illustrations/ga-generator-remote-radiator.svg"},{"slug":"ga-generator-vibration-isolator","name":"Generator vibration isolator","kind":"object","abbreviation":"GA","aliases":["genset resilient mount","Generator vibration isolator CAD","Generator vibration isolator general arrangement","Generator vibration isolator panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A vibration isolator supports the generator through the specified resilient mounting arrangement.","description":["A vibration isolator supports the generator through the specified resilient mounting arrangement.","Cross-reference fixing points, loading and movement details. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Cross-reference fixing points, loading and movement details.","The mount's external outline does not establish its load capacity or vibration behaviour."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Cross-reference fixing points, loading and movement details.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The mount's external outline does not establish its load capacity or vibration behaviour.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-cummins-application","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-generator-vibration-isolator","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-generator-vibration-isolator","illustration":"https://eloragrid.ai/library/illustrations/ga-generator-vibration-isolator.svg"},{"slug":"ga-generator-acoustic-canopy","name":"Generator acoustic canopy","kind":"object","abbreviation":"GA","aliases":["genset sound enclosure","Generator acoustic canopy CAD","Generator acoustic canopy general arrangement","Generator acoustic canopy panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An acoustic canopy surrounds the selected generator with its documented access and ventilation arrangement.","description":["An acoustic canopy surrounds the selected generator with its documented access and ventilation arrangement.","Coordinate doors, intake/discharge openings and equipment removal route. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate doors, intake/discharge openings and equipment removal route.","A canopy envelope can be significantly larger than the underlying generator skid."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate doors, intake/discharge openings and equipment removal route.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A canopy envelope can be significantly larger than the underlying generator skid.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-cummins-application","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-generator-acoustic-canopy","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-generator-acoustic-canopy","illustration":"https://eloragrid.ai/library/illustrations/ga-generator-acoustic-canopy.svg"},{"slug":"ga-generator-coolant-heater","name":"Generator coolant heater","kind":"object","abbreviation":"GA","aliases":["engine jacket water heater","Generator coolant heater CAD","Generator coolant heater general arrangement","Generator coolant heater panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A coolant heater supplies the selected standby engine heating function.","description":["A coolant heater supplies the selected standby engine heating function.","Locate coolant connections, electrical supply and service access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Locate coolant connections, electrical supply and service access.","Heater presence does not specify the required operating temperature or engine starting performance."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Locate coolant connections, electrical supply and service access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Heater presence does not specify the required operating temperature or engine starting performance.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-cummins-application","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-generator-coolant-heater","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-generator-coolant-heater","illustration":"https://eloragrid.ai/library/illustrations/ga-generator-coolant-heater.svg"},{"slug":"ga-generator-starting-battery","name":"Generator starting battery","kind":"object","abbreviation":"GA","aliases":["engine cranking battery","Generator starting battery CAD","Generator starting battery general arrangement","Generator starting battery panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A starting battery supplies the documented engine starting circuit.","description":["A starting battery supplies the documented engine starting circuit.","Show battery restraint, cable approach and replacement access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show battery restraint, cable approach and replacement access.","A starting battery and a station control battery perform different duties."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show battery restraint, cable approach and replacement access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A starting battery and a station control battery perform different duties.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-cummins-application","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-generator-starting-battery","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-generator-starting-battery","illustration":"https://eloragrid.ai/library/illustrations/ga-generator-starting-battery.svg"},{"slug":"ga-generator-paralleling-controller","name":"Generator paralleling controller","kind":"object","abbreviation":"GA","aliases":["synchronising controller","Generator paralleling controller CAD","Generator paralleling controller general arrangement","Generator paralleling controller panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A paralleling controller coordinates specified generator and switching functions.","description":["A paralleling controller coordinates specified generator and switching functions.","Coordinate controller terminals, metering inputs, communications and operator interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate controller terminals, metering inputs, communications and operator interfaces.","A controller outline does not establish the site's synchronising, protection or transfer sequence."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate controller terminals, metering inputs, communications and operator interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A controller outline does not establish the site's synchronising, protection or transfer sequence.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"generator-controls","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-generator-paralleling-controller","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-generator-paralleling-controller","illustration":"https://eloragrid.ai/library/illustrations/ga-generator-paralleling-controller.svg"},{"slug":"ga-pv-string-combiner-box","name":"PV string combiner box","kind":"object","abbreviation":"GA","aliases":["solar DC combiner","PV string combiner box CAD","PV string combiner box general arrangement","PV string combiner box panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A PV combiner groups specified photovoltaic string connections and associated devices.","description":["A PV combiner groups specified photovoltaic string connections and associated devices.","Show string cable entries, outgoing DC connection and inspection access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show string cable entries, outgoing DC connection and inspection access.","Combiner protection and isolation requirements depend on the actual array topology."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show string cable entries, outgoing DC connection and inspection access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Combiner protection and isolation requirements depend on the actual array topology.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-victron-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-pv-string-combiner-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-pv-string-combiner-box","illustration":"https://eloragrid.ai/library/illustrations/ga-pv-string-combiner-box.svg"},{"slug":"ga-pv-inverter-cabinet","name":"PV inverter cabinet","kind":"object","abbreviation":"GA","aliases":["solar inverter","PV inverter cabinet CAD","PV inverter cabinet general arrangement","PV inverter cabinet panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A PV inverter converts the selected array DC power to its specified AC interface.","description":["A PV inverter converts the selected array DC power to its specified AC interface.","Coordinate DC and AC terminals, airflow and service access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate DC and AC terminals, airflow and service access.","A PV inverter and a battery inverter may have different source and control interfaces."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate DC and AC terminals, airflow and service access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A PV inverter and a battery inverter may have different source and control interfaces.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-victron-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-pv-inverter-cabinet","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-pv-inverter-cabinet","illustration":"https://eloragrid.ai/library/illustrations/ga-pv-inverter-cabinet.svg"},{"slug":"ga-pv-dc-isolator-enclosure","name":"PV DC isolator enclosure","kind":"object","abbreviation":"GA","aliases":["solar array disconnection","PV DC isolator enclosure CAD","PV DC isolator enclosure general arrangement","PV DC isolator enclosure panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A PV isolator arrangement provides the specified array-side DC switching interface.","description":["A PV isolator arrangement provides the specified array-side DC switching interface.","Show pole connections, cable entries and operator access from the selected product. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show pole connections, cable entries and operator access from the selected product.","DC duty and PV application suitability must be verified rather than inferred from enclosure shape."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show pole connections, cable entries and operator access from the selected product.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"DC duty and PV application suitability must be verified rather than inferred from enclosure shape.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-pv-dc-isolator-enclosure","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-pv-dc-isolator-enclosure","illustration":"https://eloragrid.ai/library/illustrations/ga-pv-dc-isolator-enclosure.svg"},{"slug":"ga-mppt-solar-charge-controller","name":"MPPT solar charge controller","kind":"object","abbreviation":"GA","aliases":["solar regulator","MPPT solar charge controller CAD","MPPT solar charge controller general arrangement","MPPT solar charge controller panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An MPPT controller interfaces the selected photovoltaic source with a DC charging arrangement.","description":["An MPPT controller interfaces the selected photovoltaic source with a DC charging arrangement.","Coordinate PV and battery terminals, cooling and communication interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate PV and battery terminals, cooling and communication interfaces.","A charge controller is not a grid-connected AC inverter."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate PV and battery terminals, cooling and communication interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A charge controller is not a grid-connected AC inverter.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-victron-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-mppt-solar-charge-controller","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-mppt-solar-charge-controller","illustration":"https://eloragrid.ai/library/illustrations/ga-mppt-solar-charge-controller.svg"},{"slug":"ga-battery-inverter-charger","name":"Battery inverter-charger","kind":"object","abbreviation":"GA","aliases":["bidirectional inverter charger","Battery inverter-charger CAD","Battery inverter-charger general arrangement","Battery inverter-charger panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An inverter-charger interfaces a battery circuit with the specified AC supply/load system.","description":["An inverter-charger interfaces a battery circuit with the specified AC supply/load system.","Reserve AC/DC cable zones, service access and remote control interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve AC/DC cable zones, service access and remote control interfaces.","Bidirectional capability does not imply suitability for every grid or battery system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve AC/DC cable zones, service access and remote control interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Bidirectional capability does not imply suitability for every grid or battery system.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-victron-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-battery-inverter-charger","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-battery-inverter-charger","illustration":"https://eloragrid.ai/library/illustrations/ga-battery-inverter-charger.svg"},{"slug":"ga-battery-management-system-module","name":"Battery management system module","kind":"object","abbreviation":"BMS","aliases":["BMS controller","Battery management system module CAD","Battery management system module general arrangement","Battery management system module panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A BMS module performs the selected battery monitoring and control interface functions.","description":["A BMS module performs the selected battery monitoring and control interface functions.","Coordinate sensing, contactor-control, communications and battery connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate sensing, contactor-control, communications and battery connections.","A BMS controller and the complete battery enclosure are different scheduled objects."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate sensing, contactor-control, communications and battery connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A BMS controller and the complete battery enclosure are different scheduled objects.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-victron-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-battery-management-system-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-battery-management-system-module","illustration":"https://eloragrid.ai/library/illustrations/ga-battery-management-system-module.svg"},{"slug":"ga-battery-dc-disconnect-assembly","name":"Battery DC disconnect assembly","kind":"object","abbreviation":"GA","aliases":["battery isolation box","Battery DC disconnect assembly CAD","Battery DC disconnect assembly general arrangement","Battery DC disconnect assembly panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A battery disconnect assembly provides the documented DC isolation or switching arrangement.","description":["A battery disconnect assembly provides the documented DC isolation or switching arrangement.","Coordinate high-current cable bends, operating access and control interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate high-current cable bends, operating access and control interfaces.","Switching current, interrupting duty and system isolation requirements need separate verification."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate high-current cable bends, operating access and control interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Switching current, interrupting duty and system isolation requirements need separate verification.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-victron-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-battery-dc-disconnect-assembly","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-battery-dc-disconnect-assembly","illustration":"https://eloragrid.ai/library/illustrations/ga-battery-dc-disconnect-assembly.svg"},{"slug":"ga-battery-precharge-assembly","name":"Battery precharge assembly","kind":"object","abbreviation":"DC","aliases":["DC link precharge module","Battery precharge assembly CAD","Battery precharge assembly general arrangement","Battery precharge assembly panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A precharge arrangement controls the specified initial charging of a downstream DC interface.","description":["A precharge arrangement controls the specified initial charging of a downstream DC interface.","Coordinate resistive elements, switching devices and control wiring. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate resistive elements, switching devices and control wiring.","Precharge timing and component duty depend on the selected inverter and battery system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate resistive elements, switching devices and control wiring.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Precharge timing and component duty depend on the selected inverter and battery system.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-victron-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-battery-precharge-assembly","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-battery-precharge-assembly","illustration":"https://eloragrid.ai/library/illustrations/ga-battery-precharge-assembly.svg"},{"slug":"ga-battery-dc-bus-distribution-module","name":"Battery DC bus distribution module","kind":"object","abbreviation":"DC","aliases":["DC bus fuse module","Battery DC bus distribution module CAD","Battery DC bus distribution module general arrangement","Battery DC bus distribution module panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A DC distribution module organises battery-side supply and outgoing circuits.","description":["A DC distribution module organises battery-side supply and outgoing circuits.","Show cable terminals, fuse service space and protective-cover removal. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show cable terminals, fuse service space and protective-cover removal.","A distribution module does not by itself provide the complete battery safety/control system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show cable terminals, fuse service space and protective-cover removal.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A distribution module does not by itself provide the complete battery safety/control system.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-victron-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-battery-dc-bus-distribution-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-battery-dc-bus-distribution-module","illustration":"https://eloragrid.ai/library/illustrations/ga-battery-dc-bus-distribution-module.svg"},{"slug":"ga-battery-current-shunt","name":"Battery current shunt","kind":"object","abbreviation":"DC","aliases":["DC measurement shunt","Battery current shunt CAD","Battery current shunt general arrangement","Battery current shunt panel layout"],"category":"measurement-protection","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A current shunt provides a specified DC current-measurement interface.","description":["A current shunt provides a specified DC current-measurement interface.","Coordinate high-current connections and separate sense-wire routing. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate high-current connections and separate sense-wire routing.","A shunt measures voltage drop for its instrument; it is not a CT."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate high-current connections and separate sense-wire routing.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A shunt measures voltage drop for its instrument; it is not a CT.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-victron-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-object-ga-battery-current-shunt","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-battery-current-shunt","illustration":"https://eloragrid.ai/library/illustrations/ga-battery-current-shunt.svg"},{"slug":"ga-energy-management-controller","name":"Energy-management controller","kind":"object","abbreviation":"EMS","aliases":["EMS microgrid controller","Energy-management controller CAD","Energy-management controller general arrangement","Energy-management controller panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An energy-management controller coordinates the selected monitoring and dispatch interfaces.","description":["An energy-management controller coordinates the selected monitoring and dispatch interfaces.","Show communications, auxiliary supply and operator/network connection points. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show communications, auxiliary supply and operator/network connection points.","The controller enclosure does not define the site's operating strategy or protection settings."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show communications, auxiliary supply and operator/network connection points.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The controller enclosure does not define the site's operating strategy or protection settings.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-victron-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-energy-management-controller","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-energy-management-controller","illustration":"https://eloragrid.ai/library/illustrations/ga-energy-management-controller.svg"},{"slug":"ga-outdoor-energy-storage-container","name":"Outdoor energy-storage container","kind":"object","abbreviation":"GA","aliases":["BESS container","Outdoor energy-storage container CAD","Outdoor energy-storage container general arrangement","Outdoor energy-storage container panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An energy-storage container houses the selected storage, conversion and support equipment arrangement.","description":["An energy-storage container houses the selected storage, conversion and support equipment arrangement.","Coordinate equipment access, HVAC interfaces, cable routes and project fire-design references. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate equipment access, HVAC interfaces, cable routes and project fire-design references.","Container outside dimensions do not describe internal separation, system capacity or a compliant site layout."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate equipment access, HVAC interfaces, cable routes and project fire-design references.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Container outside dimensions do not describe internal separation, system capacity or a compliant site layout.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"energy-storage","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-outdoor-energy-storage-container","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-outdoor-energy-storage-container","illustration":"https://eloragrid.ai/library/illustrations/ga-outdoor-energy-storage-container.svg"},{"slug":"ga-battery-cooling-unit","name":"Battery cooling unit","kind":"object","abbreviation":"GA","aliases":["BESS thermal management","Battery cooling unit CAD","Battery cooling unit general arrangement","Battery cooling unit panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A battery cooling unit provides the selected thermal-control interface for a storage system.","description":["A battery cooling unit provides the selected thermal-control interface for a storage system.","Coordinate coolant or air connections, service access and controls. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate coolant or air connections, service access and controls.","Thermal management must follow the selected battery system design."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate coolant or air connections, service access and controls.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Thermal management must follow the selected battery system design.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"energy-storage","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-battery-cooling-unit","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-battery-cooling-unit","illustration":"https://eloragrid.ai/library/illustrations/ga-battery-cooling-unit.svg"},{"slug":"ga-battery-fire-system-interface-panel","name":"Battery fire-system interface panel","kind":"object","abbreviation":"GA","aliases":["BESS fire alarm interface","Battery fire-system interface panel CAD","Battery fire-system interface panel general arrangement","Battery fire-system interface panel panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A fire-system interface panel provides the documented connection between storage equipment and the project's fire system.","description":["A fire-system interface panel provides the documented connection between storage equipment and the project's fire system.","Show signal interfaces and access separately from the battery power cabling. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show signal interfaces and access separately from the battery power cabling.","A generic interface box is not a specified detection or suppression system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show signal interfaces and access separately from the battery power cabling.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A generic interface box is not a specified detection or suppression system.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-engineering-design","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-battery-fire-system-interface-panel","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-battery-fire-system-interface-panel","illustration":"https://eloragrid.ai/library/illustrations/ga-battery-fire-system-interface-panel.svg"},{"slug":"ga-smoke-detector-installation-point","name":"Smoke detector installation point","kind":"object","abbreviation":"GA","aliases":["fire detection device","Smoke detector installation point CAD","Smoke detector installation point general arrangement","Smoke detector installation point panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A detector installation point records the selected fire-detection location in a coordinated room drawing.","description":["A detector installation point records the selected fire-detection location in a coordinated room drawing.","Cross-reference the fire designer's device type, location and wiring documentation. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Cross-reference the fire designer's device type, location and wiring documentation.","A concept position does not establish fire-code coverage or suitability for a battery environment."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Cross-reference the fire designer's device type, location and wiring documentation.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A concept position does not establish fire-code coverage or suitability for a battery environment.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-engineering-design","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-smoke-detector-installation-point","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-smoke-detector-installation-point","illustration":"https://eloragrid.ai/library/illustrations/ga-smoke-detector-installation-point.svg"},{"slug":"ga-fire-alarm-control-panel-location","name":"Fire alarm control panel location","kind":"object","abbreviation":"GA","aliases":["FACP","Fire alarm control panel location CAD","Fire alarm control panel location general arrangement","Fire alarm control panel location panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A fire-alarm panel location coordinates the specified control equipment within the room or building layout.","description":["A fire-alarm panel location coordinates the specified control equipment within the room or building layout.","Reserve operation, wiring and service access defined by the fire design. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve operation, wiring and service access defined by the fire design.","Its position must be coordinated with the project fire system rather than selected from this library preview."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve operation, wiring and service access defined by the fire design.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its position must be coordinated with the project fire system rather than selected from this library preview.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-engineering-design","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-fire-alarm-control-panel-location","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-fire-alarm-control-panel-location","illustration":"https://eloragrid.ai/library/illustrations/ga-fire-alarm-control-panel-location.svg"},{"slug":"ga-emergency-stop-station","name":"Emergency stop station","kind":"object","abbreviation":"GA","aliases":["E-stop emergency shutdown station","Emergency stop station CAD","Emergency stop station general arrangement","Emergency stop station panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An emergency stop station houses the specified emergency-control actuator and contacts.","description":["An emergency stop station houses the specified emergency-control actuator and contacts.","Coordinate operator reach, labeling, wiring and protective enclosure. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate operator reach, labeling, wiring and protective enclosure.","The physical station does not define which equipment stops or how restart is managed."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate operator reach, labeling, wiring and protective enclosure.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The physical station does not define which equipment stops or how restart is managed.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-emergency-stop-station","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-emergency-stop-station","illustration":"https://eloragrid.ai/library/illustrations/ga-emergency-stop-station.svg"},{"slug":"ga-pilot-light-station","name":"Pilot-light station","kind":"object","abbreviation":"GA","aliases":["indicator panel","Pilot-light station CAD","Pilot-light station general arrangement","Pilot-light station panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A pilot-light station displays the documented equipment states through its lamps.","description":["A pilot-light station displays the documented equipment states through its lamps.","Show cut-outs, lenses, labels and rear contact/body clearance. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show cut-outs, lenses, labels and rear contact/body clearance.","Colour and position alone do not define the operational meaning; the legend and controls documentation do."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show cut-outs, lenses, labels and rear contact/body clearance.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Colour and position alone do not define the operational meaning; the legend and controls documentation do.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-pilot-light-station","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-pilot-light-station","illustration":"https://eloragrid.ai/library/illustrations/ga-pilot-light-station.svg"},{"slug":"ga-selector-switch-station","name":"Selector-switch station","kind":"object","abbreviation":"GA","aliases":["local remote selector","Selector-switch station CAD","Selector-switch station general arrangement","Selector-switch station panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A selector station provides the selected maintained or returning control positions.","description":["A selector station provides the selected maintained or returning control positions.","Coordinate actuator front space, rear contacts and engraved labels. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate actuator front space, rear contacts and engraved labels.","The physical number of positions does not reveal the contact truth table."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate actuator front space, rear contacts and engraved labels.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The physical number of positions does not reveal the contact truth table.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-selector-switch-station","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-selector-switch-station","illustration":"https://eloragrid.ai/library/illustrations/ga-selector-switch-station.svg"},{"slug":"ga-trapped-key-interlock-assembly","name":"Trapped-key interlock assembly","kind":"object","abbreviation":"GA","aliases":["key exchange system","Trapped-key interlock assembly CAD","Trapped-key interlock assembly general arrangement","Trapped-key interlock assembly panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A trapped-key arrangement coordinates access or switching through the selected mechanical key sequence.","description":["A trapped-key arrangement coordinates access or switching through the selected mechanical key sequence.","Show key devices, locks, exchange boxes and operator access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show key devices, locks, exchange boxes and operator access.","An interlock assembly must follow a documented sequence; a generic key box cannot establish that sequence."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show key devices, locks, exchange boxes and operator access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An interlock assembly must follow a documented sequence; a generic key box cannot establish that sequence.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-trapped-key-interlock-assembly","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-trapped-key-interlock-assembly","illustration":"https://eloragrid.ai/library/illustrations/ga-trapped-key-interlock-assembly.svg"},{"slug":"ga-door-mounted-pushbutton-enclosure","name":"Door-mounted pushbutton enclosure","kind":"object","abbreviation":"GA","aliases":["local control station","Door-mounted pushbutton enclosure CAD","Door-mounted pushbutton enclosure general arrangement","Door-mounted pushbutton enclosure panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A local control station houses the specified operator actuators and contacts.","description":["A local control station houses the specified operator actuators and contacts.","Coordinate the station mounting, cable approach and rear depth. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate the station mounting, cable approach and rear depth.","An enclosure with actuator holes is not a complete circuit definition."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate the station mounting, cable approach and rear depth.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An enclosure with actuator holes is not a complete circuit definition.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-door-mounted-pushbutton-enclosure","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-door-mounted-pushbutton-enclosure","illustration":"https://eloragrid.ai/library/illustrations/ga-door-mounted-pushbutton-enclosure.svg"},{"slug":"ga-panel-service-outlet","name":"Panel service outlet","kind":"object","abbreviation":"GA","aliases":["maintenance socket","Panel service outlet CAD","Panel service outlet general arrangement","Panel service outlet panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A panel service outlet provides the specified auxiliary socket interface.","description":["A panel service outlet provides the specified auxiliary socket interface.","Coordinate access, supply protection and local installation requirements. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate access, supply protection and local installation requirements.","Outlet type and supply characteristics are regional and project-specific."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate access, supply protection and local installation requirements.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Outlet type and supply characteristics are regional and project-specific.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-panel-service-outlet","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-panel-service-outlet","illustration":"https://eloragrid.ai/library/illustrations/ga-panel-service-outlet.svg"},{"slug":"ga-panel-inspection-lighting","name":"Panel inspection lighting","kind":"object","abbreviation":"GA","aliases":["cabinet luminaire","Panel inspection lighting CAD","Panel inspection lighting general arrangement","Panel inspection lighting panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A cabinet luminaire illuminates the selected internal service area.","description":["A cabinet luminaire illuminates the selected internal service area.","Coordinate mounting, door switches and supply wiring. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate mounting, door switches and supply wiring.","Lighting placement should suit the access task and avoid equipment interference."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate mounting, door switches and supply wiring.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Lighting placement should suit the access task and avoid equipment interference.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-phoenix-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-panel-inspection-lighting","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-panel-inspection-lighting","illustration":"https://eloragrid.ai/library/illustrations/ga-panel-inspection-lighting.svg"},{"slug":"automationdirect-brx-series-plc","name":"AutomationDirect BRX Series PLC","kind":"object","abbreviation":"BRX Series PLC","aliases":["BRX Series PLC","BRX Series PLC CAD","BRX Series PLC general arrangement","BRX Series PLC panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect BRX Series PLC is a plc cpu module product family referenced for electrical equipment layout.","description":["AutomationDirect BRX Series PLC is a plc cpu module product family referenced for electrical equipment layout.","Position expansion interfaces, communication ports and removable memory access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect BRX Series PLC from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Position expansion interfaces, communication ports and removable memory access.","The CPU is one part of a system that also needs power, I/O and communications."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Position expansion interfaces, communication ports and removable memory access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The CPU is one part of a system that also needs power, I/O and communications.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"BRX Series PLC"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-plc-cpu-module","switchboard"],"artwork":"edu-object-automationdirect-brx-series-plc","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-brx-series-plc","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-brx-series-plc.svg"},{"slug":"automationdirect-click-plcs","name":"AutomationDirect CLICK PLCs","kind":"object","abbreviation":"CLICK PLCs","aliases":["CLICK PLCs","CLICK PLCs CAD","CLICK PLCs general arrangement","CLICK PLCs panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect CLICK PLCs is a plc cpu module product family referenced for electrical equipment layout.","description":["AutomationDirect CLICK PLCs is a plc cpu module product family referenced for electrical equipment layout.","Position expansion interfaces, communication ports and removable memory access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect CLICK PLCs from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Position expansion interfaces, communication ports and removable memory access.","The CPU is one part of a system that also needs power, I/O and communications."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Position expansion interfaces, communication ports and removable memory access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The CPU is one part of a system that also needs power, I/O and communications.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"CLICK PLCs"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-plc-cpu-module","switchboard"],"artwork":"edu-object-automationdirect-click-plcs","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-click-plcs","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-click-plcs.svg"},{"slug":"automationdirect-productivity1000-pac","name":"AutomationDirect Productivity1000 PAC","kind":"object","abbreviation":"Productivity1000 PAC","aliases":["Productivity1000 PAC","Productivity1000 PAC CAD","Productivity1000 PAC general arrangement","Productivity1000 PAC panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect Productivity1000 PAC is a plc cpu module product family referenced for electrical equipment layout.","description":["AutomationDirect Productivity1000 PAC is a plc cpu module product family referenced for electrical equipment layout.","Position expansion interfaces, communication ports and removable memory access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect Productivity1000 PAC from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Position expansion interfaces, communication ports and removable memory access.","The CPU is one part of a system that also needs power, I/O and communications."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Position expansion interfaces, communication ports and removable memory access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The CPU is one part of a system that also needs power, I/O and communications.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"Productivity1000 PAC"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-plc-cpu-module","switchboard"],"artwork":"edu-object-automationdirect-productivity1000-pac","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-productivity1000-pac","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-productivity1000-pac.svg"},{"slug":"automationdirect-productivity2000-pac","name":"AutomationDirect Productivity2000 PAC","kind":"object","abbreviation":"Productivity2000 PAC","aliases":["Productivity2000 PAC","Productivity2000 PAC CAD","Productivity2000 PAC general arrangement","Productivity2000 PAC panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect Productivity2000 PAC is a plc cpu module product family referenced for electrical equipment layout.","description":["AutomationDirect Productivity2000 PAC is a plc cpu module product family referenced for electrical equipment layout.","Position expansion interfaces, communication ports and removable memory access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect Productivity2000 PAC from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Position expansion interfaces, communication ports and removable memory access.","The CPU is one part of a system that also needs power, I/O and communications."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Position expansion interfaces, communication ports and removable memory access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The CPU is one part of a system that also needs power, I/O and communications.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"Productivity2000 PAC"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-plc-cpu-module","switchboard"],"artwork":"edu-object-automationdirect-productivity2000-pac","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-productivity2000-pac","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-productivity2000-pac.svg"},{"slug":"automationdirect-productivity3000-pac","name":"AutomationDirect Productivity3000 PAC","kind":"object","abbreviation":"Productivity3000 PAC","aliases":["Productivity3000 PAC","Productivity3000 PAC CAD","Productivity3000 PAC general arrangement","Productivity3000 PAC panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect Productivity3000 PAC is a plc cpu module product family referenced for electrical equipment layout.","description":["AutomationDirect Productivity3000 PAC is a plc cpu module product family referenced for electrical equipment layout.","Position expansion interfaces, communication ports and removable memory access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect Productivity3000 PAC from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Position expansion interfaces, communication ports and removable memory access.","The CPU is one part of a system that also needs power, I/O and communications."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Position expansion interfaces, communication ports and removable memory access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The CPU is one part of a system that also needs power, I/O and communications.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"Productivity3000 PAC"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-plc-cpu-module","switchboard"],"artwork":"edu-object-automationdirect-productivity3000-pac","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-productivity3000-pac","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-productivity3000-pac.svg"},{"slug":"automationdirect-terminator-field-i-o","name":"AutomationDirect Terminator Field I/O","kind":"object","abbreviation":"Terminator Field I/O","aliases":["Terminator Field I/O","Terminator Field I/O CAD","Terminator Field I/O general arrangement","Terminator Field I/O panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect Terminator Field I/O is a remote i/o station product family referenced for electrical equipment layout.","description":["AutomationDirect Terminator Field I/O is a remote i/o station product family referenced for electrical equipment layout.","Include the coupler, power feeds, complete module row and end accessories. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect Terminator Field I/O from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Include the coupler, power feeds, complete module row and end accessories.","A network coupler is not a stand-alone PLC processor."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Include the coupler, power feeds, complete module row and end accessories.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A network coupler is not a stand-alone PLC processor.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"Terminator Field I/O"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-remote-i-o-station","switchboard"],"artwork":"edu-object-automationdirect-terminator-field-i-o","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-terminator-field-i-o","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-terminator-field-i-o.svg"},{"slug":"automationdirect-protos-x-field-i-o","name":"AutomationDirect Protos X Field I/O","kind":"object","abbreviation":"Protos X Field I/O","aliases":["Protos X Field I/O","Protos X Field I/O CAD","Protos X Field I/O general arrangement","Protos X Field I/O panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect Protos X Field I/O is a remote i/o station product family referenced for electrical equipment layout.","description":["AutomationDirect Protos X Field I/O is a remote i/o station product family referenced for electrical equipment layout.","Include the coupler, power feeds, complete module row and end accessories. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect Protos X Field I/O from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Include the coupler, power feeds, complete module row and end accessories.","A network coupler is not a stand-alone PLC processor."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Include the coupler, power feeds, complete module row and end accessories.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A network coupler is not a stand-alone PLC processor.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"Protos X Field I/O"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-remote-i-o-station","switchboard"],"artwork":"edu-object-automationdirect-protos-x-field-i-o","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-protos-x-field-i-o","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-protos-x-field-i-o.svg"},{"slug":"automationdirect-ziplinks","name":"AutomationDirect ZIPLinks","kind":"object","abbreviation":"ZIPLinks","aliases":["ZIPLinks","ZIPLinks CAD","ZIPLinks general arrangement","ZIPLinks panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect ZIPLinks is a terminal marshalling interface product family referenced for electrical equipment layout.","description":["AutomationDirect ZIPLinks is a terminal marshalling interface product family referenced for electrical equipment layout.","Reserve plugs, labels and cable exits for each defined signal group. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect ZIPLinks from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve plugs, labels and cable exits for each defined signal group.","A neat physical row does not establish the electrical channel mapping."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve plugs, labels and cable exits for each defined signal group.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A neat physical row does not establish the electrical channel mapping.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"ZIPLinks"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-terminal-marshalling-interface","terminal-strip"],"artwork":"edu-object-automationdirect-ziplinks","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-ziplinks","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-ziplinks.svg"},{"slug":"automationdirect-dinnectors","name":"AutomationDirect DINnectors","kind":"object","abbreviation":"DINnectors","aliases":["DINnectors","DINnectors CAD","DINnectors general arrangement","DINnectors panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect DINnectors is a feed-through terminal block product family referenced for electrical equipment layout.","description":["AutomationDirect DINnectors is a feed-through terminal block product family referenced for electrical equipment layout.","Document terminal number, wire sides and end accessories. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect DINnectors from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Document terminal number, wire sides and end accessories.","Its rail mounting and conductor capacity are product-specific."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Document terminal number, wire sides and end accessories.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its rail mounting and conductor capacity are product-specific.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"DINnectors"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-feed-through-terminal-block","terminal-strip"],"artwork":"edu-object-automationdirect-dinnectors","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-dinnectors","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-dinnectors.svg"},{"slug":"automationdirect-konnect-it-din-rail-terminals","name":"AutomationDirect Konnect-It DIN-rail terminals","kind":"object","abbreviation":"Konnect-It DIN-rail terminals","aliases":["Konnect-It DIN-rail terminals","Konnect-It DIN-rail terminals CAD","Konnect-It DIN-rail terminals general arrangement","Konnect-It DIN-rail terminals panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect Konnect-It DIN-rail terminals is a feed-through terminal block product family referenced for electrical equipment layout.","description":["AutomationDirect Konnect-It DIN-rail terminals is a feed-through terminal block product family referenced for electrical equipment layout.","Document terminal number, wire sides and end accessories. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect Konnect-It DIN-rail terminals from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Document terminal number, wire sides and end accessories.","Its rail mounting and conductor capacity are product-specific."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Document terminal number, wire sides and end accessories.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its rail mounting and conductor capacity are product-specific.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"Konnect-It DIN-rail terminals"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-feed-through-terminal-block","terminal-strip"],"artwork":"edu-object-automationdirect-konnect-it-din-rail-terminals","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-konnect-it-din-rail-terminals","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-konnect-it-din-rail-terminals.svg"},{"slug":"automationdirect-c-more-panels","name":"AutomationDirect C-more Panels","kind":"object","abbreviation":"C-more Panels","aliases":["C-more Panels","C-more Panels CAD","C-more Panels general arrangement","C-more Panels panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect C-more Panels is a hmi touchscreen product family referenced for electrical equipment layout.","description":["AutomationDirect C-more Panels is a hmi touchscreen product family referenced for electrical equipment layout.","Coordinate the door cut-out, mounting clips, rear depth and cable bend zone. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect C-more Panels from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate the door cut-out, mounting clips, rear depth and cable bend zone.","Display diagonal is different from cut-out and overall enclosure dimensions."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate the door cut-out, mounting clips, rear depth and cable bend zone.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Display diagonal is different from cut-out and overall enclosure dimensions.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"C-more Panels"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-hmi-touchscreen","switchboard"],"artwork":"edu-object-automationdirect-c-more-panels","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-c-more-panels","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-c-more-panels.svg"},{"slug":"automationdirect-c-more-micro-graphic-panels","name":"AutomationDirect C-more Micro Graphic Panels","kind":"object","abbreviation":"C-more Micro Graphic Panels","aliases":["C-more Micro Graphic Panels","C-more Micro Graphic Panels CAD","C-more Micro Graphic Panels general arrangement","C-more Micro Graphic Panels panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect C-more Micro Graphic Panels is a hmi touchscreen product family referenced for electrical equipment layout.","description":["AutomationDirect C-more Micro Graphic Panels is a hmi touchscreen product family referenced for electrical equipment layout.","Coordinate the door cut-out, mounting clips, rear depth and cable bend zone. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect C-more Micro Graphic Panels from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate the door cut-out, mounting clips, rear depth and cable bend zone.","Display diagonal is different from cut-out and overall enclosure dimensions."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate the door cut-out, mounting clips, rear depth and cable bend zone.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Display diagonal is different from cut-out and overall enclosure dimensions.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"C-more Micro Graphic Panels"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-hmi-touchscreen","switchboard"],"artwork":"edu-object-automationdirect-c-more-micro-graphic-panels","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-c-more-micro-graphic-panels","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-c-more-micro-graphic-panels.svg"},{"slug":"automationdirect-gs-and-durapulse-ac-drives","name":"AutomationDirect GS and DURApulse AC drives","kind":"object","abbreviation":"GS and DURApulse AC drives","aliases":["GS and DURApulse AC drives","GS and DURApulse AC drives CAD","GS and DURApulse AC drives general arrangement","GS and DURApulse AC drives panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect GS and DURApulse AC drives is a variable-frequency drive product family referenced for electrical equipment layout.","description":["AutomationDirect GS and DURApulse AC drives is a variable-frequency drive product family referenced for electrical equipment layout.","Reserve cooling airflow, power-cable bends, control wiring and any filter or reactor space. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect GS and DURApulse AC drives from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve cooling airflow, power-cable bends, control wiring and any filter or reactor space.","A drive cabinet envelope includes accessories and service access beyond the inverter module body."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve cooling airflow, power-cable bends, control wiring and any filter or reactor space.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A drive cabinet envelope includes accessories and service access beyond the inverter module body.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"GS and DURApulse AC drives"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-variable-frequency-drive","switchboard"],"artwork":"edu-object-automationdirect-gs-and-durapulse-ac-drives","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-gs-and-durapulse-ac-drives","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-gs-and-durapulse-ac-drives.svg"},{"slug":"automationdirect-lr-series-line-reactors","name":"AutomationDirect LR Series line reactors","kind":"object","abbreviation":"LR Series line reactors","aliases":["LR Series line reactors","LR Series line reactors CAD","LR Series line reactors general arrangement","LR Series line reactors panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect LR Series line reactors is a ac line reactor product family referenced for electrical equipment layout.","description":["AutomationDirect LR Series line reactors is a ac line reactor product family referenced for electrical equipment layout.","Show its mounting orientation, ventilation and heavy-conductor terminal access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect LR Series line reactors from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show its mounting orientation, ventilation and heavy-conductor terminal access.","A reactor and a transformer may have similar packages but perform different circuit functions."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show its mounting orientation, ventilation and heavy-conductor terminal access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A reactor and a transformer may have similar packages but perform different circuit functions.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"LR Series line reactors"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-ac-line-reactor","switchboard"],"artwork":"edu-object-automationdirect-lr-series-line-reactors","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-lr-series-line-reactors","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-lr-series-line-reactors.svg"},{"slug":"automationdirect-bimed-cable-glands","name":"AutomationDirect Bimed cable glands","kind":"object","abbreviation":"Bimed cable glands","aliases":["Bimed cable glands","Bimed cable glands CAD","Bimed cable glands general arrangement","Bimed cable glands panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect Bimed cable glands is a cable gland product family referenced for electrical equipment layout.","description":["AutomationDirect Bimed cable glands is a cable gland product family referenced for electrical equipment layout.","Show entry holes, nut access and the selected cable approach. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect Bimed cable glands from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show entry holes, nut access and the selected cable approach.","A hole diameter alone does not establish sealing, armour termination or cable compatibility."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show entry holes, nut access and the selected cable approach.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A hole diameter alone does not establish sealing, armour termination or cable compatibility.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"Bimed cable glands"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-cable-gland","terminal-strip"],"artwork":"edu-object-automationdirect-bimed-cable-glands","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-bimed-cable-glands","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-bimed-cable-glands.svg"},{"slug":"automationdirect-zipport-multi-wire-connectors","name":"AutomationDirect ZIPport Multi-Wire Connectors","kind":"object","abbreviation":"ZIPport Multi-Wire Connectors","aliases":["ZIPport Multi-Wire Connectors","ZIPport Multi-Wire Connectors CAD","ZIPport Multi-Wire Connectors general arrangement","ZIPport Multi-Wire Connectors panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect ZIPport Multi-Wire Connectors is a bulkhead connector product family referenced for electrical equipment layout.","description":["AutomationDirect ZIPport Multi-Wire Connectors is a bulkhead connector product family referenced for electrical equipment layout.","Reserve front and rear connector bodies, locking hardware and cable bends. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect ZIPport Multi-Wire Connectors from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve front and rear connector bodies, locking hardware and cable bends.","A connector face outline does not describe pin assignment or electrical capability."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve front and rear connector bodies, locking hardware and cable bends.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A connector face outline does not describe pin assignment or electrical capability.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"ZIPport Multi-Wire Connectors"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-bulkhead-connector","terminal-strip"],"artwork":"edu-object-automationdirect-zipport-multi-wire-connectors","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-zipport-multi-wire-connectors","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-zipport-multi-wire-connectors.svg"},{"slug":"automationdirect-zipport-panel-interface-connectors","name":"AutomationDirect ZIPport Panel Interface Connectors","kind":"object","abbreviation":"ZIPport Panel Interface Connectors","aliases":["ZIPport Panel Interface Connectors","ZIPport Panel Interface Connectors CAD","ZIPport Panel Interface Connectors general arrangement","ZIPport Panel Interface Connectors panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect ZIPport Panel Interface Connectors is a bulkhead connector product family referenced for electrical equipment layout.","description":["AutomationDirect ZIPport Panel Interface Connectors is a bulkhead connector product family referenced for electrical equipment layout.","Reserve front and rear connector bodies, locking hardware and cable bends. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect ZIPport Panel Interface Connectors from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve front and rear connector bodies, locking hardware and cable bends.","A connector face outline does not describe pin assignment or electrical capability."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve front and rear connector bodies, locking hardware and cable bends.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A connector face outline does not describe pin assignment or electrical capability.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"ZIPport Panel Interface Connectors"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-bulkhead-connector","terminal-strip"],"artwork":"edu-object-automationdirect-zipport-panel-interface-connectors","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-zipport-panel-interface-connectors","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-zipport-panel-interface-connectors.svg"},{"slug":"automationdirect-gladiator-cfs-disconnects","name":"AutomationDirect Gladiator CFS disconnects","kind":"object","abbreviation":"Gladiator CFS disconnects","aliases":["Gladiator CFS disconnects","Gladiator CFS disconnects CAD","Gladiator CFS disconnects general arrangement","Gladiator CFS disconnects panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect Gladiator CFS disconnects is a fuse-switch disconnector product family referenced for electrical equipment layout.","description":["AutomationDirect Gladiator CFS disconnects is a fuse-switch disconnector product family referenced for electrical equipment layout.","Reserve access for fuse replacement and identify whether conductors enter above, below or at the side. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect Gladiator CFS disconnects from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve access for fuse replacement and identify whether conductors enter above, below or at the side.","The fuse carrier operating space can extend beyond the closed device body."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve access for fuse replacement and identify whether conductors enter above, below or at the side.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The fuse carrier operating space can extend beyond the closed device body.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"Gladiator CFS disconnects"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-fuse-switch-disconnector","switchboard"],"artwork":"edu-object-automationdirect-gladiator-cfs-disconnects","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-gladiator-cfs-disconnects","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-gladiator-cfs-disconnects.svg"},{"slug":"automationdirect-wmzt-miniature-circuit-breakers","name":"AutomationDirect WMZT miniature circuit breakers","kind":"object","abbreviation":"WMZT miniature circuit breakers","aliases":["WMZT miniature circuit breakers","WMZT miniature circuit breakers CAD","WMZT miniature circuit breakers general arrangement","WMZT miniature circuit breakers panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect WMZT miniature circuit breakers is a miniature circuit breaker product family referenced for electrical equipment layout.","description":["AutomationDirect WMZT miniature circuit breakers is a miniature circuit breaker product family referenced for electrical equipment layout.","Allow space for the actual number of poles, associated auxiliaries and supply comb connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect WMZT miniature circuit breakers from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Allow space for the actual number of poles, associated auxiliaries and supply comb connections.","A module-count sketch is a planning aid; an exact footprint depends on product series and pole configuration."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Allow space for the actual number of poles, associated auxiliaries and supply comb connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A module-count sketch is a planning aid; an exact footprint depends on product series and pole configuration.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"WMZT miniature circuit breakers"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-miniature-circuit-breaker","switchboard"],"artwork":"edu-object-automationdirect-wmzt-miniature-circuit-breakers","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-wmzt-miniature-circuit-breakers","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-wmzt-miniature-circuit-breakers.svg"},{"slug":"automationdirect-edison-class-t-fuses","name":"AutomationDirect Edison Class T fuses","kind":"object","abbreviation":"Edison Class T fuses","aliases":["Edison Class T fuses","Edison Class T fuses CAD","Edison Class T fuses general arrangement","Edison Class T fuses panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect Edison Class T fuses is a fuse holder product family referenced for electrical equipment layout.","description":["AutomationDirect Edison Class T fuses is a fuse holder product family referenced for electrical equipment layout.","Account for insertion and removal space as well as terminal access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect Edison Class T fuses from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Account for insertion and removal space as well as terminal access.","The fuse element, holder and complete switch-fuse assembly are distinct scheduled items."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Account for insertion and removal space as well as terminal access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The fuse element, holder and complete switch-fuse assembly are distinct scheduled items.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"Edison Class T fuses"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-fuse-holder","switchboard"],"artwork":"edu-object-automationdirect-edison-class-t-fuses","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-edison-class-t-fuses","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-edison-class-t-fuses.svg"},{"slug":"automationdirect-edison-power-distribution-blocks","name":"AutomationDirect Edison Power Distribution Blocks","kind":"object","abbreviation":"Edison Power Distribution Blocks","aliases":["Edison Power Distribution Blocks","Edison Power Distribution Blocks CAD","Edison Power Distribution Blocks general arrangement","Edison Power Distribution Blocks panel layout"],"category":"connections-wiring","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect Edison Power Distribution Blocks is a distribution terminal block product family referenced for electrical equipment layout.","description":["AutomationDirect Edison Power Distribution Blocks is a distribution terminal block product family referenced for electrical equipment layout.","Coordinate incoming conductor size, outgoing routes and protection references. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect Edison Power Distribution Blocks from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate incoming conductor size, outgoing routes and protection references.","The number of outlets does not establish equal current capacity or permitted circuit grouping."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate incoming conductor size, outgoing routes and protection references.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The number of outlets does not establish equal current capacity or permitted circuit grouping.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"Edison Power Distribution Blocks"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-distribution-terminal-block","terminal-strip"],"artwork":"edu-object-automationdirect-edison-power-distribution-blocks","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-edison-power-distribution-blocks","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-edison-power-distribution-blocks.svg"},{"slug":"automationdirect-stride-vpn","name":"AutomationDirect Stride VPN","kind":"object","abbreviation":"Stride VPN","aliases":["Stride VPN","Stride VPN CAD","Stride VPN general arrangement","Stride VPN panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect Stride VPN is a industrial vpn router product family referenced for electrical equipment layout.","description":["AutomationDirect Stride VPN is a industrial vpn router product family referenced for electrical equipment layout.","Coordinate antenna or network connections, supply and segregation boundaries. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect Stride VPN from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate antenna or network connections, supply and segregation boundaries.","Physical placement does not establish cybersecurity configuration or permission to connect a plant."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate antenna or network connections, supply and segregation boundaries.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Physical placement does not establish cybersecurity configuration or permission to connect a plant.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"Stride VPN"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-industrial-vpn-router","switchboard"],"artwork":"edu-object-automationdirect-stride-vpn","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-stride-vpn","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-stride-vpn.svg"},{"slug":"automationdirect-acuamp","name":"AutomationDirect AcuAmp","kind":"object","abbreviation":"AcuAmp","aliases":["AcuAmp","AcuAmp CAD","AcuAmp general arrangement","AcuAmp panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"AutomationDirect AcuAmp is a signal conditioner product family referenced for electrical equipment layout.","description":["AutomationDirect AcuAmp is a signal conditioner product family referenced for electrical equipment layout.","Coordinate input/output ranges, supply and shielding in separate terminal groups. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies AutomationDirect AcuAmp from the official public resource. Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate input/output ranges, supply and shielding in separate terminal groups.","Signal conditioning does not replace a protection relay unless that duty is explicitly specified."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate input/output ranges, supply and shielding in separate terminal groups.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Signal conditioning does not replace a protection relay unless that duty is explicitly specified.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"AutomationDirect"},{"label":"Published family / model","value":"AcuAmp"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official supplier product-line listing. Select the actual part number; the family CAD archive can contain multiple sizes and historical revisions."}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-signal-conditioner","switchboard"],"artwork":"edu-object-automationdirect-acuamp","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/automationdirect-acuamp","illustration":"https://eloragrid.ai/library/illustrations/automationdirect-acuamp.svg"},{"slug":"fuji-electric-bm3-manual-motor-starters","name":"Fuji Electric BM3 manual motor starters","kind":"object","abbreviation":"BM3 manual motor starters","aliases":["BM3 manual motor starters","BM3 manual motor starters CAD","BM3 manual motor starters general arrangement","BM3 manual motor starters panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Fuji Electric BM3 manual motor starters is a motor-protection circuit breaker product family referenced for electrical equipment layout.","description":["Fuji Electric BM3 manual motor starters is a motor-protection circuit breaker product family referenced for electrical equipment layout.","Position beside its coordinated contactor where the selected assembly requires that arrangement. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Fuji Electric BM3 manual motor starters from the official public resource. Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Position beside its coordinated contactor where the selected assembly requires that arrangement.","A motor feeder also needs a documented starter combination and coordination study; the device outline is insufficient."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Position beside its coordinated contactor where the selected assembly requires that arrangement.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A motor feeder also needs a documented starter combination and coordination study; the device outline is insufficient.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Fuji Electric"},{"label":"Published family / model","value":"BM3 manual motor starters"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant."}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-motor-protection-circuit-breaker","switchboard"],"artwork":"edu-object-fuji-electric-bm3-manual-motor-starters","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/fuji-electric-bm3-manual-motor-starters","illustration":"https://eloragrid.ai/library/illustrations/fuji-electric-bm3-manual-motor-starters.svg"},{"slug":"fuji-electric-sc-contactors-and-thermal-overload-relays","name":"Fuji Electric SC contactors and thermal overload relays","kind":"object","abbreviation":"GA","aliases":["SC contactors and thermal overload relays","SC contactors and thermal overload relays CAD","SC contactors and thermal overload relays general arrangement","SC contactors and thermal overload relays panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Fuji Electric SC contactors and thermal overload relays is a power contactor product family referenced for electrical equipment layout.","description":["Fuji Electric SC contactors and thermal overload relays is a power contactor product family referenced for electrical equipment layout.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Fuji Electric SC contactors and thermal overload relays from the official public resource. Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","A contactor requires separate protection and its operational rating depends on the load duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A contactor requires separate protection and its operational rating depends on the load duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Fuji Electric"},{"label":"Published family / model","value":"SC contactors and thermal overload relays"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant."}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-power-contactor","switchboard"],"artwork":"edu-object-fuji-electric-sc-contactors-and-thermal-overload-relays","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/fuji-electric-sc-contactors-and-thermal-overload-relays","illustration":"https://eloragrid.ai/library/illustrations/fuji-electric-sc-contactors-and-thermal-overload-relays.svg"},{"slug":"fuji-electric-sc-next-contactors","name":"Fuji Electric SC-NEXT contactors","kind":"object","abbreviation":"SC-NEXT contactors","aliases":["SC-NEXT contactors","SC-NEXT contactors CAD","SC-NEXT contactors general arrangement","SC-NEXT contactors panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Fuji Electric SC-NEXT contactors is a power contactor product family referenced for electrical equipment layout.","description":["Fuji Electric SC-NEXT contactors is a power contactor product family referenced for electrical equipment layout.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Fuji Electric SC-NEXT contactors from the official public resource. Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","A contactor requires separate protection and its operational rating depends on the load duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A contactor requires separate protection and its operational rating depends on the load duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Fuji Electric"},{"label":"Published family / model","value":"SC-NEXT contactors"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant."}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-power-contactor","switchboard"],"artwork":"edu-object-fuji-electric-sc-next-contactors","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/fuji-electric-sc-next-contactors","illustration":"https://eloragrid.ai/library/illustrations/fuji-electric-sc-next-contactors.svg"},{"slug":"fuji-electric-orange-line-odyssey-contactors","name":"Fuji Electric Orange Line / Odyssey contactors","kind":"object","abbreviation":"Orange Line / Odyssey contactors","aliases":["Orange Line / Odyssey contactors","Orange Line / Odyssey contactors CAD","Orange Line / Odyssey contactors general arrangement","Orange Line / Odyssey contactors panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Fuji Electric Orange Line / Odyssey contactors is a power contactor product family referenced for electrical equipment layout.","description":["Fuji Electric Orange Line / Odyssey contactors is a power contactor product family referenced for electrical equipment layout.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Fuji Electric Orange Line / Odyssey contactors from the official public resource. Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","A contactor requires separate protection and its operational rating depends on the load duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A contactor requires separate protection and its operational rating depends on the load duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Fuji Electric"},{"label":"Published family / model","value":"Orange Line / Odyssey contactors"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant."}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-power-contactor","switchboard"],"artwork":"edu-object-fuji-electric-orange-line-odyssey-contactors","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/fuji-electric-orange-line-odyssey-contactors","illustration":"https://eloragrid.ai/library/illustrations/fuji-electric-orange-line-odyssey-contactors.svg"},{"slug":"fuji-electric-combination-starters","name":"Fuji Electric Combination starters","kind":"object","abbreviation":"Combination starters","aliases":["Combination starters","Combination starters CAD","Combination starters general arrangement","Combination starters panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Fuji Electric Combination starters is a power contactor product family referenced for electrical equipment layout.","description":["Fuji Electric Combination starters is a power contactor product family referenced for electrical equipment layout.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Fuji Electric Combination starters from the official public resource. Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","A contactor requires separate protection and its operational rating depends on the load duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A contactor requires separate protection and its operational rating depends on the load duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Fuji Electric"},{"label":"Published family / model","value":"Combination starters"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant."}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-power-contactor","switchboard"],"artwork":"edu-object-fuji-electric-combination-starters","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/fuji-electric-combination-starters","illustration":"https://eloragrid.ai/library/illustrations/fuji-electric-combination-starters.svg"},{"slug":"fuji-electric-g-twin-lambda-circuit-breakers","name":"Fuji Electric G-Twin Lambda circuit breakers","kind":"object","abbreviation":"G-Twin Lambda circuit breakers","aliases":["G-Twin Lambda circuit breakers","G-Twin Lambda circuit breakers CAD","G-Twin Lambda circuit breakers general arrangement","G-Twin Lambda circuit breakers panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Fuji Electric G-Twin Lambda circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout.","description":["Fuji Electric G-Twin Lambda circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Fuji Electric G-Twin Lambda circuit breakers from the official public resource. Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Fuji Electric"},{"label":"Published family / model","value":"G-Twin Lambda circuit breakers"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant."}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-moulded-case-circuit-breaker","switchboard"],"artwork":"edu-object-fuji-electric-g-twin-lambda-circuit-breakers","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/fuji-electric-g-twin-lambda-circuit-breakers","illustration":"https://eloragrid.ai/library/illustrations/fuji-electric-g-twin-lambda-circuit-breakers.svg"},{"slug":"fuji-electric-g-twin-circuit-breakers","name":"Fuji Electric G-Twin circuit breakers","kind":"object","abbreviation":"G-Twin circuit breakers","aliases":["G-Twin circuit breakers","G-Twin circuit breakers CAD","G-Twin circuit breakers general arrangement","G-Twin circuit breakers panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Fuji Electric G-Twin circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout.","description":["Fuji Electric G-Twin circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Fuji Electric G-Twin circuit breakers from the official public resource. Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Fuji Electric"},{"label":"Published family / model","value":"G-Twin circuit breakers"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant."}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-moulded-case-circuit-breaker","switchboard"],"artwork":"edu-object-fuji-electric-g-twin-circuit-breakers","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/fuji-electric-g-twin-circuit-breakers","illustration":"https://eloragrid.ai/library/illustrations/fuji-electric-g-twin-circuit-breakers.svg"},{"slug":"fuji-electric-ea-ul-sa-ul-circuit-breakers","name":"Fuji Electric EA-UL / SA-UL circuit breakers","kind":"object","abbreviation":"EA-UL / SA-UL circuit breakers","aliases":["EA-UL / SA-UL circuit breakers","EA-UL / SA-UL circuit breakers CAD","EA-UL / SA-UL circuit breakers general arrangement","EA-UL / SA-UL circuit breakers panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Fuji Electric EA-UL / SA-UL circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout.","description":["Fuji Electric EA-UL / SA-UL circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Fuji Electric EA-UL / SA-UL circuit breakers from the official public resource. Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Fuji Electric"},{"label":"Published family / model","value":"EA-UL / SA-UL circuit breakers"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant."}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-moulded-case-circuit-breaker","switchboard"],"artwork":"edu-object-fuji-electric-ea-ul-sa-ul-circuit-breakers","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/fuji-electric-ea-ul-sa-ul-circuit-breakers","illustration":"https://eloragrid.ai/library/illustrations/fuji-electric-ea-ul-sa-ul-circuit-breakers.svg"},{"slug":"fuji-electric-eg-ul-sg-ul-circuit-breakers","name":"Fuji Electric EG-UL / SG-UL circuit breakers","kind":"object","abbreviation":"EG-UL / SG-UL circuit breakers","aliases":["EG-UL / SG-UL circuit breakers","EG-UL / SG-UL circuit breakers CAD","EG-UL / SG-UL circuit breakers general arrangement","EG-UL / SG-UL circuit breakers panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Fuji Electric EG-UL / SG-UL circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout.","description":["Fuji Electric EG-UL / SG-UL circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Fuji Electric EG-UL / SG-UL circuit breakers from the official public resource. Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Fuji Electric"},{"label":"Published family / model","value":"EG-UL / SG-UL circuit breakers"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant."}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-moulded-case-circuit-breaker","switchboard"],"artwork":"edu-object-fuji-electric-eg-ul-sg-ul-circuit-breakers","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/fuji-electric-eg-ul-sg-ul-circuit-breakers","illustration":"https://eloragrid.ai/library/illustrations/fuji-electric-eg-ul-sg-ul-circuit-breakers.svg"},{"slug":"fuji-electric-sk-contactors-and-relays","name":"Fuji Electric SK contactors and relays","kind":"object","abbreviation":"SK contactors and relays","aliases":["SK contactors and relays","SK contactors and relays CAD","SK contactors and relays general arrangement","SK contactors and relays panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Fuji Electric SK contactors and relays is a power contactor product family referenced for electrical equipment layout.","description":["Fuji Electric SK contactors and relays is a power contactor product family referenced for electrical equipment layout.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Fuji Electric SK contactors and relays from the official public resource. Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","A contactor requires separate protection and its operational rating depends on the load duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A contactor requires separate protection and its operational rating depends on the load duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Fuji Electric"},{"label":"Published family / model","value":"SK contactors and relays"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Americas public CAD collection. Confirm the complete model suffix, pole count, auxiliary devices and mounting variant."}],"references":[{"sourceId":"pub-object-fuji-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-power-contactor","switchboard"],"artwork":"edu-object-fuji-electric-sk-contactors-and-relays","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/fuji-electric-sk-contactors-and-relays","illustration":"https://eloragrid.ai/library/illustrations/fuji-electric-sk-contactors-and-relays.svg"},{"slug":"tdk-lambda-d1se120-xx-a3","name":"TDK-Lambda D1SE120-xx-A3","kind":"object","abbreviation":"D1SE120-xx-A3","aliases":["D1SE120-xx-A3","D1SE120-xx-A3 CAD","D1SE120-xx-A3 general arrangement","D1SE120-xx-A3 panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"TDK-Lambda D1SE120-xx-A3 is a din-rail ac/dc power supply product family referenced for electrical equipment layout.","description":["TDK-Lambda D1SE120-xx-A3 is a din-rail ac/dc power supply product family referenced for electrical equipment layout.","Leave the selected mounting and cooling space and provide accessible input/output terminals. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies TDK-Lambda D1SE120-xx-A3 from the official public resource. The official mechanical catalogue uses xx for an output-variant group; this entry does not certify the 24 V suffix or any single output variant.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Leave the selected mounting and cooling space and provide accessible input/output terminals.","Its nominal output rating does not guarantee sufficient headroom for every load or transient."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Leave the selected mounting and cooling space and provide accessible input/output terminals.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its nominal output rating does not guarantee sufficient headroom for every load or transient.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"TDK-Lambda"},{"label":"Published family / model","value":"D1SE120-xx-A3"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"The official mechanical catalogue uses xx for an output-variant group; this entry does not certify the 24 V suffix or any single output variant."}],"references":[{"sourceId":"pub-object-tdk-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."},{"sourceId":"pub-object-tdk-din","relevance":"Official functional classification of the power-supply, buffer, redundancy and UPS families."}],"related":["ga-din-rail-ac-dc-power-supply","switchboard"],"artwork":"edu-object-tdk-lambda-d1se120-xx-a3","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/tdk-lambda-d1se120-xx-a3","illustration":"https://eloragrid.ai/library/illustrations/tdk-lambda-d1se120-xx-a3.svg"},{"slug":"tdk-lambda-d1se240-xx-a3","name":"TDK-Lambda D1SE240-xx-A3","kind":"object","abbreviation":"D1SE240-xx-A3","aliases":["D1SE240-xx-A3","D1SE240-xx-A3 CAD","D1SE240-xx-A3 general arrangement","D1SE240-xx-A3 panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"TDK-Lambda D1SE240-xx-A3 is a din-rail ac/dc power supply product family referenced for electrical equipment layout.","description":["TDK-Lambda D1SE240-xx-A3 is a din-rail ac/dc power supply product family referenced for electrical equipment layout.","Leave the selected mounting and cooling space and provide accessible input/output terminals. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies TDK-Lambda D1SE240-xx-A3 from the official public resource. The official mechanical catalogue uses xx for an output-variant group; this entry does not certify the 24 V suffix or any single output variant.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Leave the selected mounting and cooling space and provide accessible input/output terminals.","Its nominal output rating does not guarantee sufficient headroom for every load or transient."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Leave the selected mounting and cooling space and provide accessible input/output terminals.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its nominal output rating does not guarantee sufficient headroom for every load or transient.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"TDK-Lambda"},{"label":"Published family / model","value":"D1SE240-xx-A3"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"The official mechanical catalogue uses xx for an output-variant group; this entry does not certify the 24 V suffix or any single output variant."}],"references":[{"sourceId":"pub-object-tdk-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."},{"sourceId":"pub-object-tdk-din","relevance":"Official functional classification of the power-supply, buffer, redundancy and UPS families."}],"related":["ga-din-rail-ac-dc-power-supply","switchboard"],"artwork":"edu-object-tdk-lambda-d1se240-xx-a3","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/tdk-lambda-d1se240-xx-a3","illustration":"https://eloragrid.ai/library/illustrations/tdk-lambda-d1se240-xx-a3.svg"},{"slug":"tdk-lambda-d1se480-xx-a3","name":"TDK-Lambda D1SE480-xx-A3","kind":"object","abbreviation":"D1SE480-xx-A3","aliases":["D1SE480-xx-A3","D1SE480-xx-A3 CAD","D1SE480-xx-A3 general arrangement","D1SE480-xx-A3 panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"TDK-Lambda D1SE480-xx-A3 is a din-rail ac/dc power supply product family referenced for electrical equipment layout.","description":["TDK-Lambda D1SE480-xx-A3 is a din-rail ac/dc power supply product family referenced for electrical equipment layout.","Leave the selected mounting and cooling space and provide accessible input/output terminals. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies TDK-Lambda D1SE480-xx-A3 from the official public resource. The official mechanical catalogue uses xx for an output-variant group; this entry does not certify the 24 V suffix or any single output variant.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Leave the selected mounting and cooling space and provide accessible input/output terminals.","Its nominal output rating does not guarantee sufficient headroom for every load or transient."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Leave the selected mounting and cooling space and provide accessible input/output terminals.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its nominal output rating does not guarantee sufficient headroom for every load or transient.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"TDK-Lambda"},{"label":"Published family / model","value":"D1SE480-xx-A3"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"The official mechanical catalogue uses xx for an output-variant group; this entry does not certify the 24 V suffix or any single output variant."}],"references":[{"sourceId":"pub-object-tdk-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."},{"sourceId":"pub-object-tdk-din","relevance":"Official functional classification of the power-supply, buffer, redundancy and UPS families."}],"related":["ga-din-rail-ac-dc-power-supply","switchboard"],"artwork":"edu-object-tdk-lambda-d1se480-xx-a3","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/tdk-lambda-d1se480-xx-a3","illustration":"https://eloragrid.ai/library/illustrations/tdk-lambda-d1se480-xx-a3.svg"},{"slug":"tdk-lambda-dbm20","name":"TDK-Lambda DBM20","kind":"object","abbreviation":"DBM20","aliases":["DBM20","DBM20 CAD","DBM20 general arrangement","DBM20 panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"TDK-Lambda DBM20 is a dc buffer module model referenced for electrical equipment layout.","description":["TDK-Lambda DBM20 is a dc buffer module model referenced for electrical equipment layout.","Locate its bus terminals and identify associated protection and status signals. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies TDK-Lambda DBM20 from the official public resource. Official mechanical catalogue identifier. Check the full electrical part number and option suffix before selecting its outline.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Locate its bus terminals and identify associated protection and status signals.","A buffer module and a battery-backed UPS provide different storage and autonomy arrangements."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Locate its bus terminals and identify associated protection and status signals.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A buffer module and a battery-backed UPS provide different storage and autonomy arrangements.","facts":[{"label":"Record type","value":"Manufacturer model"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"TDK-Lambda"},{"label":"Published family / model","value":"DBM20"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official mechanical catalogue identifier. Check the full electrical part number and option suffix before selecting its outline."}],"references":[{"sourceId":"pub-object-tdk-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."},{"sourceId":"pub-object-tdk-din","relevance":"Official functional classification of the power-supply, buffer, redundancy and UPS families."}],"related":["ga-dc-buffer-module","switchboard"],"artwork":"edu-object-tdk-lambda-dbm20","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/tdk-lambda-dbm20","illustration":"https://eloragrid.ai/library/illustrations/tdk-lambda-dbm20.svg"},{"slug":"tdk-lambda-drb15","name":"TDK-Lambda DRB15","kind":"object","abbreviation":"DRB15","aliases":["DRB15","DRB15 CAD","DRB15 general arrangement","DRB15 panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"TDK-Lambda DRB15 is a din-rail ac/dc power supply model referenced for electrical equipment layout.","description":["TDK-Lambda DRB15 is a din-rail ac/dc power supply model referenced for electrical equipment layout.","Leave the selected mounting and cooling space and provide accessible input/output terminals. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies TDK-Lambda DRB15 from the official public resource. Official mechanical catalogue identifier. Check the full electrical part number and option suffix before selecting its outline.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Leave the selected mounting and cooling space and provide accessible input/output terminals.","Its nominal output rating does not guarantee sufficient headroom for every load or transient."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Leave the selected mounting and cooling space and provide accessible input/output terminals.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its nominal output rating does not guarantee sufficient headroom for every load or transient.","facts":[{"label":"Record type","value":"Manufacturer model"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"TDK-Lambda"},{"label":"Published family / model","value":"DRB15"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official mechanical catalogue identifier. Check the full electrical part number and option suffix before selecting its outline."}],"references":[{"sourceId":"pub-object-tdk-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."},{"sourceId":"pub-object-tdk-din","relevance":"Official functional classification of the power-supply, buffer, redundancy and UPS families."}],"related":["ga-din-rail-ac-dc-power-supply","switchboard"],"artwork":"edu-object-tdk-lambda-drb15","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/tdk-lambda-drb15","illustration":"https://eloragrid.ai/library/illustrations/tdk-lambda-drb15.svg"},{"slug":"tdk-lambda-drb30","name":"TDK-Lambda DRB30","kind":"object","abbreviation":"DRB30","aliases":["DRB30","DRB30 CAD","DRB30 general arrangement","DRB30 panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"TDK-Lambda DRB30 is a din-rail ac/dc power supply model referenced for electrical equipment layout.","description":["TDK-Lambda DRB30 is a din-rail ac/dc power supply model referenced for electrical equipment layout.","Leave the selected mounting and cooling space and provide accessible input/output terminals. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies TDK-Lambda DRB30 from the official public resource. Official mechanical catalogue identifier. Check the full electrical part number and option suffix before selecting its outline.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Leave the selected mounting and cooling space and provide accessible input/output terminals.","Its nominal output rating does not guarantee sufficient headroom for every load or transient."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Leave the selected mounting and cooling space and provide accessible input/output terminals.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its nominal output rating does not guarantee sufficient headroom for every load or transient.","facts":[{"label":"Record type","value":"Manufacturer model"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"TDK-Lambda"},{"label":"Published family / model","value":"DRB30"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official mechanical catalogue identifier. Check the full electrical part number and option suffix before selecting its outline."}],"references":[{"sourceId":"pub-object-tdk-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."},{"sourceId":"pub-object-tdk-din","relevance":"Official functional classification of the power-supply, buffer, redundancy and UPS families."}],"related":["ga-din-rail-ac-dc-power-supply","switchboard"],"artwork":"edu-object-tdk-lambda-drb30","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/tdk-lambda-drb30","illustration":"https://eloragrid.ai/library/illustrations/tdk-lambda-drb30.svg"},{"slug":"tdk-lambda-drb480","name":"TDK-Lambda DRB480","kind":"object","abbreviation":"DRB480","aliases":["DRB480","DRB480 CAD","DRB480 general arrangement","DRB480 panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"TDK-Lambda DRB480 is a din-rail ac/dc power supply model referenced for electrical equipment layout.","description":["TDK-Lambda DRB480 is a din-rail ac/dc power supply model referenced for electrical equipment layout.","Leave the selected mounting and cooling space and provide accessible input/output terminals. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies TDK-Lambda DRB480 from the official public resource. Official mechanical catalogue identifier. Check the full electrical part number and option suffix before selecting its outline.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Leave the selected mounting and cooling space and provide accessible input/output terminals.","Its nominal output rating does not guarantee sufficient headroom for every load or transient."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Leave the selected mounting and cooling space and provide accessible input/output terminals.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its nominal output rating does not guarantee sufficient headroom for every load or transient.","facts":[{"label":"Record type","value":"Manufacturer model"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"TDK-Lambda"},{"label":"Published family / model","value":"DRB480"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official mechanical catalogue identifier. Check the full electrical part number and option suffix before selecting its outline."}],"references":[{"sourceId":"pub-object-tdk-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."},{"sourceId":"pub-object-tdk-din","relevance":"Official functional classification of the power-supply, buffer, redundancy and UPS families."}],"related":["ga-din-rail-ac-dc-power-supply","switchboard"],"artwork":"edu-object-tdk-lambda-drb480","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/tdk-lambda-drb480","illustration":"https://eloragrid.ai/library/illustrations/tdk-lambda-drb480.svg"},{"slug":"tdk-lambda-drf960","name":"TDK-Lambda DRF960","kind":"object","abbreviation":"DRF960","aliases":["DRF960","DRF960 CAD","DRF960 general arrangement","DRF960 panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"TDK-Lambda DRF960 is a din-rail ac/dc power supply model referenced for electrical equipment layout.","description":["TDK-Lambda DRF960 is a din-rail ac/dc power supply model referenced for electrical equipment layout.","Leave the selected mounting and cooling space and provide accessible input/output terminals. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies TDK-Lambda DRF960 from the official public resource. Official mechanical catalogue identifier. Check the full electrical part number and option suffix before selecting its outline.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Leave the selected mounting and cooling space and provide accessible input/output terminals.","Its nominal output rating does not guarantee sufficient headroom for every load or transient."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Leave the selected mounting and cooling space and provide accessible input/output terminals.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its nominal output rating does not guarantee sufficient headroom for every load or transient.","facts":[{"label":"Record type","value":"Manufacturer model"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"TDK-Lambda"},{"label":"Published family / model","value":"DRF960"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official mechanical catalogue identifier. Check the full electrical part number and option suffix before selecting its outline."}],"references":[{"sourceId":"pub-object-tdk-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."},{"sourceId":"pub-object-tdk-din","relevance":"Official functional classification of the power-supply, buffer, redundancy and UPS families."}],"related":["ga-din-rail-ac-dc-power-supply","switchboard"],"artwork":"edu-object-tdk-lambda-drf960","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/tdk-lambda-drf960","illustration":"https://eloragrid.ai/library/illustrations/tdk-lambda-drf960.svg"},{"slug":"tdk-lambda-drm40","name":"TDK-Lambda DRM40","kind":"object","abbreviation":"DRM40","aliases":["DRM40","DRM40 CAD","DRM40 general arrangement","DRM40 panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"TDK-Lambda DRM40 is a dc redundancy module model referenced for electrical equipment layout.","description":["TDK-Lambda DRM40 is a dc redundancy module model referenced for electrical equipment layout.","Draw the separate supply feeds and output wiring while reserving the selected thermal clearance. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies TDK-Lambda DRM40 from the official public resource. Official mechanical catalogue identifier. Check the full electrical part number and option suffix before selecting its outline.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Draw the separate supply feeds and output wiring while reserving the selected thermal clearance.","Parallel supplies do not automatically form a documented redundant system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Draw the separate supply feeds and output wiring while reserving the selected thermal clearance.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Parallel supplies do not automatically form a documented redundant system.","facts":[{"label":"Record type","value":"Manufacturer model"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"TDK-Lambda"},{"label":"Published family / model","value":"DRM40"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official mechanical catalogue identifier. Check the full electrical part number and option suffix before selecting its outline."}],"references":[{"sourceId":"pub-object-tdk-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."},{"sourceId":"pub-object-tdk-din","relevance":"Official functional classification of the power-supply, buffer, redundancy and UPS families."}],"related":["ga-dc-redundancy-module","switchboard"],"artwork":"edu-object-tdk-lambda-drm40","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/tdk-lambda-drm40","illustration":"https://eloragrid.ai/library/illustrations/tdk-lambda-drm40.svg"},{"slug":"tdk-lambda-dush960-1248-1m","name":"TDK-Lambda DUSH960-1248-1M","kind":"object","abbreviation":"DUSH960-1248-1M","aliases":["DUSH960-1248-1M","DUSH960-1248-1M CAD","DUSH960-1248-1M general arrangement","DUSH960-1248-1M panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"TDK-Lambda DUSH960-1248-1M is a dc ups module model referenced for electrical equipment layout.","description":["TDK-Lambda DUSH960-1248-1M is a dc ups module model referenced for electrical equipment layout.","Reserve the controller and storage-module zones and cross-reference alarm wiring. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies TDK-Lambda DUSH960-1248-1M from the official public resource. Official mechanical catalogue identifier. Check the full electrical part number and option suffix before selecting its outline.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve the controller and storage-module zones and cross-reference alarm wiring.","The controller outline alone does not include external batteries or their maintenance space."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve the controller and storage-module zones and cross-reference alarm wiring.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The controller outline alone does not include external batteries or their maintenance space.","facts":[{"label":"Record type","value":"Manufacturer model"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"TDK-Lambda"},{"label":"Published family / model","value":"DUSH960-1248-1M"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official mechanical catalogue identifier. Check the full electrical part number and option suffix before selecting its outline."}],"references":[{"sourceId":"pub-object-tdk-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."},{"sourceId":"pub-object-tdk-din","relevance":"Official functional classification of the power-supply, buffer, redundancy and UPS families."}],"related":["ga-dc-ups-module","switchboard"],"artwork":"edu-object-tdk-lambda-dush960-1248-1m","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/tdk-lambda-dush960-1248-1m","illustration":"https://eloragrid.ai/library/illustrations/tdk-lambda-dush960-1248-1m.svg"},{"slug":"puls-qs20-241","name":"PULS QS20.241","kind":"object","abbreviation":"QS20.241","aliases":["QS20.241","QS20.241 CAD","QS20.241 general arrangement","QS20.241 panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"PULS QS20.241 is a din-rail ac/dc power supply model referenced for electrical equipment layout.","description":["PULS QS20.241 is a din-rail ac/dc power supply model referenced for electrical equipment layout.","Leave the selected mounting and cooling space and provide accessible input/output terminals. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies PULS QS20.241 from the official public resource. Official model identity; consult the data sheet and mechanical drawing for the selected mounting and installation conditions.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Leave the selected mounting and cooling space and provide accessible input/output terminals.","Its nominal output rating does not guarantee sufficient headroom for every load or transient."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Leave the selected mounting and cooling space and provide accessible input/output terminals.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its nominal output rating does not guarantee sufficient headroom for every load or transient.","facts":[{"label":"Record type","value":"Manufacturer model"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"PULS"},{"label":"Published family / model","value":"QS20.241"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official model identity; consult the data sheet and mechanical drawing for the selected mounting and installation conditions."}],"references":[{"sourceId":"pub-object-puls-qs","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-din-rail-ac-dc-power-supply","switchboard"],"artwork":"edu-object-puls-qs20-241","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/puls-qs20-241","illustration":"https://eloragrid.ai/library/illustrations/puls-qs20-241.svg"},{"slug":"terasaki-tempower-at-air-circuit-breakers","name":"Terasaki TemPower AT air circuit breakers","kind":"object","abbreviation":"TemPower AT air circuit breakers","aliases":["TemPower AT air circuit breakers","TemPower AT air circuit breakers CAD","TemPower AT air circuit breakers general arrangement","TemPower AT air circuit breakers panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Terasaki TemPower AT air circuit breakers is a air circuit breaker product family referenced for electrical equipment layout.","description":["Terasaki TemPower AT air circuit breakers is a air circuit breaker product family referenced for electrical equipment layout.","Reserve the breaker body, terminals, operating controls and any withdrawal travel. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Terasaki TemPower AT air circuit breakers from the official public resource. Select the AT model, number of poles and fixed or withdrawable installation before using the outline.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve the breaker body, terminals, operating controls and any withdrawal travel.","A fixed breaker envelope and a withdrawable breaker plus cradle require different installation space."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve the breaker body, terminals, operating controls and any withdrawal travel.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fixed breaker envelope and a withdrawable breaker plus cradle require different installation space.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Terasaki"},{"label":"Published family / model","value":"TemPower AT air circuit breakers"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Select the AT model, number of poles and fixed or withdrawable installation before using the outline."}],"references":[{"sourceId":"pub-object-tempower","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-air-circuit-breaker","switchboard"],"artwork":"edu-object-terasaki-tempower-at-air-circuit-breakers","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/terasaki-tempower-at-air-circuit-breakers","illustration":"https://eloragrid.ai/library/illustrations/terasaki-tempower-at-air-circuit-breakers.svg"},{"slug":"terasaki-nhp-tembreak-1-legacy-mccbs","name":"Terasaki / NHP TemBreak 1 legacy MCCBs","kind":"object","abbreviation":"TemBreak 1 legacy MCCBs","aliases":["TemBreak 1 legacy MCCBs","TemBreak 1 legacy MCCBs CAD","TemBreak 1 legacy MCCBs general arrangement","TemBreak 1 legacy MCCBs panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Terasaki / NHP TemBreak 1 legacy MCCBs is a moulded-case circuit breaker product family referenced for electrical equipment layout.","description":["Terasaki / NHP TemBreak 1 legacy MCCBs is a moulded-case circuit breaker product family referenced for electrical equipment layout.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Terasaki / NHP TemBreak 1 legacy MCCBs from the official public resource. Legacy Australian supplier listing. Product availability and replacement suitability require confirmation; family attachments do not identify one universal footprint.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Terasaki / NHP"},{"label":"Published family / model","value":"TemBreak 1 legacy MCCBs"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Legacy Australian supplier listing. Product availability and replacement suitability require confirmation; family attachments do not identify one universal footprint."}],"references":[{"sourceId":"pub-object-nhp-tembreak","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-moulded-case-circuit-breaker","switchboard"],"artwork":"edu-object-terasaki-nhp-tembreak-1-legacy-mccbs","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/terasaki-nhp-tembreak-1-legacy-mccbs","illustration":"https://eloragrid.ai/library/illustrations/terasaki-nhp-tembreak-1-legacy-mccbs.svg"},{"slug":"schneider-electric-micom-protection-relays","name":"Schneider Electric MiCOM protection relays","kind":"object","abbreviation":"MiCOM protection relays","aliases":["MiCOM protection relays","MiCOM protection relays CAD","MiCOM protection relays general arrangement","MiCOM protection relays panel layout"],"category":"measurement-protection","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric MiCOM protection relays is a protection relay ied product family referenced for electrical equipment layout.","description":["Schneider Electric MiCOM protection relays is a protection relay ied product family referenced for electrical equipment layout.","Coordinate the case cut-out, rear terminal depth, communications and test access. The GA locates the physical item; the schematic or schedule records its interfaces.","This record identifies Schneider Electric MiCOM protection relays from the official public resource. This is the relay device family rather than the complete relay panel. The CAD collection contains multiple relay ranges; choose the exact case size, terminal arrangement and revision.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate the case cut-out, rear terminal depth, communications and test access.","Relay case size does not determine the enabled protection functions or settings."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate the case cut-out, rear terminal depth, communications and test access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Relay case size does not determine the enabled protection functions or settings.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"MiCOM protection relays"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"This is the relay device family rather than the complete relay panel. The CAD collection contains multiple relay ranges; choose the exact case size, terminal arrangement and revision."}],"references":[{"sourceId":"pub-object-micom-cad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-protection-relay-ied","current-transformer"],"artwork":"edu-object-schneider-electric-micom-protection-relays","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-micom-protection-relays","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-micom-protection-relays.svg"},{"slug":"invertek-drives-optidrive-eco","name":"Invertek Drives Optidrive Eco","kind":"object","abbreviation":"Optidrive Eco","aliases":["Optidrive Eco","Optidrive Eco CAD","Optidrive Eco general arrangement","Optidrive Eco panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Invertek Drives Optidrive Eco is a variable-frequency drive product family referenced for electrical equipment layout.","description":["Invertek Drives Optidrive Eco is a variable-frequency drive product family referenced for electrical equipment layout.","Reserve cooling airflow, power-cable bends, control wiring and any filter or reactor space. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Invertek Drives Optidrive Eco from the official public resource. CAD packages are frame-dependent. Determine the exact drive and enclosure option before applying a mechanical outline.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve cooling airflow, power-cable bends, control wiring and any filter or reactor space.","A drive cabinet envelope includes accessories and service access beyond the inverter module body."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve cooling airflow, power-cable bends, control wiring and any filter or reactor space.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A drive cabinet envelope includes accessories and service access beyond the inverter module body.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Invertek Drives"},{"label":"Published family / model","value":"Optidrive Eco"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"CAD packages are frame-dependent. Determine the exact drive and enclosure option before applying a mechanical outline."}],"references":[{"sourceId":"pub-object-invertek-eco","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-variable-frequency-drive","switchboard"],"artwork":"edu-object-invertek-drives-optidrive-eco","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/invertek-drives-optidrive-eco","illustration":"https://eloragrid.ai/library/illustrations/invertek-drives-optidrive-eco.svg"},{"slug":"schneider-electric-masterpact-mtz","name":"Schneider Electric MasterPact MTZ","kind":"object","abbreviation":"MasterPact MTZ","aliases":["MasterPact MTZ","MasterPact MTZ CAD","MasterPact MTZ general arrangement","MasterPact MTZ panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric MasterPact MTZ is a air circuit breaker product family referenced for electrical equipment layout.","description":["Schneider Electric MasterPact MTZ is a air circuit breaker product family referenced for electrical equipment layout.","Reserve the breaker body, terminals, operating controls and any withdrawal travel. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric MasterPact MTZ from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve the breaker body, terminals, operating controls and any withdrawal travel.","A fixed breaker envelope and a withdrawable breaker plus cradle require different installation space."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve the breaker body, terminals, operating controls and any withdrawal travel.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fixed breaker envelope and a withdrawable breaker plus cradle require different installation space.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"MasterPact MTZ"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-air-circuit-breaker","switchboard"],"artwork":"edu-object-schneider-electric-masterpact-mtz","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-masterpact-mtz","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-masterpact-mtz.svg"},{"slug":"schneider-electric-masterpact-mtz-active","name":"Schneider Electric MasterPacT MTZ Active","kind":"object","abbreviation":"MasterPacT MTZ Active","aliases":["MasterPacT MTZ Active","MasterPacT MTZ Active CAD","MasterPacT MTZ Active general arrangement","MasterPacT MTZ Active panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric MasterPacT MTZ Active is a air circuit breaker product family referenced for electrical equipment layout.","description":["Schneider Electric MasterPacT MTZ Active is a air circuit breaker product family referenced for electrical equipment layout.","Reserve the breaker body, terminals, operating controls and any withdrawal travel. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric MasterPacT MTZ Active from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve the breaker body, terminals, operating controls and any withdrawal travel.","A fixed breaker envelope and a withdrawable breaker plus cradle require different installation space."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve the breaker body, terminals, operating controls and any withdrawal travel.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fixed breaker envelope and a withdrawable breaker plus cradle require different installation space.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"MasterPacT MTZ Active"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-air-circuit-breaker","switchboard"],"artwork":"edu-object-schneider-electric-masterpact-mtz-active","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-masterpact-mtz-active","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-masterpact-mtz-active.svg"},{"slug":"schneider-electric-compact-nsx-new-generation","name":"Schneider Electric ComPacT NSX, new generation","kind":"object","abbreviation":"ComPacT NSX, new generation","aliases":["ComPacT NSX, new generation","ComPacT NSX, new generation CAD","ComPacT NSX, new generation general arrangement","ComPacT NSX, new generation panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric ComPacT NSX, new generation is a moulded-case circuit breaker product family referenced for electrical equipment layout.","description":["Schneider Electric ComPacT NSX, new generation is a moulded-case circuit breaker product family referenced for electrical equipment layout.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric ComPacT NSX, new generation from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"ComPacT NSX, new generation"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-moulded-case-circuit-breaker","switchboard"],"artwork":"edu-object-schneider-electric-compact-nsx-new-generation","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-compact-nsx-new-generation","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-compact-nsx-new-generation.svg"},{"slug":"schneider-electric-compact-nsxm-new-generation","name":"Schneider Electric ComPacT NSXm, new generation","kind":"object","abbreviation":"ComPacT NSXm, new generation","aliases":["ComPacT NSXm, new generation","ComPacT NSXm, new generation CAD","ComPacT NSXm, new generation general arrangement","ComPacT NSXm, new generation panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric ComPacT NSXm, new generation is a moulded-case circuit breaker product family referenced for electrical equipment layout.","description":["Schneider Electric ComPacT NSXm, new generation is a moulded-case circuit breaker product family referenced for electrical equipment layout.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric ComPacT NSXm, new generation from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Locate terminals and operating handle; account for side accessories and any rotary handle or door coupling.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Frame size, trip setting and interrupting capacity are separate attributes and cannot be read from a rectangle.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"ComPacT NSXm, new generation"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-moulded-case-circuit-breaker","switchboard"],"artwork":"edu-object-schneider-electric-compact-nsxm-new-generation","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-compact-nsxm-new-generation","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-compact-nsxm-new-generation.svg"},{"slug":"schneider-electric-compact-for-dc-networks-new-generation","name":"Schneider Electric ComPacT for DC networks, new generation","kind":"object","abbreviation":"ComPacT for DC networks, new generation","aliases":["ComPacT for DC networks, new generation","ComPacT for DC networks, new generation CAD","ComPacT for DC networks, new generation general arrangement","ComPacT for DC networks, new generation panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric ComPacT for DC networks, new generation is a dc circuit breaker product family referenced for electrical equipment layout.","description":["Schneider Electric ComPacT for DC networks, new generation is a dc circuit breaker product family referenced for electrical equipment layout.","Keep polarity requirements, pole connections and cable exit zones visible in the drawing package. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric ComPacT for DC networks, new generation from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Keep polarity requirements, pole connections and cable exit zones visible in the drawing package.","An AC breaker cannot be treated as a DC breaker merely because both fit the same rail."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Keep polarity requirements, pole connections and cable exit zones visible in the drawing package.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An AC breaker cannot be treated as a DC breaker merely because both fit the same rail.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"ComPacT for DC networks, new generation"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-dc-circuit-breaker","switchboard"],"artwork":"edu-object-schneider-electric-compact-for-dc-networks-new-generation","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-compact-for-dc-networks-new-generation","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-compact-for-dc-networks-new-generation.svg"},{"slug":"schneider-electric-compact-ins-inv","name":"Schneider Electric Compact INS/INV","kind":"object","abbreviation":"Compact INS/INV","aliases":["Compact INS/INV","Compact INS/INV CAD","Compact INS/INV general arrangement","Compact INS/INV panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric Compact INS/INV is a switch disconnector product family referenced for electrical equipment layout.","description":["Schneider Electric Compact INS/INV is a switch disconnector product family referenced for electrical equipment layout.","Coordinate shaft, handle, door interlock and terminal approach with enclosure depth. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric Compact INS/INV from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate shaft, handle, door interlock and terminal approach with enclosure depth.","A simple disconnector, switch disconnector and circuit breaker do not perform identical duties."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate shaft, handle, door interlock and terminal approach with enclosure depth.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A simple disconnector, switch disconnector and circuit breaker do not perform identical duties.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"Compact INS/INV"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-switch-disconnector","switchboard"],"artwork":"edu-object-schneider-electric-compact-ins-inv","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-compact-ins-inv","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-compact-ins-inv.svg"},{"slug":"schneider-electric-acti9-ic60","name":"Schneider Electric Acti9 iC60","kind":"object","abbreviation":"Acti9 iC60","aliases":["Acti9 iC60","Acti9 iC60 CAD","Acti9 iC60 general arrangement","Acti9 iC60 panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric Acti9 iC60 is a miniature circuit breaker product family referenced for electrical equipment layout.","description":["Schneider Electric Acti9 iC60 is a miniature circuit breaker product family referenced for electrical equipment layout.","Allow space for the actual number of poles, associated auxiliaries and supply comb connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric Acti9 iC60 from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Allow space for the actual number of poles, associated auxiliaries and supply comb connections.","A module-count sketch is a planning aid; an exact footprint depends on product series and pole configuration."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Allow space for the actual number of poles, associated auxiliaries and supply comb connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A module-count sketch is a planning aid; an exact footprint depends on product series and pole configuration.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"Acti9 iC60"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-miniature-circuit-breaker","switchboard"],"artwork":"edu-object-schneider-electric-acti9-ic60","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-acti9-ic60","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-acti9-ic60.svg"},{"slug":"schneider-electric-acti9-ic60-rcbo","name":"Schneider Electric Acti9 iC60 RCBO","kind":"object","abbreviation":"Acti9 iC60 RCBO","aliases":["Acti9 iC60 RCBO","Acti9 iC60 RCBO CAD","Acti9 iC60 RCBO general arrangement","Acti9 iC60 RCBO panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric Acti9 iC60 RCBO is a residual-current breaker with overcurrent protection product family referenced for electrical equipment layout.","description":["Schneider Electric Acti9 iC60 RCBO is a residual-current breaker with overcurrent protection product family referenced for electrical equipment layout.","Coordinate line and neutral connections, test access and any neutral flying lead in the selected product. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric Acti9 iC60 RCBO from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate line and neutral connections, test access and any neutral flying lead in the selected product.","The protective functions and connection arrangements must be checked separately from mounting width."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate line and neutral connections, test access and any neutral flying lead in the selected product.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The protective functions and connection arrangements must be checked separately from mounting width.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"Acti9 iC60 RCBO"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-residual-current-breaker-with-overcurrent-protection","switchboard"],"artwork":"edu-object-schneider-electric-acti9-ic60-rcbo","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-acti9-ic60-rcbo","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-acti9-ic60-rcbo.svg"},{"slug":"schneider-electric-prismaset-6300","name":"Schneider Electric PrismaSeT 6300","kind":"object","abbreviation":"PrismaSeT 6300","aliases":["PrismaSeT 6300","PrismaSeT 6300 CAD","PrismaSeT 6300 general arrangement","PrismaSeT 6300 panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric PrismaSeT 6300 is a floor-standing enclosure product family referenced for electrical equipment layout.","description":["Schneider Electric PrismaSeT 6300 is a floor-standing enclosure product family referenced for electrical equipment layout.","Coordinate base fixing, doors, cable entries and internal mounting surfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric PrismaSeT 6300 from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim. This is an assembly system; the final lineup geometry depends on the configured sections and equipment.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate base fixing, doors, cable entries and internal mounting surfaces.","An enclosure is not automatically a verified switchboard assembly."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate base fixing, doors, cable entries and internal mounting surfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An enclosure is not automatically a verified switchboard assembly.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"PrismaSeT 6300"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim. This is an assembly system; the final lineup geometry depends on the configured sections and equipment."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-floor-standing-enclosure","switchboard"],"artwork":"edu-object-schneider-electric-prismaset-6300","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-prismaset-6300","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-prismaset-6300.svg"},{"slug":"schneider-electric-prismaset-g","name":"Schneider Electric PrismaSeT G","kind":"object","abbreviation":"PrismaSeT G","aliases":["PrismaSeT G","PrismaSeT G CAD","PrismaSeT G general arrangement","PrismaSeT G panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric PrismaSeT G is a floor-standing enclosure product family referenced for electrical equipment layout.","description":["Schneider Electric PrismaSeT G is a floor-standing enclosure product family referenced for electrical equipment layout.","Coordinate base fixing, doors, cable entries and internal mounting surfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric PrismaSeT G from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim. This is an assembly system; the final lineup geometry depends on the configured sections and equipment.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate base fixing, doors, cable entries and internal mounting surfaces.","An enclosure is not automatically a verified switchboard assembly."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate base fixing, doors, cable entries and internal mounting surfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An enclosure is not automatically a verified switchboard assembly.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"PrismaSeT G"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim. This is an assembly system; the final lineup geometry depends on the configured sections and equipment."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-floor-standing-enclosure","switchboard"],"artwork":"edu-object-schneider-electric-prismaset-g","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-prismaset-g","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-prismaset-g.svg"},{"slug":"schneider-electric-tesys-k-contactors","name":"Schneider Electric TeSys K contactors","kind":"object","abbreviation":"TeSys K contactors","aliases":["TeSys K contactors","TeSys K contactors CAD","TeSys K contactors general arrangement","TeSys K contactors panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric TeSys K contactors is a power contactor product family referenced for electrical equipment layout.","description":["Schneider Electric TeSys K contactors is a power contactor product family referenced for electrical equipment layout.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric TeSys K contactors from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","A contactor requires separate protection and its operational rating depends on the load duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A contactor requires separate protection and its operational rating depends on the load duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"TeSys K contactors"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-power-contactor","switchboard"],"artwork":"edu-object-schneider-electric-tesys-k-contactors","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-tesys-k-contactors","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-tesys-k-contactors.svg"},{"slug":"schneider-electric-tesys-giga-contactors","name":"Schneider Electric TeSys Giga contactors","kind":"object","abbreviation":"TeSys Giga contactors","aliases":["TeSys Giga contactors","TeSys Giga contactors CAD","TeSys Giga contactors general arrangement","TeSys Giga contactors panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric TeSys Giga contactors is a power contactor product family referenced for electrical equipment layout.","description":["Schneider Electric TeSys Giga contactors is a power contactor product family referenced for electrical equipment layout.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric TeSys Giga contactors from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","A contactor requires separate protection and its operational rating depends on the load duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Place power and coil wiring so that accessory blocks and terminal labels remain accessible.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A contactor requires separate protection and its operational rating depends on the load duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"TeSys Giga contactors"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-power-contactor","switchboard"],"artwork":"edu-object-schneider-electric-tesys-giga-contactors","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-tesys-giga-contactors","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-tesys-giga-contactors.svg"},{"slug":"schneider-electric-tesys-deca-overload-relays","name":"Schneider Electric TeSys Deca overload relays","kind":"object","abbreviation":"TeSys Deca overload relays","aliases":["TeSys Deca overload relays","TeSys Deca overload relays CAD","TeSys Deca overload relays general arrangement","TeSys Deca overload relays panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric TeSys Deca overload relays is a thermal overload relay product family referenced for electrical equipment layout.","description":["Schneider Electric TeSys Deca overload relays is a thermal overload relay product family referenced for electrical equipment layout.","Account for direct attachment to a contactor or a separate mounting adapter. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric TeSys Deca overload relays from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim. The record concerns the relay device family, not the complete protection panel.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Account for direct attachment to a contactor or a separate mounting adapter.","An overload relay is not a short-circuit interruption device."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Account for direct attachment to a contactor or a separate mounting adapter.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An overload relay is not a short-circuit interruption device.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"TeSys Deca overload relays"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim. The record concerns the relay device family, not the complete protection panel."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-thermal-overload-relay","switchboard"],"artwork":"edu-object-schneider-electric-tesys-deca-overload-relays","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-tesys-deca-overload-relays","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-tesys-deca-overload-relays.svg"},{"slug":"schneider-electric-tesys-gv2-lc","name":"Schneider Electric TeSys GV2, LC","kind":"object","abbreviation":"TeSys GV2, LC","aliases":["TeSys GV2, LC","TeSys GV2, LC CAD","TeSys GV2, LC general arrangement","TeSys GV2, LC panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric TeSys GV2, LC is a motor-protection circuit breaker product family referenced for electrical equipment layout.","description":["Schneider Electric TeSys GV2, LC is a motor-protection circuit breaker product family referenced for electrical equipment layout.","Position beside its coordinated contactor where the selected assembly requires that arrangement. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric TeSys GV2, LC from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Position beside its coordinated contactor where the selected assembly requires that arrangement.","A motor feeder also needs a documented starter combination and coordination study; the device outline is insufficient."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Position beside its coordinated contactor where the selected assembly requires that arrangement.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A motor feeder also needs a documented starter combination and coordination study; the device outline is insufficient.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"TeSys GV2, LC"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-motor-protection-circuit-breaker","switchboard"],"artwork":"edu-object-schneider-electric-tesys-gv2-lc","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-tesys-gv2-lc","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-tesys-gv2-lc.svg"},{"slug":"schneider-electric-powerlogic-pm5000","name":"Schneider Electric PowerLogic PM5000","kind":"object","abbreviation":"PowerLogic PM5000","aliases":["PowerLogic PM5000","PowerLogic PM5000 CAD","PowerLogic PM5000 general arrangement","PowerLogic PM5000 panel layout"],"category":"measurement-protection","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric PowerLogic PM5000 is a panel power meter product family referenced for electrical equipment layout.","description":["Schneider Electric PowerLogic PM5000 is a panel power meter product family referenced for electrical equipment layout.","Show front cut-out, rear terminals and communication cable routes. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric PowerLogic PM5000 from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show front cut-out, rear terminals and communication cable routes.","A direct-connected meter and a CT-connected meter need different wiring details."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show front cut-out, rear terminals and communication cable routes.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A direct-connected meter and a CT-connected meter need different wiring details.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"PowerLogic PM5000"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-panel-power-meter","current-transformer"],"artwork":"edu-object-schneider-electric-powerlogic-pm5000","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-powerlogic-pm5000","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-powerlogic-pm5000.svg"},{"slug":"schneider-electric-powerlogic-pm8000","name":"Schneider Electric PowerLogic PM8000","kind":"object","abbreviation":"PowerLogic PM8000","aliases":["PowerLogic PM8000","PowerLogic PM8000 CAD","PowerLogic PM8000 general arrangement","PowerLogic PM8000 panel layout"],"category":"measurement-protection","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric PowerLogic PM8000 is a panel power meter product family referenced for electrical equipment layout.","description":["Schneider Electric PowerLogic PM8000 is a panel power meter product family referenced for electrical equipment layout.","Show front cut-out, rear terminals and communication cable routes. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric PowerLogic PM8000 from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show front cut-out, rear terminals and communication cable routes.","A direct-connected meter and a CT-connected meter need different wiring details."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show front cut-out, rear terminals and communication cable routes.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A direct-connected meter and a CT-connected meter need different wiring details.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"PowerLogic PM8000"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-panel-power-meter","current-transformer"],"artwork":"edu-object-schneider-electric-powerlogic-pm8000","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-powerlogic-pm8000","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-powerlogic-pm8000.svg"},{"slug":"schneider-electric-powerlogic-p5-protection-relays","name":"Schneider Electric PowerLogic P5 protection relays","kind":"object","abbreviation":"PowerLogic P5 protection relays","aliases":["PowerLogic P5 protection relays","PowerLogic P5 protection relays CAD","PowerLogic P5 protection relays general arrangement","PowerLogic P5 protection relays panel layout"],"category":"measurement-protection","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric PowerLogic P5 protection relays is a protection relay ied product family referenced for electrical equipment layout.","description":["Schneider Electric PowerLogic P5 protection relays is a protection relay ied product family referenced for electrical equipment layout.","Coordinate the case cut-out, rear terminal depth, communications and test access. The GA locates the physical item; the schematic or schedule records its interfaces.","This record identifies Schneider Electric PowerLogic P5 protection relays from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim. The record concerns the relay device family, not the complete protection panel.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate the case cut-out, rear terminal depth, communications and test access.","Relay case size does not determine the enabled protection functions or settings."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate the case cut-out, rear terminal depth, communications and test access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Relay case size does not determine the enabled protection functions or settings.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"PowerLogic P5 protection relays"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim. The record concerns the relay device family, not the complete protection panel."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-protection-relay-ied","current-transformer"],"artwork":"edu-object-schneider-electric-powerlogic-p5-protection-relays","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-powerlogic-p5-protection-relays","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-powerlogic-p5-protection-relays.svg"},{"slug":"schneider-electric-powerlogic-pfc-capacitor-banks","name":"Schneider Electric PowerLogic PFC Capacitor Banks","kind":"object","abbreviation":"PowerLogic PFC Capacitor Banks","aliases":["PowerLogic PFC Capacitor Banks","PowerLogic PFC Capacitor Banks CAD","PowerLogic PFC Capacitor Banks general arrangement","PowerLogic PFC Capacitor Banks panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric PowerLogic PFC Capacitor Banks is a power-factor-correction capacitor bank product family referenced for electrical equipment layout.","description":["Schneider Electric PowerLogic PFC Capacitor Banks is a power-factor-correction capacitor bank product family referenced for electrical equipment layout.","Allow the controller, switching devices, capacitor modules and any reactors within the cabinet. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Schneider Electric PowerLogic PFC Capacitor Banks from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Allow the controller, switching devices, capacitor modules and any reactors within the cabinet.","A capacitor-bank cabinet and an active harmonic filter address different power-quality functions."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Allow the controller, switching devices, capacitor modules and any reactors within the cabinet.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A capacitor-bank cabinet and an active harmonic filter address different power-quality functions.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"PowerLogic PFC Capacitor Banks"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-power-factor-correction-capacitor-bank","switchboard"],"artwork":"edu-object-schneider-electric-powerlogic-pfc-capacitor-banks","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-powerlogic-pfc-capacitor-banks","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-powerlogic-pfc-capacitor-banks.svg"},{"slug":"schneider-electric-powerlogic-t500-substation-controller","name":"Schneider Electric PowerLogic T500 Substation Controller","kind":"object","abbreviation":"PowerLogic T500 Substation Controller","aliases":["PowerLogic T500 Substation Controller","PowerLogic T500 Substation Controller CAD","PowerLogic T500 Substation Controller general arrangement","PowerLogic T500 Substation Controller panel layout"],"category":"control-circuits","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric PowerLogic T500 Substation Controller is a substation rtu product family referenced for electrical equipment layout.","description":["Schneider Electric PowerLogic T500 Substation Controller is a substation rtu product family referenced for electrical equipment layout.","Coordinate field I/O, communication ports, auxiliary supply and terminal mapping. The GA locates the physical item; the schematic or schedule records its interfaces.","This record identifies Schneider Electric PowerLogic T500 Substation Controller from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate field I/O, communication ports, auxiliary supply and terminal mapping.","An RTU and a microgrid dispatch controller are not automatically interchangeable."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate field I/O, communication ports, auxiliary supply and terminal mapping.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An RTU and a microgrid dispatch controller are not automatically interchangeable.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"PowerLogic T500 Substation Controller"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-substation-rtu","generator-package"],"artwork":"edu-object-schneider-electric-powerlogic-t500-substation-controller","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-powerlogic-t500-substation-controller","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-powerlogic-t500-substation-controller.svg"},{"slug":"schneider-electric-transferpact","name":"Schneider Electric TransferPacT","kind":"object","abbreviation":"TransferPacT","aliases":["TransferPacT","TransferPacT CAD","TransferPacT general arrangement","TransferPacT panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Schneider Electric TransferPacT is a source-transfer switch assembly product family referenced for electrical equipment layout.","description":["Schneider Electric TransferPacT is a source-transfer switch assembly product family referenced for electrical equipment layout.","Coordinate source cables, controls, interlocks and operating access. The GA locates the physical item; the schematic or schedule records its interfaces.","This record identifies Schneider Electric TransferPacT from the official public resource. Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim. This is a source-transfer equipment family; consult its actual transfer arrangement rather than treating it as a simple isolator.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate source cables, controls, interlocks and operating access.","Transfer sequence and switched-neutral arrangements are engineering choices that require explicit documentation."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate source cables, controls, interlocks and operating access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Transfer sequence and switched-neutral arrangements are engineering choices that require explicit documentation.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Schneider Electric"},{"label":"Published family / model","value":"TransferPacT"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official UK range identity. Check the exact regional catalogue number and current product documentation; this entry supplies no dimensions, certification or availability claim. This is a source-transfer equipment family; consult its actual transfer arrangement rather than treating it as a simple isolator."}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-source-transfer-switch-assembly","switchboard"],"artwork":"edu-object-schneider-electric-transferpact","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/schneider-electric-transferpact","illustration":"https://eloragrid.ai/library/illustrations/schneider-electric-transferpact.svg"},{"slug":"abb-mns-switchgear","name":"ABB MNS switchgear","kind":"object","abbreviation":"MNS switchgear","aliases":["MNS switchgear","MNS switchgear CAD","MNS switchgear general arrangement","MNS switchgear panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"ABB MNS switchgear is a low-voltage switchgear lineup product family referenced for electrical equipment layout.","description":["ABB MNS switchgear is a low-voltage switchgear lineup product family referenced for electrical equipment layout.","Coordinate section arrangement, access faces and connection interfaces. The GA locates the physical item; the schematic or schedule records its interfaces.","This record identifies ABB MNS switchgear from the official public resource. ABB low-voltage assembly family. The configured distribution and motor-control sections determine the project GA.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate section arrangement, access faces and connection interfaces.","A bare enclosure system and a complete switchgear assembly have different verification scopes."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate section arrangement, access faces and connection interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A bare enclosure system and a complete switchgear assembly have different verification scopes.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"ABB"},{"label":"Published family / model","value":"MNS switchgear"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"ABB low-voltage assembly family. The configured distribution and motor-control sections determine the project GA."}],"references":[{"sourceId":"pub-object-count-abb-lv","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-low-voltage-switchgear-lineup","switchboard"],"artwork":"edu-object-abb-mns-switchgear","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/abb-mns-switchgear","illustration":"https://eloragrid.ai/library/illustrations/abb-mns-switchgear.svg"},{"slug":"abb-reliagear-sg-switchgear","name":"ABB ReliaGear SG switchgear","kind":"object","abbreviation":"ReliaGear SG switchgear","aliases":["ReliaGear SG switchgear","ReliaGear SG switchgear CAD","ReliaGear SG switchgear general arrangement","ReliaGear SG switchgear panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"ABB ReliaGear SG switchgear is a low-voltage switchgear lineup product family referenced for electrical equipment layout.","description":["ABB ReliaGear SG switchgear is a low-voltage switchgear lineup product family referenced for electrical equipment layout.","Coordinate section arrangement, access faces and connection interfaces. The GA locates the physical item; the schematic or schedule records its interfaces.","This record identifies ABB ReliaGear SG switchgear from the official public resource. Official assembly family; select complete sections, accessories and project drawings rather than inferring a footprint from the family name.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate section arrangement, access faces and connection interfaces.","A bare enclosure system and a complete switchgear assembly have different verification scopes."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate section arrangement, access faces and connection interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A bare enclosure system and a complete switchgear assembly have different verification scopes.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"ABB"},{"label":"Published family / model","value":"ReliaGear SG switchgear"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official assembly family; select complete sections, accessories and project drawings rather than inferring a footprint from the family name."}],"references":[{"sourceId":"pub-object-count-abb-lv","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-low-voltage-switchgear-lineup","switchboard"],"artwork":"edu-object-abb-reliagear-sg-switchgear","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/abb-reliagear-sg-switchgear","illustration":"https://eloragrid.ai/library/illustrations/abb-reliagear-sg-switchgear.svg"},{"slug":"abb-unigear-switchgear","name":"ABB UniGear switchgear","kind":"object","abbreviation":"UniGear switchgear","aliases":["UniGear switchgear","UniGear switchgear CAD","UniGear switchgear general arrangement","UniGear switchgear panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"ABB UniGear switchgear is a medium-voltage switchgear lineup product family referenced for electrical equipment layout.","description":["ABB UniGear switchgear is a medium-voltage switchgear lineup product family referenced for electrical equipment layout.","Coordinate complete bay widths, cable entries, equipment access and pressure-relief interfaces. The GA locates the physical item; the schematic or schedule records its interfaces.","This record identifies ABB UniGear switchgear from the official public resource. Primary-distribution assembly family. The complete switchgear panel and project configuration require manufacturer drawings; the preview is not a breaker-truck outline.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate complete bay widths, cable entries, equipment access and pressure-relief interfaces.","A product family is not a project-specific lineup drawing."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate complete bay widths, cable entries, equipment access and pressure-relief interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A product family is not a project-specific lineup drawing.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"ABB"},{"label":"Published family / model","value":"UniGear switchgear"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Primary-distribution assembly family. The complete switchgear panel and project configuration require manufacturer drawings; the preview is not a breaker-truck outline."}],"references":[{"sourceId":"pub-object-abb-unigear","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-medium-voltage-switchgear-lineup","switchboard"],"artwork":"edu-object-abb-unigear-switchgear","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/abb-unigear-switchgear","illustration":"https://eloragrid.ai/library/illustrations/abb-unigear-switchgear.svg"},{"slug":"ga-protection-relay-ied","name":"Protection relay IED","kind":"object","abbreviation":"GA","aliases":["intelligent electronic device","Protection relay IED CAD","Protection relay IED general arrangement","Protection relay IED panel layout"],"category":"measurement-protection","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A protection relay IED implements the selected measurement, protection and control functions.","description":["A protection relay IED implements the selected measurement, protection and control functions.","Coordinate the case cut-out, rear terminal depth, communications and test access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate the case cut-out, rear terminal depth, communications and test access.","Relay case size does not determine the enabled protection functions or settings."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate the case cut-out, rear terminal depth, communications and test access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Relay case size does not determine the enabled protection functions or settings.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-micom-cad","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-object-ga-protection-relay-ied","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-protection-relay-ied","illustration":"https://eloragrid.ai/library/illustrations/ga-protection-relay-ied.svg"},{"slug":"ga-medium-voltage-switchgear-lineup","name":"Medium-voltage switchgear lineup","kind":"object","abbreviation":"GA","aliases":["MV switchgear assembly","Medium-voltage switchgear lineup CAD","Medium-voltage switchgear lineup general arrangement","Medium-voltage switchgear lineup panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A medium-voltage switchgear lineup groups specified switching, protection and connection panels.","description":["A medium-voltage switchgear lineup groups specified switching, protection and connection panels.","Coordinate complete bay widths, cable entries, equipment access and pressure-relief interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate complete bay widths, cable entries, equipment access and pressure-relief interfaces.","A product family is not a project-specific lineup drawing."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate complete bay widths, cable entries, equipment access and pressure-relief interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A product family is not a project-specific lineup drawing.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-abb-unigear","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-medium-voltage-switchgear-lineup","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-medium-voltage-switchgear-lineup","illustration":"https://eloragrid.ai/library/illustrations/ga-medium-voltage-switchgear-lineup.svg"},{"slug":"ga-low-voltage-switchgear-lineup","name":"Low-voltage switchgear lineup","kind":"object","abbreviation":"GA","aliases":["LV switchgear assembly","Low-voltage switchgear lineup CAD","Low-voltage switchgear lineup general arrangement","Low-voltage switchgear lineup panel layout"],"category":"power-distribution","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A low-voltage switchgear lineup groups specified incoming, outgoing and bus-section equipment.","description":["A low-voltage switchgear lineup groups specified incoming, outgoing and bus-section equipment.","Coordinate section arrangement, access faces and connection interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate section arrangement, access faces and connection interfaces.","A bare enclosure system and a complete switchgear assembly have different verification scopes."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate section arrangement, access faces and connection interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A bare enclosure system and a complete switchgear assembly have different verification scopes.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-count-abb-lv","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-low-voltage-switchgear-lineup","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-low-voltage-switchgear-lineup","illustration":"https://eloragrid.ai/library/illustrations/ga-low-voltage-switchgear-lineup.svg"},{"slug":"ga-source-transfer-switch-assembly","name":"Source-transfer switch assembly","kind":"object","abbreviation":"GA","aliases":["ATS transfer switching equipment","Source-transfer switch assembly CAD","Source-transfer switch assembly general arrangement","Source-transfer switch assembly panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A source-transfer assembly provides the documented switching arrangement between alternative supplies.","description":["A source-transfer assembly provides the documented switching arrangement between alternative supplies.","Coordinate source cables, controls, interlocks and operating access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate source cables, controls, interlocks and operating access.","Transfer sequence and switched-neutral arrangements are engineering choices that require explicit documentation."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate source cables, controls, interlocks and operating access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Transfer sequence and switched-neutral arrangements are engineering choices that require explicit documentation.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"transfer-switches","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-source-transfer-switch-assembly","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-source-transfer-switch-assembly","illustration":"https://eloragrid.ai/library/illustrations/ga-source-transfer-switch-assembly.svg"},{"slug":"ga-substation-rtu","name":"Substation RTU","kind":"object","abbreviation":"GA","aliases":["remote terminal unit","Substation RTU CAD","Substation RTU general arrangement","Substation RTU panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A substation RTU provides the specified monitoring, control and communications interface.","description":["A substation RTU provides the specified monitoring, control and communications interface.","Coordinate field I/O, communication ports, auxiliary supply and terminal mapping. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate field I/O, communication ports, auxiliary supply and terminal mapping.","An RTU and a microgrid dispatch controller are not automatically interchangeable."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate field I/O, communication ports, auxiliary supply and terminal mapping.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An RTU and a microgrid dispatch controller are not automatically interchangeable.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-schneider-ranges","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-substation-rtu","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-substation-rtu","illustration":"https://eloragrid.ai/library/illustrations/ga-substation-rtu.svg"},{"slug":"ga-industrial-ventilation-fan","name":"Industrial ventilation fan","kind":"object","abbreviation":"GA","aliases":["air movement fan","Industrial ventilation fan CAD","Industrial ventilation fan general arrangement","Industrial ventilation fan panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An industrial ventilation fan moves air through a selected room or equipment ventilation route.","description":["An industrial ventilation fan moves air through a selected room or equipment ventilation route.","Coordinate mounting, air direction, service access and power/control connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate mounting, air direction, service access and power/control connections.","A fan model must be selected for the documented system resistance and airflow duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate mounting, air direction, service access and power/control connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fan model must be selected for the documented system resistance and airflow duty.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-greenheck-products","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-industrial-ventilation-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-industrial-ventilation-fan","illustration":"https://eloragrid.ai/library/illustrations/ga-industrial-ventilation-fan.svg"},{"slug":"ga-lithium-battery-module","name":"Lithium battery module","kind":"object","abbreviation":"GA","aliases":["battery pack","Lithium battery module CAD","Lithium battery module general arrangement","Lithium battery module panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A lithium battery module stores energy and connects through the specified battery management arrangement.","description":["A lithium battery module stores energy and connects through the specified battery management arrangement.","Coordinate power terminals, communications, mounting and replacement access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate power terminals, communications, mounting and replacement access.","A battery module and a complete BESS cabinet or container are different levels of assembly."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate power terminals, communications, mounting and replacement access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A battery module and a complete BESS cabinet or container are different levels of assembly.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-victron-support","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-ga-lithium-battery-module","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-lithium-battery-module","illustration":"https://eloragrid.ai/library/illustrations/ga-lithium-battery-module.svg"},{"slug":"ga-din-rail-adapter-accessory","name":"DIN-rail adapter accessory","kind":"object","abbreviation":"GA","aliases":["mounting rail adapter","DIN-rail adapter accessory CAD","DIN-rail adapter accessory general arrangement","DIN-rail adapter accessory panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A DIN-rail adapter provides the selected interface between a device and a mounting rail.","description":["A DIN-rail adapter provides the selected interface between a device and a mounting rail.","Verify the compatible device, adapter fixing and installed depth. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Verify the compatible device, adapter fixing and installed depth.","An adapter cannot be assumed compatible with every device of a similar external size."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Verify the compatible device, adapter fixing and installed depth.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An adapter cannot be assumed compatible with every device of a similar external size.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-ad-drawings","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-din-rail-adapter-accessory","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-din-rail-adapter-accessory","illustration":"https://eloragrid.ai/library/illustrations/ga-din-rail-adapter-accessory.svg"},{"slug":"ga-combined-fire-smoke-damper","name":"Combined fire-smoke damper","kind":"object","abbreviation":"GA","aliases":["combination fire smoke damper","Combined fire-smoke damper CAD","Combined fire-smoke damper general arrangement","Combined fire-smoke damper panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A combined fire-smoke damper forms the specified closure and airflow-control interface at a building air passage.","description":["A combined fire-smoke damper forms the specified closure and airflow-control interface at a building air passage.","Coordinate the tested installation detail, actuator clearance and inspection access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate the tested installation detail, actuator clearance and inspection access.","A combined product classification does not establish compliance of the surrounding wall or duct penetration."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate the tested installation detail, actuator clearance and inspection access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A combined product classification does not establish compliance of the surrounding wall or duct penetration.","facts":[{"label":"Record type","value":"Generic equipment / layout object"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"}],"references":[{"sourceId":"pub-object-greenheck-aircontrol","relevance":"Public manufacturer or design reference relevant to this equipment class."}],"related":["switchboard","control-cabinet"],"artwork":"edu-object-ga-combined-fire-smoke-damper","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-combined-fire-smoke-damper","illustration":"https://eloragrid.ai/library/illustrations/ga-combined-fire-smoke-damper.svg"},{"slug":"victron-energy-multiplus-ii","name":"Victron Energy MultiPlus-II","kind":"object","abbreviation":"MultiPlus-II","aliases":["MultiPlus-II","MultiPlus-II CAD","MultiPlus-II general arrangement","MultiPlus-II panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Victron Energy MultiPlus-II is a battery inverter-charger product family referenced for electrical equipment layout.","description":["Victron Energy MultiPlus-II is a battery inverter-charger product family referenced for electrical equipment layout.","Reserve AC/DC cable zones, service access and remote control interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Victron Energy MultiPlus-II from the official public resource. Select the battery voltage, AC variant and exact model. The family includes multiple physical sizes.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve AC/DC cable zones, service access and remote control interfaces.","Bidirectional capability does not imply suitability for every grid or battery system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve AC/DC cable zones, service access and remote control interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Bidirectional capability does not imply suitability for every grid or battery system.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Victron Energy"},{"label":"Published family / model","value":"MultiPlus-II"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Select the battery voltage, AC variant and exact model. The family includes multiple physical sizes."}],"references":[{"sourceId":"pub-object-victron-multiplus-ii","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-battery-inverter-charger","generator-package"],"artwork":"edu-object-victron-energy-multiplus-ii","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/victron-energy-multiplus-ii","illustration":"https://eloragrid.ai/library/illustrations/victron-energy-multiplus-ii.svg"},{"slug":"victron-energy-quattro","name":"Victron Energy Quattro","kind":"object","abbreviation":"Quattro","aliases":["Quattro","Quattro CAD","Quattro general arrangement","Quattro panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Victron Energy Quattro is a battery inverter-charger product family referenced for electrical equipment layout.","description":["Victron Energy Quattro is a battery inverter-charger product family referenced for electrical equipment layout.","Reserve AC/DC cable zones, service access and remote control interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Victron Energy Quattro from the official public resource. Coordinate the selected dual-AC-input arrangement with the actual transfer and control documentation.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve AC/DC cable zones, service access and remote control interfaces.","Bidirectional capability does not imply suitability for every grid or battery system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve AC/DC cable zones, service access and remote control interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Bidirectional capability does not imply suitability for every grid or battery system.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Victron Energy"},{"label":"Published family / model","value":"Quattro"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Coordinate the selected dual-AC-input arrangement with the actual transfer and control documentation."}],"references":[{"sourceId":"pub-object-victron-quattro","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-battery-inverter-charger","generator-package"],"artwork":"edu-object-victron-energy-quattro","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/victron-energy-quattro","illustration":"https://eloragrid.ai/library/illustrations/victron-energy-quattro.svg"},{"slug":"victron-energy-smartsolar-mppt-rs","name":"Victron Energy SmartSolar MPPT RS","kind":"object","abbreviation":"SmartSolar MPPT RS","aliases":["SmartSolar MPPT RS","SmartSolar MPPT RS CAD","SmartSolar MPPT RS general arrangement","SmartSolar MPPT RS panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Victron Energy SmartSolar MPPT RS is a mppt solar charge controller product family referenced for electrical equipment layout.","description":["Victron Energy SmartSolar MPPT RS is a mppt solar charge controller product family referenced for electrical equipment layout.","Coordinate PV and battery terminals, cooling and communication interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Victron Energy SmartSolar MPPT RS from the official public resource. Select the model and verify its PV, battery and communications interfaces from the current manual.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate PV and battery terminals, cooling and communication interfaces.","A charge controller is not a grid-connected AC inverter."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate PV and battery terminals, cooling and communication interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A charge controller is not a grid-connected AC inverter.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Victron Energy"},{"label":"Published family / model","value":"SmartSolar MPPT RS"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Select the model and verify its PV, battery and communications interfaces from the current manual."}],"references":[{"sourceId":"pub-object-victron-smartsolar-mppt-rs","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-mppt-solar-charge-controller","generator-package"],"artwork":"edu-object-victron-energy-smartsolar-mppt-rs","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/victron-energy-smartsolar-mppt-rs","illustration":"https://eloragrid.ai/library/illustrations/victron-energy-smartsolar-mppt-rs.svg"},{"slug":"victron-energy-cerbo-gx","name":"Victron Energy Cerbo GX","kind":"object","abbreviation":"Cerbo GX","aliases":["Cerbo GX","Cerbo GX CAD","Cerbo GX general arrangement","Cerbo GX panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Victron Energy Cerbo GX is a energy-management controller product family referenced for electrical equipment layout.","description":["Victron Energy Cerbo GX is a energy-management controller product family referenced for electrical equipment layout.","Show communications, auxiliary supply and operator/network connection points. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Victron Energy Cerbo GX from the official public resource. A system monitoring/control device; coordinate attached GX displays, communication adapters and external interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show communications, auxiliary supply and operator/network connection points.","The controller enclosure does not define the site's operating strategy or protection settings."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show communications, auxiliary supply and operator/network connection points.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"The controller enclosure does not define the site's operating strategy or protection settings.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Victron Energy"},{"label":"Published family / model","value":"Cerbo GX"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"A system monitoring/control device; coordinate attached GX displays, communication adapters and external interfaces."}],"references":[{"sourceId":"pub-object-victron-cerbo-gx","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-energy-management-controller","generator-package"],"artwork":"edu-object-victron-energy-cerbo-gx","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/victron-energy-cerbo-gx","illustration":"https://eloragrid.ai/library/illustrations/victron-energy-cerbo-gx.svg"},{"slug":"victron-energy-lynx-distributor","name":"Victron Energy Lynx Distributor","kind":"object","abbreviation":"Lynx Distributor","aliases":["Lynx Distributor","Lynx Distributor CAD","Lynx Distributor general arrangement","Lynx Distributor panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Victron Energy Lynx Distributor is a battery dc bus distribution module product family referenced for electrical equipment layout.","description":["Victron Energy Lynx Distributor is a battery dc bus distribution module product family referenced for electrical equipment layout.","Show cable terminals, fuse service space and protective-cover removal. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Victron Energy Lynx Distributor from the official public resource. Coordinate the selected DC distribution assembly, fuse access and neighbouring Lynx modules.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show cable terminals, fuse service space and protective-cover removal.","A distribution module does not by itself provide the complete battery safety/control system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show cable terminals, fuse service space and protective-cover removal.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A distribution module does not by itself provide the complete battery safety/control system.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Victron Energy"},{"label":"Published family / model","value":"Lynx Distributor"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Coordinate the selected DC distribution assembly, fuse access and neighbouring Lynx modules."}],"references":[{"sourceId":"pub-object-victron-lynx-distributor","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-battery-dc-bus-distribution-module","generator-package"],"artwork":"edu-object-victron-energy-lynx-distributor","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/victron-energy-lynx-distributor","illustration":"https://eloragrid.ai/library/illustrations/victron-energy-lynx-distributor.svg"},{"slug":"victron-energy-lynx-smart-bms-ng","name":"Victron Energy Lynx Smart BMS NG","kind":"object","abbreviation":"Lynx Smart BMS NG","aliases":["Lynx Smart BMS NG","Lynx Smart BMS NG CAD","Lynx Smart BMS NG general arrangement","Lynx Smart BMS NG panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Victron Energy Lynx Smart BMS NG is a battery management system module product family referenced for electrical equipment layout.","description":["Victron Energy Lynx Smart BMS NG is a battery management system module product family referenced for electrical equipment layout.","Coordinate sensing, contactor-control, communications and battery connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Victron Energy Lynx Smart BMS NG from the official public resource. Verify compatibility with the specified NG battery system and reserve all module connections and service access.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate sensing, contactor-control, communications and battery connections.","A BMS controller and the complete battery enclosure are different scheduled objects."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate sensing, contactor-control, communications and battery connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A BMS controller and the complete battery enclosure are different scheduled objects.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Victron Energy"},{"label":"Published family / model","value":"Lynx Smart BMS NG"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Verify compatibility with the specified NG battery system and reserve all module connections and service access."}],"references":[{"sourceId":"pub-object-victron-lynx-smart-bms-ng","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-battery-management-system-module","generator-package"],"artwork":"edu-object-victron-energy-lynx-smart-bms-ng","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/victron-energy-lynx-smart-bms-ng","illustration":"https://eloragrid.ai/library/illustrations/victron-energy-lynx-smart-bms-ng.svg"},{"slug":"victron-energy-lithium-ng-batteries","name":"Victron Energy Lithium NG Batteries","kind":"object","abbreviation":"Lithium NG Batteries","aliases":["Lithium NG Batteries","Lithium NG Batteries CAD","Lithium NG Batteries general arrangement","Lithium NG Batteries panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Victron Energy Lithium NG Batteries is a lithium battery module product family referenced for electrical equipment layout.","description":["Victron Energy Lithium NG Batteries is a lithium battery module product family referenced for electrical equipment layout.","Coordinate power terminals, communications, mounting and replacement access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Victron Energy Lithium NG Batteries from the official public resource. The family comprises different battery variants. Select the actual battery voltage/capacity and management arrangement.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate power terminals, communications, mounting and replacement access.","A battery module and a complete BESS cabinet or container are different levels of assembly."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate power terminals, communications, mounting and replacement access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A battery module and a complete BESS cabinet or container are different levels of assembly.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Victron Energy"},{"label":"Published family / model","value":"Lithium NG Batteries"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"The family comprises different battery variants. Select the actual battery voltage/capacity and management arrangement."}],"references":[{"sourceId":"pub-object-victron-lithium-ng-batteries","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-lithium-battery-module","generator-package"],"artwork":"edu-object-victron-energy-lithium-ng-batteries","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/victron-energy-lithium-ng-batteries","illustration":"https://eloragrid.ai/library/illustrations/victron-energy-lithium-ng-batteries.svg"},{"slug":"victron-energy-smartshunt","name":"Victron Energy SmartShunt","kind":"object","abbreviation":"SmartShunt","aliases":["SmartShunt","SmartShunt CAD","SmartShunt general arrangement","SmartShunt panel layout"],"category":"measurement-protection","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Victron Energy SmartShunt is a battery current shunt product family referenced for electrical equipment layout.","description":["Victron Energy SmartShunt is a battery current shunt product family referenced for electrical equipment layout.","Coordinate high-current connections and separate sense-wire routing. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Victron Energy SmartShunt from the official public resource. Select the shunt version and coordinate the high-current and sense-wire connection zones.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate high-current connections and separate sense-wire routing.","A shunt measures voltage drop for its instrument; it is not a CT."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate high-current connections and separate sense-wire routing.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A shunt measures voltage drop for its instrument; it is not a CT.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Victron Energy"},{"label":"Published family / model","value":"SmartShunt"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Select the shunt version and coordinate the high-current and sense-wire connection zones."}],"references":[{"sourceId":"pub-object-victron-smartshunt","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-battery-current-shunt","current-transformer"],"artwork":"edu-object-victron-energy-smartshunt","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/victron-energy-smartshunt","illustration":"https://eloragrid.ai/library/illustrations/victron-energy-smartshunt.svg"},{"slug":"victron-energy-skylla-ip65","name":"Victron Energy Skylla-IP65","kind":"object","abbreviation":"Skylla-IP65","aliases":["Skylla-IP65","Skylla-IP65 CAD","Skylla-IP65 general arrangement","Skylla-IP65 panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Victron Energy Skylla-IP65 is a battery charger product family referenced for electrical equipment layout.","description":["Victron Energy Skylla-IP65 is a battery charger product family referenced for electrical equipment layout.","Show AC supply, DC output and battery connection routes separately. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Victron Energy Skylla-IP65 from the official public resource. Use the full charger model and its specified input, battery and installation requirements.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Show AC supply, DC output and battery connection routes separately.","Charging voltage and battery chemistry must match the selected battery system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Show AC supply, DC output and battery connection routes separately.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Charging voltage and battery chemistry must match the selected battery system.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Victron Energy"},{"label":"Published family / model","value":"Skylla-IP65"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Use the full charger model and its specified input, battery and installation requirements."}],"references":[{"sourceId":"pub-object-victron-skylla-ip65","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-battery-charger","switchboard"],"artwork":"edu-object-victron-energy-skylla-ip65","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/victron-energy-skylla-ip65","illustration":"https://eloragrid.ai/library/illustrations/victron-energy-skylla-ip65.svg"},{"slug":"victron-energy-multi-rs-solar","name":"Victron Energy Multi RS Solar","kind":"object","abbreviation":"Multi RS Solar","aliases":["Multi RS Solar","Multi RS Solar CAD","Multi RS Solar general arrangement","Multi RS Solar panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Victron Energy Multi RS Solar is a battery inverter-charger product family referenced for electrical equipment layout.","description":["Victron Energy Multi RS Solar is a battery inverter-charger product family referenced for electrical equipment layout.","Reserve AC/DC cable zones, service access and remote control interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Victron Energy Multi RS Solar from the official public resource. This family combines inverter/charger and solar interfaces; include PV terminals in addition to AC and battery routes.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve AC/DC cable zones, service access and remote control interfaces.","Bidirectional capability does not imply suitability for every grid or battery system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve AC/DC cable zones, service access and remote control interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Bidirectional capability does not imply suitability for every grid or battery system.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Victron Energy"},{"label":"Published family / model","value":"Multi RS Solar"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"This family combines inverter/charger and solar interfaces; include PV terminals in addition to AC and battery routes."}],"references":[{"sourceId":"pub-object-victron-multi-rs-solar","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-battery-inverter-charger","generator-package"],"artwork":"edu-object-victron-energy-multi-rs-solar","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/victron-energy-multi-rs-solar","illustration":"https://eloragrid.ai/library/illustrations/victron-energy-multi-rs-solar.svg"},{"slug":"victron-energy-multiplus-ii-2x-120v","name":"Victron Energy MultiPlus-II 2x 120V","kind":"object","abbreviation":"MultiPlus-II 2x 120V","aliases":["MultiPlus-II 2x 120V","MultiPlus-II 2x 120V CAD","MultiPlus-II 2x 120V general arrangement","MultiPlus-II 2x 120V panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Victron Energy MultiPlus-II 2x 120V is a battery inverter-charger product family referenced for electrical equipment layout.","description":["Victron Energy MultiPlus-II 2x 120V is a battery inverter-charger product family referenced for electrical equipment layout.","Reserve AC/DC cable zones, service access and remote control interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Victron Energy MultiPlus-II 2x 120V from the official public resource. This is a named regional AC arrangement. It must not be treated as the same variant as other MultiPlus-II products.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve AC/DC cable zones, service access and remote control interfaces.","Bidirectional capability does not imply suitability for every grid or battery system."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve AC/DC cable zones, service access and remote control interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Bidirectional capability does not imply suitability for every grid or battery system.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Victron Energy"},{"label":"Published family / model","value":"MultiPlus-II 2x 120V"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"This is a named regional AC arrangement. It must not be treated as the same variant as other MultiPlus-II products."}],"references":[{"sourceId":"pub-object-victron-multiplus-ii-2x-120v","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-battery-inverter-charger","generator-package"],"artwork":"edu-object-victron-energy-multiplus-ii-2x-120v","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/victron-energy-multiplus-ii-2x-120v","illustration":"https://eloragrid.ai/library/illustrations/victron-energy-multiplus-ii-2x-120v.svg"},{"slug":"victron-energy-din35-adapter","name":"Victron Energy DIN35 adapter","kind":"object","abbreviation":"DIN35 adapter","aliases":["DIN35 adapter","DIN35 adapter CAD","DIN35 adapter general arrangement","DIN35 adapter panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Victron Energy DIN35 adapter is a din-rail adapter accessory product family referenced for electrical equipment layout.","description":["Victron Energy DIN35 adapter is a din-rail adapter accessory product family referenced for electrical equipment layout.","Verify the compatible device, adapter fixing and installed depth. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Victron Energy DIN35 adapter from the official public resource. Check adapter size and the listed compatible devices; no universal rail-mount compatibility is asserted.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Verify the compatible device, adapter fixing and installed depth.","An adapter cannot be assumed compatible with every device of a similar external size."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Verify the compatible device, adapter fixing and installed depth.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"An adapter cannot be assumed compatible with every device of a similar external size.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Victron Energy"},{"label":"Published family / model","value":"DIN35 adapter"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Check adapter size and the listed compatible devices; no universal rail-mount compatibility is asserted."}],"references":[{"sourceId":"pub-object-victron-din35-adapter","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-din-rail-adapter-accessory","switchboard"],"artwork":"edu-object-victron-energy-din35-adapter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/victron-energy-din35-adapter","illustration":"https://eloragrid.ai/library/illustrations/victron-energy-din35-adapter.svg"},{"slug":"deif-ie-250-controllers","name":"DEIF iE 250 controllers","kind":"object","abbreviation":"iE 250 controllers","aliases":["iE 250 controllers","iE 250 controllers CAD","iE 250 controllers general arrangement","iE 250 controllers panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"DEIF iE 250 controllers is a generator paralleling controller product family referenced for electrical equipment layout.","description":["DEIF iE 250 controllers is a generator paralleling controller product family referenced for electrical equipment layout.","Coordinate controller terminals, metering inputs, communications and operator interfaces. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies DEIF iE 250 controllers from the official public resource. Official documentation distinguishes mounting and I/O variants. The installation envelope must include the selected controller and local display arrangement.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate controller terminals, metering inputs, communications and operator interfaces.","A controller outline does not establish the site's synchronising, protection or transfer sequence."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate controller terminals, metering inputs, communications and operator interfaces.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A controller outline does not establish the site's synchronising, protection or transfer sequence.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"DEIF"},{"label":"Published family / model","value":"iE 250 controllers"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Official documentation distinguishes mounting and I/O variants. The installation envelope must include the selected controller and local display arrangement."}],"references":[{"sourceId":"pub-object-deif-ie250","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-generator-paralleling-controller","generator-package"],"artwork":"edu-object-deif-ie-250-controllers","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/deif-ie-250-controllers","illustration":"https://eloragrid.ai/library/illustrations/deif-ie-250-controllers.svg"},{"slug":"westermo-ps2-60","name":"Westermo PS2-60","kind":"object","abbreviation":"PS2-60","aliases":["PS2-60","PS2-60 CAD","PS2-60 general arrangement","PS2-60 panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Westermo PS2-60 is a din-rail ac/dc power supply model referenced for electrical equipment layout.","description":["Westermo PS2-60 is a din-rail ac/dc power supply model referenced for electrical equipment layout.","Leave the selected mounting and cooling space and provide accessible input/output terminals. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Westermo PS2-60 from the official public resource. Use the published PS2-60 name. The support URL slug is not an electrical model designation.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Leave the selected mounting and cooling space and provide accessible input/output terminals.","Its nominal output rating does not guarantee sufficient headroom for every load or transient."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Leave the selected mounting and cooling space and provide accessible input/output terminals.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Its nominal output rating does not guarantee sufficient headroom for every load or transient.","facts":[{"label":"Record type","value":"Manufacturer model"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Westermo"},{"label":"Published family / model","value":"PS2-60"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Use the published PS2-60 name. The support URL slug is not an electrical model designation."}],"references":[{"sourceId":"pub-object-westermo-ps260","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-din-rail-ac-dc-power-supply","switchboard"],"artwork":"edu-object-westermo-ps2-60","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/westermo-ps2-60","illustration":"https://eloragrid.ai/library/illustrations/westermo-ps2-60.svg"},{"slug":"westermo-lynx-5612-e-f4g-t8g-lv","name":"Westermo Lynx 5612-E-F4G-T8G-LV","kind":"object","abbreviation":"Lynx 5612-E-F4G-T8G-LV","aliases":["Lynx 5612-E-F4G-T8G-LV","Lynx 5612-E-F4G-T8G-LV CAD","Lynx 5612-E-F4G-T8G-LV general arrangement","Lynx 5612-E-F4G-T8G-LV panel layout"],"category":"control-circuits","drawingTypes":["GA","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Westermo Lynx 5612-E-F4G-T8G-LV is a industrial ethernet switch model referenced for electrical equipment layout.","description":["Westermo Lynx 5612-E-F4G-T8G-LV is a industrial ethernet switch model referenced for electrical equipment layout.","Reserve power terminals, ports, patch-lead bends and optical-module access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Westermo Lynx 5612-E-F4G-T8G-LV from the official public resource. Retain the full suffix. Coordinate port access and the specified power supply without substituting another Lynx variant.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Reserve power terminals, ports, patch-lead bends and optical-module access.","Port count does not determine protocol capability, redundancy or time synchronisation support."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Reserve power terminals, ports, patch-lead bends and optical-module access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Port count does not determine protocol capability, redundancy or time synchronisation support.","facts":[{"label":"Record type","value":"Manufacturer model"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Westermo"},{"label":"Published family / model","value":"Lynx 5612-E-F4G-T8G-LV"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Retain the full suffix. Coordinate port access and the specified power supply without substituting another Lynx variant."}],"references":[{"sourceId":"pub-object-westermo-lynx5612","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-industrial-ethernet-switch","switchboard"],"artwork":"edu-object-westermo-lynx-5612-e-f4g-t8g-lv","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/westermo-lynx-5612-e-f4g-t8g-lv","illustration":"https://eloragrid.ai/library/illustrations/westermo-lynx-5612-e-f4g-t8g-lv.svg"},{"slug":"dagartech-bgpsw-15-st","name":"Dagartech BGPSW 15 ST","kind":"object","abbreviation":"BGPSW 15 ST","aliases":["BGPSW 15 ST","BGPSW 15 ST CAD","BGPSW 15 ST general arrangement","BGPSW 15 ST panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Dagartech BGPSW 15 ST is a diesel generator-set configuration documented on its official product page.","description":["Dagartech BGPSW 15 ST is a diesel generator-set configuration documented on its official product page.","Coordinate the complete set, electrical cables, fuel connections, airflow and access doors. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Dagartech BGPSW 15 ST from the official public resource. The cited configuration page is the 480/277 V variant; confirm exact frequency, canopy and accessory selection.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate the complete set, electrical cables, fuel connections, airflow and access doors.","Generator model, selected voltage configuration and physical options must all match the cited project drawing."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate the complete set, electrical cables, fuel connections, airflow and access doors.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Generator model, selected voltage configuration and physical options must all match the cited project drawing.","facts":[{"label":"Record type","value":"Manufacturer model"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Dagartech"},{"label":"Published family / model","value":"BGPSW 15 ST"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"The cited configuration page is the 480/277 V variant; confirm exact frequency, canopy and accessory selection."}],"references":[{"sourceId":"pub-object-dagartech-bgpsw-15-st","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-dagartech-bgpsw-15-st","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/dagartech-bgpsw-15-st","illustration":"https://eloragrid.ai/library/illustrations/dagartech-bgpsw-15-st.svg"},{"slug":"dagartech-dgb-415-st","name":"Dagartech DGB 415 ST","kind":"object","abbreviation":"DGB 415 ST","aliases":["DGB 415 ST","DGB 415 ST CAD","DGB 415 ST general arrangement","DGB 415 ST panel layout"],"category":"microgrid-systems","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Dagartech DGB 415 ST is a diesel generator-set configuration documented on its official product page.","description":["Dagartech DGB 415 ST is a diesel generator-set configuration documented on its official product page.","Coordinate the complete set, electrical cables, fuel connections, airflow and access doors. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Dagartech DGB 415 ST from the official public resource. The cited configuration page is the 400/230 V variant; confirm exact frequency, canopy and accessory selection.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate the complete set, electrical cables, fuel connections, airflow and access doors.","Generator model, selected voltage configuration and physical options must all match the cited project drawing."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate the complete set, electrical cables, fuel connections, airflow and access doors.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Generator model, selected voltage configuration and physical options must all match the cited project drawing.","facts":[{"label":"Record type","value":"Manufacturer model"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Dagartech"},{"label":"Published family / model","value":"DGB 415 ST"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"The cited configuration page is the 400/230 V variant; confirm exact frequency, canopy and accessory selection."}],"references":[{"sourceId":"pub-object-dagartech-dgb-415-st","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["generator-package","battery-cabinet"],"artwork":"edu-object-dagartech-dgb-415-st","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/dagartech-dgb-415-st","illustration":"https://eloragrid.ai/library/illustrations/dagartech-dgb-415-st.svg"},{"slug":"greenheck-qei-inline-fan","name":"Greenheck QEI inline fan","kind":"object","abbreviation":"QEI inline fan","aliases":["QEI inline fan","QEI inline fan CAD","QEI inline fan general arrangement","QEI inline fan panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck QEI inline fan is a industrial ventilation fan product family referenced for electrical equipment layout.","description":["Greenheck QEI inline fan is a industrial ventilation fan product family referenced for electrical equipment layout.","Coordinate mounting, air direction, service access and power/control connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck QEI inline fan from the official public resource. Belt-driven inline fan family; coordinate belt/motor service access from the selected size.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate mounting, air direction, service access and power/control connections.","A fan model must be selected for the documented system resistance and airflow duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate mounting, air direction, service access and power/control connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fan model must be selected for the documented system resistance and airflow duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"QEI inline fan"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Belt-driven inline fan family; coordinate belt/motor service access from the selected size."}],"references":[{"sourceId":"pub-object-greenheck-fans","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."},{"sourceId":"pub-object-greenheck-fan-selection","relevance":"Official named fan families and application-selection context."}],"related":["ga-industrial-ventilation-fan","switchboard"],"artwork":"edu-object-greenheck-qei-inline-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-qei-inline-fan","illustration":"https://eloragrid.ai/library/illustrations/greenheck-qei-inline-fan.svg"},{"slug":"greenheck-qeid-inline-fan","name":"Greenheck QEID inline fan","kind":"object","abbreviation":"QEID inline fan","aliases":["QEID inline fan","QEID inline fan CAD","QEID inline fan general arrangement","QEID inline fan panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck QEID inline fan is a industrial ventilation fan product family referenced for electrical equipment layout.","description":["Greenheck QEID inline fan is a industrial ventilation fan product family referenced for electrical equipment layout.","Coordinate mounting, air direction, service access and power/control connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck QEID inline fan from the official public resource. Direct-drive inline fan family; select the exact size and mounting arrangement.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate mounting, air direction, service access and power/control connections.","A fan model must be selected for the documented system resistance and airflow duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate mounting, air direction, service access and power/control connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fan model must be selected for the documented system resistance and airflow duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"QEID inline fan"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Direct-drive inline fan family; select the exact size and mounting arrangement."}],"references":[{"sourceId":"pub-object-greenheck-fans","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."},{"sourceId":"pub-object-greenheck-fan-selection","relevance":"Official named fan families and application-selection context."}],"related":["ga-industrial-ventilation-fan","switchboard"],"artwork":"edu-object-greenheck-qeid-inline-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-qeid-inline-fan","illustration":"https://eloragrid.ai/library/illustrations/greenheck-qeid-inline-fan.svg"},{"slug":"greenheck-tbi-fs-inline-fan","name":"Greenheck TBI-FS inline fan","kind":"object","abbreviation":"TBI-FS inline fan","aliases":["TBI-FS inline fan","TBI-FS inline fan CAD","TBI-FS inline fan general arrangement","TBI-FS inline fan panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck TBI-FS inline fan is a industrial ventilation fan product family referenced for electrical equipment layout.","description":["Greenheck TBI-FS inline fan is a industrial ventilation fan product family referenced for electrical equipment layout.","Coordinate mounting, air direction, service access and power/control connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck TBI-FS inline fan from the official public resource. Tube-axial inline fan family. Coordinate the selected fan mounting and connected duct interfaces.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate mounting, air direction, service access and power/control connections.","A fan model must be selected for the documented system resistance and airflow duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate mounting, air direction, service access and power/control connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fan model must be selected for the documented system resistance and airflow duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"TBI-FS inline fan"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Tube-axial inline fan family. Coordinate the selected fan mounting and connected duct interfaces."}],"references":[{"sourceId":"pub-object-greenheck-fans","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-industrial-ventilation-fan","switchboard"],"artwork":"edu-object-greenheck-tbi-fs-inline-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-tbi-fs-inline-fan","illustration":"https://eloragrid.ai/library/illustrations/greenheck-tbi-fs-inline-fan.svg"},{"slug":"greenheck-vab-fan","name":"Greenheck VAB fan","kind":"object","abbreviation":"VAB fan","aliases":["VAB fan","VAB fan CAD","VAB fan general arrangement","VAB fan panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck VAB fan is a industrial ventilation fan product family referenced for electrical equipment layout.","description":["Greenheck VAB fan is a industrial ventilation fan product family referenced for electrical equipment layout.","Coordinate mounting, air direction, service access and power/control connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck VAB fan from the official public resource. Use the exact fan size and the manufacturer mounting configuration before establishing the envelope.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate mounting, air direction, service access and power/control connections.","A fan model must be selected for the documented system resistance and airflow duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate mounting, air direction, service access and power/control connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fan model must be selected for the documented system resistance and airflow duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"VAB fan"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Use the exact fan size and the manufacturer mounting configuration before establishing the envelope."}],"references":[{"sourceId":"pub-object-greenheck-fans","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."},{"sourceId":"pub-object-greenheck-fan-selection","relevance":"Official named fan families and application-selection context."}],"related":["ga-industrial-ventilation-fan","switchboard"],"artwork":"edu-object-greenheck-vab-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-vab-fan","illustration":"https://eloragrid.ai/library/illustrations/greenheck-vab-fan.svg"},{"slug":"greenheck-vad-fan","name":"Greenheck VAD fan","kind":"object","abbreviation":"VAD fan","aliases":["VAD fan","VAD fan CAD","VAD fan general arrangement","VAD fan panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck VAD fan is a industrial ventilation fan product family referenced for electrical equipment layout.","description":["Greenheck VAD fan is a industrial ventilation fan product family referenced for electrical equipment layout.","Coordinate mounting, air direction, service access and power/control connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck VAD fan from the official public resource. Use the exact fan size and the manufacturer mounting configuration before establishing the envelope.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate mounting, air direction, service access and power/control connections.","A fan model must be selected for the documented system resistance and airflow duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate mounting, air direction, service access and power/control connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fan model must be selected for the documented system resistance and airflow duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"VAD fan"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Use the exact fan size and the manufacturer mounting configuration before establishing the envelope."}],"references":[{"sourceId":"pub-object-greenheck-fans","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."},{"sourceId":"pub-object-greenheck-fan-selection","relevance":"Official named fan families and application-selection context."}],"related":["ga-industrial-ventilation-fan","switchboard"],"artwork":"edu-object-greenheck-vad-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-vad-fan","illustration":"https://eloragrid.ai/library/illustrations/greenheck-vad-fan.svg"},{"slug":"greenheck-usf-fan","name":"Greenheck USF fan","kind":"object","abbreviation":"USF fan","aliases":["USF fan","USF fan CAD","USF fan general arrangement","USF fan panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck USF fan is a industrial ventilation fan product family referenced for electrical equipment layout.","description":["Greenheck USF fan is a industrial ventilation fan product family referenced for electrical equipment layout.","Coordinate mounting, air direction, service access and power/control connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck USF fan from the official public resource. Utility fan family; coordinate actual casing outlet and motor arrangement.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate mounting, air direction, service access and power/control connections.","A fan model must be selected for the documented system resistance and airflow duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate mounting, air direction, service access and power/control connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fan model must be selected for the documented system resistance and airflow duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"USF fan"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Utility fan family; coordinate actual casing outlet and motor arrangement."}],"references":[{"sourceId":"pub-object-greenheck-fans","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-industrial-ventilation-fan","switchboard"],"artwork":"edu-object-greenheck-usf-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-usf-fan","illustration":"https://eloragrid.ai/library/illustrations/greenheck-usf-fan.svg"},{"slug":"greenheck-aph-plenum-fan","name":"Greenheck APH plenum fan","kind":"object","abbreviation":"APH plenum fan","aliases":["APH plenum fan","APH plenum fan CAD","APH plenum fan general arrangement","APH plenum fan panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck APH plenum fan is a industrial ventilation fan product family referenced for electrical equipment layout.","description":["Greenheck APH plenum fan is a industrial ventilation fan product family referenced for electrical equipment layout.","Coordinate mounting, air direction, service access and power/control connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck APH plenum fan from the official public resource. Plenum fan family; coordinate the actual motor and mounting arrangement.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate mounting, air direction, service access and power/control connections.","A fan model must be selected for the documented system resistance and airflow duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate mounting, air direction, service access and power/control connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fan model must be selected for the documented system resistance and airflow duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"APH plenum fan"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Plenum fan family; coordinate the actual motor and mounting arrangement."}],"references":[{"sourceId":"pub-object-greenheck-fans","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-industrial-ventilation-fan","switchboard"],"artwork":"edu-object-greenheck-aph-plenum-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-aph-plenum-fan","illustration":"https://eloragrid.ai/library/illustrations/greenheck-aph-plenum-fan.svg"},{"slug":"greenheck-sbe-wall-fan","name":"Greenheck SBE wall fan","kind":"object","abbreviation":"SBE wall fan","aliases":["SBE wall fan","SBE wall fan CAD","SBE wall fan general arrangement","SBE wall fan panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck SBE wall fan is a industrial ventilation fan product family referenced for electrical equipment layout.","description":["Greenheck SBE wall fan is a industrial ventilation fan product family referenced for electrical equipment layout.","Coordinate mounting, air direction, service access and power/control connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck SBE wall fan from the official public resource. Sidewall fan family; reserve the selected service and airflow zones.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate mounting, air direction, service access and power/control connections.","A fan model must be selected for the documented system resistance and airflow duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate mounting, air direction, service access and power/control connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fan model must be selected for the documented system resistance and airflow duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"SBE wall fan"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Sidewall fan family; reserve the selected service and airflow zones."}],"references":[{"sourceId":"pub-object-greenheck-wallfans","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-industrial-ventilation-fan","switchboard"],"artwork":"edu-object-greenheck-sbe-wall-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-sbe-wall-fan","illustration":"https://eloragrid.ai/library/illustrations/greenheck-sbe-wall-fan.svg"},{"slug":"greenheck-sbs-wall-fan","name":"Greenheck SBS wall fan","kind":"object","abbreviation":"SBS wall fan","aliases":["SBS wall fan","SBS wall fan CAD","SBS wall fan general arrangement","SBS wall fan panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck SBS wall fan is a industrial ventilation fan product family referenced for electrical equipment layout.","description":["Greenheck SBS wall fan is a industrial ventilation fan product family referenced for electrical equipment layout.","Coordinate mounting, air direction, service access and power/control connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck SBS wall fan from the official public resource. Sidewall supply-fan family; distinguish air direction in the GA and ventilation schedule.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate mounting, air direction, service access and power/control connections.","A fan model must be selected for the documented system resistance and airflow duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate mounting, air direction, service access and power/control connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fan model must be selected for the documented system resistance and airflow duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"SBS wall fan"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Sidewall supply-fan family; distinguish air direction in the GA and ventilation schedule."}],"references":[{"sourceId":"pub-object-greenheck-wallfans","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-industrial-ventilation-fan","switchboard"],"artwork":"edu-object-greenheck-sbs-wall-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-sbs-wall-fan","illustration":"https://eloragrid.ai/library/illustrations/greenheck-sbs-wall-fan.svg"},{"slug":"greenheck-se-wall-fan","name":"Greenheck SE wall fan","kind":"object","abbreviation":"SE wall fan","aliases":["SE wall fan","SE wall fan CAD","SE wall fan general arrangement","SE wall fan panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck SE wall fan is a industrial ventilation fan product family referenced for electrical equipment layout.","description":["Greenheck SE wall fan is a industrial ventilation fan product family referenced for electrical equipment layout.","Coordinate mounting, air direction, service access and power/control connections. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck SE wall fan from the official public resource. Sidewall exhaust-fan family; retain the complete size/suffix in the equipment schedule.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate mounting, air direction, service access and power/control connections.","A fan model must be selected for the documented system resistance and airflow duty."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate mounting, air direction, service access and power/control connections.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A fan model must be selected for the documented system resistance and airflow duty.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"SE wall fan"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Sidewall exhaust-fan family; retain the complete size/suffix in the equipment schedule."}],"references":[{"sourceId":"pub-object-greenheck-wallfans","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-industrial-ventilation-fan","switchboard"],"artwork":"edu-object-greenheck-se-wall-fan","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-se-wall-fan","illustration":"https://eloragrid.ai/library/illustrations/greenheck-se-wall-fan.svg"},{"slug":"greenheck-esd-435-louver","name":"Greenheck ESD-435 louver","kind":"object","abbreviation":"ESD-435 louver","aliases":["ESD-435 louver","ESD-435 louver CAD","ESD-435 louver general arrangement","ESD-435 louver panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck ESD-435 louver is a ventilation intake louver product family referenced for electrical equipment layout.","description":["Greenheck ESD-435 louver is a ventilation intake louver product family referenced for electrical equipment layout.","Coordinate free-air path, mounting, drainage and surrounding obstructions. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck ESD-435 louver from the official public resource. Select aperture size, mounting and installation details; no universal free area is stated.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate free-air path, mounting, drainage and surrounding obstructions.","Overall opening area does not equal the louver's effective free area."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate free-air path, mounting, drainage and surrounding obstructions.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Overall opening area does not equal the louver's effective free area.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"ESD-435 louver"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Select aperture size, mounting and installation details; no universal free area is stated."}],"references":[{"sourceId":"pub-object-greenheck-louvers","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-ventilation-intake-louver","switchboard"],"artwork":"edu-object-greenheck-esd-435-louver","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-esd-435-louver","illustration":"https://eloragrid.ai/library/illustrations/greenheck-esd-435-louver.svg"},{"slug":"greenheck-esd-635-louver","name":"Greenheck ESD-635 louver","kind":"object","abbreviation":"ESD-635 louver","aliases":["ESD-635 louver","ESD-635 louver CAD","ESD-635 louver general arrangement","ESD-635 louver panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck ESD-635 louver is a ventilation intake louver product family referenced for electrical equipment layout.","description":["Greenheck ESD-635 louver is a ventilation intake louver product family referenced for electrical equipment layout.","Coordinate free-air path, mounting, drainage and surrounding obstructions. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck ESD-635 louver from the official public resource. Select aperture size, mounting and installation details; distinguish this model from other ESD variants.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate free-air path, mounting, drainage and surrounding obstructions.","Overall opening area does not equal the louver's effective free area."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate free-air path, mounting, drainage and surrounding obstructions.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Overall opening area does not equal the louver's effective free area.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"ESD-635 louver"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Select aperture size, mounting and installation details; distinguish this model from other ESD variants."}],"references":[{"sourceId":"pub-object-greenheck-louvers","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-ventilation-intake-louver","switchboard"],"artwork":"edu-object-greenheck-esd-635-louver","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-esd-635-louver","illustration":"https://eloragrid.ai/library/illustrations/greenheck-esd-635-louver.svg"},{"slug":"greenheck-afl-501-louver","name":"Greenheck AFL-501 louver","kind":"object","abbreviation":"AFL-501 louver","aliases":["AFL-501 louver","AFL-501 louver CAD","AFL-501 louver general arrangement","AFL-501 louver panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck AFL-501 louver is a ventilation intake louver product family referenced for electrical equipment layout.","description":["Greenheck AFL-501 louver is a ventilation intake louver product family referenced for electrical equipment layout.","Coordinate free-air path, mounting, drainage and surrounding obstructions. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck AFL-501 louver from the official public resource. Select exact model size and documented installation; project suitability requires the official submittal.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate free-air path, mounting, drainage and surrounding obstructions.","Overall opening area does not equal the louver's effective free area."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate free-air path, mounting, drainage and surrounding obstructions.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"Overall opening area does not equal the louver's effective free area.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"AFL-501 louver"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Select exact model size and documented installation; project suitability requires the official submittal."}],"references":[{"sourceId":"pub-object-greenheck-louvercad","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-ventilation-intake-louver","switchboard"],"artwork":"edu-object-greenheck-afl-501-louver","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-afl-501-louver","illustration":"https://eloragrid.ai/library/illustrations/greenheck-afl-501-louver.svg"},{"slug":"greenheck-fsd-311-damper","name":"Greenheck FSD-311 damper","kind":"object","abbreviation":"FSD-311 damper","aliases":["FSD-311 damper","FSD-311 damper CAD","FSD-311 damper general arrangement","FSD-311 damper panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck FSD-311 damper is a combined fire-smoke damper product family referenced for electrical equipment layout.","description":["Greenheck FSD-311 damper is a combined fire-smoke damper product family referenced for electrical equipment layout.","Coordinate the tested installation detail, actuator clearance and inspection access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck FSD-311 damper from the official public resource. Coordinate selected sleeve, actuator and installation detail; the conceptual envelope is not a certified installation.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate the tested installation detail, actuator clearance and inspection access.","A combined product classification does not establish compliance of the surrounding wall or duct penetration."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate the tested installation detail, actuator clearance and inspection access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A combined product classification does not establish compliance of the surrounding wall or duct penetration.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"FSD-311 damper"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Coordinate selected sleeve, actuator and installation detail; the conceptual envelope is not a certified installation."}],"references":[{"sourceId":"pub-object-greenheck-fsd311","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-combined-fire-smoke-damper","switchboard"],"artwork":"edu-object-greenheck-fsd-311-damper","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-fsd-311-damper","illustration":"https://eloragrid.ai/library/illustrations/greenheck-fsd-311-damper.svg"},{"slug":"greenheck-fsd-211-damper","name":"Greenheck FSD-211 damper","kind":"object","abbreviation":"FSD-211 damper","aliases":["FSD-211 damper","FSD-211 damper CAD","FSD-211 damper general arrangement","FSD-211 damper panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck FSD-211 damper is a combined fire-smoke damper product family referenced for electrical equipment layout.","description":["Greenheck FSD-211 damper is a combined fire-smoke damper product family referenced for electrical equipment layout.","Coordinate the tested installation detail, actuator clearance and inspection access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck FSD-211 damper from the official public resource. Select the complete model and associated actuator/installation detail from the official resource.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate the tested installation detail, actuator clearance and inspection access.","A combined product classification does not establish compliance of the surrounding wall or duct penetration."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate the tested installation detail, actuator clearance and inspection access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A combined product classification does not establish compliance of the surrounding wall or duct penetration.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"FSD-211 damper"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Select the complete model and associated actuator/installation detail from the official resource."}],"references":[{"sourceId":"pub-object-greenheck-dampers","relevance":"Official public equipment-family identity and documentation route; exact model must be selected."}],"related":["ga-combined-fire-smoke-damper","switchboard"],"artwork":"edu-object-greenheck-fsd-211-damper","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-fsd-211-damper","illustration":"https://eloragrid.ai/library/illustrations/greenheck-fsd-211-damper.svg"},{"slug":"greenheck-fd-150-damper","name":"Greenheck FD-150 damper","kind":"object","abbreviation":"FD-150 damper","aliases":["FD-150 damper","FD-150 damper CAD","FD-150 damper general arrangement","FD-150 damper panel layout"],"category":"equipment-layouts","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"Greenheck FD-150 damper is a fire damper product family referenced for electrical equipment layout.","description":["Greenheck FD-150 damper is a fire damper product family referenced for electrical equipment layout.","Coordinate the selected tested installation detail and inspection access. The GA locates the physical item; the associated schematic or equipment schedule records its electrical interfaces.","This record identifies Greenheck FD-150 damper from the official public resource. Select exact size, mounting orientation and the documented static-fire-damper installation.","The preview is independent educational geometry and is not a manufacturer outline, fabrication drawing or verified standard graphic. Obtain the applicable model drawing from the cited official source before making a dimensional layout."],"readingNotes":["Coordinate the selected tested installation detail and inspection access.","A generic damper icon does not demonstrate a compliant fire-rated penetration."],"drawingChecklist":["Confirm the exact equipment identity, drawing revision and installation orientation.","Coordinate the selected tested installation detail and inspection access.","Cross-reference the terminals, cable routes and service tasks with the equipment schedule."],"distinction":"A generic damper icon does not demonstrate a compliant fire-rated penetration.","facts":[{"label":"Record type","value":"Manufacturer product family"},{"label":"Drawing role","value":"Physical location and interface coordination"},{"label":"Dimensions","value":"Not specified here; use the selected manufacturer drawing"},{"label":"Artwork","value":"Original conceptual envelope; unitless and not to scale"},{"label":"Manufacturer / publisher","value":"Greenheck"},{"label":"Published family / model","value":"FD-150 damper"},{"label":"Market verification","value":"Source region and selected catalogue number must be checked; no regional approval is inferred"},{"label":"Configuration note","value":"Select exact size, mounting orientation and documented static-fire-damper installation; consult the official current product documents."}],"references":[{"sourceId":"pub-object-greenheck-fd150","relevance":"Official FD-150 static-rated fire damper identity and current document route; no certification of this concept drawing is implied."}],"related":["ga-fire-damper","switchboard"],"artwork":"edu-object-greenheck-fd-150-damper","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/greenheck-fd-150-damper","illustration":"https://eloragrid.ai/library/illustrations/greenheck-fd-150-damper.svg"},{"slug":"ga-cable-joint","name":"Power cable joint","kind":"object","abbreviation":"CABLE JOINT","aliases":["cable joint","power cable splice","MV cable joint","inline cable joint","underground cable splice"],"category":"connections-wiring","drawingTypes":["GA","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An assembly joining power-cable sections while maintaining the required conductor, insulation, screen and environmental interfaces.","description":["A power cable joint connects cable sections as an installed assembly. The selected joint must be compatible with the cable construction and its conductor, insulation, screen and environmental interfaces.","In a GA or cable-routing drawing, locate the joint bay or connection position and coordinate space for jointing work, cable approach and the completed assembly. Reference the cable schedule and selected manufacturer instructions rather than inferring a kit from a generic outline."],"readingNotes":["Identify the circuits and cable sections joined at the marked location, including screen or neutral continuity.","A joint extends a cable route; a termination connects a cable to equipment or another defined interface."],"drawingChecklist":["Cross-reference the circuit identifier and both cable section specifications.","Identify the selected joint kit and installation instructions for the actual cable construction.","Coordinate joint location, cable approach, accessibility and space for the installed assembly."],"distinction":"A control-wire splice is a connection concept. A power-cable joint is an installed assembly that must also address insulation, shielding and environmental interfaces for the selected cable.","facts":[{"label":"Record type","value":"Generic cable-system GA object"},{"label":"Selection inputs","value":"Cable construction, conductor, insulation and screen interfaces; installation environment"},{"label":"Dimensions","value":"Use the selected joint kit documentation; no dimensions supplied here"}],"references":[{"sourceId":"public-cable-joints","relevance":"Public manufacturer overview confirms cable joint, splice, termination and grounding accessory applications."}],"related":["wire-splice","cable-ladder","ga-cable-gland"],"artwork":"original-power-cable-joint","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-cable-joint","illustration":"https://eloragrid.ai/library/illustrations/ga-cable-joint.svg"},{"slug":"ga-power-quality-meter","name":"Power quality meter","kind":"object","abbreviation":"PQM","aliases":["power quality analyser","power quality analyzer","power quality monitor","disturbance recorder meter","power-quality meter"],"category":"measurement-protection","drawingTypes":["GA","SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A measuring device used to monitor electrical quantities and documented power-quality events or waveform characteristics.","description":["A power quality meter measures electrical quantities and provides the power-quality monitoring functions documented for its model. Examples include waveform or disturbance recording and analysis of abnormal supply conditions. An ordinary energy meter should not be assumed to provide these functions.","Coordinate the installed meter or remote display, voltage and current inputs, auxiliary supply and communication interfaces. A complete drawing package links the GA location to the metering schematic and the configuration requirements for the monitoring system."],"readingNotes":["Read the selected model documentation to identify which measurements, event captures and recording functions are provided.","Trace voltage/current measurement channels separately from auxiliary power and network or time-reference connections."],"drawingChecklist":["Identify the exact meter model, installation form and display arrangement.","Cross-reference voltage inputs, CT connections, protection/test interfaces and auxiliary supply.","Show communication, time-reference and data-system interfaces required by the documented application."],"distinction":"Power-quality monitoring and energy registration overlap in some meters. A meter label or network connection alone does not prove the event capture, accuracy class or recording capabilities needed for a particular study.","facts":[{"label":"Record type","value":"Generic metering and monitoring GA object"},{"label":"Interface groups","value":"Measurement inputs, auxiliary supply, communication and any documented time reference"},{"label":"Capability verification","value":"Selected model manual and application configuration; no universal accuracy or recording specification asserted"}],"references":[{"sourceId":"public-power-quality-meter","relevance":"Public advanced energy and power-quality meter manual provides installation and operating context."}],"related":["current-transformer","voltage-transformer"],"artwork":"original-power-quality-meter","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/objects/ga-power-quality-meter","illustration":"https://eloragrid.ai/library/illustrations/ga-power-quality-meter.svg"},{"slug":"capacitor-voltage-transformer","name":"Capacitor voltage transformer","kind":"symbol","abbreviation":"CVT / CCVT","aliases":["capacitive voltage transformer","coupling capacitor voltage transformer","CVT","CCVT","capacitor potential transformer"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An instrument transformer using a capacitive voltage divider and an electromagnetic unit to supply documented voltage measurement or protection signals.","description":["A capacitor voltage transformer combines a capacitive divider with an electromagnetic unit to provide voltage signals for its documented metering or protection application. Manufacturer arrangements may also provide interfaces for power-line carrier equipment.","In a single line diagram, identify the high-voltage connection and the measurement or protection circuits served by the secondary outputs. The conceptual preview illustrates the operating arrangement; it is not a certified standard symbol or a manufacturer connection drawing."],"readingNotes":["Distinguish the capacitive divider and electromagnetic unit from a standalone coupling capacitor.","Trace the secondary circuits and any carrier interface using the selected model documentation rather than assuming they share the same connection."],"drawingChecklist":["Identify the exact CVT/CCVT equipment tag and the voltage circuit represented.","Reference the specified primary/secondary arrangement, measurement duties and secondary earthing details.","Cross-reference the manufacturer terminal diagram and any documented carrier or damping-system interfaces."],"distinction":"An inductive voltage transformer and a capacitor voltage transformer can both supply voltage signals, but their operating arrangements and transient behaviour differ. A coupling capacitor alone is not a complete CVT.","facts":[{"label":"Operating arrangement","value":"Capacitive divider plus electromagnetic unit; exact construction depends on manufacturer design"},{"label":"Code scope","value":"CVT and CCVT are common equipment abbreviations, not an assigned graphical-symbol identifier"},{"label":"Preview scope","value":"Independently drawn functional concept; not official standard artwork"}],"references":[{"sourceId":"public-cvt-cpb","relevance":"Public CVT application description supports metering, protection and optional carrier context."},{"sourceId":"public-cvt-working-principle","relevance":"Public manufacturer construction explanation supports the divider/electromagnetic-unit distinction."}],"related":["voltage-transformer","capacitor","current-transformer"],"artwork":"original-cvt-concept","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/capacitor-voltage-transformer","illustration":"https://eloragrid.ai/library/illustrations/capacitor-voltage-transformer.svg"},{"slug":"ansi-circuit-breaker","name":"ANSI/IEEE circuit breaker symbol","kind":"symbol","abbreviation":"CB","aliases":["IEEE circuit breaker symbol","ANSI circuit breaker symbol","HCB1"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for circuit breaker, with public vendor evidence and drawing-reading notes.","description":["The breaker representation identifies the interrupting device in an IEEE-oriented schematic library. Follow its two power connections before interpreting the operating or protection annotation; auxiliary contacts and trip coils belong to separately linked circuits.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["A one-line breaker endpoint does not expose every pole of the physical device.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State protected circuit","Record pole count","Cross-reference trip and auxiliary circuits"],"distinction":"The graphical breaker reference identifies equipment; ANSI device number 52 identifies an AC circuit-breaker function and is not a substitute glyph.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — 1 Pole Circuit Breakers"},{"label":"Public vendor block name","value":"HCB1 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-7f08a484-0517-4954-bd68-1648ddbc84a1","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["circuit-breaker","disconnector","load-break-switch","52-ac-circuit-breaker"],"artwork":"edu-ansi-circuit-breaker","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented 1 Pole Circuit Breakers functional form","counterpart":"circuit-breaker","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/ansi-circuit-breaker.svg"},{"slug":"ansi-thermal-circuit-breaker","name":"ANSI/IEEE thermal circuit breaker symbol","kind":"symbol","abbreviation":"CB TH","aliases":["IEEE thermal circuit breaker symbol","ANSI thermal circuit breaker symbol","HCB11TH"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for thermal circuit breaker, with public vendor evidence and drawing-reading notes.","description":["The thermal breaker form adds a temperature-responsive protection concept to the circuit-interruption path. Reading it requires both the overload characteristic and the device's short-circuit rating; the small protection modifier is not a complete time-current curve.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Keep the thermal function linked to the breaker it operates.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify thermal setting","Reference time-current data","State breaking rating"],"distinction":"A thermal qualifier describes protection response, while a trip-contact symbol describes a separate control connection.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — 1 Pole Circuit Breakers"},{"label":"Public vendor block name","value":"HCB11TH (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-7f08a484-0517-4954-bd68-1648ddbc84a1","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["thermal-circuit-breaker","circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-ansi-thermal-circuit-breaker","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented 1 Pole Circuit Breakers functional form","counterpart":"thermal-circuit-breaker","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-thermal-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/ansi-thermal-circuit-breaker.svg"},{"slug":"ansi-thermal-magnetic-circuit-breaker","name":"ANSI/IEEE thermal-magnetic circuit breaker symbol","kind":"symbol","abbreviation":"CB TM","aliases":["IEEE thermal-magnetic circuit breaker symbol","ANSI thermal-magnetic circuit breaker symbol","HCB11Q9"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for thermal-magnetic circuit breaker, with public vendor evidence and drawing-reading notes.","description":["The thermal-magnetic form combines two protection responses associated with the same breaker. An expanded drawing may show the operating path and additional functional marks, but device selection and coordination still depend on the scheduled breaker and trip data.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read thermal and magnetic operating information separately.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name breaker model","Document current and curve","Reference coordination study"],"distinction":"The combination is different from an electronic relay issuing a trip to an otherwise separately protected breaker.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — 1 Pole Circuit Breakers"},{"label":"Public vendor block name","value":"HCB11Q9 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-7f08a484-0517-4954-bd68-1648ddbc84a1","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["thermal-magnetic-circuit-breaker","circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-ansi-thermal-magnetic-circuit-breaker","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented 1 Pole Circuit Breakers functional form","counterpart":"thermal-magnetic-circuit-breaker","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-thermal-magnetic-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/ansi-thermal-magnetic-circuit-breaker.svg"},{"slug":"ansi-current-limiting-circuit-breaker","name":"ANSI/IEEE current-limiting circuit breaker symbol","kind":"symbol","abbreviation":"CB LIM","aliases":["IEEE current-limiting circuit breaker symbol","ANSI current-limiting circuit breaker symbol","HCB11THI"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for current-limiting circuit breaker, with public vendor evidence and drawing-reading notes.","description":["A current-limiting breaker form identifies a fault-interruption characteristic associated with the selected breaker. It does not depict continuous regulation of the feeder current. The limiting designation needs the applicable manufacturer's let-through information.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Associate the limiting annotation with the breaker rather than the load.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name limiting breaker","Reference peak/energy data","Identify prospective fault level"],"distinction":"Fault-current limitation is not the same circuit function as an adjustable current regulator.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — 1 Pole Circuit Breakers"},{"label":"Public vendor block name","value":"HCB11THI (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-7f08a484-0517-4954-bd68-1648ddbc84a1","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["current-limiting-circuit-breaker","circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-ansi-current-limiting-circuit-breaker","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented 1 Pole Circuit Breakers functional form","counterpart":"current-limiting-circuit-breaker","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-current-limiting-circuit-breaker","illustration":"https://eloragrid.ai/library/illustrations/ansi-current-limiting-circuit-breaker.svg"},{"slug":"ansi-circuit-breaker-with-undervoltage-release","name":"ANSI/IEEE circuit breaker with undervoltage release symbol","kind":"symbol","abbreviation":"CB UV","aliases":["IEEE circuit breaker with undervoltage release symbol","ANSI circuit breaker with undervoltage release symbol","HCB11Q33"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for circuit breaker with undervoltage release, with public vendor evidence and drawing-reading notes.","description":["This combined breaker form marks a current protective device with a documented loss-of-voltage operating function. The control-voltage path must be established from the actual equipment diagram because it can differ from the feeder voltage being interrupted.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Follow the release supply independently of the main feeder.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State release input","Show control terminals","Reference voltage-loss behaviour"],"distinction":"A breaker release and a voltage-measuring relay are different devices even when both contribute to the same trip sequence.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — 1 Pole Circuit Breakers"},{"label":"Public vendor block name","value":"HCB11Q33 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-7f08a484-0517-4954-bd68-1648ddbc84a1","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["circuit-breaker-with-undervoltage-release","circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-ansi-circuit-breaker-with-undervoltage-release","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented 1 Pole Circuit Breakers functional form","counterpart":"circuit-breaker-with-undervoltage-release","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-circuit-breaker-with-undervoltage-release","illustration":"https://eloragrid.ai/library/illustrations/ansi-circuit-breaker-with-undervoltage-release.svg"},{"slug":"ansi-circuit-breaker-with-electronic-trip-unit","name":"ANSI/IEEE circuit breaker with electronic trip unit symbol","kind":"symbol","abbreviation":"CB ETU","aliases":["IEEE circuit breaker with electronic trip unit symbol","ANSI circuit breaker with electronic trip unit symbol","HCB11Q138"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for circuit breaker with electronic trip unit, with public vendor evidence and drawing-reading notes.","description":["The electronic-relay breaker form places an electronic protective function in the documented breaker assembly. Input sensors, auxiliary supply where required and configured protection features need references beyond the simplified main-path drawing.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Locate the selected trip-unit record rather than deriving settings from the symbol.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify electronic trip unit","State sensor/rating data","Link settings document"],"distinction":"A generic breaker graphic with a number beside it does not establish a particular electronic trip-unit configuration.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — 1 Pole Circuit Breakers"},{"label":"Public vendor block name","value":"HCB11Q138 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-7f08a484-0517-4954-bd68-1648ddbc84a1","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["circuit-breaker-with-electronic-trip-unit","circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-ansi-circuit-breaker-with-electronic-trip-unit","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented 1 Pole Circuit Breakers functional form","counterpart":"circuit-breaker-with-electronic-trip-unit","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-circuit-breaker-with-electronic-trip-unit","illustration":"https://eloragrid.ai/library/illustrations/ansi-circuit-breaker-with-electronic-trip-unit.svg"},{"slug":"ansi-disconnector","name":"ANSI/IEEE disconnector symbol","kind":"symbol","abbreviation":"Isolator","aliases":["IEEE disconnector symbol","ANSI disconnector symbol","HDS11"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for disconnector, with public vendor evidence and drawing-reading notes.","description":["The IEEE-oriented disconnector form identifies a separable power-circuit path. Its operating state and main-device tag guide the reader to the isolation and interlocking information; electrical duty must be established from the specified equipment.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read a shown gap as a documented contact state, not a full operating instruction.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name disconnector","State reference position","Link electrical duty/interlocks"],"distinction":"A disconnector's isolation function is different from a protective device's automatic fault interruption.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Disconnect 1 Pole"},{"label":"Public vendor block name","value":"HDS11 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-7c62d3de-6494-4cbf-b3cf-3e3da309d6a4","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["disconnector","load-break-switch","circuit-breaker","earthing-switch"],"artwork":"edu-ansi-disconnector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Disconnect 1 Pole functional form","counterpart":"disconnector","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-disconnector","illustration":"https://eloragrid.ai/library/illustrations/ansi-disconnector.svg"},{"slug":"ansi-switch-disconnector","name":"ANSI/IEEE switch-disconnector symbol","kind":"symbol","abbreviation":"SD","aliases":["IEEE switch-disconnector symbol","ANSI switch-disconnector symbol","HDS11Q69"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for switch-disconnector, with public vendor evidence and drawing-reading notes.","description":["A switch-disconnector representation identifies operational switching combined with a documented isolation function. The distinction matters when selecting a library element for a feeder that must both switch its assigned load and provide isolation.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["The equipment label must confirm both functions.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State utilization duty","Identify isolation designation","Show connected poles"],"distinction":"A disconnector and a switch-disconnector can share a family of contact graphics without sharing the same switching duty.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Disconnect 1 Pole"},{"label":"Public vendor block name","value":"HDS11Q69 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-7c62d3de-6494-4cbf-b3cf-3e3da309d6a4","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["switch-disconnector","disconnector","circuit-breaker"],"artwork":"edu-ansi-switch-disconnector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Disconnect 1 Pole functional form","counterpart":"switch-disconnector","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-switch-disconnector","illustration":"https://eloragrid.ai/library/illustrations/ansi-switch-disconnector.svg"},{"slug":"ansi-lockable-disconnector","name":"ANSI/IEEE lockable disconnector symbol","kind":"symbol","abbreviation":"DS LOCK","aliases":["IEEE lockable disconnector symbol","ANSI lockable disconnector symbol","HDS11Q73"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for lockable disconnector, with public vendor evidence and drawing-reading notes.","description":["This form combines a disconnector power path with a locking provision. The drawing reader needs the lockable position and mechanism reference so a lock mark does not become an unsupported claim about all possible device positions.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Match the lock reference to the operator assembly.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State lockable position","Identify mechanism","Cross-reference interlocks"],"distinction":"Lockability describes mechanical retention; it does not increase electrical interrupting capability.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Disconnect 1 Pole"},{"label":"Public vendor block name","value":"HDS11Q73 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-7c62d3de-6494-4cbf-b3cf-3e3da309d6a4","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["lockable-disconnector","disconnector","circuit-breaker"],"artwork":"edu-ansi-lockable-disconnector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Disconnect 1 Pole functional form","counterpart":"lockable-disconnector","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-lockable-disconnector","illustration":"https://eloragrid.ai/library/illustrations/ansi-lockable-disconnector.svg"},{"slug":"ansi-lockable-switch-disconnector","name":"ANSI/IEEE lockable switch-disconnector symbol","kind":"symbol","abbreviation":"SD LOCK","aliases":["IEEE lockable switch-disconnector symbol","ANSI lockable switch-disconnector symbol","HDS11Q77"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for lockable switch-disconnector, with public vendor evidence and drawing-reading notes.","description":["The lockable switch-disconnector form combines load switching, isolation and a documented locking provision. These are separate capabilities recorded against the same device, rather than inferred from a single contact gap or padlock outline.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Identify the permitted locking state in the operator schedule.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Record switching duty","State locking position","Reference handle arrangement"],"distinction":"Adding a locking modifier to a switch does not prove that it has the isolation function of a switch-disconnector.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Disconnect 1 Pole"},{"label":"Public vendor block name","value":"HDS11Q77 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-7c62d3de-6494-4cbf-b3cf-3e3da309d6a4","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["lockable-switch-disconnector","disconnector","circuit-breaker"],"artwork":"edu-ansi-lockable-switch-disconnector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Disconnect 1 Pole functional form","counterpart":"lockable-switch-disconnector","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-lockable-switch-disconnector","illustration":"https://eloragrid.ai/library/illustrations/ansi-lockable-switch-disconnector.svg"},{"slug":"ansi-fused-switch","name":"ANSI/IEEE fused switch symbol","kind":"symbol","abbreviation":"SW FUSE","aliases":["IEEE fused switch symbol","ANSI fused switch symbol","HDS11F"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for fused switch, with public vendor evidence and drawing-reading notes.","description":["The fused-switch form keeps a fuse protective element associated with a switching path. Read the switch and fuse ratings independently, then follow the device tag to the complete assembly and replacement fuse schedule.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Do not interpret the fuse current as the switch's complete operational rating.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify assembly tag","Record fuse-link type/rating","Reference switch duty"],"distinction":"A combined fused-switch form is different from a bare fuse symbol and from a circuit breaker.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Fusible Disconnects"},{"label":"Public vendor block name","value":"HDS11F (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-e0fcf25a-b17f-491c-8d62-94980e5de33a","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["fused-switch","fuse","load-break-switch"],"artwork":"edu-ansi-fused-switch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Fusible Disconnects functional form","counterpart":"fused-switch","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-fused-switch","illustration":"https://eloragrid.ai/library/illustrations/ansi-fused-switch.svg"},{"slug":"ansi-fuse","name":"ANSI/IEEE fuse symbol","kind":"symbol","abbreviation":"FU","aliases":["IEEE fuse symbol","ANSI fuse symbol","HFU1"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for fuse, with public vendor evidence and drawing-reading notes.","description":["The fuse representation identifies a sacrificial protective element in a conductor path. The drawing requires its fuse designation and selected link data; a compact outline cannot establish the time-current category, voltage rating or breaking capacity.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace the conductor through the protective element rather than treating its outline as a terminal.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State fuse category","Record current/voltage rating","Reference breaking and coordination data"],"distinction":"A fuse graphic represents a fuse-link function; a fuse-switch includes an operating assembly as well.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Fuses"},{"label":"Public vendor block name","value":"HFU1 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-5cf1e8f7-6883-4c9b-9bb3-6cd1a9339ae5","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["fuse","circuit-breaker","load-break-switch","terminal"],"artwork":"edu-ansi-fuse","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Fuses functional form","counterpart":"fuse","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-fuse","illustration":"https://eloragrid.ai/library/illustrations/ansi-fuse.svg"},{"slug":"ansi-fuse-switch","name":"ANSI/IEEE fuse-switch symbol","kind":"symbol","abbreviation":"FUSE SW","aliases":["IEEE fuse-switch symbol","ANSI fuse-switch symbol","HFU1FS"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for fuse-switch, with public vendor evidence and drawing-reading notes.","description":["The fuse-switch form identifies a switching assembly involving a documented fuse element. The exact construction and operating arrangement belong to the product reference; drafting should retain both switching and protective meanings.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Keep the operating handle reference separate from the fuse-link tag.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify fuse-switch assembly","Name compatible links","Show main connections"],"distinction":"A fuse-switch is not merely a differently drawn circuit breaker.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Fuse Switches"},{"label":"Public vendor block name","value":"HFU1FS (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-7567d050-4515-48d5-8e9f-d037b996d366","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["fuse-switch","fuse","load-break-switch"],"artwork":"edu-ansi-fuse-switch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Fuse Switches functional form","counterpart":"fuse-switch","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-fuse-switch","illustration":"https://eloragrid.ai/library/illustrations/ansi-fuse-switch.svg"},{"slug":"ansi-current-transformer","name":"ANSI/IEEE current transformer symbol","kind":"symbol","abbreviation":"CT","aliases":["IEEE current transformer symbol","ANSI current transformer symbol","HXF1CT"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for current transformer, with public vendor evidence and drawing-reading notes.","description":["The current-transformer form identifies where a primary current is transformed into a measurement circuit. Its primary path and secondary leads are different circuits; CT ratio, polarity and metering or protection duty must be read from the annotation and equipment data.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Follow the primary conductor first, then the two secondary terminals.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State ratio and duty","Show secondary polarity","Cross-reference test terminals"],"distinction":"CT and VT forms both describe instrument transformers but connect to the power system in different ways.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Current Transformers"},{"label":"Public vendor block name","value":"HXF1CT (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-91c805d8-3b78-48a4-9ef0-39c462e3a164","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["current-transformer","voltage-transformer","ct-test-terminal","50-instantaneous-overcurrent"],"artwork":"edu-ansi-current-transformer","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Current Transformers functional form","counterpart":"current-transformer","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-current-transformer","illustration":"https://eloragrid.ai/library/illustrations/ansi-current-transformer.svg"},{"slug":"ansi-current-transformer-with-two-secondaries","name":"ANSI/IEEE current transformer with two secondaries symbol","kind":"symbol","abbreviation":"CT 2SEC","aliases":["IEEE current transformer with two secondaries symbol","ANSI current transformer with two secondaries symbol","HXF1T31"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for current transformer with two secondaries, with public vendor evidence and drawing-reading notes.","description":["This CT form identifies two documented secondary windings on a common magnetic circuit. Separate secondary connection paths must remain visible so a reader can follow their respective meters or relays without assuming independent cores.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Check loading and terminal data for both secondary circuits.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name each winding","State ratios/classes/burdens","Identify connected measurement devices"],"distinction":"Two secondary windings on a common magnetic circuit differ from two independently specified protection cores.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Current Transformers"},{"label":"Public vendor block name","value":"HXF1T31 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-91c805d8-3b78-48a4-9ef0-39c462e3a164","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["current-transformer-with-two-secondaries","current-transformer","ct-test-terminal"],"artwork":"edu-ansi-current-transformer-with-two-secondaries","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Current Transformers functional form","counterpart":"current-transformer-with-two-secondaries","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-current-transformer-with-two-secondaries","illustration":"https://eloragrid.ai/library/illustrations/ansi-current-transformer-with-two-secondaries.svg"},{"slug":"ansi-tapped-secondary-current-transformer","name":"ANSI/IEEE tapped-secondary current transformer symbol","kind":"symbol","abbreviation":"CT TAP","aliases":["IEEE tapped-secondary current transformer symbol","ANSI tapped-secondary current transformer symbol","HXF1T32"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for tapped-secondary current transformer, with public vendor evidence and drawing-reading notes.","description":["The tapped-secondary CT form marks alternative documented secondary connection points. The connected tap pair determines the operating transformation ratio; unused terminals remain subject to the actual transformer instructions rather than a generic drawing rule.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read the operational ratio from the wired tap combination.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Label tap terminals","State selected ratio","Reference unused-tap instructions"],"distinction":"A winding tap selects a documented connection ratio; it is not another independent measurement core.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Current Transformers"},{"label":"Public vendor block name","value":"HXF1T32 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-91c805d8-3b78-48a4-9ef0-39c462e3a164","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["tapped-secondary-current-transformer","current-transformer","ct-test-terminal"],"artwork":"edu-ansi-tapped-secondary-current-transformer","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Current Transformers functional form","counterpart":"tapped-secondary-current-transformer","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-tapped-secondary-current-transformer","illustration":"https://eloragrid.ai/library/illustrations/ansi-tapped-secondary-current-transformer.svg"},{"slug":"ansi-voltage-transformer","name":"ANSI/IEEE voltage transformer symbol","kind":"symbol","abbreviation":"VT / PT","aliases":["IEEE voltage transformer symbol","ANSI voltage transformer symbol","HXF1PT"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for voltage transformer, with public vendor evidence and drawing-reading notes.","description":["The potential-transformer form identifies a voltage measurement interface in the IEEE-oriented vendor library. Power connection, winding polarity and secondary protection are read as instrument-transformer information rather than as a general power-supply transformer.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace both primary voltage connections and the secondary input circuit.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State VT ratio","Identify primary/secondary terminals","Show protection and earthing references"],"distinction":"Potential transformer is a common name for a VT; a shared word does not make it a CT.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Transformers"},{"label":"Public vendor block name","value":"HXF1PT (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-68d02867-7a98-47d1-a83f-dbad1ddb616f","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["voltage-transformer","current-transformer","power-transformer","27-undervoltage"],"artwork":"edu-ansi-voltage-transformer","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Transformers functional form","counterpart":"voltage-transformer","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-voltage-transformer","illustration":"https://eloragrid.ai/library/illustrations/ansi-voltage-transformer.svg"},{"slug":"ansi-power-transformer","name":"ANSI/IEEE power transformer symbol","kind":"symbol","abbreviation":"TX","aliases":["IEEE power transformer symbol","ANSI power transformer symbol","HXF1T2"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for power transformer, with public vendor evidence and drawing-reading notes.","description":["The power-transformer form identifies magnetically coupled winding circuits supplying power. Its winding ratings and connection designations explain the electrical relationship; the drawing outline alone does not establish vector group, insulation rating or installation dimensions.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Identify primary and secondary circuit boundaries separately.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State winding voltages/power","Record connections/vector group","Reference neutral and protection details"],"distinction":"A power transformer and a voltage instrument transformer may share visual features while serving different circuit duties.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Transformers"},{"label":"Public vendor block name","value":"HXF1T2 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-68d02867-7a98-47d1-a83f-dbad1ddb616f","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["power-transformer","voltage-transformer","current-transformer","transformer-envelope"],"artwork":"edu-ansi-power-transformer","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Transformers functional form","counterpart":"power-transformer","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-power-transformer","illustration":"https://eloragrid.ai/library/illustrations/ansi-power-transformer.svg"},{"slug":"ansi-electrostatically-screened-transformer","name":"ANSI/IEEE electrostatically screened transformer symbol","kind":"symbol","abbreviation":"TX SCREEN","aliases":["IEEE electrostatically screened transformer symbol","ANSI electrostatically screened transformer symbol","HXF1T3"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for electrostatically screened transformer, with public vendor evidence and drawing-reading notes.","description":["The screened-transformer form identifies a separate electrostatic-screen feature associated with the windings. Follow the screen connection as its own conductor, with the manufacturer's designated earth or bonding arrangement.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["The screen lead is not an additional load winding.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify screen terminal","Show bonding connection","Reference selected transformer instructions"],"distinction":"An interwinding screen differs from the transformer's magnetic core and from a protective-earth symbol beside its enclosure.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Transformers"},{"label":"Public vendor block name","value":"HXF1T3 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-68d02867-7a98-47d1-a83f-dbad1ddb616f","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["electrostatically-screened-transformer","power-transformer","voltage-transformer"],"artwork":"edu-ansi-electrostatically-screened-transformer","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Transformers functional form","counterpart":"electrostatically-screened-transformer","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-electrostatically-screened-transformer","illustration":"https://eloragrid.ai/library/illustrations/ansi-electrostatically-screened-transformer.svg"},{"slug":"ansi-three-winding-transformer","name":"ANSI/IEEE three-winding transformer symbol","kind":"symbol","abbreviation":"TX 3W","aliases":["IEEE three-winding transformer symbol","ANSI three-winding transformer symbol","HXF1T6"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for three-winding transformer, with public vendor evidence and drawing-reading notes.","description":["The three-winding transformer form represents three coupled winding circuits with separately documented ratings. Each circuit must remain identifiable where one winding supplies a tertiary load, auxiliary circuit or another specified duty.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace all three winding circuits to their destinations.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State three winding ratings","Show terminal groups","Reference tertiary purpose/protection"],"distinction":"Three windings are different from three phase conductors belonging to one winding set.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Transformers"},{"label":"Public vendor block name","value":"HXF1T6 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-68d02867-7a98-47d1-a83f-dbad1ddb616f","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["three-winding-transformer","power-transformer","voltage-transformer"],"artwork":"edu-ansi-three-winding-transformer","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Transformers functional form","counterpart":"three-winding-transformer","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-three-winding-transformer","illustration":"https://eloragrid.ai/library/illustrations/ansi-three-winding-transformer.svg"},{"slug":"ansi-adjustable-ratio-transformer","name":"ANSI/IEEE adjustable-ratio transformer symbol","kind":"symbol","abbreviation":"TX ADJ","aliases":["IEEE adjustable-ratio transformer symbol","ANSI adjustable-ratio transformer symbol","HXF1T5"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for adjustable-ratio transformer, with public vendor evidence and drawing-reading notes.","description":["The adjustable transformer form identifies a documented change in winding ratio or connection. Its adjustment range and permissible operating condition must be supplied by the equipment record; an adjustment mark is not an on-load operating approval.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Locate the tap or adjustment connection before reading the supplied voltage.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State adjustment range","Identify selected position","Reference operating restrictions"],"distinction":"Adjustable-ratio representation does not establish that adjustment is permitted while energised.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Transformers"},{"label":"Public vendor block name","value":"HXF1T5 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-68d02867-7a98-47d1-a83f-dbad1ddb616f","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["adjustable-ratio-transformer","power-transformer","voltage-transformer"],"artwork":"edu-ansi-adjustable-ratio-transformer","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Transformers functional form","counterpart":"adjustable-ratio-transformer","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-adjustable-ratio-transformer","illustration":"https://eloragrid.ai/library/illustrations/ansi-adjustable-ratio-transformer.svg"},{"slug":"ansi-single-phase-autotransformer","name":"ANSI/IEEE single-phase autotransformer symbol","kind":"symbol","abbreviation":"AT 1PH","aliases":["IEEE single-phase autotransformer symbol","ANSI single-phase autotransformer symbol","HXF1P1AUTO"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for single-phase autotransformer, with public vendor evidence and drawing-reading notes.","description":["The single-phase autotransformer form identifies a shared winding path between input and output. Following that common electrical path explains why this device differs from two electrically separate windings even when the voltage transformation purpose is similar.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Locate the common winding terminal and the load tap.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State input/output voltages","Show common connection","Reference tap ratings"],"distinction":"An autotransformer does not provide the same winding separation as a two-winding transformer.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Transformers"},{"label":"Public vendor block name","value":"HXF1P1AUTO (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-68d02867-7a98-47d1-a83f-dbad1ddb616f","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["single-phase-autotransformer","power-transformer","voltage-transformer"],"artwork":"edu-ansi-single-phase-autotransformer","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Transformers functional form","counterpart":"single-phase-autotransformer","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-single-phase-autotransformer","illustration":"https://eloragrid.ai/library/illustrations/ansi-single-phase-autotransformer.svg"},{"slug":"ansi-reactor","name":"ANSI/IEEE reactor symbol","kind":"symbol","abbreviation":"L","aliases":["IEEE reactor symbol","ANSI reactor symbol","HRT1"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for reactor, with public vendor evidence and drawing-reading notes.","description":["The reactor form identifies an inductive component in the documented power circuit. Series or shunt connection establishes its placement, while the device schedule explains whether its intended duty concerns impedance, filtering or another application.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace the external connection before interpreting the inductive outline.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State circuit duty","Record current/impedance data","Reference equipment model"],"distinction":"A reactor's winding is not an additional transformer secondary unless magnetic coupling is explicitly part of the device.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Reactors"},{"label":"Public vendor block name","value":"HRT1 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-2246c552-4410-48ff-9e4b-05b6460b62f7","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["reactor","power-transformer","capacitor"],"artwork":"edu-ansi-reactor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Reactors functional form","counterpart":"reactor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-reactor","illustration":"https://eloragrid.ai/library/illustrations/ansi-reactor.svg"},{"slug":"ansi-iron-core-reactor","name":"ANSI/IEEE iron-core reactor symbol","kind":"symbol","abbreviation":"L IRON","aliases":["IEEE iron-core reactor symbol","ANSI iron-core reactor symbol","HRT1IC"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for iron-core reactor, with public vendor evidence and drawing-reading notes.","description":["The iron-core reactor form adds a magnetic-core construction qualifier to the inductive component. The modifier needs equipment data for current range and magnetic behaviour rather than an assumption that inductance stays constant under every condition.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Keep the magnetic qualifier attached to the identified winding.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State inductance/impedance","Record current rating","Reference core operating limits"],"distinction":"An iron-core reactor and an air-core reactor are different constructions, not different page orientations.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Reactors"},{"label":"Public vendor block name","value":"HRT1IC (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-2246c552-4410-48ff-9e4b-05b6460b62f7","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["iron-core-reactor","power-transformer","capacitor"],"artwork":"edu-ansi-iron-core-reactor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Reactors functional form","counterpart":"iron-core-reactor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-iron-core-reactor","illustration":"https://eloragrid.ai/library/illustrations/ansi-iron-core-reactor.svg"},{"slug":"ansi-gapped-core-inductor","name":"ANSI/IEEE gapped-core inductor symbol","kind":"symbol","abbreviation":"L GAP","aliases":["IEEE gapped-core inductor symbol","ANSI gapped-core inductor symbol","HRT1L3"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for gapped-core inductor, with public vendor evidence and drawing-reading notes.","description":["The gapped-core inductor form identifies a documented gap in the magnetic circuit. That gap is a construction detail affecting the selected component, while the electrical terminals remain the winding connections.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Do not read the magnetic gap as an open electrical circuit.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify winding terminals","State inductance/current rating","Reference core construction"],"distinction":"A core gap and a disconnector's contact gap describe different physical and electrical relationships.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Reactors"},{"label":"Public vendor block name","value":"HRT1L3 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-2246c552-4410-48ff-9e4b-05b6460b62f7","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["gapped-core-inductor","power-transformer","capacitor"],"artwork":"edu-ansi-gapped-core-inductor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Reactors functional form","counterpart":"gapped-core-inductor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-gapped-core-inductor","illustration":"https://eloragrid.ai/library/illustrations/ansi-gapped-core-inductor.svg"},{"slug":"ansi-adjustable-core-inductor","name":"ANSI/IEEE adjustable-core inductor symbol","kind":"symbol","abbreviation":"L ADJ","aliases":["IEEE adjustable-core inductor symbol","ANSI adjustable-core inductor symbol","HRT1L4"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for adjustable-core inductor, with public vendor evidence and drawing-reading notes.","description":["The adjustable inductor form combines a winding with an adjustment function. Its drawing must identify the adjusted parameter and the product's permitted range, rather than interpreting an arrow as a signal connection.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Separate the adjustment indication from the winding leads.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State inductance range","Identify adjustment method","Reference component limits"],"distinction":"An adjustment arrow does not represent an extra conducting terminal unless the actual device diagram says so.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Reactors"},{"label":"Public vendor block name","value":"HRT1L4 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-2246c552-4410-48ff-9e4b-05b6460b62f7","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["adjustable-core-inductor","power-transformer","capacitor"],"artwork":"edu-ansi-adjustable-core-inductor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Reactors functional form","counterpart":"adjustable-core-inductor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-adjustable-core-inductor","illustration":"https://eloragrid.ai/library/illustrations/ansi-adjustable-core-inductor.svg"},{"slug":"ansi-normally-open-contact","name":"ANSI/IEEE normally open contact symbol","kind":"symbol","abbreviation":"NO","aliases":["IEEE normally open contact symbol","ANSI normally open contact symbol","HCR21"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for normally open contact, with public vendor evidence and drawing-reading notes.","description":["The normally-open relay contact form describes an unoperated open connection in the named IEEE-oriented library. Device tag and terminal references establish which relay or operator controls it; the two conductors are followed as a control path independent of the coil's power circuit.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read the stated reference condition before analysing the operating sequence.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify parent device tag","Show terminal pair","Cross-reference operating element"],"distinction":"Normally open is a contact state. A complete relay contains operating and contact functions that may appear on different sheets.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays and Contacts"},{"label":"Public vendor block name","value":"HCR21 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["normally-open-contact","normally-closed-contact","changeover-contact","relay-coil"],"artwork":"edu-ansi-normally-open-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays and Contacts functional form","counterpart":"normally-open-contact","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-normally-open-contact","illustration":"https://eloragrid.ai/library/illustrations/ansi-normally-open-contact.svg"},{"slug":"ansi-normally-closed-contact","name":"ANSI/IEEE normally closed contact symbol","kind":"symbol","abbreviation":"NC","aliases":["IEEE normally closed contact symbol","ANSI normally closed contact symbol","HCR22"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for normally closed contact, with public vendor evidence and drawing-reading notes.","description":["The normally-closed relay contact form identifies a conducting path in its documented unoperated condition. The operating action changes that path; it does not tell the reader whether the controlled equipment is normally running or stopped.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Evaluate the controlled circuit in both reference and operated states.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State reference condition","Identify contact terminals","Link operating device"],"distinction":"A closed reference contact and a closed circuit breaker describe different devices and circuit duties.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays and Contacts"},{"label":"Public vendor block name","value":"HCR22 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["normally-closed-contact","normally-open-contact","changeover-contact","relay-coil"],"artwork":"edu-ansi-normally-closed-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays and Contacts functional form","counterpart":"normally-closed-contact","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-normally-closed-contact","illustration":"https://eloragrid.ai/library/illustrations/ansi-normally-closed-contact.svg"},{"slug":"ansi-changeover-contact","name":"ANSI/IEEE changeover contact symbol","kind":"symbol","abbreviation":"CO","aliases":["IEEE changeover contact symbol","ANSI changeover contact symbol","HCR23R"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for changeover contact, with public vendor evidence and drawing-reading notes.","description":["The Form C relay contact representation links a common connection to alternative contact paths. The reader must identify common, normally closed and normally open terminals, with transition timing specified separately where overlap matters.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace the common terminal to each throw using the stated reference state.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Label common/NO/NC","Identify parent relay","Reference transfer sequence"],"distinction":"Form C identifies a changeover contact arrangement; it does not by itself establish make-before-break behaviour.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays and Contacts"},{"label":"Public vendor block name","value":"HCR23R (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["changeover-contact","normally-open-contact","normally-closed-contact","selector-switch"],"artwork":"edu-ansi-changeover-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays and Contacts functional form","counterpart":"changeover-contact","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-changeover-contact","illustration":"https://eloragrid.ai/library/illustrations/ansi-changeover-contact.svg"},{"slug":"ansi-relay-coil","name":"ANSI/IEEE relay coil symbol","kind":"symbol","abbreviation":"Coil","aliases":["IEEE relay coil symbol","ANSI relay coil symbol","HCR1"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for relay coil, with public vendor evidence and drawing-reading notes.","description":["The relay-coil form marks the operating element associated with separately referenced contacts. Control supply and coil terminals are traced as one circuit, while the contacts can switch different supplies elsewhere on the schematic.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Use the device tag to gather all associated contacts.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State coil voltage/type","Identify coil terminals","Provide contact cross-references"],"distinction":"A relay operating element is different from one of its switched contacts, even when both share the same tag.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays and Contacts"},{"label":"Public vendor block name","value":"HCR1 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["relay-coil","normally-open-contact","normally-closed-contact","contactor"],"artwork":"edu-ansi-relay-coil","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays and Contacts functional form","counterpart":"relay-coil","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-relay-coil","illustration":"https://eloragrid.ai/library/illustrations/ansi-relay-coil.svg"},{"slug":"ansi-mechanically-latched-relay-coil","name":"ANSI/IEEE mechanically latched relay coil symbol","kind":"symbol","abbreviation":"K LATCH","aliases":["IEEE mechanically latched relay coil symbol","ANSI mechanically latched relay coil symbol","HLR1"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for mechanically latched relay coil, with public vendor evidence and drawing-reading notes.","description":["The latching relay form identifies an operating element whose mechanism retains a documented state. Its reset or release representation completes the circuit-reading sequence; removing the initiating command may not restore the initial position.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Find the reset path before deciding the state after the command ends.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify latch coil","Show reset/unlatch element","State retained contact position"],"distinction":"Mechanical retention and an electrical seal-in circuit achieve persistence through different arrangements.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays and Contacts"},{"label":"Public vendor block name","value":"HLR1 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["mechanically-latched-relay-coil","relay-coil","normally-open-contact"],"artwork":"edu-ansi-mechanically-latched-relay-coil","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays and Contacts functional form","counterpart":"mechanically-latched-relay-coil","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-mechanically-latched-relay-coil","illustration":"https://eloragrid.ai/library/illustrations/ansi-mechanically-latched-relay-coil.svg"},{"slug":"ansi-relay-reset-coil","name":"ANSI/IEEE relay reset coil symbol","kind":"symbol","abbreviation":"K RESET","aliases":["IEEE relay reset coil symbol","ANSI relay reset coil symbol","HLR2"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for relay reset coil, with public vendor evidence and drawing-reading notes.","description":["The reset-coil form is a separately drawn operating element of the associated latch relay. Its tag ties it to the retained mechanism rather than to a new unrelated relay, even if the reset appears on another rung.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Follow the reset command to the matching latch-device reference.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Match latch/reset tag","State reset supply","Reference controlled contacts"],"distinction":"A separately drawn reset coil is not an extra set of power contacts.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays and Contacts"},{"label":"Public vendor block name","value":"HLR2 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["relay-reset-coil","relay-coil","normally-open-contact"],"artwork":"edu-ansi-relay-reset-coil","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays and Contacts functional form","counterpart":"relay-reset-coil","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-relay-reset-coil","illustration":"https://eloragrid.ai/library/illustrations/ansi-relay-reset-coil.svg"},{"slug":"ansi-polarised-relay-coil","name":"ANSI/IEEE polarised relay coil symbol","kind":"symbol","abbreviation":"K POL","aliases":["IEEE polarised relay coil symbol","ANSI polarised relay coil symbol","HCR1POL"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for polarised relay coil, with public vendor evidence and drawing-reading notes.","description":["The polarised-relay form indicates a documented sensitivity to input polarity or direction. The schematic's terminal labels and polarity reference must remain intact when the element is rearranged, because page orientation does not establish electrical polarity.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Use terminal data to determine the operating polarity.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Mark input polarity","State operating range","Reference output behaviour"],"distinction":"Polarised operation differs from the polarity restriction introduced solely by a suppression diode on an ordinary relay coil.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays and Contacts"},{"label":"Public vendor block name","value":"HCR1POL (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["polarised-relay-coil","relay-coil","normally-open-contact"],"artwork":"edu-ansi-polarised-relay-coil","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays and Contacts functional form","counterpart":"polarised-relay-coil","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-polarised-relay-coil","illustration":"https://eloragrid.ai/library/illustrations/ansi-polarised-relay-coil.svg"},{"slug":"ansi-ac-relay-coil","name":"ANSI/IEEE ac relay coil symbol","kind":"symbol","abbreviation":"K AC","aliases":["IEEE ac relay coil symbol","ANSI ac relay coil symbol","HCR1AC"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for ac relay coil, with public vendor evidence and drawing-reading notes.","description":["The AC relay operating form belongs to a specified alternating-current control supply. Its coil rating includes the applicable voltage and frequency; contact ratings are a separate specification and may concern a different circuit.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Identify the AC control source feeding the coil.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State coil voltage/frequency","Show terminal pair","Link contact references"],"distinction":"AC coil suitability does not establish a contact's permitted DC switching duty.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays and Contacts"},{"label":"Public vendor block name","value":"HCR1AC (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["ac-relay-coil","relay-coil","normally-open-contact"],"artwork":"edu-ansi-ac-relay-coil","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays and Contacts functional form","counterpart":"ac-relay-coil","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-ac-relay-coil","illustration":"https://eloragrid.ai/library/illustrations/ansi-ac-relay-coil.svg"},{"slug":"ansi-relay-coil-with-diode-suppression","name":"ANSI/IEEE relay coil with diode suppression symbol","kind":"symbol","abbreviation":"K DIODE","aliases":["IEEE relay coil with diode suppression symbol","ANSI relay coil with diode suppression symbol","HCR1K33"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for relay coil with diode suppression, with public vendor evidence and drawing-reading notes.","description":["The diode-suppressed relay form combines the operating element with a documented suppression component. The coil and diode connection establishes polarity requirements and can affect release behaviour, so the assembled relay or socket diagram is relevant.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace suppression polarity before evaluating the control supply.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Mark coil polarity","Identify internal/external suppression","Reference release characteristics"],"distinction":"A coil suppression diode and a rectifier in the power path serve different circuit functions.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays with Suppression"},{"label":"Public vendor block name","value":"HCR1K33 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-538b6a25-1215-4f1b-a824-0181d01be721","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["relay-coil-with-diode-suppression","relay-coil","normally-open-contact"],"artwork":"edu-ansi-relay-coil-with-diode-suppression","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays with Suppression functional form","counterpart":"relay-coil-with-diode-suppression","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-relay-coil-with-diode-suppression","illustration":"https://eloragrid.ai/library/illustrations/ansi-relay-coil-with-diode-suppression.svg"},{"slug":"ansi-relay-coil-with-rc-suppression","name":"ANSI/IEEE relay coil with rc suppression symbol","kind":"symbol","abbreviation":"K RC","aliases":["IEEE relay coil with rc suppression symbol","ANSI relay coil with rc suppression symbol","HCR1K39"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for relay coil with rc suppression, with public vendor evidence and drawing-reading notes.","description":["The RC-suppressed relay form associates resistance and capacitance with the operating circuit. Its actual network location and compatibility come from the selected assembly, while the contact circuit remains separately referenced.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Determine whether suppression is in the coil, socket or external wiring.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Show network location","State coil supply","Reference compatible suppression module"],"distinction":"An RC network and a diode suppressor are different component arrangements, not interchangeable graphic decorations.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays with Suppression"},{"label":"Public vendor block name","value":"HCR1K39 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-538b6a25-1215-4f1b-a824-0181d01be721","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["relay-coil-with-rc-suppression","relay-coil","normally-open-contact"],"artwork":"edu-ansi-relay-coil-with-rc-suppression","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays with Suppression functional form","counterpart":"relay-coil-with-rc-suppression","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-relay-coil-with-rc-suppression","illustration":"https://eloragrid.ai/library/illustrations/ansi-relay-coil-with-rc-suppression.svg"},{"slug":"ansi-on-delay-timer-relay","name":"ANSI/IEEE on-delay timer relay symbol","kind":"symbol","abbreviation":"TON","aliases":["IEEE on-delay timer relay symbol","ANSI on-delay timer relay symbol","HTD1N"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for on-delay timer relay, with public vendor evidence and drawing-reading notes.","description":["The on-delay timer operating form identifies a timing element whose specified output transition is postponed after initiation. Trigger, auxiliary supply and delayed output are distinct circuit information, even when the timer assembly combines them.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read the start and reset conditions from the timer timing chart.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify trigger circuit","State delay setting","Link delayed contacts"],"distinction":"An on-delay operating element differs from a delayed contact drawn separately under the same timer tag.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Time Delay Relays"},{"label":"Public vendor block name","value":"HTD1N (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-bbff0443-6ea2-4a05-a761-f411e16ba070","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["on-delay-timer-relay","relay-coil","normally-closed-contact"],"artwork":"edu-ansi-on-delay-timer-relay","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Time Delay Relays functional form","counterpart":"on-delay-timer-relay","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-on-delay-timer-relay","illustration":"https://eloragrid.ai/library/illustrations/ansi-on-delay-timer-relay.svg"},{"slug":"ansi-off-delay-timer-relay","name":"ANSI/IEEE off-delay timer relay symbol","kind":"symbol","abbreviation":"TOFF","aliases":["IEEE off-delay timer relay symbol","ANSI off-delay timer relay symbol","HTD1F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for off-delay timer relay, with public vendor evidence and drawing-reading notes.","description":["The off-delay timer form identifies timing after a documented initiating condition is removed. The selected device's supply requirements and timing sequence determine whether the delay can complete during control-power interruption.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace trigger removal separately from auxiliary supply loss.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Show trigger and supply","State off-delay interval","Reference supply-loss behaviour"],"distinction":"Off-delay timing is not an automatic statement of how every contact behaves after complete loss of power.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Time Delay Relays"},{"label":"Public vendor block name","value":"HTD1F (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-bbff0443-6ea2-4a05-a761-f411e16ba070","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["off-delay-timer-relay","relay-coil","normally-closed-contact"],"artwork":"edu-ansi-off-delay-timer-relay","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Time Delay Relays functional form","counterpart":"off-delay-timer-relay","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-off-delay-timer-relay","illustration":"https://eloragrid.ai/library/illustrations/ansi-off-delay-timer-relay.svg"},{"slug":"ansi-maintained-normally-open-contact","name":"ANSI/IEEE maintained normally-open contact symbol","kind":"symbol","abbreviation":"NO HOLD","aliases":["IEEE maintained normally-open contact symbol","ANSI maintained normally-open contact symbol","HCR2122F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for maintained normally-open contact, with public vendor evidence and drawing-reading notes.","description":["The maintained NO contact form combines a normally-open reference state with documented retention of an operated position. Its release or return mechanism needs a link so the reader does not assume momentary operation.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Find the action that returns the maintained contact.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State initial and retained states","Identify mechanism reference","Document return action"],"distinction":"Maintained position describes retention; normally open describes the contact's reference state.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays and Contacts"},{"label":"Public vendor block name","value":"HCR2122F (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["maintained-normally-open-contact","normally-open-contact","normally-closed-contact"],"artwork":"edu-ansi-maintained-normally-open-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays and Contacts functional form","counterpart":"maintained-normally-open-contact","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-maintained-normally-open-contact","illustration":"https://eloragrid.ai/library/illustrations/ansi-maintained-normally-open-contact.svg"},{"slug":"ansi-maintained-normally-closed-contact","name":"ANSI/IEEE maintained normally-closed contact symbol","kind":"symbol","abbreviation":"NC HOLD","aliases":["IEEE maintained normally-closed contact symbol","ANSI maintained normally-closed contact symbol","HCR2222F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for maintained normally-closed contact, with public vendor evidence and drawing-reading notes.","description":["The maintained NC contact form adds a retention characteristic to the reference closed contact. Analysing a control sequence requires both the initial continuity and the stated retained operating condition.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Evaluate the next cycle only after identifying reset or return.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State reference state","Identify retained position","Link reset mechanism"],"distinction":"A maintained NC contact is not an off-delay contact unless timing is separately specified.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays and Contacts"},{"label":"Public vendor block name","value":"HCR2222F (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["maintained-normally-closed-contact","normally-open-contact","normally-closed-contact"],"artwork":"edu-ansi-maintained-normally-closed-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays and Contacts functional form","counterpart":"maintained-normally-closed-contact","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-maintained-normally-closed-contact","illustration":"https://eloragrid.ai/library/illustrations/ansi-maintained-normally-closed-contact.svg"},{"slug":"ansi-early-make-normally-open-contact","name":"ANSI/IEEE early-make normally-open contact symbol","kind":"symbol","abbreviation":"NO EARLY","aliases":["IEEE early-make normally-open contact symbol","ANSI early-make normally-open contact symbol","HCR217F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for early-make normally-open contact, with public vendor evidence and drawing-reading notes.","description":["The anticipated NO contact form identifies earlier operation relative to documented associated contacts. The common device reference supplies that comparison; the modifier does not assign a universal millisecond operating time.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Compare the linked contacts of the same mechanism.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name common device","Identify sequence reference contacts","State early-closing action"],"distinction":"Relative mechanical sequence differs from an electronic on-delay setting.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays and Contacts"},{"label":"Public vendor block name","value":"HCR217F (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["early-make-normally-open-contact","normally-open-contact","normally-closed-contact"],"artwork":"edu-ansi-early-make-normally-open-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays and Contacts functional form","counterpart":"early-make-normally-open-contact","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-early-make-normally-open-contact","illustration":"https://eloragrid.ai/library/illustrations/ansi-early-make-normally-open-contact.svg"},{"slug":"ansi-late-make-normally-open-contact","name":"ANSI/IEEE late-make normally-open contact symbol","kind":"symbol","abbreviation":"NO LATE","aliases":["IEEE late-make normally-open contact symbol","ANSI late-make normally-open contact symbol","HCR218F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for late-make normally-open contact, with public vendor evidence and drawing-reading notes.","description":["The delayed NO contact form identifies later operation in a documented contact sequence. The drafting reference must say which contacts or mechanism establish the sequence rather than interpreting geometric spacing as a time interval.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read the selected device's contact sequence.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify common operator","Label late-closing transition","Reference sequence documentation"],"distinction":"A delayed sequence qualifier is not necessarily an independently adjustable timer function.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays and Contacts"},{"label":"Public vendor block name","value":"HCR218F (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["late-make-normally-open-contact","normally-open-contact","normally-closed-contact"],"artwork":"edu-ansi-late-make-normally-open-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays and Contacts functional form","counterpart":"late-make-normally-open-contact","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-late-make-normally-open-contact","illustration":"https://eloragrid.ai/library/illustrations/ansi-late-make-normally-open-contact.svg"},{"slug":"ansi-early-break-normally-closed-contact","name":"ANSI/IEEE early-break normally-closed contact symbol","kind":"symbol","abbreviation":"NC EARLY","aliases":["IEEE early-break normally-closed contact symbol","ANSI early-break normally-closed contact symbol","HCR227F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for early-break normally-closed contact, with public vendor evidence and drawing-reading notes.","description":["The anticipated NC contact form identifies opening earlier in a documented mechanism sequence. That order matters only relative to associated contacts and their common operator, which should remain linked across sheets.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace which path is interrupted before the other contacts move.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Link common device","Label early opening","Reference comparison contacts"],"distinction":"Early break is an operating sequence, not an overcurrent protection pickup characteristic.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays and Contacts"},{"label":"Public vendor block name","value":"HCR227F (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["early-break-normally-closed-contact","normally-open-contact","normally-closed-contact"],"artwork":"edu-ansi-early-break-normally-closed-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays and Contacts functional form","counterpart":"early-break-normally-closed-contact","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-early-break-normally-closed-contact","illustration":"https://eloragrid.ai/library/illustrations/ansi-early-break-normally-closed-contact.svg"},{"slug":"ansi-late-break-normally-closed-contact","name":"ANSI/IEEE late-break normally-closed contact symbol","kind":"symbol","abbreviation":"NC LATE","aliases":["IEEE late-break normally-closed contact symbol","ANSI late-break normally-closed contact symbol","HCR228F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for late-break normally-closed contact, with public vendor evidence and drawing-reading notes.","description":["The delayed NC contact form identifies opening later in a specified contact sequence. The circuit reader needs to understand the path that remains continuous while other associated contacts have already changed state.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read late operation against the common-device sequence.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify linked contacts","Label late opening","Reference mechanism data"],"distinction":"A mechanical late-break contact and an off-delay timer output can serve different timing arrangements.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Relays and Contacts"},{"label":"Public vendor block name","value":"HCR228F (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f8eac387-53cf-45fe-be6a-c0c8fb3c1b22","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["late-break-normally-closed-contact","normally-open-contact","normally-closed-contact"],"artwork":"edu-ansi-late-break-normally-closed-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Relays and Contacts functional form","counterpart":"late-break-normally-closed-contact","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-late-break-normally-closed-contact","illustration":"https://eloragrid.ai/library/illustrations/ansi-late-break-normally-closed-contact.svg"},{"slug":"ansi-motor-overload-trip-nc-contact","name":"ANSI/IEEE motor overload trip nc contact symbol","kind":"symbol","abbreviation":"OL NC","aliases":["IEEE motor overload trip nc contact symbol","ANSI motor overload trip nc contact symbol","HOL22"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for motor overload trip nc contact, with public vendor evidence and drawing-reading notes.","description":["The overload NC contact form is an auxiliary connection linked to the motor overload device. It is read in the control circuit, while overload-sensing elements remain in the motor power path or their documented measurement circuit.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Link the auxiliary contact to the overload element's tag.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify overload device","Show control terminals","Reference trip/reset action"],"distinction":"The overload auxiliary contact does not itself represent the motor's full-current power path.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Motor Control"},{"label":"Public vendor block name","value":"HOL22 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-3b645a95-bc10-4fa4-8bbf-9a5fff6be802","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["motor-overload-trip-nc-contact","normally-open-contact","normally-closed-contact"],"artwork":"edu-ansi-motor-overload-trip-nc-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Motor Control functional form","counterpart":"motor-overload-trip-nc-contact","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-motor-overload-trip-nc-contact","illustration":"https://eloragrid.ai/library/illustrations/ansi-motor-overload-trip-nc-contact.svg"},{"slug":"ansi-motor-overload-alarm-no-contact","name":"ANSI/IEEE motor overload alarm no contact symbol","kind":"symbol","abbreviation":"OL NO","aliases":["IEEE motor overload alarm no contact symbol","ANSI motor overload alarm no contact symbol","HOL21"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for motor overload alarm no contact, with public vendor evidence and drawing-reading notes.","description":["The overload NO contact form identifies a signal path associated with overload-device operation. Its destination may be a lamp, controller or alarm circuit and is separate from the contact used to interrupt the motor command.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Verify the alarm contact state after reset.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Link overload tag","Show alarm destination","Reference contact sequence"],"distinction":"Overload alarm status and contactor closed-position status describe different equipment conditions.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Motor Control"},{"label":"Public vendor block name","value":"HOL21 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-3b645a95-bc10-4fa4-8bbf-9a5fff6be802","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["motor-overload-alarm-no-contact","normally-open-contact","normally-closed-contact"],"artwork":"edu-ansi-motor-overload-alarm-no-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Motor Control functional form","counterpart":"motor-overload-alarm-no-contact","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-motor-overload-alarm-no-contact","illustration":"https://eloragrid.ai/library/illustrations/ansi-motor-overload-alarm-no-contact.svg"},{"slug":"ansi-pushbutton-no","name":"ANSI/IEEE normally open pushbutton symbol","kind":"symbol","abbreviation":"PB NO","aliases":["IEEE normally open pushbutton symbol","ANSI normally open pushbutton symbol","HPB11"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for normally open pushbutton, with public vendor evidence and drawing-reading notes.","description":["The momentary NO pushbutton form associates an operator action with an initially open contact. Read the actuator and contact together, then identify the control path that becomes continuous while the button is operated.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Keep the operator's release action separate from any electrical holding circuit.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State operator function","Show contact terminals","Reference controlled circuit"],"distinction":"A momentary pushbutton returns mechanically; a latched pushbutton retains its position.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Push Buttons"},{"label":"Public vendor block name","value":"HPB11 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-863a2eb5-8ecd-4348-90c7-49a37de11b8b","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["pushbutton-no","pushbutton-nc","normally-open-contact","selector-switch"],"artwork":"edu-ansi-pushbutton-no","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Push Buttons functional form","counterpart":"pushbutton-no","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-pushbutton-no","illustration":"https://eloragrid.ai/library/illustrations/ansi-pushbutton-no.svg"},{"slug":"ansi-pushbutton-nc","name":"ANSI/IEEE normally closed pushbutton symbol","kind":"symbol","abbreviation":"PB NC","aliases":["IEEE normally closed pushbutton symbol","ANSI normally closed pushbutton symbol","HPB12"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for normally closed pushbutton, with public vendor evidence and drawing-reading notes.","description":["The momentary NC pushbutton form describes a normally continuous path opened by the operator. Its circuit role can be stop, inhibit or another command, but that purpose comes from the wiring and label rather than from NC alone.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Evaluate the path before, during and after operation.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name commanded function","Show terminal pair","State return behaviour"],"distinction":"An NC contact form does not by itself identify a complete emergency-stop safety circuit.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Push Buttons"},{"label":"Public vendor block name","value":"HPB12 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-863a2eb5-8ecd-4348-90c7-49a37de11b8b","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["pushbutton-nc","pushbutton-no","emergency-stop","normally-closed-contact"],"artwork":"edu-ansi-pushbutton-nc","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Push Buttons functional form","counterpart":"pushbutton-nc","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-pushbutton-nc","illustration":"https://eloragrid.ai/library/illustrations/ansi-pushbutton-nc.svg"},{"slug":"ansi-illuminated-normally-open-pushbutton","name":"ANSI/IEEE illuminated normally-open pushbutton symbol","kind":"symbol","abbreviation":"PB NO LAMP","aliases":["IEEE illuminated normally-open pushbutton symbol","ANSI illuminated normally-open pushbutton symbol","HPB11S75"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for illuminated normally-open pushbutton, with public vendor evidence and drawing-reading notes.","description":["The illuminated NO pushbutton form combines a manually operated contact and a lamp function in one operator assembly. The indication circuit needs its own supply and signal reference, because illumination does not necessarily track the contact position.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace the lamp and switch circuits independently.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify contact terminals","Identify lamp supply","State indicated condition"],"distinction":"An illuminated button and a push-to-test lamp combine different operator and indication functions.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Illuminated Push Buttons"},{"label":"Public vendor block name","value":"HPB11S75 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f7efade2-2944-42a1-a5b7-db6b64694806","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["illuminated-normally-open-pushbutton","pushbutton-no","pushbutton-nc"],"artwork":"edu-ansi-illuminated-normally-open-pushbutton","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Illuminated Push Buttons functional form","counterpart":"illuminated-normally-open-pushbutton","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-illuminated-normally-open-pushbutton","illustration":"https://eloragrid.ai/library/illustrations/ansi-illuminated-normally-open-pushbutton.svg"},{"slug":"ansi-illuminated-normally-closed-pushbutton","name":"ANSI/IEEE illuminated normally-closed pushbutton symbol","kind":"symbol","abbreviation":"PB NC LAMP","aliases":["IEEE illuminated normally-closed pushbutton symbol","ANSI illuminated normally-closed pushbutton symbol","HPB12S75"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for illuminated normally-closed pushbutton, with public vendor evidence and drawing-reading notes.","description":["The illuminated NC pushbutton form retains a normally-closed contact reference while adding a separate visual indication function. Circuit interpretation must establish both the switched control path and the condition energising the lamp.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["A lit actuator does not prove that its contact is open or closed.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State contact reference state","Show lamp terminals","Name indication meaning"],"distinction":"Contact state and lamp state are two separately documented properties of the same assembly.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Illuminated Push Buttons"},{"label":"Public vendor block name","value":"HPB12S75 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f7efade2-2944-42a1-a5b7-db6b64694806","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["illuminated-normally-closed-pushbutton","pushbutton-no","pushbutton-nc"],"artwork":"edu-ansi-illuminated-normally-closed-pushbutton","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Illuminated Push Buttons functional form","counterpart":"illuminated-normally-closed-pushbutton","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-illuminated-normally-closed-pushbutton","illustration":"https://eloragrid.ai/library/illustrations/ansi-illuminated-normally-closed-pushbutton.svg"},{"slug":"ansi-maintained-normally-open-pushbutton","name":"ANSI/IEEE maintained normally-open pushbutton symbol","kind":"symbol","abbreviation":"PB NO HOLD","aliases":["IEEE maintained normally-open pushbutton symbol","ANSI maintained normally-open pushbutton symbol","HPB11S76"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for maintained normally-open pushbutton, with public vendor evidence and drawing-reading notes.","description":["The non-auto-return NO pushbutton form identifies a retained operator condition. The control input can remain active after the user's initiating action, so the documented release mechanism is part of the drawing's functional meaning.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Find how the button returns before evaluating a repeated command.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State retained position","Identify release method","Reference contact terminals"],"distinction":"Mechanical retention is different from a controller remembering a momentary input.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Illuminated Push Buttons"},{"label":"Public vendor block name","value":"HPB11S76 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f7efade2-2944-42a1-a5b7-db6b64694806","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["maintained-normally-open-pushbutton","pushbutton-no","pushbutton-nc"],"artwork":"edu-ansi-maintained-normally-open-pushbutton","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Illuminated Push Buttons functional form","counterpart":"maintained-normally-open-pushbutton","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-maintained-normally-open-pushbutton","illustration":"https://eloragrid.ai/library/illustrations/ansi-maintained-normally-open-pushbutton.svg"},{"slug":"ansi-maintained-normally-closed-pushbutton","name":"ANSI/IEEE maintained normally-closed pushbutton symbol","kind":"symbol","abbreviation":"PB NC HOLD","aliases":["IEEE maintained normally-closed pushbutton symbol","ANSI maintained normally-closed pushbutton symbol","HPB12S76"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for maintained normally-closed pushbutton, with public vendor evidence and drawing-reading notes.","description":["The non-auto-return NC pushbutton form identifies a contact that is closed in its reference state and retained after the operator changes it. The release or reset description determines when continuity is restored.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace the circuit's permissive state through the retained operation.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State initial condition","Show reset/return mechanism","Name switched circuit"],"distinction":"A retained NC operator is not automatically an emergency-stop device.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Illuminated Push Buttons"},{"label":"Public vendor block name","value":"HPB12S76 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f7efade2-2944-42a1-a5b7-db6b64694806","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["maintained-normally-closed-pushbutton","pushbutton-no","pushbutton-nc"],"artwork":"edu-ansi-maintained-normally-closed-pushbutton","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Illuminated Push Buttons functional form","counterpart":"maintained-normally-closed-pushbutton","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-maintained-normally-closed-pushbutton","illustration":"https://eloragrid.ai/library/illustrations/ansi-maintained-normally-closed-pushbutton.svg"},{"slug":"ansi-selector-switch","name":"ANSI/IEEE selector switch symbol","kind":"symbol","abbreviation":"SS","aliases":["IEEE selector switch symbol","ANSI selector switch symbol","HSS112"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for selector switch, with public vendor evidence and drawing-reading notes.","description":["The two-position maintained selector form links an operator position to a defined contact state. A position/contact schedule supplies the full control meaning; the operator label alone cannot describe multiple contact blocks on the same handle.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read the selected position against the contact table.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name operator positions","Provide contact-state schedule","Identify terminal pairs"],"distinction":"Operator positions count mechanical choices, while poles count electrical paths.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Selector Switches"},{"label":"Public vendor block name","value":"HSS112 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-6a68e692-a1dd-4c48-a19f-86b13916830d","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["selector-switch","changeover-contact","pushbutton-no","normally-open-contact"],"artwork":"edu-ansi-selector-switch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Selector Switches functional form","counterpart":"selector-switch","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-selector-switch","illustration":"https://eloragrid.ai/library/illustrations/ansi-selector-switch.svg"},{"slug":"ansi-three-position-maintained-selector","name":"ANSI/IEEE three-position maintained selector symbol","kind":"symbol","abbreviation":"SEL 3 HOLD","aliases":["IEEE three-position maintained selector symbol","ANSI three-position maintained selector symbol","HSS113"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for three-position maintained selector, with public vendor evidence and drawing-reading notes.","description":["The three-position maintained selector form provides three stable choices in the named library. Each associated contact is interpreted through the complete position table, with a shared tag tying the operator and contact blocks together.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Check all three positions rather than treating the middle as an assumed off state.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Label positions","State every contact condition","Link common operator"],"distinction":"A stable centre position and a spring-return centre position describe different mechanisms.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — 3 Position Selector Switches"},{"label":"Public vendor block name","value":"HSS113 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-5b722789-b342-4708-8671-579360d15dca","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["three-position-maintained-selector","selector-switch","changeover-contact"],"artwork":"edu-ansi-three-position-maintained-selector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented 3 Position Selector Switches functional form","counterpart":"three-position-maintained-selector","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-three-position-maintained-selector","illustration":"https://eloragrid.ai/library/illustrations/ansi-three-position-maintained-selector.svg"},{"slug":"ansi-three-position-centre-return-selector","name":"ANSI/IEEE three-position centre-return selector symbol","kind":"symbol","abbreviation":"SEL 3 CRET","aliases":["IEEE three-position centre-return selector symbol","ANSI three-position centre-return selector symbol","HSS113B"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for three-position centre-return selector, with public vendor evidence and drawing-reading notes.","description":["The return-from-both selector form identifies an operator returning from either outer position to its documented rest position. The middle contact state and both momentary command states require explicit annotations.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read release behaviour for each outer command.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify rest position","State outer-command actions","Reference contact schedule"],"distinction":"Return to centre is an operator characteristic; centre off is an electrical contact condition.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — 3 Position Selector Switches"},{"label":"Public vendor block name","value":"HSS113B (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-5b722789-b342-4708-8671-579360d15dca","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["three-position-centre-return-selector","selector-switch","changeover-contact"],"artwork":"edu-ansi-three-position-centre-return-selector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented 3 Position Selector Switches functional form","counterpart":"three-position-centre-return-selector","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-three-position-centre-return-selector","illustration":"https://eloragrid.ai/library/illustrations/ansi-three-position-centre-return-selector.svg"},{"slug":"ansi-three-position-key-selector","name":"ANSI/IEEE three-position key selector symbol","kind":"symbol","abbreviation":"KEY SEL 3","aliases":["IEEE three-position key selector symbol","ANSI three-position key selector symbol","HSS11S40"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for three-position key selector, with public vendor evidence and drawing-reading notes.","description":["The key-operated three-position selector form combines a contact schedule with controlled operator access. Stable positions, return behaviour and key-removal restrictions must be supplied by the chosen operator assembly.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Identify where the key may be removed without assuming every position permits it.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Label three positions","State key-removal conditions","Reference terminal schedule"],"distinction":"Key access does not change the contacts' electrical ratings or establish an isolation function.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — 3 Position Selector Switches"},{"label":"Public vendor block name","value":"HSS11S40 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-5b722789-b342-4708-8671-579360d15dca","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["three-position-key-selector","selector-switch","changeover-contact"],"artwork":"edu-ansi-three-position-key-selector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented 3 Position Selector Switches functional form","counterpart":"three-position-key-selector","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-three-position-key-selector","illustration":"https://eloragrid.ai/library/illustrations/ansi-three-position-key-selector.svg"},{"slug":"ansi-four-position-maintained-selector","name":"ANSI/IEEE four-position maintained selector symbol","kind":"symbol","abbreviation":"SEL 4 HOLD","aliases":["IEEE four-position maintained selector symbol","ANSI four-position maintained selector symbol","HSS114"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for four-position maintained selector, with public vendor evidence and drawing-reading notes.","description":["The four-position maintained selector form supports four stable selections tied to a documented contact table. Position order matters when interpreting mode combinations, but physical rotation alone does not identify connected circuits.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Compare the drawing position order to the operator faceplate.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name four positions","Provide switching schedule","Link operator/contact tags"],"distinction":"Four stable positions do not necessarily mean four contact poles.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — 4 Position Selector Switches"},{"label":"Public vendor block name","value":"HSS114 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-52349d7d-b059-4758-845e-f20bab7cb734","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["four-position-maintained-selector","selector-switch","changeover-contact"],"artwork":"edu-ansi-four-position-maintained-selector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented 4 Position Selector Switches functional form","counterpart":"four-position-maintained-selector","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-four-position-maintained-selector","illustration":"https://eloragrid.ai/library/illustrations/ansi-four-position-maintained-selector.svg"},{"slug":"ansi-four-position-key-selector","name":"ANSI/IEEE four-position key selector symbol","kind":"symbol","abbreviation":"KEY SEL 4","aliases":["IEEE four-position key selector symbol","ANSI four-position key selector symbol","HSS11S46"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for four-position key selector, with public vendor evidence and drawing-reading notes.","description":["The four-position key-selector form combines multiple operating selections with a keyed mechanism. Its schematic references need consistent position numbering and the documented permissions for inserting or removing the key.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Follow each position through the linked contact schedule.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State position sequence","Record key-removal states","Identify contact blocks"],"distinction":"A multi-position key operator is not the same arrangement as several independent key switches.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — 4 Position Selector Switches"},{"label":"Public vendor block name","value":"HSS11S46 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-52349d7d-b059-4758-845e-f20bab7cb734","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["four-position-key-selector","selector-switch","changeover-contact"],"artwork":"edu-ansi-four-position-key-selector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented 4 Position Selector Switches functional form","counterpart":"four-position-key-selector","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-four-position-key-selector","illustration":"https://eloragrid.ai/library/illustrations/ansi-four-position-key-selector.svg"},{"slug":"ansi-normally-open-limit-switch","name":"ANSI/IEEE normally-open limit switch symbol","kind":"symbol","abbreviation":"LS NO","aliases":["IEEE normally-open limit switch symbol","ANSI normally-open limit switch symbol","HLS11"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for normally-open limit switch, with public vendor evidence and drawing-reading notes.","description":["The NO limit-switch form links a discrete contact to mechanical position or travel. Its electrical state is only interpretable after the drawing identifies the actuated equipment position and the switch's reference condition.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Locate the mechanism position that closes the contact.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name monitored position","Identify switch terminals","Reference actuator detail"],"distinction":"A limit switch senses equipment movement; a manually operated pushbutton supplies an operator command.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Limit Switches"},{"label":"Public vendor block name","value":"HLS11 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-c0135d6b-f4a5-4954-85e0-5b188e5ff5c9","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["normally-open-limit-switch","plc-io","normally-open-contact"],"artwork":"edu-ansi-normally-open-limit-switch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Limit Switches functional form","counterpart":"normally-open-limit-switch","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-normally-open-limit-switch","illustration":"https://eloragrid.ai/library/illustrations/ansi-normally-open-limit-switch.svg"},{"slug":"ansi-normally-closed-limit-switch","name":"ANSI/IEEE normally-closed limit switch symbol","kind":"symbol","abbreviation":"LS NC","aliases":["IEEE normally-closed limit switch symbol","ANSI normally-closed limit switch symbol","HLS12"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for normally-closed limit switch, with public vendor evidence and drawing-reading notes.","description":["The NC limit-switch form describes a reference continuous circuit opened at the documented actuation position. Drawing interpretation needs the travel condition and return action, particularly where the switch participates in a permissive.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Check states during rest, travel and final position.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State normal position","Identify actuation condition","Reference contact terminals"],"distinction":"Normally closed does not itself establish a monitored safety or fault-detection function.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Limit Switches"},{"label":"Public vendor block name","value":"HLS12 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-c0135d6b-f4a5-4954-85e0-5b188e5ff5c9","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["normally-closed-limit-switch","plc-io","normally-open-contact"],"artwork":"edu-ansi-normally-closed-limit-switch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Limit Switches functional form","counterpart":"normally-closed-limit-switch","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-normally-closed-limit-switch","illustration":"https://eloragrid.ai/library/illustrations/ansi-normally-closed-limit-switch.svg"},{"slug":"ansi-roller-operated-limit-switch","name":"ANSI/IEEE roller-operated limit switch symbol","kind":"symbol","abbreviation":"LS ROLLER","aliases":["IEEE roller-operated limit switch symbol","ANSI roller-operated limit switch symbol","HLS11C"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for roller-operated limit switch, with public vendor evidence and drawing-reading notes.","description":["The roller limit-switch form identifies a mechanical roller actuator associated with the contact function. The electrical drawing records the signal path; the equipment detail determines the actual motion, roller location and allowable travel.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read the contact action against the roller's documented motion.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify roller/actuator detail","State contact behaviour","Reference travel/overtravel limits"],"distinction":"A roller actuator is a mechanical input, not an inductive proximity sensing element.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Limit Switches"},{"label":"Public vendor block name","value":"HLS11C (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-c0135d6b-f4a5-4954-85e0-5b188e5ff5c9","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["roller-operated-limit-switch","plc-io","normally-open-contact"],"artwork":"edu-ansi-roller-operated-limit-switch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Limit Switches functional form","counterpart":"roller-operated-limit-switch","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-roller-operated-limit-switch","illustration":"https://eloragrid.ai/library/illustrations/ansi-roller-operated-limit-switch.svg"},{"slug":"ansi-pressure-switch-no","name":"ANSI/IEEE pressure switch no symbol","kind":"symbol","abbreviation":"PS NO","aliases":["IEEE pressure switch no symbol","ANSI pressure switch no symbol","HPS11"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for pressure switch no, with public vendor evidence and drawing-reading notes.","description":["The pressure-operated NO form links a contact state to a documented pressure condition. The process direction and reset differential must be supplied separately because an open reference contact does not establish a high- or low-pressure threshold.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Identify whether rising or falling pressure produces operation.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name pressure service","State operate/reset conditions","Reference terminal pair"],"distinction":"Pressure process action and NO contact reference state are different pieces of information.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Pressure and Temperature Switches"},{"label":"Public vendor block name","value":"HPS11 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-fb8b55db-cba8-4a86-b8d1-aa59012f1a8e","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["pressure-switch-no","plc-io","normally-open-contact"],"artwork":"edu-ansi-pressure-switch-no","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Pressure and Temperature Switches functional form","counterpart":"pressure-switch-no","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-pressure-switch-no","illustration":"https://eloragrid.ai/library/illustrations/ansi-pressure-switch-no.svg"},{"slug":"ansi-pressure-switch-nc","name":"ANSI/IEEE pressure switch nc symbol","kind":"symbol","abbreviation":"PS NC","aliases":["IEEE pressure switch nc symbol","ANSI pressure switch nc symbol","HPS12"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for pressure switch nc, with public vendor evidence and drawing-reading notes.","description":["The pressure-operated NC form describes an initially continuous path changed by a documented pressure action. Its setting and process connection give meaning to the electrical circuit, while the contact rating remains a separate product property.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace both the pressure condition and controlled circuit destination.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State pressure direction","Record reset differential","Identify connected terminals"],"distinction":"An NC pressure switch produces a discrete state rather than a continuous pressure measurement signal.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Pressure and Temperature Switches"},{"label":"Public vendor block name","value":"HPS12 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-fb8b55db-cba8-4a86-b8d1-aa59012f1a8e","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["pressure-switch-nc","plc-io","normally-open-contact"],"artwork":"edu-ansi-pressure-switch-nc","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Pressure and Temperature Switches functional form","counterpart":"pressure-switch-nc","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-pressure-switch-nc","illustration":"https://eloragrid.ai/library/illustrations/ansi-pressure-switch-nc.svg"},{"slug":"ansi-temperature-switch-no","name":"ANSI/IEEE temperature switch no symbol","kind":"symbol","abbreviation":"TS NO","aliases":["IEEE temperature switch no symbol","ANSI temperature switch no symbol","HTS11"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for temperature switch no, with public vendor evidence and drawing-reading notes.","description":["The temperature-operated NO form relates a discrete contact to a specified thermal condition. Sensor placement and rising or falling temperature action need annotations beyond the actuation modifier.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Do not infer alarm direction from the NO contact alone.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name sensed location","State operate temperature/direction","Reference reset action"],"distinction":"A temperature switch is distinct from an RTD or thermocouple measurement input.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Pressure and Temperature Switches"},{"label":"Public vendor block name","value":"HTS11 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-fb8b55db-cba8-4a86-b8d1-aa59012f1a8e","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["temperature-switch-no","plc-io","normally-open-contact"],"artwork":"edu-ansi-temperature-switch-no","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Pressure and Temperature Switches functional form","counterpart":"temperature-switch-no","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-temperature-switch-no","illustration":"https://eloragrid.ai/library/illustrations/ansi-temperature-switch-no.svg"},{"slug":"ansi-temperature-switch-nc","name":"ANSI/IEEE temperature switch nc symbol","kind":"symbol","abbreviation":"TS NC","aliases":["IEEE temperature switch nc symbol","ANSI temperature switch nc symbol","HTS12"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for temperature switch nc, with public vendor evidence and drawing-reading notes.","description":["The temperature-operated NC form marks a normally continuous path changed by its documented thermal condition. Its usefulness in heater, fan or trip logic depends on the threshold and reset information linked to the drawing.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read manual versus automatic reset from the selected device.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify protected equipment","State threshold/reset type","Show contact connections"],"distinction":"Contact polarity does not uniquely determine whether a circuit represents overheating or undertemperature.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Pressure and Temperature Switches"},{"label":"Public vendor block name","value":"HTS12 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-fb8b55db-cba8-4a86-b8d1-aa59012f1a8e","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["temperature-switch-nc","plc-io","normally-open-contact"],"artwork":"edu-ansi-temperature-switch-nc","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Pressure and Temperature Switches functional form","counterpart":"temperature-switch-nc","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-temperature-switch-nc","illustration":"https://eloragrid.ai/library/illustrations/ansi-temperature-switch-nc.svg"},{"slug":"ansi-float-level-switch-no","name":"ANSI/IEEE float level switch no symbol","kind":"symbol","abbreviation":"LS FLOAT NO","aliases":["IEEE float level switch no symbol","ANSI float level switch no symbol","HFL11"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for float level switch no, with public vendor evidence and drawing-reading notes.","description":["The float-operated NO form connects a discrete electrical action to a defined liquid-level mechanism. The drawing must identify the vessel or location and the direction of level movement that actuates the contact.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Match the electrical reference state to the documented float orientation.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name vessel/location","State level direction","Reference operating/reset levels"],"distinction":"Float level sensing is different from a continuous analog level transmitter.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Miscellaneous Switches"},{"label":"Public vendor block name","value":"HFL11 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-278f6c21-b1a6-4ea1-a535-e78d53bbd10d","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["float-level-switch-no","plc-io","normally-open-contact"],"artwork":"edu-ansi-float-level-switch-no","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Miscellaneous Switches functional form","counterpart":"float-level-switch-no","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-float-level-switch-no","illustration":"https://eloragrid.ai/library/illustrations/ansi-float-level-switch-no.svg"},{"slug":"ansi-float-level-switch-nc","name":"ANSI/IEEE float level switch nc symbol","kind":"symbol","abbreviation":"LS FLOAT NC","aliases":["IEEE float level switch nc symbol","ANSI float level switch nc symbol","HFL12"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for float level switch nc, with public vendor evidence and drawing-reading notes.","description":["The float-operated NC form represents a normally continuous contact path influenced by liquid level. The level condition cannot be deduced from NC alone because the selected float arrangement establishes its operating direction.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Evaluate both rising and falling level conditions.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify float arrangement","State normal level condition","Reference contact destination"],"distinction":"A closed reference contact does not automatically identify a low-level alarm.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Miscellaneous Switches"},{"label":"Public vendor block name","value":"HFL12 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-278f6c21-b1a6-4ea1-a535-e78d53bbd10d","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["float-level-switch-nc","plc-io","normally-open-contact"],"artwork":"edu-ansi-float-level-switch-nc","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Miscellaneous Switches functional form","counterpart":"float-level-switch-nc","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-float-level-switch-nc","illustration":"https://eloragrid.ai/library/illustrations/ansi-float-level-switch-nc.svg"},{"slug":"ansi-liquid-flow-switch","name":"ANSI/IEEE liquid flow switch symbol","kind":"symbol","abbreviation":"FS LIQ","aliases":["IEEE liquid flow switch symbol","ANSI liquid flow switch symbol","HFS11"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for liquid flow switch, with public vendor evidence and drawing-reading notes.","description":["The flow-switch form associates an electrical contact with a documented flow condition. A cooling-system permissive or loss-of-flow alarm needs the process circuit and operate condition to be identified, rather than a bare contact label.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["State whether the contact indicates adequate flow or another specified condition.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name fluid circuit","Record operation/reset conditions","Reference signal destination"],"distinction":"A flow switch reports a discrete condition while a flow transmitter reports a measured quantity.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Miscellaneous Switches"},{"label":"Public vendor block name","value":"HFS11 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-278f6c21-b1a6-4ea1-a535-e78d53bbd10d","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["liquid-flow-switch","plc-io","normally-open-contact"],"artwork":"edu-ansi-liquid-flow-switch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Miscellaneous Switches functional form","counterpart":"liquid-flow-switch","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-liquid-flow-switch","illustration":"https://eloragrid.ai/library/illustrations/ansi-liquid-flow-switch.svg"},{"slug":"ansi-terminal","name":"ANSI/IEEE terminal connection symbol","kind":"symbol","abbreviation":"Terminal","aliases":["IEEE terminal connection symbol","ANSI terminal connection symbol","HT0_02"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for terminal connection, with public vendor evidence and drawing-reading notes.","description":["The round terminal form identifies a connection point in the vendor's IEEE-oriented library. Terminal identity and wire-number conventions tell the reader whether it is a physical terminal, a diagram connection reference or another declared interface.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Use the terminal plan to resolve physical position.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State terminal identifier","Show connected conductors","Reference terminal-strip plan"],"distinction":"A terminal mark is different from a wire-junction dot when the drawing assigns it a physical connection identity.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Terminals"},{"label":"Public vendor block name","value":"HT0_02 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-7c566b17-0c91-47f1-ad86-73893490622c","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["terminal","ct-test-terminal","terminal-strip","normally-open-contact"],"artwork":"edu-ansi-terminal","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Terminals functional form","counterpart":"terminal","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-terminal","illustration":"https://eloragrid.ai/library/illustrations/ansi-terminal.svg"},{"slug":"ansi-numbered-terminal","name":"ANSI/IEEE numbered terminal symbol","kind":"symbol","abbreviation":"TERM 1","aliases":["IEEE numbered terminal symbol","ANSI numbered terminal symbol","HT0002"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented numbered connection-point form, with public vendor evidence and terminal-reading notes.","description":["A numbered terminal form provides an identifiable wiring interface whose connection path is followed through the terminal plan. The number distinguishes the connection point; it does not describe every physical feature of the terminal body.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Match the terminal number to both conductor destinations.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify terminal strip/position","Show connection continuity","Reference conductor schedule"],"distinction":"A numbered schematic terminal is not a dimensional terminal-block footprint.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Terminals"},{"label":"Public vendor block name","value":"HT0002 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-7c566b17-0c91-47f1-ad86-73893490622c","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["terminal","terminal-strip","feed-through-terminal-block"],"artwork":"edu-ansi-numbered-terminal","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE round terminal with terminal number","counterpart":"terminal","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-numbered-terminal","illustration":"https://eloragrid.ai/library/illustrations/ansi-numbered-terminal.svg"},{"slug":"ansi-plug-and-socket-connector-pair","name":"ANSI/IEEE plug and socket connector pair symbol","kind":"symbol","abbreviation":"PLUG SOCKET","aliases":["IEEE plug and socket connector pair symbol","ANSI plug and socket connector pair symbol","HC01PJ"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for plug and socket connector pair, with public vendor evidence and drawing-reading notes.","description":["The plug/jack form identifies a detachable mating connection with two corresponding sides. The conductor path passes through a defined pin interface; plug name, socket name and mating references remain necessary for practical wiring.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Verify the pin-view convention on both halves.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name connector halves","Identify pin pair","Reference mating view"],"distinction":"A detachable connector interface differs from a permanent splice or a terminal bridge.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Connectors - No Wirenumber Changes"},{"label":"Public vendor block name","value":"HC01PJ (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-0b14feab-110a-4dd3-884e-0a2f8f9e76f7","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["plug-and-socket-connector-pair","terminal","plc-io"],"artwork":"edu-ansi-plug-and-socket-connector-pair","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Connectors - No Wirenumber Changes functional form","counterpart":"plug-and-socket-connector-pair","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-plug-and-socket-connector-pair","illustration":"https://eloragrid.ai/library/illustrations/ansi-plug-and-socket-connector-pair.svg"},{"slug":"ansi-connector-plug-half","name":"ANSI/IEEE connector plug half symbol","kind":"symbol","abbreviation":"PLUG","aliases":["IEEE connector plug half symbol","ANSI connector plug half symbol","HC01P_"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for connector plug half, with public vendor evidence and drawing-reading notes.","description":["The separately drawn plug form identifies one side of a detachable connection. The circuit can only be followed completely when its pin number and mating socket reference are preserved across the drawing set.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Find the mating half before treating this endpoint as disconnected.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name plug and pin","Cross-reference mating socket","State view convention"],"distinction":"An isolated plug-half representation is different from an off-sheet wire continuation arrow.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Connectors - No Wirenumber Changes"},{"label":"Public vendor block name","value":"HC01P_ (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-0b14feab-110a-4dd3-884e-0a2f8f9e76f7","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["connector-plug-half","terminal","plc-io"],"artwork":"edu-ansi-connector-plug-half","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Connectors - No Wirenumber Changes functional form","counterpart":"connector-plug-half","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-connector-plug-half","illustration":"https://eloragrid.ai/library/illustrations/ansi-connector-plug-half.svg"},{"slug":"ansi-connector-socket-half","name":"ANSI/IEEE connector socket half symbol","kind":"symbol","abbreviation":"SOCKET","aliases":["IEEE connector socket half symbol","ANSI connector socket half symbol","HC01_J"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for connector socket half, with public vendor evidence and drawing-reading notes.","description":["The jack-side connector form identifies the mating interface for a separately referenced plug. Terminal naming and pin-view information prevent accidental reversal when translating between a front view and a wiring view.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read the socket's pin orientation from its documented view.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name socket and pin","Reference mating plug","Identify wiring/front view"],"distinction":"A socket-half schematic form does not describe mechanical shell dimensions or keying.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Connectors - No Wirenumber Changes"},{"label":"Public vendor block name","value":"HC01_J (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-0b14feab-110a-4dd3-884e-0a2f8f9e76f7","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["connector-socket-half","terminal","plc-io"],"artwork":"edu-ansi-connector-socket-half","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Connectors - No Wirenumber Changes functional form","counterpart":"connector-socket-half","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-connector-socket-half","illustration":"https://eloragrid.ai/library/illustrations/ansi-connector-socket-half.svg"},{"slug":"ansi-wire-splice","name":"ANSI/IEEE wire splice symbol","kind":"symbol","abbreviation":"SPLICE","aliases":["IEEE wire splice symbol","ANSI wire splice symbol","HSP1001"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for wire splice, with public vendor evidence and drawing-reading notes.","description":["The splice form identifies intentional continuity among documented conductors without a detachable mating connection. A splice identifier and wiring detail establish its construction and joined conductors; nearby lines alone do not establish a splice.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Distinguish a joined node from an unconnected conductor crossing.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify splice tag","List joined wires","Reference construction detail"],"distinction":"A splice creates permanent continuity while a connector provides a separable mating interface.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Splice Symbols"},{"label":"Public vendor block name","value":"HSP1001 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-cf40d77d-bc49-4cde-9396-c439966bcab2","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["wire-splice","terminal","plc-io"],"artwork":"edu-ansi-wire-splice","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Splice Symbols functional form","counterpart":"wire-splice","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-wire-splice","illustration":"https://eloragrid.ai/library/illustrations/ansi-wire-splice.svg"},{"slug":"ansi-protective-earth","name":"ANSI/IEEE protective earth symbol","kind":"symbol","abbreviation":"PE","aliases":["IEEE protective earth symbol","ANSI protective earth symbol","HGND4"],"category":"connections-wiring","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for protective earth, with public vendor evidence and drawing-reading notes.","description":["The protective-earth form identifies a connection serving the documented protective conductor arrangement. Its role must be read with the device terminal designation and the installation's bonding paths, rather than treating all ground-like marks as one signal common.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace the connection to the assembly's protective-earth network.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify PE terminal/conductor","Show bonding path","Reference installation earthing detail"],"distinction":"Protective earth differs in purpose from functional earth and from an arbitrary signal reference.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Miscellaneous"},{"label":"Public vendor block name","value":"HGND4 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-34282bfd-7b8e-48f3-a6ed-93adbdddfbd3","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["protective-earth","earthing-switch","terminal","control-cabinet"],"artwork":"edu-ansi-protective-earth","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Miscellaneous functional form","counterpart":"protective-earth","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-protective-earth","illustration":"https://eloragrid.ai/library/illustrations/ansi-protective-earth.svg"},{"slug":"ansi-functional-earth","name":"ANSI/IEEE functional earth symbol","kind":"symbol","abbreviation":"FE","aliases":["IEEE functional earth symbol","ANSI functional earth symbol","HGND3"],"category":"connections-wiring","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for functional earth, with public vendor evidence and drawing-reading notes.","description":["The functional-earth form identifies an operational earth connection in the vendor's IEEE-oriented library. Its purpose may concern documented EMC or signal performance and its relationship to protective earth must be explicitly defined.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Check the permitted connection between functional and protective earth.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State functional purpose","Identify earth conductor","Reference equipment instructions"],"distinction":"Functional earth is not automatically a substitute for the protective-earthing path.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Miscellaneous"},{"label":"Public vendor block name","value":"HGND3 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-34282bfd-7b8e-48f3-a6ed-93adbdddfbd3","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["functional-earth","protective-earth","earthing-switch"],"artwork":"edu-ansi-functional-earth","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Miscellaneous functional form","counterpart":"functional-earth","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-functional-earth","illustration":"https://eloragrid.ai/library/illustrations/ansi-functional-earth.svg"},{"slug":"ansi-resistor","name":"ANSI/IEEE resistor symbol","kind":"symbol","abbreviation":"R","aliases":["IEEE resistor symbol","ANSI resistor symbol","HRE1B"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for resistor, with public vendor evidence and drawing-reading notes.","description":["The fixed-resistor form identifies resistance in the circuit path. This original zigzag illustration explains the resistive function without assigning a standard graphic number; the component value, power rating and reference designator remain essential to reading the actual schematic.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read resistance and rating from the annotation rather than from the number of drawn zigzag segments.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State resistance/tolerance","Record power rating","Identify circuit function"],"distinction":"A fixed resistance and a variable resistance are different component functions, even if their basic graphical family is related.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Resistive Components"},{"label":"Public vendor block name","value":"HRE1B (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-1a45de3a-cd2a-4ad9-8125-219905c870b1","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["resistor","capacitor","relay-coil","terminal"],"artwork":"edu-ansi-resistor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Resistive Components functional form","counterpart":"resistor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-resistor","illustration":"https://eloragrid.ai/library/illustrations/ansi-resistor.svg"},{"slug":"ansi-variable-resistor","name":"ANSI/IEEE variable resistor symbol","kind":"symbol","abbreviation":"R VAR","aliases":["IEEE variable resistor symbol","ANSI variable resistor symbol","HVR1B"],"category":"electronics-components","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for variable resistor, with public vendor evidence and drawing-reading notes.","description":["The variable-resistor form combines a resistive path with an adjustment indication. The adjustable range and connected terminals determine whether the circuit uses it as a resistance or part of a divider; the arrow is not automatically a separate supply lead.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Distinguish a parameter adjustment from an electrical terminal.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State resistance range","Show used terminals","Reference adjustment purpose"],"distinction":"A variable resistor's adjustment and a directional signal arrow carry different meanings.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Resistive Components"},{"label":"Public vendor block name","value":"HVR1B (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-1a45de3a-cd2a-4ad9-8125-219905c870b1","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["variable-resistor","resistor","capacitor"],"artwork":"edu-ansi-variable-resistor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Resistive Components functional form","counterpart":"variable-resistor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-variable-resistor","illustration":"https://eloragrid.ai/library/illustrations/ansi-variable-resistor.svg"},{"slug":"ansi-potentiometer","name":"ANSI/IEEE potentiometer symbol","kind":"symbol","abbreviation":"POT","aliases":["IEEE potentiometer symbol","ANSI potentiometer symbol","HVR1R4"],"category":"electronics-components","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for potentiometer, with public vendor evidence and drawing-reading notes.","description":["The mobile-contact resistor form identifies a wiper associated with a resistive element. Its two end terminals and movable contact define the circuit connection, making the wiper path important when reading setpoint or feedback wiring.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace the wiper independently from the fixed ends.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Label wiper and end terminals","State resistance range","Reference operating/setpoint connection"],"distinction":"A three-terminal divider connection and a two-terminal variable-resistance connection use the component differently.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Resistive Components"},{"label":"Public vendor block name","value":"HVR1R4 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-1a45de3a-cd2a-4ad9-8125-219905c870b1","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["potentiometer","resistor","capacitor"],"artwork":"edu-ansi-potentiometer","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Resistive Components functional form","counterpart":"potentiometer","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-potentiometer","illustration":"https://eloragrid.ai/library/illustrations/ansi-potentiometer.svg"},{"slug":"ansi-light-dependent-resistor","name":"ANSI/IEEE light-dependent resistor symbol","kind":"symbol","abbreviation":"LDR","aliases":["IEEE light-dependent resistor symbol","ANSI light-dependent resistor symbol","HRE1LDR"],"category":"electronics-components","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for light-dependent resistor, with public vendor evidence and drawing-reading notes.","description":["The light-dependent resistor form identifies a resistive component affected by illumination. Its sensing modifier describes the physical influence rather than a new electrical terminal, while the surrounding circuit translates the resistance change into a usable signal.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace the electrical leads independently of the optical indication.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify resistive terminals","Reference illumination conditions","Show associated sensing circuit"],"distinction":"An LDR changes resistance; a photodiode has a semiconductor junction and different measurement behaviour.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Resistive Components"},{"label":"Public vendor block name","value":"HRE1LDR (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-1a45de3a-cd2a-4ad9-8125-219905c870b1","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["light-dependent-resistor","resistor","capacitor"],"artwork":"edu-ansi-light-dependent-resistor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Resistive Components functional form","counterpart":"light-dependent-resistor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-light-dependent-resistor","illustration":"https://eloragrid.ai/library/illustrations/ansi-light-dependent-resistor.svg"},{"slug":"ansi-heating-element","name":"ANSI/IEEE heating element symbol","kind":"symbol","abbreviation":"HEATER","aliases":["IEEE heating element symbol","ANSI heating element symbol","HRE1HT"],"category":"control-circuits","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for heating element, with public vendor evidence and drawing-reading notes.","description":["The heater-element form identifies a documented resistive heating load. Supply conductors, control thermostat and protective device should be read as separate elements, even when the drawing places them close together to explain the heater circuit.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read heater load and thermostat action independently.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State voltage/power","Reference thermostat/control","Show protective device"],"distinction":"A heating element is a power-consuming load, whereas the thermostat is a control or measuring element.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Resistive Components"},{"label":"Public vendor block name","value":"HRE1HT (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-1a45de3a-cd2a-4ad9-8125-219905c870b1","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["heating-element","resistor","capacitor"],"artwork":"edu-ansi-heating-element","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Resistive Components functional form","counterpart":"heating-element","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-heating-element","illustration":"https://eloragrid.ai/library/illustrations/ansi-heating-element.svg"},{"slug":"ansi-varistor","name":"ANSI/IEEE varistor symbol","kind":"symbol","abbreviation":"VDR","aliases":["IEEE varistor symbol","ANSI varistor symbol","HVR1R3"],"category":"electronics-components","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for varistor, with public vendor evidence and drawing-reading notes.","description":["The varistor form adds a voltage-dependent characteristic to a resistive component. The connection point and selected voltage and surge data establish the protective use; its drawing modifier does not replace the equipment rating.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Check continuous-voltage duty separately from surge-limiting data.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name protected nodes","State voltage rating","Reference surge capability"],"distinction":"A nonlinear varistor and a fixed current-limiting resistor do not provide the same response.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Resistive Components"},{"label":"Public vendor block name","value":"HVR1R3 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-1a45de3a-cd2a-4ad9-8125-219905c870b1","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["varistor","resistor","capacitor"],"artwork":"edu-ansi-varistor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Resistive Components functional form","counterpart":"varistor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-varistor","illustration":"https://eloragrid.ai/library/illustrations/ansi-varistor.svg"},{"slug":"ansi-current-measuring-shunt","name":"ANSI/IEEE current-measuring shunt symbol","kind":"symbol","abbreviation":"SHUNT","aliases":["IEEE current-measuring shunt symbol","ANSI current-measuring shunt symbol","HVR1R7"],"category":"electronics-components","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for current-measuring shunt, with public vendor evidence and drawing-reading notes.","description":["The shunt form identifies a resistive current path used to derive a voltage measurement. Power-current terminals and voltage-sense leads must be distinguished where the actual device provides separate sensing connections.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Follow the sense circuit without confusing it with the full-current path.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State current/voltage-drop rating","Show sense terminals","Reference polarity/scaling"],"distinction":"A shunt produces a measured voltage drop; a CT provides an instrument-transformer secondary current.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Resistive Components"},{"label":"Public vendor block name","value":"HVR1R7 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-1a45de3a-cd2a-4ad9-8125-219905c870b1","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["current-measuring-shunt","resistor","capacitor"],"artwork":"edu-ansi-current-measuring-shunt","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Resistive Components functional form","counterpart":"current-measuring-shunt","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-current-measuring-shunt","illustration":"https://eloragrid.ai/library/illustrations/ansi-current-measuring-shunt.svg"},{"slug":"ansi-capacitor","name":"ANSI/IEEE capacitor symbol","kind":"symbol","abbreviation":"C","aliases":["IEEE capacitor symbol","ANSI capacitor symbol","HCA1"],"category":"electronics-components","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for capacitor, with public vendor evidence and drawing-reading notes.","description":["The capacitor form identifies a capacitive component between its circuit connections. Its value and voltage rating are read from the component annotation, and the circuit placement establishes whether its role is filtering, coupling or another documented function.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["The two plates represent a function, not a physical spacing dimension.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State capacitance/tolerance","Record voltage rating","Identify circuit purpose"],"distinction":"A generic capacitor form does not establish polarisation or an electrolytic construction.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Capacitive Components"},{"label":"Public vendor block name","value":"HCA1 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-0f8673c7-d786-441c-ab55-f2cdb8d5b288","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["capacitor","busbar","circuit-breaker","resistor"],"artwork":"edu-ansi-capacitor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Capacitive Components functional form","counterpart":"capacitor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-capacitor","illustration":"https://eloragrid.ai/library/illustrations/ansi-capacitor.svg"},{"slug":"ansi-electrolytic-capacitor","name":"ANSI/IEEE electrolytic capacitor symbol","kind":"symbol","abbreviation":"C ELEC","aliases":["IEEE electrolytic capacitor symbol","ANSI electrolytic capacitor symbol","HCA1EL"],"category":"electronics-components","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for electrolytic capacitor, with public vendor evidence and drawing-reading notes.","description":["The electrolytic capacitor form adds a documented construction or polarity qualifier to the capacitive function. The actual component determines whether polarity marking is required; this original preview illustrates a polarised use rather than declaring every electrolytic type identical.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Check component polarity and allowed voltage before following the DC connection.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State capacitance/voltage","Preserve documented polarity","Reference component type"],"distinction":"Electrolytic construction is different from simply rotating a generic capacitor graphic.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Capacitive Components"},{"label":"Public vendor block name","value":"HCA1EL (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-0f8673c7-d786-441c-ab55-f2cdb8d5b288","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["electrolytic-capacitor","resistor","capacitor"],"artwork":"edu-ansi-electrolytic-capacitor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Capacitive Components functional form","counterpart":"electrolytic-capacitor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-electrolytic-capacitor","illustration":"https://eloragrid.ai/library/illustrations/ansi-electrolytic-capacitor.svg"},{"slug":"ansi-feedthrough-capacitor","name":"ANSI/IEEE feedthrough capacitor symbol","kind":"symbol","abbreviation":"C FEED","aliases":["IEEE feedthrough capacitor symbol","ANSI feedthrough capacitor symbol","HCA1C2"],"category":"electronics-components","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for feedthrough capacitor, with public vendor evidence and drawing-reading notes.","description":["The feedthrough capacitor form combines a through conductor with a documented capacitive filtering connection. Its circuit reader must distinguish the through-current path from the return or case connection serving the filtering function.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Follow the through conductor and shunt return as different paths.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify filtered conductor","Show return/case connection","Reference component ratings"],"distinction":"A feedthrough capacitor is a filtering element, not a detachable feed-through terminal.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Capacitive Components"},{"label":"Public vendor block name","value":"HCA1C2 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-0f8673c7-d786-441c-ab55-f2cdb8d5b288","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["feedthrough-capacitor","resistor","capacitor"],"artwork":"edu-ansi-feedthrough-capacitor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Capacitive Components functional form","counterpart":"feedthrough-capacitor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-feedthrough-capacitor","illustration":"https://eloragrid.ai/library/illustrations/ansi-feedthrough-capacitor.svg"},{"slug":"ansi-adjustable-capacitor","name":"ANSI/IEEE adjustable capacitor symbol","kind":"symbol","abbreviation":"C ADJ","aliases":["IEEE adjustable capacitor symbol","ANSI adjustable capacitor symbol","HCA1_S00575"],"category":"electronics-components","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for adjustable capacitor, with public vendor evidence and drawing-reading notes.","description":["The preset-adjustment capacitor form identifies an adjustable capacitive parameter. Its permitted range and commissioning or operational adjustment method come from the component data rather than from an assumed interpretation of the adjustment mark.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Determine whether adjustment is a preset or a normal operational control.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State capacitance range","Reference adjustment method","Identify circuit terminals"],"distinction":"Capacitive adjustment changes a circuit parameter; it is not a switched connection between two independent circuits.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Capacitive Components"},{"label":"Public vendor block name","value":"HCA1_S00575 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-0f8673c7-d786-441c-ab55-f2cdb8d5b288","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["adjustable-capacitor","resistor","capacitor"],"artwork":"edu-ansi-adjustable-capacitor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Capacitive Components functional form","counterpart":"adjustable-capacitor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-adjustable-capacitor","illustration":"https://eloragrid.ai/library/illustrations/ansi-adjustable-capacitor.svg"},{"slug":"ansi-diode","name":"ANSI/IEEE diode symbol","kind":"symbol","abbreviation":"D","aliases":["IEEE diode symbol","ANSI diode symbol","HDI1"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for diode, with public vendor evidence and drawing-reading notes.","description":["The diode form identifies a semiconductor junction with documented directional conduction characteristics. Anode and cathode assignment determine how to follow the power or signal path, and the selected component data establishes forward and reverse operating limits.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Use terminal polarity instead of left-to-right page placement.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify anode/cathode","Record voltage/current ratings","State circuit role"],"distinction":"A diode is not a mechanical contact; reverse behaviour depends on the selected semiconductor type.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Semiconductor Components"},{"label":"Public vendor block name","value":"HDI1 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-ec01cfc2-47b9-4ae3-ae5e-0fb86d327a82","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["diode","resistor","power-converter"],"artwork":"edu-ansi-diode","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Semiconductor Components functional form","counterpart":"diode","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-diode","illustration":"https://eloragrid.ai/library/illustrations/ansi-diode.svg"},{"slug":"ansi-photodiode","name":"ANSI/IEEE photodiode symbol","kind":"symbol","abbreviation":"PD","aliases":["IEEE photodiode symbol","ANSI photodiode symbol","HDI1B4"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for photodiode, with public vendor evidence and drawing-reading notes.","description":["The photosensitive diode form associates an optical influence with a semiconductor sensing path. The optical marker is separate from electrical bias and measurement connections, which must be read from the actual sensing circuit.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Identify the measurement circuit and any bias supply.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Preserve diode polarity","Reference optical input","Show sensing/bias circuit"],"distinction":"A photodiode receives light-related input, whereas an LED is a light-emitting component.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Semiconductor Components"},{"label":"Public vendor block name","value":"HDI1B4 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-ec01cfc2-47b9-4ae3-ae5e-0fb86d327a82","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["photodiode","resistor","power-converter"],"artwork":"edu-ansi-photodiode","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Semiconductor Components functional form","counterpart":"photodiode","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-photodiode","illustration":"https://eloragrid.ai/library/illustrations/ansi-photodiode.svg"},{"slug":"ansi-zener-diode","name":"ANSI/IEEE zener diode symbol","kind":"symbol","abbreviation":"ZD","aliases":["IEEE zener diode symbol","ANSI zener diode symbol","HDI1V2"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for zener diode, with public vendor evidence and drawing-reading notes.","description":["The Zener diode form identifies a documented reverse-breakdown operating function. Its polarity, reference voltage and associated current limitation establish how the circuit uses the component; the modified junction outline is not a complete regulator circuit.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read the current-limiting path alongside the Zener connection.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State nominal voltage/power","Preserve polarity","Reference bias/current limitation"],"distinction":"A Zener operating function differs from an ordinary rectifier diode's intended reverse-voltage service.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Semiconductor Components"},{"label":"Public vendor block name","value":"HDI1V2 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-ec01cfc2-47b9-4ae3-ae5e-0fb86d327a82","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["zener-diode","resistor","power-converter"],"artwork":"edu-ansi-zener-diode","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Semiconductor Components functional form","counterpart":"zener-diode","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-zener-diode","illustration":"https://eloragrid.ai/library/illustrations/ansi-zener-diode.svg"},{"slug":"ansi-single-phase-bridge-rectifier","name":"ANSI/IEEE single-phase bridge rectifier symbol","kind":"symbol","abbreviation":"BR 1PH","aliases":["IEEE single-phase bridge rectifier symbol","ANSI single-phase bridge rectifier symbol","HDI1BR"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for single-phase bridge rectifier, with public vendor evidence and drawing-reading notes.","description":["The bridge-rectifier form identifies a multi-junction AC-to-DC arrangement with separate AC inputs and polarised DC output. This original four-branch diagram illustrates the connection principle; rectifier rating and any smoothing or regulation remain separate specifications.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace both AC inputs and both DC outputs.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify AC terminal pair","Mark DC polarity","Reference bridge ratings"],"distinction":"A rectifier bridge supplies rectified output; it is not automatically a regulated DC power supply.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Semiconductor Components"},{"label":"Public vendor block name","value":"HDI1BR (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-ec01cfc2-47b9-4ae3-ae5e-0fb86d327a82","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["single-phase-bridge-rectifier","diode","ac-to-dc-power-supply","power-converter"],"artwork":"edu-ansi-single-phase-bridge-rectifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Semiconductor Components functional form","counterpart":"single-phase-bridge-rectifier","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-single-phase-bridge-rectifier","illustration":"https://eloragrid.ai/library/illustrations/ansi-single-phase-bridge-rectifier.svg"},{"slug":"ansi-silicon-controlled-rectifier","name":"ANSI/IEEE silicon-controlled rectifier symbol","kind":"symbol","abbreviation":"SCR","aliases":["IEEE silicon-controlled rectifier symbol","ANSI silicon-controlled rectifier symbol","HDI1V4"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for silicon-controlled rectifier, with public vendor evidence and drawing-reading notes.","description":["The SCR form identifies a thyristor power path with a separate gate trigger connection. Following anode, cathode and gate independently explains the difference between the controlled power circuit and its drive circuit.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Locate the gate reference before interpreting the trigger supply.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Label anode/cathode/gate","Reference gate drive","State power-circuit rating"],"distinction":"An SCR is different from a bidirectional TRIAC, and a gate lead is not an additional load terminal.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Semiconductor Components"},{"label":"Public vendor block name","value":"HDI1V4 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-ec01cfc2-47b9-4ae3-ae5e-0fb86d327a82","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["silicon-controlled-rectifier","resistor","power-converter"],"artwork":"edu-ansi-silicon-controlled-rectifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Semiconductor Components functional form","counterpart":"silicon-controlled-rectifier","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-silicon-controlled-rectifier","illustration":"https://eloragrid.ai/library/illustrations/ansi-silicon-controlled-rectifier.svg"},{"slug":"ansi-triac","name":"ANSI/IEEE triac symbol","kind":"symbol","abbreviation":"TRIAC","aliases":["IEEE triac symbol","ANSI triac symbol","HDI1_S00659"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for triac, with public vendor evidence and drawing-reading notes.","description":["The TRIAC form identifies a controlled bidirectional semiconductor path. Its main-terminal and gate references establish how the drive circuit is related to the AC load circuit, with operating details supplied by the selected component.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Use the component's main-terminal numbering to resolve the gate reference.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Label main terminals/gate","Reference trigger circuit","State load and voltage duty"],"distinction":"A TRIAC has a gate-controlled function unlike a DIAC triggering element.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Semiconductor Components"},{"label":"Public vendor block name","value":"HDI1_S00659 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-ec01cfc2-47b9-4ae3-ae5e-0fb86d327a82","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["triac","resistor","power-converter"],"artwork":"edu-ansi-triac","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Semiconductor Components functional form","counterpart":"triac","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-triac","illustration":"https://eloragrid.ai/library/illustrations/ansi-triac.svg"},{"slug":"ansi-voltmeter","name":"ANSI/IEEE voltmeter symbol","kind":"symbol","abbreviation":"V","aliases":["IEEE voltmeter symbol","ANSI voltmeter symbol","HVM1"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for voltmeter, with public vendor evidence and drawing-reading notes.","description":["The voltage-meter form identifies an indicating instrument connected to a documented voltage measurement. Its measurement pair, selected source and any VT ratio must be read separately from the instrument's auxiliary supply.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace both voltage inputs to establish the measured quantity.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name measured voltage","State direct/VT connection","Reference measuring range"],"distinction":"A voltage meter displays a quantity; a voltage relay applies an operating criterion and issues an output.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Instrumentation and Sensors"},{"label":"Public vendor block name","value":"HVM1 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f44d5059-4728-40bd-b9ba-0de7cfdfaacf","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["voltmeter","current-transformer","voltage-transformer"],"artwork":"edu-ansi-voltmeter","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Instrumentation and Sensors functional form","counterpart":"voltmeter","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-voltmeter","illustration":"https://eloragrid.ai/library/illustrations/ansi-voltmeter.svg"},{"slug":"ansi-ammeter","name":"ANSI/IEEE ammeter symbol","kind":"symbol","abbreviation":"A","aliases":["IEEE ammeter symbol","ANSI ammeter symbol","HAM1"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for ammeter, with public vendor evidence and drawing-reading notes.","description":["The ammeter form identifies current indication from a direct or instrument-transformer measurement. Current input and auxiliary power connections serve different functions, so a compact instrument circle is read with its terminal diagram.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace the current circuit and CT reference together.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify current input","State direct/CT scaling","Reference secondary test connections"],"distinction":"An ammeter is a measuring instrument rather than an overcurrent protective function number.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Instrumentation and Sensors"},{"label":"Public vendor block name","value":"HAM1 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f44d5059-4728-40bd-b9ba-0de7cfdfaacf","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["ammeter","current-transformer","voltage-transformer"],"artwork":"edu-ansi-ammeter","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Instrumentation and Sensors functional form","counterpart":"ammeter","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-ammeter","illustration":"https://eloragrid.ai/library/illustrations/ansi-ammeter.svg"},{"slug":"ansi-power-factor-meter","name":"ANSI/IEEE power-factor meter symbol","kind":"symbol","abbreviation":"PF","aliases":["IEEE power-factor meter symbol","ANSI power-factor meter symbol","HIN1PFM"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for power-factor meter, with public vendor evidence and drawing-reading notes.","description":["The power-factor meter form indicates a relationship derived from documented voltage and current inputs. Phase association and sign convention affect interpretation, while total versus displacement power factor depends on the instrument's method.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Check the reported power-factor convention before comparing indications.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Show voltage/current phases","State measurement convention","Reference CT/VT scaling"],"distinction":"Power factor is a ratio, not reactive power measured in var.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Instrumentation and Sensors"},{"label":"Public vendor block name","value":"HIN1PFM (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f44d5059-4728-40bd-b9ba-0de7cfdfaacf","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["power-factor-meter","current-transformer","voltage-transformer"],"artwork":"edu-ansi-power-factor-meter","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Instrumentation and Sensors functional form","counterpart":"power-factor-meter","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-power-factor-meter","illustration":"https://eloragrid.ai/library/illustrations/ansi-power-factor-meter.svg"},{"slug":"ansi-frequency-meter","name":"ANSI/IEEE frequency meter symbol","kind":"symbol","abbreviation":"Hz","aliases":["IEEE frequency meter symbol","ANSI frequency meter symbol","HIN1FRM"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for frequency meter, with public vendor evidence and drawing-reading notes.","description":["The frequency-meter form identifies the frequency of a specified measurement source. When several buses or generators appear on the drawing, the input path and selection switch determine which source is being indicated.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read the source selection before interpreting the value.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name measured source","Reference input range","Show source-selection wiring"],"distinction":"Frequency indication differs from an underfrequency relay's trip or load-shed criterion.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Instrumentation and Sensors"},{"label":"Public vendor block name","value":"HIN1FRM (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f44d5059-4728-40bd-b9ba-0de7cfdfaacf","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["frequency-meter","current-transformer","voltage-transformer"],"artwork":"edu-ansi-frequency-meter","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Instrumentation and Sensors functional form","counterpart":"frequency-meter","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-frequency-meter","illustration":"https://eloragrid.ai/library/illustrations/ansi-frequency-meter.svg"},{"slug":"ansi-recording-wattmeter","name":"ANSI/IEEE recording wattmeter symbol","kind":"symbol","abbreviation":"W REC","aliases":["IEEE recording wattmeter symbol","ANSI recording wattmeter symbol","HIN1P17"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for recording wattmeter, with public vendor evidence and drawing-reading notes.","description":["The recording-wattmeter form identifies active-power measurement with a documented recording function. The schematic supplies the measurement inputs; recording interval, retained history and sign convention are configured instrument information.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Check phase inputs and import/export direction together.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Show measurement phases","State transformer ratios","Reference logging configuration"],"distinction":"Recorded power and accumulated energy are different measurement records.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Instrumentation and Sensors"},{"label":"Public vendor block name","value":"HIN1P17 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f44d5059-4728-40bd-b9ba-0de7cfdfaacf","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["recording-wattmeter","current-transformer","voltage-transformer"],"artwork":"edu-ansi-recording-wattmeter","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Instrumentation and Sensors functional form","counterpart":"recording-wattmeter","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-recording-wattmeter","illustration":"https://eloragrid.ai/library/illustrations/ansi-recording-wattmeter.svg"},{"slug":"ansi-reactive-power-meter","name":"ANSI/IEEE reactive-power meter symbol","kind":"symbol","abbreviation":"var","aliases":["IEEE reactive-power meter symbol","ANSI reactive-power meter symbol","HIN1P21"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for reactive-power meter, with public vendor evidence and drawing-reading notes.","description":["The varmeter form identifies reactive-power indication from documented measurement inputs. The sign or quadrant convention is important for generator and capacitor-control applications and must be supplied by the instrument configuration.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Do not infer leading/lagging convention from page orientation.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Show voltage/current inputs","State sign convention","Reference scaling"],"distinction":"Reactive power in var is different from reactive energy in varh.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Instrumentation and Sensors"},{"label":"Public vendor block name","value":"HIN1P21 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f44d5059-4728-40bd-b9ba-0de7cfdfaacf","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["reactive-power-meter","current-transformer","voltage-transformer"],"artwork":"edu-ansi-reactive-power-meter","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Instrumentation and Sensors functional form","counterpart":"reactive-power-meter","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-reactive-power-meter","illustration":"https://eloragrid.ai/library/illustrations/ansi-reactive-power-meter.svg"},{"slug":"ansi-synchronoscope","name":"ANSI/IEEE synchronoscope symbol","kind":"symbol","abbreviation":"SYNC SCOPE","aliases":["IEEE synchronoscope symbol","ANSI synchronoscope symbol","HIN1P11"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for synchronoscope, with public vendor evidence and drawing-reading notes.","description":["The synchronoscope form identifies an instrument comparing two AC sources. The incoming and reference inputs determine the meaning of its phase and relative-frequency indication; a separate permissive function is shown where the design includes one.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Follow both source inputs and their phase selections.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Name incoming/reference sources","Show input selection","Reference indication convention"],"distinction":"A synchronoscope supplies indication, whereas a synchronism-check relay supplies a configured permissive output.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Instrumentation and Sensors"},{"label":"Public vendor block name","value":"HIN1P11 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f44d5059-4728-40bd-b9ba-0de7cfdfaacf","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["synchronoscope","current-transformer","voltage-transformer"],"artwork":"edu-ansi-synchronoscope","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Instrumentation and Sensors functional form","counterpart":"synchronoscope","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-synchronoscope","illustration":"https://eloragrid.ai/library/illustrations/ansi-synchronoscope.svg"},{"slug":"ansi-running-hours-meter","name":"ANSI/IEEE running-hours meter symbol","kind":"symbol","abbreviation":"HOURS","aliases":["IEEE running-hours meter symbol","ANSI running-hours meter symbol","HIN1HRM"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for running-hours meter, with public vendor evidence and drawing-reading notes.","description":["The hour-meter form identifies elapsed-time accumulation while its specified enabling condition is active. The circuit should make clear whether this condition is supply energisation, equipment running feedback or another declared event.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read the enable circuit instead of assuming it counts actual shaft running.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify enable contact","State counted condition","Reference retention/reset"],"distinction":"An hour meter accumulates duration; an operation counter counts discrete events.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Instrumentation and Sensors"},{"label":"Public vendor block name","value":"HIN1HRM (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-f44d5059-4728-40bd-b9ba-0de7cfdfaacf","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["running-hours-meter","current-transformer","voltage-transformer"],"artwork":"edu-ansi-running-hours-meter","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Instrumentation and Sensors functional form","counterpart":"running-hours-meter","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-running-hours-meter","illustration":"https://eloragrid.ai/library/illustrations/ansi-running-hours-meter.svg"},{"slug":"ansi-single-phase-ac-motor","name":"ANSI/IEEE single-phase ac motor symbol","kind":"symbol","abbreviation":"M 1PH AC","aliases":["IEEE single-phase ac motor symbol","ANSI single-phase ac motor symbol","HMO1M9"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for single-phase ac motor, with public vendor evidence and drawing-reading notes.","description":["The single-phase AC motor form identifies a documented electrical load with a specified single-phase supply. Winding terminals, start/run components and mechanical driven duty require the actual motor data beyond the simplified machine circle.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Locate the selected motor connection diagram before wiring auxiliary components.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State voltage/power","Reference winding terminals","Show starting and protection circuits"],"distinction":"A single-phase motor form does not select a universal capacitor or starting arrangement.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — 1 Phase Motors"},{"label":"Public vendor block name","value":"HMO1M9 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-b12ef00e-cbdf-4043-9264-8f7d07e107d6","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["single-phase-ac-motor","motor","contactor"],"artwork":"edu-ansi-single-phase-ac-motor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented 1 Phase Motors functional form","counterpart":"single-phase-ac-motor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-single-phase-ac-motor","illustration":"https://eloragrid.ai/library/illustrations/ansi-single-phase-ac-motor.svg"},{"slug":"ansi-three-phase-ac-motor","name":"ANSI/IEEE three-phase ac motor symbol","kind":"symbol","abbreviation":"M 3PH","aliases":["IEEE three-phase ac motor symbol","ANSI three-phase ac motor symbol","HMO13"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for three-phase ac motor, with public vendor evidence and drawing-reading notes.","description":["The three-phase motor form identifies a load connected to a documented three-phase circuit. Star/delta links, starter and overload information are separate details that should be linked rather than inferred from the machine representation.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Distinguish simplified load indication from an expanded winding connection.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State motor rating","Reference winding links","Show starter/overload arrangement"],"distinction":"Three-phase representation does not by itself establish a star or delta connection.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — 3 Phase Motors"},{"label":"Public vendor block name","value":"HMO13 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-392101fd-a88c-4bac-96cd-1c676094c262","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["three-phase-ac-motor","motor","contactor"],"artwork":"edu-ansi-three-phase-ac-motor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented 3 Phase Motors functional form","counterpart":"three-phase-ac-motor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-three-phase-ac-motor","illustration":"https://eloragrid.ai/library/illustrations/ansi-three-phase-ac-motor.svg"},{"slug":"ansi-wound-rotor-induction-motor","name":"ANSI/IEEE wound-rotor induction motor symbol","kind":"symbol","abbreviation":"M WR","aliases":["IEEE wound-rotor induction motor symbol","ANSI wound-rotor induction motor symbol","HMO1M4"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for wound-rotor induction motor, with public vendor evidence and drawing-reading notes.","description":["The wound-rotor motor form identifies a machine with a separately documented rotor circuit. The rotor connections and associated control or starting equipment remain distinct from the stator's three-phase supply.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace stator and rotor circuits independently.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify stator terminals","Show rotor connections","Reference starting/control circuit"],"distinction":"A wound-rotor machine differs electrically from a cage-rotor motor without accessible rotor terminals.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — 3 Phase Motors"},{"label":"Public vendor block name","value":"HMO1M4 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-392101fd-a88c-4bac-96cd-1c676094c262","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["wound-rotor-induction-motor","motor","contactor"],"artwork":"edu-ansi-wound-rotor-induction-motor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented 3 Phase Motors functional form","counterpart":"wound-rotor-induction-motor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-wound-rotor-induction-motor","illustration":"https://eloragrid.ai/library/illustrations/ansi-wound-rotor-induction-motor.svg"},{"slug":"ansi-dc-motor","name":"ANSI/IEEE dc motor symbol","kind":"symbol","abbreviation":"M DC","aliases":["IEEE dc motor symbol","ANSI dc motor symbol","HMO1M6"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for dc motor, with public vendor evidence and drawing-reading notes.","description":["The DC motor form identifies a documented direct-current load. Its armature path and any field supply or series connection must be established from the selected machine arrangement, rather than assuming one excitation method.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Follow armature polarity and field references separately.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State DC voltage/rating","Identify armature terminals","Reference excitation circuit"],"distinction":"A DC motor form is not automatically a permanent-magnet motor form.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — DC Motors"},{"label":"Public vendor block name","value":"HMO1M6 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-6a65d995-18bc-4a3c-a34e-c6bb276e8410","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["dc-motor","motor","contactor"],"artwork":"edu-ansi-dc-motor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented DC Motors functional form","counterpart":"dc-motor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-dc-motor","illustration":"https://eloragrid.ai/library/illustrations/ansi-dc-motor.svg"},{"slug":"ansi-permanent-magnet-dc-motor","name":"ANSI/IEEE permanent-magnet dc motor symbol","kind":"symbol","abbreviation":"M DC PM","aliases":["IEEE permanent-magnet dc motor symbol","ANSI permanent-magnet dc motor symbol","HMO1M13"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for permanent-magnet dc motor, with public vendor evidence and drawing-reading notes.","description":["The permanent-magnet DC motor form identifies a machine using a permanent magnetic field. Its electrical drawing focuses on armature and control connections while mechanical motor data establishes the driven application and rating.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Do not add a separate field-supply circuit unless the actual machine requires it.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Show armature polarity","State motor rating","Reference control arrangement"],"distinction":"Permanent-magnet excitation differs from a separately excited electrical field winding.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — DC Motors"},{"label":"Public vendor block name","value":"HMO1M13 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-6a65d995-18bc-4a3c-a34e-c6bb276e8410","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["permanent-magnet-dc-motor","motor","contactor"],"artwork":"edu-ansi-permanent-magnet-dc-motor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented DC Motors functional form","counterpart":"permanent-magnet-dc-motor","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-permanent-magnet-dc-motor","illustration":"https://eloragrid.ai/library/illustrations/ansi-permanent-magnet-dc-motor.svg"},{"slug":"ansi-three-phase-synchronous-generator","name":"ANSI/IEEE three-phase synchronous generator symbol","kind":"symbol","abbreviation":"G 3PH SYNC","aliases":["IEEE three-phase synchronous generator symbol","ANSI three-phase synchronous generator symbol","HPW1G7"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for three-phase synchronous generator, with public vendor evidence and drawing-reading notes.","description":["The three-phase synchronous generator form identifies an AC source whose terminals, neutral and excitation are documented separately. Measurement and protection interfaces must be located on the source circuit rather than inferred from the generator circle.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace the excitation and sensing paths with the generator-control references.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State output ratings","Show neutral/earthing","Reference excitation/protection circuits"],"distinction":"A generator electrical symbol is different from the complete engine-generator package footprint.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Generators"},{"label":"Public vendor block name","value":"HPW1G7 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-6a9fa93b-3010-4274-ae51-20db3520999c","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["three-phase-synchronous-generator","generator","25-synchronism-check"],"artwork":"edu-ansi-three-phase-synchronous-generator","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Generators functional form","counterpart":"three-phase-synchronous-generator","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-three-phase-synchronous-generator","illustration":"https://eloragrid.ai/library/illustrations/ansi-three-phase-synchronous-generator.svg"},{"slug":"ansi-dc-generator","name":"ANSI/IEEE dc generator symbol","kind":"symbol","abbreviation":"G DC","aliases":["IEEE dc generator symbol","ANSI dc generator symbol","HPW1G9"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for dc generator, with public vendor evidence and drawing-reading notes.","description":["The DC generator form identifies a documented source of direct-current output. Polarity and excitation connections establish how the generated circuit supplies its load, while the mechanical prime mover is referenced separately.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read source polarity before tracing downstream DC distribution.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State output rating","Mark positive/negative terminals","Reference excitation arrangement"],"distinction":"A DC source-generating function differs from a DC motor load despite related machine principles.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Generators"},{"label":"Public vendor block name","value":"HPW1G9 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-6a9fa93b-3010-4274-ae51-20db3520999c","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["dc-generator","generator","25-synchronism-check"],"artwork":"edu-ansi-dc-generator","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Generators functional form","counterpart":"dc-generator","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-dc-generator","illustration":"https://eloragrid.ai/library/illustrations/ansi-dc-generator.svg"},{"slug":"ansi-indicator-lamp","name":"ANSI/IEEE indicator lamp symbol","kind":"symbol","abbreviation":"Lamp","aliases":["IEEE indicator lamp symbol","ANSI indicator lamp symbol","HLT1H24"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for indicator lamp, with public vendor evidence and drawing-reading notes.","description":["The incandescent lamp form identifies a visual indication load in the named vendor library. Its colour, supply and indicated condition are separate annotations; illumination must be interpreted from the connected signal path.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Follow the signal that energises the lamp.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State lamp voltage/colour","Name indicated condition","Reference signal contact"],"distinction":"A lamp lit from a command circuit does not necessarily confirm the commanded equipment has moved.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Pilot Lights"},{"label":"Public vendor block name","value":"HLT1H24 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-8a9ed531-0a72-4c1d-b11f-72f5dac0ffbe","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["indicator-lamp","normally-open-contact","relay-coil","plc-io"],"artwork":"edu-ansi-indicator-lamp","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Pilot Lights functional form","counterpart":"indicator-lamp","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-indicator-lamp","illustration":"https://eloragrid.ai/library/illustrations/ansi-indicator-lamp.svg"},{"slug":"ansi-transformer-fed-indicator-lamp","name":"ANSI/IEEE transformer-fed indicator lamp symbol","kind":"symbol","abbreviation":"LAMP TX","aliases":["IEEE transformer-fed indicator lamp symbol","ANSI transformer-fed indicator lamp symbol","HLT1H23A"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for transformer-fed indicator lamp, with public vendor evidence and drawing-reading notes.","description":["The transformer-fed lamp form identifies an indicator assembly with a documented internal voltage-conversion arrangement. Wiring uses the assembly input rating, while the internal lamp function explains the indication.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Separate assembly input voltage from internal lamp voltage.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State input rating","Identify assembly terminals","Name indicated condition"],"distinction":"A lamp's built-in transformer is different from a separately supplied panel control transformer.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Transformer Lights"},{"label":"Public vendor block name","value":"HLT1H23A (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-37d8a291-6170-4348-820d-d9a03321186d","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["transformer-fed-indicator-lamp","indicator-lamp","relay-coil"],"artwork":"edu-ansi-transformer-fed-indicator-lamp","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Transformer Lights functional form","counterpart":"transformer-fed-indicator-lamp","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-transformer-fed-indicator-lamp","illustration":"https://eloragrid.ai/library/illustrations/ansi-transformer-fed-indicator-lamp.svg"},{"slug":"ansi-push-to-test-indicator-lamp","name":"ANSI/IEEE push-to-test indicator lamp symbol","kind":"symbol","abbreviation":"LAMP TEST","aliases":["IEEE push-to-test indicator lamp symbol","ANSI push-to-test indicator lamp symbol","HLT1RP"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for push-to-test indicator lamp, with public vendor evidence and drawing-reading notes.","description":["The press-to-test lamp form combines indication and a documented local test path. The normal signal and test supply may be different circuit paths, and the test does not automatically verify the monitored equipment feedback.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace the test path independently of the normal alarm or status contact.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify normal signal","Show test connection","State lamp supply"],"distinction":"A lamp-test operation and a complete alarm-system test are different verification functions.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Push to Test Lights"},{"label":"Public vendor block name","value":"HLT1RP (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-75e2013f-4032-43f0-aa2b-800c82135188","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["push-to-test-indicator-lamp","indicator-lamp","relay-coil"],"artwork":"edu-ansi-push-to-test-indicator-lamp","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Push to Test Lights functional form","counterpart":"push-to-test-indicator-lamp","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-push-to-test-indicator-lamp","illustration":"https://eloragrid.ai/library/illustrations/ansi-push-to-test-indicator-lamp.svg"},{"slug":"ansi-led-indicator-lamp","name":"ANSI/IEEE led indicator lamp symbol","kind":"symbol","abbreviation":"LAMP LED","aliases":["IEEE led indicator lamp symbol","ANSI led indicator lamp symbol","HLT1H25"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for led indicator lamp, with public vendor evidence and drawing-reading notes.","description":["The LED indicator form identifies a documented panel indication assembly using a light-emitting semiconductor. Its rated input and any polarity requirement belong to the complete assembly rather than to an assumed bare LED.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read the assembly terminal and supply data.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["State indicator voltage","Preserve specified polarity","Name visual signal meaning"],"distinction":"A panel LED indicator may contain internal limiting or protection components absent from a bare LED symbol.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — LEDs"},{"label":"Public vendor block name","value":"HLT1H25 (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-21296086-a519-4a08-b8ac-0aff670b8f53","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["led-indicator-lamp","indicator-lamp","relay-coil"],"artwork":"edu-ansi-led-indicator-lamp","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented LEDs functional form","counterpart":"led-indicator-lamp","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-led-indicator-lamp","illustration":"https://eloragrid.ai/library/illustrations/ansi-led-indicator-lamp.svg"},{"slug":"ansi-on-delay-normally-open-contact","name":"ANSI/IEEE on-delay normally-open contact symbol","kind":"symbol","abbreviation":"TON NO","aliases":["IEEE on-delay normally-open contact symbol","ANSI on-delay normally-open contact symbol","HTD21N"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for on-delay normally-open contact, with public vendor evidence and drawing-reading notes.","description":["The on-delay NO contact form specifically describes a delayed-closing transition. Its timer reference supplies the initiating condition and interval, while the unoperated contact remains open; release or reset behaviour comes from the documented timing chart.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Separate the delay-close transition from the contact's return action.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Link timer element","State closing delay","Reference reset behaviour"],"distinction":"A timed output contact differs from the timer coil or trigger that initiates its timing.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Time Delay Relays"},{"label":"Public vendor block name","value":"HTD21N (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-bbff0443-6ea2-4a05-a761-f411e16ba070","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["on-delay-normally-open-contact","relay-coil","normally-closed-contact"],"artwork":"edu-ansi-on-delay-normally-open-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Time Delay Relays functional form","counterpart":"on-delay-normally-open-contact","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-on-delay-normally-open-contact","illustration":"https://eloragrid.ai/library/illustrations/ansi-on-delay-normally-open-contact.svg"},{"slug":"ansi-on-delay-normally-closed-contact","name":"ANSI/IEEE on-delay normally-closed contact symbol","kind":"symbol","abbreviation":"TON NC","aliases":["IEEE on-delay normally-closed contact symbol","ANSI on-delay normally-closed contact symbol","HTD22N"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for on-delay normally-closed contact, with public vendor evidence and drawing-reading notes.","description":["The on-delay NC contact form specifically describes delayed opening from its reference closed state. The controlled path remains continuous while the specified delay runs, so the timer tag and timing condition are essential circuit-reading information.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Trace the permissive or command during the delay interval.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Identify timer tag","State opening delay","Reference reset condition"],"distinction":"Normally closed describes the initial contact state while on-delay identifies the specified operating transition.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Time Delay Relays"},{"label":"Public vendor block name","value":"HTD22N (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-bbff0443-6ea2-4a05-a761-f411e16ba070","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["on-delay-normally-closed-contact","relay-coil","normally-closed-contact"],"artwork":"edu-ansi-on-delay-normally-closed-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Time Delay Relays functional form","counterpart":"on-delay-normally-closed-contact","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-on-delay-normally-closed-contact","illustration":"https://eloragrid.ai/library/illustrations/ansi-on-delay-normally-closed-contact.svg"},{"slug":"ansi-off-delay-normally-open-contact","name":"ANSI/IEEE off-delay normally-open contact symbol","kind":"symbol","abbreviation":"TOFF NO","aliases":["IEEE off-delay normally-open contact symbol","ANSI off-delay normally-open contact symbol","HTD21F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for off-delay normally-open contact, with public vendor evidence and drawing-reading notes.","description":["The off-delay NO contact form identifies instant closing on the documented operation and delayed opening on release. This sequence is distinct from merely marking a contact as normally open, and auxiliary-supply behaviour must be checked separately.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Read instant close and delayed release as two distinct transitions.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Link trigger/timer","State release interval","Reference supply-loss behaviour"],"distinction":"Off-delay NO output is not equivalent to an on-delay NC output under every operating sequence.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Time Delay Relays"},{"label":"Public vendor block name","value":"HTD21F (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-bbff0443-6ea2-4a05-a761-f411e16ba070","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["off-delay-normally-open-contact","relay-coil","normally-closed-contact"],"artwork":"edu-ansi-off-delay-normally-open-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Time Delay Relays functional form","counterpart":"off-delay-normally-open-contact","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-off-delay-normally-open-contact","illustration":"https://eloragrid.ai/library/illustrations/ansi-off-delay-normally-open-contact.svg"},{"slug":"ansi-off-delay-normally-closed-contact","name":"ANSI/IEEE off-delay normally-closed contact symbol","kind":"symbol","abbreviation":"TOFF NC","aliases":["IEEE off-delay normally-closed contact symbol","ANSI off-delay normally-closed contact symbol","HTD22F"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for off-delay normally-closed contact, with public vendor evidence and drawing-reading notes.","description":["The off-delay NC contact form identifies instant opening on operation and a delayed return to the documented closed state. The circuit remains interrupted during the specified release interval, with supply-loss handling defined by the timer product.","This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic."],"readingNotes":["Identify which transition is delayed rather than assigning delay to both directions.","Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code."],"drawingChecklist":["Match timer reference","State return-to-closed delay","Reference trigger and supply conditions"],"distinction":"Contact polarity and timing direction are independent aspects of the output definition.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Time Delay Relays"},{"label":"Public vendor block name","value":"HTD22F (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-bbff0443-6ea2-4a05-a761-f411e16ba070","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["off-delay-normally-closed-contact","relay-coil","normally-closed-contact"],"artwork":"edu-ansi-off-delay-normally-closed-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Time Delay Relays functional form","counterpart":"off-delay-normally-closed-contact","reference":"Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted."},"url":"https://eloragrid.ai/symbols/ansi-off-delay-normally-closed-contact","illustration":"https://eloragrid.ai/library/illustrations/ansi-off-delay-normally-closed-contact.svg"},{"slug":"iec-positive-operation-direction-qualifier","name":"Positive-operation direction qualifier","kind":"symbol","abbreviation":"Q070109","aliases":["Positive-operation direction qualifier symbol","Q070109","Positive-operation direction qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A positive-operation qualifier identifies the documented mechanically imposed operating direction.","description":["A positive-operation qualifier identifies the documented mechanically imposed operating direction. The useful question is how movement is transmitted to the operated element. A control drawing can distinguish an imposed mechanical action from the device merely following a change in coil supply or a return spring.","Keep the actuator relationship visible when the contact is drawn elsewhere. Position feedback, electrical state and mechanical operating action belong to different parts of the documentation."],"readingNotes":["Read it together with the associated contact or mechanism and its operating-state legend.","Direction of operation does not specify a complete contact sequence or safety performance."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Read it together with the associated contact or mechanism and its operating-state legend.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Direction of operation does not specify a complete contact sequence or safety performance.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q070109 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Read it together with the associated contact or mechanism and its operating-state legend."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-positive-operation-direction-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Positive-operation direction qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-positive-operation-direction-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-positive-operation-direction-qualifier.svg"},{"slug":"iec-manual-operation-qualifier","name":"Manual-operation qualifier","kind":"symbol","abbreviation":"Q021301","aliases":["Manual-operation qualifier symbol","Q021301","Manual-operation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies an operator action applied to the associated mechanism.","description":["This qualifier identifies an operator action applied to the associated mechanism. A manual mechanism can operate a switch, valve, latch or adjustment without having its own electrical supply. The qualifier tells the reader how an action originates, while the main symbol still identifies what the device does.","For a local operating station, connect the operation mark to the relevant device tag and contact references. This avoids reading the operator itself as another electrical load."],"readingNotes":["Keep the qualifier linked to the device it operates rather than treating it as another electrical terminal.","Manual operation is a mechanism attribute, not a normally-open or normally-closed contact state."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Keep the qualifier linked to the device it operates rather than treating it as another electrical terminal.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Manual operation is a mechanism attribute, not a normally-open or normally-closed contact state.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021301 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Keep the qualifier linked to the device it operates rather than treating it as another electrical terminal."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-manual-operation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Manual-operation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-manual-operation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-manual-operation-qualifier.svg"},{"slug":"iec-protected-access-manual-operation-qualifier","name":"Protected-access manual-operation qualifier","kind":"symbol","abbreviation":"Q021302","aliases":["Protected-access manual-operation qualifier symbol","Q021302","Protected-access manual-operation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier indicates that manual access to the operating mechanism is protected or restricted.","description":["This qualifier indicates that manual access to the operating mechanism is protected or restricted. An operating mechanism may sit behind a cover or another access restriction. The qualifier draws attention to that access condition without describing the construction of the cover, lock or enclosure.","A circuit drawing can record the access-qualified operation while a GA or equipment document shows the actual opening and hardware. Do not infer a particular key sequence from this qualifier."],"readingNotes":["Record the actual access arrangement separately from the contact logic.","A protected-access indication does not specify a keyed lock, enclosure rating or permission system by itself."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Record the actual access arrangement separately from the contact logic.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A protected-access indication does not specify a keyed lock, enclosure rating or permission system by itself.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021302 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Record the actual access arrangement separately from the contact logic."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-protected-access-manual-operation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Protected-access manual-operation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-protected-access-manual-operation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-protected-access-manual-operation-qualifier.svg"},{"slug":"iec-pushbutton-operation-qualifier","name":"Pushbutton-operation qualifier","kind":"symbol","abbreviation":"Q021305","aliases":["Pushbutton-operation qualifier symbol","Q021305","Pushbutton-operation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A pushbutton qualifier identifies the actuation method of a contact or device.","description":["A pushbutton qualifier identifies the actuation method of a contact or device. A pushbutton is the operating member, whereas NO, NC and changeover describe contact behaviour. One button can operate multiple contacts with different normal states.","Keep the button tag and the contact cross-references consistent when the contact set is distributed across control rungs. Any latch or return behaviour needs its own explicit indication."],"readingNotes":["Show the electrical contact state and the actuator relationship as separate information.","A pushbutton actuator can operate several contact types; the qualifier alone does not identify them."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show the electrical contact state and the actuator relationship as separate information.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A pushbutton actuator can operate several contact types; the qualifier alone does not identify them.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021305 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Show the electrical contact state and the actuator relationship as separate information."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-pushbutton-operation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Pushbutton-operation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-pushbutton-operation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-pushbutton-operation-qualifier.svg"},{"slug":"iec-emergency-operation-qualifier","name":"Emergency-operation qualifier","kind":"symbol","abbreviation":"Q021308","aliases":["Emergency-operation qualifier symbol","Q021308","Emergency-operation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An emergency-operation qualifier marks the documented emergency actuation role.","description":["An emergency-operation qualifier marks the documented emergency actuation role. Emergency operation describes the role assigned to an action in the controls design. It does not reveal every device that stops, the retained services or the restart sequence.","Use the shutdown cause-and-effect document to connect the actuator with its actual outputs. The circuit must still identify contacts, monitored feedback and reset interfaces."],"readingNotes":["Cross-reference the shutdown function, reset method and affected equipment in the controls documentation.","The qualifier is not a complete emergency-stop safety circuit."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Cross-reference the shutdown function, reset method and affected equipment in the controls documentation.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The qualifier is not a complete emergency-stop safety circuit.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021308 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Cross-reference the shutdown function, reset method and affected equipment in the controls documentation."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-emergency-operation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Emergency-operation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-emergency-operation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-emergency-operation-qualifier.svg"},{"slug":"iec-rotary-operation-qualifier","name":"Rotary-operation qualifier","kind":"symbol","abbreviation":"Q021304","aliases":["Rotary-operation qualifier symbol","Q021304","Rotary-operation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies an operating mechanism actuated by rotation.","description":["This qualifier identifies an operating mechanism actuated by rotation. Rotation can operate a stepped selector, a maintained switch or a continuously adjusted element. The operating mark identifies the mechanical action without deciding which of those electrical functions is present.","Where discrete positions matter, provide the position names and a contact table. A rotary mark alone cannot distinguish local/remote selection from a voltage-measurement selector."],"readingNotes":["Identify the operating positions and associated contact table separately.","Rotary actuation does not imply continuous adjustment or a particular number of positions."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify the operating positions and associated contact table separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Rotary actuation does not imply continuous adjustment or a particular number of positions.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021304 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Identify the operating positions and associated contact table separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-rotary-operation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Rotary-operation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-rotary-operation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-rotary-operation-qualifier.svg"},{"slug":"iec-key-operation-qualifier","name":"Key-operation qualifier","kind":"symbol","abbreviation":"Q021313","aliases":["Key-operation qualifier symbol","Q021313","Key-operation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A key-operation qualifier identifies a mechanism requiring the specified key action.","description":["A key-operation qualifier identifies a mechanism requiring the specified key action. A key may control whether a mechanism can be moved or which positions are available. That access role is separate from the contact state produced by the movement.","Identify the keyed operator and any related locks through their tags. For an interlocking sequence, reference the sequence document instead of relying on one key-operation mark."],"readingNotes":["Cross-reference the key sequence and any related locking devices.","A keyed actuator and a trapped-key interlock perform different documented roles."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Cross-reference the key sequence and any related locking devices.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A keyed actuator and a trapped-key interlock perform different documented roles.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021313 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Cross-reference the key sequence and any related locking devices."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-key-operation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Key-operation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-key-operation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-key-operation-qualifier.svg"},{"slug":"iec-foot-operation-qualifier","name":"Foot-operation qualifier","kind":"symbol","abbreviation":"Q021310","aliases":["Foot-operation qualifier symbol","Q021310","Foot-operation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies actuation by a foot-operated mechanism.","description":["This qualifier identifies actuation by a foot-operated mechanism. A foot-operated mechanism allows an operator action to be applied through a pedal or similar member. The electrical function remains in the associated switch or control contacts.","A foot operation can initiate a pulse or maintain a state, depending on the device. Show the actual return and latch behaviour so the circuit is readable without guessing from the actuator type."],"readingNotes":["Link the actuation indication to its contact set and defined release behaviour.","A foot actuator may be momentary or maintained; its return behaviour needs a separate indication."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Link the actuation indication to its contact set and defined release behaviour.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A foot actuator may be momentary or maintained; its return behaviour needs a separate indication.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021310 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Link the actuation indication to its contact set and defined release behaviour."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-foot-operation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Foot-operation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-foot-operation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-foot-operation-qualifier.svg"},{"slug":"iec-lever-operation-qualifier","name":"Lever-operation qualifier","kind":"symbol","abbreviation":"Q021311","aliases":["Lever-operation qualifier symbol","Q021311","Lever-operation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A lever-operation qualifier identifies a manually moved lever mechanism.","description":["A lever-operation qualifier identifies a manually moved lever mechanism. A lever converts an operator movement into the action of another element. It can be used with position selection, mechanical release or electrical switching.","Separate the lever action from the contact normal state and identify any centre or retained positions. Where the mechanism reports position, give the feedback contact its own cross-reference."],"readingNotes":["Show the associated contact positions and any latching or return feature.","Lever shape does not determine the contact electrical state."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show the associated contact positions and any latching or return feature.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Lever shape does not determine the contact electrical state.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021311 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Show the associated contact positions and any latching or return feature."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-lever-operation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Lever-operation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-lever-operation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-lever-operation-qualifier.svg"},{"slug":"iec-crank-operation-qualifier","name":"Crank-operation qualifier","kind":"symbol","abbreviation":"Q021214","aliases":["Crank-operation qualifier symbol","Q021214","Crank-operation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies manual operation through a crank mechanism.","description":["This qualifier identifies manual operation through a crank mechanism. A crank supplies manual mechanical movement to a mechanism that may require several turns or a particular travel. Its role is different from a momentary electrical command to a motor drive.","The schematic records the operating method; the equipment instructions describe actual travel and operating procedure. Indicate any separate position switch rather than assuming the crank mark includes feedback."],"readingNotes":["Document the mechanism being moved and its travel or operating positions.","A crank-operated mechanism is not automatically a motor-driven mechanism."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document the mechanism being moved and its travel or operating positions.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A crank-operated mechanism is not automatically a motor-driven mechanism.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021214 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document the mechanism being moved and its travel or operating positions."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-crank-operation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Crank-operation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-crank-operation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-crank-operation-qualifier.svg"},{"slug":"iec-handwheel-operation-qualifier","name":"Handwheel-operation qualifier","kind":"symbol","abbreviation":"Q021309","aliases":["Handwheel-operation qualifier symbol","Q021309","Handwheel-operation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A handwheel qualifier identifies an operating mechanism moved by a wheel.","description":["A handwheel qualifier identifies an operating mechanism moved by a wheel. A handwheel can change a mechanism position or adjust an associated element. The qualifier describes that manual interface, not a particular electrical output characteristic.","For an adjustment function, identify the controlled quantity and any position indication separately. For switching, retain the contact diagram and position table."],"readingNotes":["Keep the wheel indication tied to the operated mechanism and its position description.","A wheel-actuated device can regulate or switch; the associated function must be stated."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Keep the wheel indication tied to the operated mechanism and its position description.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A wheel-actuated device can regulate or switch; the associated function must be stated.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021309 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Keep the wheel indication tied to the operated mechanism and its position description."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-handwheel-operation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Handwheel-operation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-handwheel-operation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-handwheel-operation-qualifier.svg"},{"slug":"iec-liquid-level-actuation-qualifier","name":"Liquid-level actuation qualifier","kind":"symbol","abbreviation":"Q021401","aliases":["Liquid-level actuation qualifier symbol","Q021401","Liquid-level actuation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies actuation responding to liquid level.","description":["This qualifier identifies actuation responding to liquid level. Level is the process condition that initiates operation. It should be distinguished from a drawing of the level instrument, the electrical output contact and the control action that follows.","In a generator fuel system, for example, a level input may participate in pump control or an alarm. The qualifier identifies the input principle while the cause-and-effect schedule states what happens."],"readingNotes":["State the sensed vessel or level point and the associated contact condition.","A level-actuation qualifier does not provide a setpoint or switch mounting height."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the sensed vessel or level point and the associated contact condition.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A level-actuation qualifier does not provide a setpoint or switch mounting height.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021401 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the sensed vessel or level point and the associated contact condition."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-liquid-level-actuation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Liquid-level actuation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-liquid-level-actuation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-liquid-level-actuation-qualifier.svg"},{"slug":"iec-event-count-actuation-qualifier","name":"Event-count actuation qualifier","kind":"symbol","abbreviation":"Q021402","aliases":["Event-count actuation qualifier symbol","Q021402","Event-count actuation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies operation related to a count of events.","description":["This qualifier identifies operation related to a count of events. A counted event can be an incoming pulse, an operating cycle or another defined occurrence. The threshold operates on the count, not simply on the passage of time.","Identify the count source and the reset relationship alongside the associated device. This makes the difference between a counter-triggered action and a timer-triggered action visible to a reviewer."],"readingNotes":["Identify what is counted and how the operating or reset condition is documented.","Event counting differs from elapsed-time operation."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify what is counted and how the operating or reset condition is documented.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Event counting differs from elapsed-time operation.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021402 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Identify what is counted and how the operating or reset condition is documented."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-event-count-actuation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Event-count actuation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-event-count-actuation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-event-count-actuation-qualifier.svg"},{"slug":"iec-liquid-flow-actuation-qualifier","name":"Liquid-flow actuation qualifier","kind":"symbol","abbreviation":"Q021403","aliases":["Liquid-flow actuation qualifier symbol","Q021403","Liquid-flow actuation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A liquid-flow qualifier identifies the process input operating a device.","description":["A liquid-flow qualifier identifies the process input operating a device. A flow-operated device responds to the movement of liquid through a documented process path. It can supply a switching condition without being a quantitative flow meter.","For a cooling-water interlock, keep the process connection, switch output and permissive logic separately identifiable. The circuit symbol does not supply the selected flow setting."],"readingNotes":["Show the process connection and the contact normal state separately.","The qualifier does not establish a flow threshold or measuring accuracy."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show the process connection and the contact normal state separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The qualifier does not establish a flow threshold or measuring accuracy.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021403 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Show the process connection and the contact normal state separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-liquid-flow-actuation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Liquid-flow actuation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-liquid-flow-actuation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-liquid-flow-actuation-qualifier.svg"},{"slug":"iec-gas-flow-actuation-qualifier","name":"Gas-flow actuation qualifier","kind":"symbol","abbreviation":"Q021404","aliases":["Gas-flow actuation qualifier symbol","Q021404","Gas-flow actuation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A gas-flow qualifier identifies operation responding to gas movement.","description":["A gas-flow qualifier identifies operation responding to gas movement. Gas-flow actuation identifies the moving-gas condition used by the device. It is not equivalent to a static pressure condition, even where both participate in one ventilation or process sequence.","Document the monitored path and the resulting electrical input. A separate description is needed for any alarm delay, operating threshold or fan permissive."],"readingNotes":["Distinguish the gas process from any adjacent liquid-flow or pressure measurement.","Gas flow and gas pressure are different process quantities."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Distinguish the gas process from any adjacent liquid-flow or pressure measurement.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Gas flow and gas pressure are different process quantities.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021404 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Distinguish the gas process from any adjacent liquid-flow or pressure measurement."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-gas-flow-actuation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Gas-flow actuation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-gas-flow-actuation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-gas-flow-actuation-qualifier.svg"},{"slug":"iec-motor-operation-qualifier","name":"Motor-operation qualifier","kind":"symbol","abbreviation":"Q021326","aliases":["Motor-operation qualifier symbol","Q021326","Motor-operation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies an operating mechanism driven by a motor.","description":["This qualifier identifies an operating mechanism driven by a motor. The motor is an operating mechanism for another device, rather than necessarily the main load shown on the power diagram. A motor-operated switching device has power contacts, a drive circuit and position information.","Show those interfaces through device tags and cross-references. The operating qualifier should remain attached to the switching function even if the motor control circuit appears on another sheet."],"readingNotes":["Cross-reference the drive supply and the operated device's position/control scheme.","A motor-operated switch still needs its own electrical switching function and interlock information."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Cross-reference the drive supply and the operated device's position/control scheme.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A motor-operated switch still needs its own electrical switching function and interlock information.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021326 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Cross-reference the drive supply and the operated device's position/control scheme."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-motor-operation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Motor-operation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-motor-operation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-motor-operation-qualifier.svg"},{"slug":"iec-timed-operation-qualifier","name":"Timed-operation qualifier","kind":"symbol","abbreviation":"Q021327","aliases":["Timed-operation qualifier symbol","Q021327","Timed-operation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A timed-operation qualifier identifies operation influenced by the documented timing function.","description":["A timed-operation qualifier identifies operation influenced by the documented timing function. A timing relationship describes when an action follows an initiating event. It does not decide whether the timing continues after the input disappears or how the function resets.","Document the input transition, the timed output and the intended timing mode. The main contact or actuator representation still supplies the resulting state."],"readingNotes":["State the trigger, timing mode and reset condition separately.","A generic timing indication does not distinguish on-delay, off-delay or pulse operation."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the trigger, timing mode and reset condition separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A generic timing indication does not distinguish on-delay, off-delay or pulse operation.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021327 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the trigger, timing mode and reset condition separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-timed-operation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Timed-operation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-timed-operation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-timed-operation-qualifier.svg"},{"slug":"iec-roller-operation-qualifier","name":"Roller-operation qualifier","kind":"symbol","abbreviation":"Q021315","aliases":["Roller-operation qualifier symbol","Q021315","Roller-operation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies contact with a roller-operated mechanism.","description":["This qualifier identifies contact with a roller-operated mechanism. A roller receives mechanical movement from another part and transfers it to the operating mechanism. It often helps explain a positional switch relationship on a machine or moving assembly.","Associate the mechanism with the physical position or movement it senses. Keep the corresponding electrical contact state and equipment tag explicit in the schematic."],"readingNotes":["Associate the roller with its driven position and contact operating condition.","A roller qualifier identifies actuation, not the electrical contact rating."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Associate the roller with its driven position and contact operating condition.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A roller qualifier identifies actuation, not the electrical contact rating.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021315 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Associate the roller with its driven position and contact operating condition."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-roller-operation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Roller-operation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-roller-operation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-roller-operation-qualifier.svg"},{"slug":"iec-cam-operation-qualifier","name":"Cam-operation qualifier","kind":"symbol","abbreviation":"Q021316","aliases":["Cam-operation qualifier symbol","Q021316","Cam-operation qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies operation by a cam mechanism.","description":["This qualifier identifies operation by a cam mechanism. A cam can operate contacts according to its mechanical position. The cam action explains the driving relationship while the contact table explains the electrical sequence.","Where several contacts share one cam-operated assembly, maintain the common device identity and list the states at each defined position. Do not infer that all contacts change at the same instant."],"readingNotes":["Relate the cam position or sequence to the associated contact truth table.","The cam qualifier alone does not show the full switching programme."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Relate the cam position or sequence to the associated contact truth table.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The cam qualifier alone does not show the full switching programme.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021316 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Relate the cam position or sequence to the associated contact truth table."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-cam-operation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Cam-operation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-cam-operation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-cam-operation-qualifier.svg"},{"slug":"iec-cam-profile-indication","name":"Cam-profile indication","kind":"symbol","abbreviation":"Q021317","aliases":["Cam-profile indication symbol","Q021317","Cam-profile indication IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A cam-profile indication describes the mechanical profile associated with an operating sequence.","description":["A cam-profile indication describes the mechanical profile associated with an operating sequence. A profile representation helps describe how a mechanical operating surface relates to the movement it produces. In an electrical diagram its purpose is the operating relationship rather than manufacturing geometry.","Use position or sequence references to link the profile to the operated contacts. Dimensions and machining detail belong in the relevant mechanical documentation."],"readingNotes":["Keep profile and position annotations consistent with the operated contacts.","A profile indication is not a manufacturing drawing of the physical cam."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Keep profile and position annotations consistent with the operated contacts.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A profile indication is not a manufacturing drawing of the physical cam.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021317 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Keep profile and position annotations consistent with the operated contacts."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-cam-profile-indication","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Cam-profile indication","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-cam-profile-indication","illustration":"https://eloragrid.ai/library/illustrations/iec-cam-profile-indication.svg"},{"slug":"iec-switch-position-function-qualifier","name":"Switch-position function qualifier","kind":"symbol","abbreviation":"Q070106","aliases":["Switch-position function qualifier symbol","Q070106","Switch-position function qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier marks the publisher's switch-position function element.","description":["This qualifier marks the publisher's switch-position function element. A position-function element contributes to the meaning of a compound switching representation. It is interpreted with the device boundary and contacts, not as a free-standing circuit element.","Preserve position labels and normal-state conventions when the compound symbol is expanded into several schematic contacts. Device tagging ties those views together."],"readingNotes":["Read position and switching action with the complete device symbol.","A function qualifier is an element of a compound symbol rather than a complete device record."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Read position and switching action with the complete device symbol.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A function qualifier is an element of a compound symbol rather than a complete device record.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q070106 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Read position and switching action with the complete device symbol."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-switch-position-function-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Switch-position function qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-switch-position-function-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-switch-position-function-qualifier.svg"},{"slug":"iec-isolation-function-qualifier","name":"Isolation-function qualifier","kind":"symbol","abbreviation":"Q070103","aliases":["Isolation-function qualifier symbol","Q070103","Isolation-function qualifier IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An isolation qualifier identifies the documented disconnector function attached to a switching representation.","description":["An isolation qualifier identifies the documented disconnector function attached to a switching representation. Isolation is a device function that must be distinguished from the ability to interrupt load current or clear faults. A switching representation can therefore carry an isolation qualifier alongside other functional information.","On an SLD, keep the associated device identity and switching function readable. The selected equipment data establishes the actual isolation and operating requirements."],"readingNotes":["Distinguish isolation capability from load interruption and automatic tripping.","The qualifier does not give isolation clearances or an equipment rating."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Distinguish isolation capability from load interruption and automatic tripping.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The qualifier does not give isolation clearances or an equipment rating.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q070103 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Distinguish isolation capability from load interruption and automatic tripping."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","generic-electrical-load"],"artwork":"edu-iec-isolation-function-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Isolation-function qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-isolation-function-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-isolation-function-qualifier.svg"},{"slug":"iec-switch-disconnector-function-qualifier","name":"Switch-disconnector function qualifier","kind":"symbol","abbreviation":"Q070104","aliases":["Switch-disconnector function qualifier symbol","Q070104","Switch-disconnector function qualifier IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies combined switching and isolation in the associated representation.","description":["This qualifier identifies combined switching and isolation in the associated representation. The combined function tells the reader that switching and isolation belong to the associated device representation. It does not add an overcurrent trip function.","When the SLD is expanded into a control schematic, retain the device tag and show any auxiliary contacts or operating mechanism separately. Protective devices elsewhere in the circuit remain separate items."],"readingNotes":["Read it with the complete power device and its operating-state information.","Switch-disconnector duty is different from automatic circuit-breaker interruption."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Read it with the complete power device and its operating-state information.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Switch-disconnector duty is different from automatic circuit-breaker interruption.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q070104 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Read it with the complete power device and its operating-state information."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","generic-electrical-load"],"artwork":"edu-iec-switch-disconnector-function-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Switch-disconnector function qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-switch-disconnector-function-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-switch-disconnector-function-qualifier.svg"},{"slug":"iec-circuit-breaker-function-qualifier","name":"Circuit-breaker function qualifier","kind":"symbol","abbreviation":"Q070102","aliases":["Circuit-breaker function qualifier symbol","Q070102","Circuit-breaker function qualifier IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A breaker-function qualifier identifies automatic interruption capability in the compound representation.","description":["A breaker-function qualifier identifies automatic interruption capability in the compound representation. The function element helps distinguish a breaker from other mechanically similar switching representations. Its associated protection may be shown as integrated releases or through a separately documented relay/trip circuit.","Record the breaker and trip interfaces consistently between the SLD and schematic. The function qualifier cannot replace the trip-unit or protection schedule."],"readingNotes":["Identify the actual trip functions and device schedule separately.","The qualifier does not specify thermal, magnetic or electronic trip details."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify the actual trip functions and device schedule separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The qualifier does not specify thermal, magnetic or electronic trip details.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q070102 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Identify the actual trip functions and device schedule separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","generic-electrical-load"],"artwork":"edu-iec-circuit-breaker-function-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Circuit-breaker function qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-circuit-breaker-function-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-circuit-breaker-function-qualifier.svg"},{"slug":"iec-power-contactor-function-qualifier","name":"Power-contactor function qualifier","kind":"symbol","abbreviation":"Q070101","aliases":["Power-contactor function qualifier symbol","Q070101","Power-contactor function qualifier IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier marks the power-contactor function of the associated switching device.","description":["This qualifier marks the power-contactor function of the associated switching device. A contactor function identifies switching under its control input, with main contacts and auxiliary contacts forming related circuit views. The operating coil may be drawn far from the power circuit.","Use common device tagging to link the coil and contact sets. Fault protection and overload functions should be identified through their actual devices rather than assumed from the contactor mark."],"readingNotes":["Cross-reference coil control and the device's main and auxiliary contacts.","A contactor function does not imply independent short-circuit protection."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Cross-reference coil control and the device's main and auxiliary contacts.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A contactor function does not imply independent short-circuit protection.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q070101 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Cross-reference coil control and the device's main and auxiliary contacts."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","generic-electrical-load"],"artwork":"edu-iec-power-contactor-function-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Power-contactor function qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-power-contactor-function-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-power-contactor-function-qualifier.svg"},{"slug":"iec-automatic-trip-qualifier","name":"Automatic-trip qualifier","kind":"symbol","abbreviation":"Q070105","aliases":["Automatic-trip qualifier symbol","Q070105","Automatic-trip qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An automatic-trip qualifier indicates that the associated mechanism can operate automatically under its documented condition.","description":["An automatic-trip qualifier indicates that the associated mechanism can operate automatically under its documented condition. An automatic trip describes an operating action initiated by a condition in the device or associated controls. The input that causes tripping may be protective, process-related or another documented trigger.","Show the trip source and resulting contact/device state through the circuit and cross-references. Reset, reclosure and return behaviour remain separate design information."],"readingNotes":["Identify the initiating protection or process condition in the surrounding circuit.","Automatic tripping and automatic return describe different parts of the operating sequence."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify the initiating protection or process condition in the surrounding circuit.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Automatic tripping and automatic return describe different parts of the operating sequence.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q070105 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Identify the initiating protection or process condition in the surrounding circuit."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-automatic-trip-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Automatic-trip qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-automatic-trip-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-automatic-trip-qualifier.svg"},{"slug":"iec-spring-return-qualifier","name":"Spring-return qualifier","kind":"symbol","abbreviation":"Q070107","aliases":["Spring-return qualifier symbol","Q070107","Spring-return qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A spring-return qualifier indicates return after the specified operating force is removed.","description":["A spring-return qualifier indicates return after the specified operating force is removed. Removing the operating force allows the mechanism to return to its specified resting position. A centre-return selector and a returning pushbutton can share this principle while operating different contact sets.","Make the resting position explicit in the position table or legend. If several contacts are linked to the actuator, record their individual states in that resting position."],"readingNotes":["Show which position is the resting position and which contacts change during return.","Spring return does not define whether the resting contacts are open or closed."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show which position is the resting position and which contacts change during return.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Spring return does not define whether the resting contacts are open or closed.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q070107 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Show which position is the resting position and which contacts change during return."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-spring-return-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Spring-return qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-spring-return-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-spring-return-qualifier.svg"},{"slug":"iec-maintained-position-qualifier","name":"Maintained-position qualifier","kind":"symbol","abbreviation":"Q070108","aliases":["Maintained-position qualifier symbol","Q070108","Maintained-position qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A maintained-position qualifier indicates that the operating position remains after actuation.","description":["A maintained-position qualifier indicates that the operating position remains after actuation. The mechanism retains the selected position after the operating action ends. The next manual action, release or other documented event changes that retained state.","This is especially useful when a maintained selector and a momentary command appear in the same control circuit. Draw their contact states and release relationships explicitly."],"readingNotes":["State the action required to release or change the maintained state.","Maintained operation differs from a timed hold and from automatic spring return."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the action required to release or change the maintained state.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Maintained operation differs from a timed hold and from automatic spring return.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q070108 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the action required to release or change the maintained state."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-operating","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-maintained-position-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Maintained-position qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Operating-device and function qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-maintained-position-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-maintained-position-qualifier.svg"},{"slug":"iec-one-way-linear-motion-qualifier","name":"One-way linear-motion qualifier","kind":"symbol","abbreviation":"Q020401R","aliases":["One-way linear-motion qualifier symbol","Q020401R","One-way linear-motion qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A linear-motion qualifier identifies movement or force in one documented direction.","description":["A linear-motion qualifier identifies movement or force in one documented direction. The arrow describes a mechanical movement or force along a line. The same logical relationship can be drawn in another orientation without changing the mechanism.","Distinguish movement arrows from electrical continuation arrows by their context and association with the mechanism. A movement diagram should name the driven element and reference its positions."],"readingNotes":["Orient the indication to the actual diagram relationship; do not treat its drawing direction as an equipment compass bearing.","Rotating the same motion indication does not create another engineering function."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Orient the indication to the actual diagram relationship; do not treat its drawing direction as an equipment compass bearing.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Rotating the same motion indication does not create another engineering function.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020401R (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Orient the indication to the actual diagram relationship; do not treat its drawing direction as an equipment compass bearing."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-linear","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-one-way-linear-motion-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"One-way linear-motion qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Linear force and motion qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-one-way-linear-motion-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-one-way-linear-motion-qualifier.svg"},{"slug":"iec-two-way-linear-motion-qualifier","name":"Two-way linear-motion qualifier","kind":"symbol","abbreviation":"Q020402","aliases":["Two-way linear-motion qualifier symbol","Q020402","Two-way linear-motion qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies motion or force in both directions along a linear path.","description":["This qualifier identifies motion or force in both directions along a linear path. Opposite directions of travel belong to one linear movement relationship. Separate contacts or sensors may identify each end of travel or an intermediate position.","A control schematic should relate forward/reverse or extend/retract commands to the same mechanism tag. Limit positions and interlocks are described by their own elements."],"readingNotes":["Document the operated mechanism and its limit or rest positions.","Bidirectional motion does not imply simultaneous motion in both directions."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document the operated mechanism and its limit or rest positions.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Bidirectional motion does not imply simultaneous motion in both directions.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020402 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document the operated mechanism and its limit or rest positions."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-linear","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-two-way-linear-motion-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Two-way linear-motion qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Linear force and motion qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-two-way-linear-motion-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-two-way-linear-motion-qualifier.svg"},{"slug":"iec-transition-indication","name":"Transition indication","kind":"symbol","abbreviation":"Q101101","aliases":["Transition indication symbol","Q101101","Transition indication IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A transition indication identifies a documented change between positions or states.","description":["A transition indication identifies a documented change between positions or states. A transition describes movement between documented states rather than a steady-state position. Its meaning depends on the source state, destination state and initiating event.","In a sequence or operating-state drawing, retain those state labels close to the transition. An electrical contact diagram still needs its own normal-state convention."],"readingNotes":["Define the states and the event that causes the transition in the diagram context.","A transition annotation is distinct from a steady-state device symbol."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Define the states and the event that causes the transition in the diagram context.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A transition annotation is distinct from a steady-state device symbol.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q101101 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Define the states and the event that causes the transition in the diagram context."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-linear","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-transition-indication","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Transition indication","reference":"Autodesk IEC-60617 Symbol Preview — Linear force and motion qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-transition-indication","illustration":"https://eloragrid.ai/library/illustrations/iec-transition-indication.svg"},{"slug":"iec-one-way-rotary-motion-qualifier","name":"One-way rotary-motion qualifier","kind":"symbol","abbreviation":"Q020403","aliases":["One-way rotary-motion qualifier symbol","Q020403","One-way rotary-motion qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A rotary-motion qualifier identifies movement or torque in one direction of rotation.","description":["A rotary-motion qualifier identifies movement or torque in one direction of rotation. A rotary indication records the direction assigned to a mechanical movement. Its viewpoint matters when the mechanism and its control circuit are shown in separate drawings.","Use a stated viewing reference where rotation direction is significant. The arrow does not substitute for actual machine terminals, wiring or a phase-sequence specification."],"readingNotes":["Relate the direction to the described mechanism and viewing convention.","An arrow direction is not a complete motor phase-sequence or rotation instruction."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Relate the direction to the described mechanism and viewing convention.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"An arrow direction is not a complete motor phase-sequence or rotation instruction.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020403 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Relate the direction to the described mechanism and viewing convention."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-rotary","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-one-way-rotary-motion-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"One-way rotary-motion qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Rotary force and motion qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-one-way-rotary-motion-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-one-way-rotary-motion-qualifier.svg"},{"slug":"iec-two-way-rotary-motion-qualifier","name":"Two-way rotary-motion qualifier","kind":"symbol","abbreviation":"Q020404","aliases":["Two-way rotary-motion qualifier symbol","Q020404","Two-way rotary-motion qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies a mechanism capable of rotary movement in either direction.","description":["This qualifier identifies a mechanism capable of rotary movement in either direction. Both directions of rotation are part of the represented mechanism. The reversal can be controlled electrically or mechanically, depending on the selected equipment.","Identify the two command paths and any permitted transition between them. Interlocks and feedback should be shown as actual circuit relationships rather than inferred from the double arrow."],"readingNotes":["Cross-reference forward/reverse commands and any position limits.","Reversible rotation and unrestricted continuous rotation are different attributes."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Cross-reference forward/reverse commands and any position limits.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Reversible rotation and unrestricted continuous rotation are different attributes.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020404 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Cross-reference forward/reverse commands and any position limits."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-rotary","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-two-way-rotary-motion-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Two-way rotary-motion qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Rotary force and motion qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-two-way-rotary-motion-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-two-way-rotary-motion-qualifier.svg"},{"slug":"iec-limited-two-way-rotary-motion-qualifier","name":"Limited two-way rotary-motion qualifier","kind":"symbol","abbreviation":"Q020405","aliases":["Limited two-way rotary-motion qualifier symbol","Q020405","Limited two-way rotary-motion qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies rotary movement in both directions over a limited travel.","description":["This qualifier identifies rotary movement in both directions over a limited travel. A mechanism can move clockwise and counterclockwise between defined positions without rotating indefinitely. This distinction is useful for actuators and position-changing mechanisms.","State the end positions or stops in the mechanism documentation. The qualifier itself supplies neither angular travel nor the electrical control sequence."],"readingNotes":["Record the mechanism's defined end positions separately.","A limited-travel qualifier gives no numerical angular range."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Record the mechanism's defined end positions separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A limited-travel qualifier gives no numerical angular range.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020405 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Record the mechanism's defined end positions separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-rotary","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-limited-two-way-rotary-motion-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Limited two-way rotary-motion qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Rotary force and motion qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-limited-two-way-rotary-motion-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-limited-two-way-rotary-motion-qualifier.svg"},{"slug":"iec-unidirectional-propagation-qualifier","name":"Unidirectional propagation qualifier","kind":"symbol","abbreviation":"Q020501","aliases":["Unidirectional propagation qualifier symbol","Q020501","Unidirectional propagation qualifier IEC reference"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier indicates a signal or propagation path with one documented direction.","description":["This qualifier indicates a signal or propagation path with one documented direction. The flow is an information or signal relationship, rather than necessarily a conductive power path. A sending element and receiving element can each need separate auxiliary supplies.","Label the signal and interface at each end. Keep supply conductors and signal-direction annotations visually distinct when both appear in the same diagram."],"readingNotes":["Identify the source, destination and signal type in the surrounding diagram.","Signal direction must not be confused with the direction of power flow."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify the source, destination and signal type in the surrounding diagram.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Signal direction must not be confused with the direction of power flow.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020501 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Identify the source, destination and signal type in the surrounding diagram."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-propagation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","plc-io"],"artwork":"edu-iec-unidirectional-propagation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Unidirectional propagation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Propagation and signal-flow qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-unidirectional-propagation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-unidirectional-propagation-qualifier.svg"},{"slug":"iec-simultaneous-bidirectional-propagation-qualifier","name":"Simultaneous bidirectional propagation qualifier","kind":"symbol","abbreviation":"Q020502","aliases":["Simultaneous bidirectional propagation qualifier symbol","Q020502","Simultaneous bidirectional propagation qualifier IEC reference"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier distinguishes a path supporting propagation in both directions at the same time.","description":["This qualifier distinguishes a path supporting propagation in both directions at the same time. The represented interface supports sending and receiving in opposite directions simultaneously. That operating relationship is separate from the physical media and protocol.","A communications drawing should identify each endpoint and the actual interface. The qualifier supplies a direction relationship without declaring a network implementation."],"readingNotes":["State the interface and communication arrangement represented.","A bidirectional graphic does not specify a communication protocol or throughput."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the interface and communication arrangement represented.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A bidirectional graphic does not specify a communication protocol or throughput.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020502 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the interface and communication arrangement represented."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-propagation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","plc-io"],"artwork":"edu-iec-simultaneous-bidirectional-propagation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Simultaneous bidirectional propagation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Propagation and signal-flow qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-simultaneous-bidirectional-propagation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-simultaneous-bidirectional-propagation-qualifier.svg"},{"slug":"iec-alternating-bidirectional-propagation-qualifier","name":"Alternating bidirectional propagation qualifier","kind":"symbol","abbreviation":"Q020503","aliases":["Alternating bidirectional propagation qualifier symbol","Q020503","Alternating bidirectional propagation qualifier IEC reference"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies opposite-direction propagation occurring alternately.","description":["This qualifier identifies opposite-direction propagation occurring alternately. The two directions are used at different times, making the temporal relationship different from simultaneous two-way propagation. The underlying link can still appear as a single path.","Record which functions send and receive and how the documented operation changes direction. Do not interpret the qualifier as two independent physical cables."],"readingNotes":["Describe the direction-changing or turn-taking arrangement separately.","Alternating bidirectional propagation differs from simultaneous bidirectional transmission."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Describe the direction-changing or turn-taking arrangement separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Alternating bidirectional propagation differs from simultaneous bidirectional transmission.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020503 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Describe the direction-changing or turn-taking arrangement separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-propagation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","plc-io"],"artwork":"edu-iec-alternating-bidirectional-propagation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Alternating bidirectional propagation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Propagation and signal-flow qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-alternating-bidirectional-propagation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-alternating-bidirectional-propagation-qualifier.svg"},{"slug":"iec-signal-transmission-qualifier","name":"Signal-transmission qualifier","kind":"symbol","abbreviation":"Q020504","aliases":["Signal-transmission qualifier symbol","Q020504","Signal-transmission qualifier IEC reference"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A transmission qualifier identifies the sending role of a signal interface.","description":["A transmission qualifier identifies the sending role of a signal interface. Transmission identifies the source role of a signal relationship. It can be used beside a transducer, communications interface or other function whose output is conveyed elsewhere.","Identify the receiving function through a tag or cross-reference. Signal units and electrical interface details belong in the associated I/O or communications schedule."],"readingNotes":["Label the signal and the connected receiving function.","A transmitter-role indication does not identify the physical medium or electrical levels."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Label the signal and the connected receiving function.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A transmitter-role indication does not identify the physical medium or electrical levels.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020504 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Label the signal and the connected receiving function."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-propagation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","plc-io"],"artwork":"edu-iec-signal-transmission-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Signal-transmission qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Propagation and signal-flow qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-signal-transmission-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-signal-transmission-qualifier.svg"},{"slug":"iec-signal-reception-qualifier","name":"Signal-reception qualifier","kind":"symbol","abbreviation":"Q020505","aliases":["Signal-reception qualifier symbol","Q020505","Signal-reception qualifier IEC reference"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A reception qualifier identifies the receiving role of a signal interface.","description":["A reception qualifier identifies the receiving role of a signal interface. Reception identifies the destination role of the represented signal relationship. It does not describe how the receiver is powered or what subsequent control action occurs.","Label the received signal and its source. Where one receiver participates in several control functions, use circuit references to connect the shared input to those functions."],"readingNotes":["Label the incoming signal and the supplying transmitter or source.","Receiving a signal is distinct from supplying electrical power to the interface."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Label the incoming signal and the supplying transmitter or source.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Receiving a signal is distinct from supplying electrical power to the interface.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020505 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Label the incoming signal and the supplying transmitter or source."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-propagation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","plc-io"],"artwork":"edu-iec-signal-reception-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Signal-reception qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Propagation and signal-flow qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-signal-reception-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-signal-reception-qualifier.svg"},{"slug":"iec-outbound-energy-flow-qualifier","name":"Outbound-energy-flow qualifier","kind":"symbol","abbreviation":"Q020506","aliases":["Outbound-energy-flow qualifier symbol","Q020506","Outbound-energy-flow qualifier IEC reference"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An outbound-energy qualifier identifies energy leaving the represented device or boundary.","description":["An outbound-energy qualifier identifies energy leaving the represented device or boundary. The arrow’s meaning is relative to a chosen device or system boundary. A converter may export energy through one port while consuming energy at another.","State the boundary and operating mode alongside the diagram. Keep import/export sign conventions consistent with the metering and control documentation."],"readingNotes":["Define the boundary and the operating condition for which the arrow is meaningful.","Energy-flow direction can differ from the drawing's reference current direction."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Define the boundary and the operating condition for which the arrow is meaningful.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Energy-flow direction can differ from the drawing's reference current direction.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020506 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Define the boundary and the operating condition for which the arrow is meaningful."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-energy","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","plc-io"],"artwork":"edu-iec-outbound-energy-flow-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Outbound-energy-flow qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Energy-flow qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-outbound-energy-flow-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-outbound-energy-flow-qualifier.svg"},{"slug":"iec-inbound-energy-flow-qualifier","name":"Inbound-energy-flow qualifier","kind":"symbol","abbreviation":"Q020507","aliases":["Inbound-energy-flow qualifier symbol","Q020507","Inbound-energy-flow qualifier IEC reference"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An inbound-energy qualifier identifies energy entering a represented device or system.","description":["An inbound-energy qualifier identifies energy entering a represented device or system. Energy is shown entering the represented boundary in the documented mode. The source may be the grid, a generator or another system interface.","Identify the receiving device and the source path without confusing them with the diagram’s current-reference arrows. Capacity and energy limits remain in the equipment and operating schedules."],"readingNotes":["Name the receiving boundary and the energy interface.","The qualifier does not supply a power value or establish an import/export limit."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Name the receiving boundary and the energy interface.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The qualifier does not supply a power value or establish an import/export limit.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020507 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Name the receiving boundary and the energy interface."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-energy","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","plc-io"],"artwork":"edu-iec-inbound-energy-flow-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Inbound-energy-flow qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Energy-flow qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-inbound-energy-flow-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-inbound-energy-flow-qualifier.svg"},{"slug":"iec-bidirectional-energy-flow-qualifier","name":"Bidirectional-energy-flow qualifier","kind":"symbol","abbreviation":"Q020508","aliases":["Bidirectional-energy-flow qualifier symbol","Q020508","Bidirectional-energy-flow qualifier IEC reference"],"category":"microgrid-systems","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies an energy interface intended to operate in both directions.","description":["This qualifier identifies an energy interface intended to operate in both directions. Storage and conversion systems can exchange energy in opposite directions under different modes. A bidirectional qualifier describes that capability without defining when either direction is enabled.","Name the charge/discharge or import/export modes and their interfaces. The operating strategy and protective controls are documented separately from the energy-flow mark."],"readingNotes":["State the supported operating modes and associated control conditions.","A bidirectional energy indication does not by itself certify grid-forming or islanding capability."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the supported operating modes and associated control conditions.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A bidirectional energy indication does not by itself certify grid-forming or islanding capability.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020508 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the supported operating modes and associated control conditions."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-energy","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","plc-io"],"artwork":"edu-iec-bidirectional-energy-flow-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Bidirectional-energy-flow qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Energy-flow qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-bidirectional-energy-flow-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-bidirectional-energy-flow-qualifier.svg"},{"slug":"iec-thermal-effect-qualifier","name":"Thermal-effect qualifier","kind":"symbol","abbreviation":"Q020801","aliases":["Thermal-effect qualifier symbol","Q020801","Thermal-effect qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A thermal-effect qualifier identifies a function responding to or producing heat-related behaviour.","description":["A thermal-effect qualifier identifies a function responding to or producing heat-related behaviour.","State whether temperature is the initiating condition or an output effect.","A thermal qualifier is different from a complete temperature sensor or a trip-setting value."],"readingNotes":["State whether temperature is the initiating condition or an output effect.","A thermal qualifier is different from a complete temperature sensor or a trip-setting value."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State whether temperature is the initiating condition or an output effect.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A thermal qualifier is different from a complete temperature sensor or a trip-setting value.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020801 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State whether temperature is the initiating condition or an output effect."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-effect","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-thermal-effect-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Thermal-effect qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Physical-effect qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-thermal-effect-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-thermal-effect-qualifier.svg"},{"slug":"iec-magnetic-effect-qualifier","name":"Magnetic-effect qualifier","kind":"symbol","abbreviation":"Q020802","aliases":["Magnetic-effect qualifier symbol","Q020802","Magnetic-effect qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies a function involving a magnetic effect.","description":["This qualifier identifies a function involving a magnetic effect.","Link it to the associated sensing or operating element.","The qualifier does not identify the magnetic circuit material or force magnitude."],"readingNotes":["Link it to the associated sensing or operating element.","The qualifier does not identify the magnetic circuit material or force magnitude."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Link it to the associated sensing or operating element.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The qualifier does not identify the magnetic circuit material or force magnitude.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020802 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Link it to the associated sensing or operating element."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-effect","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-magnetic-effect-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Magnetic-effect qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Physical-effect qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-magnetic-effect-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-magnetic-effect-qualifier.svg"},{"slug":"iec-magnetostrictive-effect-qualifier","name":"Magnetostrictive-effect qualifier","kind":"symbol","abbreviation":"Q020803","aliases":["Magnetostrictive-effect qualifier symbol","Q020803","Magnetostrictive-effect qualifier IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A magnetostrictive qualifier identifies a function using the relationship between magnetisation and mechanical deformation.","description":["A magnetostrictive qualifier identifies a function using the relationship between magnetisation and mechanical deformation.","Identify the sensing or actuation application in the device description.","Magnetostriction is distinct from ordinary electromagnetic attraction."],"readingNotes":["Identify the sensing or actuation application in the device description.","Magnetostriction is distinct from ordinary electromagnetic attraction."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify the sensing or actuation application in the device description.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Magnetostriction is distinct from ordinary electromagnetic attraction.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020803 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Identify the sensing or actuation application in the device description."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-effect","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-magnetostrictive-effect-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Magnetostrictive-effect qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Physical-effect qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-magnetostrictive-effect-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-magnetostrictive-effect-qualifier.svg"},{"slug":"iec-magnetic-field-effect-qualifier","name":"Magnetic-field-effect qualifier","kind":"symbol","abbreviation":"Q020804","aliases":["Magnetic-field-effect qualifier symbol","Q020804","Magnetic-field-effect qualifier IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies response to a magnetic field in the represented function.","description":["This qualifier identifies response to a magnetic field in the represented function.","Document the device type and measured or switching output separately.","A field-effect indication is not a complete magnetic sensor specification."],"readingNotes":["Document the device type and measured or switching output separately.","A field-effect indication is not a complete magnetic sensor specification."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document the device type and measured or switching output separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A field-effect indication is not a complete magnetic sensor specification.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020804 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document the device type and measured or switching output separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-effect","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-magnetic-field-effect-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Magnetic-field-effect qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Physical-effect qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-magnetic-field-effect-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-magnetic-field-effect-qualifier.svg"},{"slug":"iec-non-ionising-radiation-qualifier","name":"Non-ionising radiation qualifier","kind":"symbol","abbreviation":"Q020901","aliases":["Non-ionising radiation qualifier symbol","Q020901, Q020902","Non-ionising radiation qualifier IEC reference"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies the publisher's non-ionising radiation family, with the radiation role stated in the device description.","description":["This qualifier identifies the publisher's non-ionising radiation family, with the radiation role stated in the device description.","Describe the actual emitter or detector rather than relying on the qualifier alone.","Radiation type and signal direction need separate interpretation."],"readingNotes":["Describe the actual emitter or detector rather than relying on the qualifier alone.","Radiation type and signal direction need separate interpretation."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Describe the actual emitter or detector rather than relying on the qualifier alone.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Radiation type and signal direction need separate interpretation.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020901, Q020902 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Describe the actual emitter or detector rather than relying on the qualifier alone."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-radiation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","generic-electrical-load"],"artwork":"edu-iec-non-ionising-radiation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Non-ionising radiation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Radiation qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-non-ionising-radiation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-non-ionising-radiation-qualifier.svg"},{"slug":"iec-ionising-radiation-qualifier","name":"Ionising-radiation qualifier","kind":"symbol","abbreviation":"Q020903","aliases":["Ionising-radiation qualifier symbol","Q020903","Ionising-radiation qualifier IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An ionising-radiation qualifier identifies the radiation role attached to a measuring or operating function.","description":["An ionising-radiation qualifier identifies the radiation role attached to a measuring or operating function.","Reference the specified detector or source and its separate safety documentation.","The graphical role is not a radiation hazard sign or a device approval."],"readingNotes":["Reference the specified detector or source and its separate safety documentation.","The graphical role is not a radiation hazard sign or a device approval."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Reference the specified detector or source and its separate safety documentation.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The graphical role is not a radiation hazard sign or a device approval.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020903 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Reference the specified detector or source and its separate safety documentation."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-radiation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-ionising-radiation-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Ionising-radiation qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Radiation qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-ionising-radiation-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-ionising-radiation-qualifier.svg"},{"slug":"iec-presumed-fault-location-indication","name":"Presumed-fault-location indication","kind":"symbol","abbreviation":"Q021701","aliases":["Presumed-fault-location indication symbol","Q021701","Presumed-fault-location indication IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This indication marks the presumed location of a fault or failure in a diagnostic diagram.","description":["This indication marks the presumed location of a fault or failure in a diagnostic diagram.","State the evidence and uncertainty associated with the marked location.","A presumed fault location is not the same as a confirmed equipment defect."],"readingNotes":["State the evidence and uncertainty associated with the marked location.","A presumed fault location is not the same as a confirmed equipment defect."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the evidence and uncertainty associated with the marked location.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A presumed fault location is not the same as a confirmed equipment defect.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021701 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the evidence and uncertainty associated with the marked location."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-fault","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-presumed-fault-location-indication","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Presumed-fault-location indication","reference":"Autodesk IEC-60617 Symbol Preview — Fault-location and insulation-failure indications; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-presumed-fault-location-indication","illustration":"https://eloragrid.ai/library/illustrations/iec-presumed-fault-location-indication.svg"},{"slug":"iec-insulation-failure-indication","name":"Insulation-failure indication","kind":"symbol","abbreviation":"Q021702","aliases":["Insulation-failure indication symbol","Q021702","Insulation-failure indication IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An insulation-failure indication identifies the documented insulation-related failure condition.","description":["An insulation-failure indication identifies the documented insulation-related failure condition.","Mark the affected conductor, device or insulation boundary clearly.","A failure annotation does not give a resistance measurement or protection setting."],"readingNotes":["Mark the affected conductor, device or insulation boundary clearly.","A failure annotation does not give a resistance measurement or protection setting."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Mark the affected conductor, device or insulation boundary clearly.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A failure annotation does not give a resistance measurement or protection setting.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021702 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Mark the affected conductor, device or insulation boundary clearly."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-fault","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-insulation-failure-indication","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Insulation-failure indication","reference":"Autodesk IEC-60617 Symbol Preview — Fault-location and insulation-failure indications; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-insulation-failure-indication","illustration":"https://eloragrid.ai/library/illustrations/iec-insulation-failure-indication.svg"},{"slug":"iec-two-phase-winding-connection","name":"Two-phase winding connection","kind":"symbol","abbreviation":"Q060201","aliases":["Two-phase winding connection symbol","Q060201","Two-phase winding connection IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This connection qualifier identifies a two-phase winding arrangement in the publisher's reference family.","description":["This connection qualifier identifies a two-phase winding arrangement in the publisher's reference family.","Record terminal labels and the actual phase relationship in the machine or transformer schedule.","A two-phase winding indication should not be inferred from a two-wire supply label."],"readingNotes":["Record terminal labels and the actual phase relationship in the machine or transformer schedule.","A two-phase winding indication should not be inferred from a two-wire supply label."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Record terminal labels and the actual phase relationship in the machine or transformer schedule.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A two-phase winding indication should not be inferred from a two-wire supply label.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q060201 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Record terminal labels and the actual phase relationship in the machine or transformer schedule."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-two-phase-winding-connection","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Two-phase winding connection","reference":"Autodesk IEC-60617 Symbol Preview — Winding connection and supply-character qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-two-phase-winding-connection","illustration":"https://eloragrid.ai/library/illustrations/iec-two-phase-winding-connection.svg"},{"slug":"iec-partial-v-winding-connection","name":"Partial-V winding connection","kind":"symbol","abbreviation":"Q060202","aliases":["Partial-V winding connection symbol","Q060202","Partial-V winding connection IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies the publisher's partial-V three-phase winding form.","description":["This qualifier identifies the publisher's partial-V three-phase winding form.","Use the complete winding diagram and selected equipment documentation to interpret its terminals.","The reference name is not a complete open-delta transformer bank design."],"readingNotes":["Use the complete winding diagram and selected equipment documentation to interpret its terminals.","The reference name is not a complete open-delta transformer bank design."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Use the complete winding diagram and selected equipment documentation to interpret its terminals.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The reference name is not a complete open-delta transformer bank design.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q060202 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Use the complete winding diagram and selected equipment documentation to interpret its terminals."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-partial-v-winding-connection","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Partial-V winding connection","reference":"Autodesk IEC-60617 Symbol Preview — Winding connection and supply-character qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-partial-v-winding-connection","illustration":"https://eloragrid.ai/library/illustrations/iec-partial-v-winding-connection.svg"},{"slug":"iec-four-phase-winding-with-accessible-connection","name":"Four-phase winding with accessible connection","kind":"symbol","abbreviation":"Q060203","aliases":["Four-phase winding with accessible connection symbol","Q060203","Four-phase winding with accessible connection IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies a four-phase winding form with an accessible connection described by the publisher as accessible ground.","description":["This qualifier identifies a four-phase winding form with an accessible connection described by the publisher as accessible ground.","Identify that connection in the actual winding and equipment diagram rather than assuming its bonding role.","An accessible common point is not automatically a protective-earth terminal."],"readingNotes":["Identify that connection in the actual winding and equipment diagram rather than assuming its bonding role.","An accessible common point is not automatically a protective-earth terminal."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify that connection in the actual winding and equipment diagram rather than assuming its bonding role.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"An accessible common point is not automatically a protective-earth terminal.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q060203 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Identify that connection in the actual winding and equipment diagram rather than assuming its bonding role."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-four-phase-winding-with-accessible-connection","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Four-phase winding with accessible connection","reference":"Autodesk IEC-60617 Symbol Preview — Winding connection and supply-character qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-four-phase-winding-with-accessible-connection","illustration":"https://eloragrid.ai/library/illustrations/iec-four-phase-winding-with-accessible-connection.svg"},{"slug":"iec-three-phase-t-winding-connection","name":"Three-phase T winding connection","kind":"symbol","abbreviation":"Q060204","aliases":["Three-phase T winding connection symbol","Q060204","Three-phase T winding connection IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A T winding qualifier identifies the publisher's three-phase T connection form.","description":["A T winding qualifier identifies the publisher's three-phase T connection form.","State the winding relationships and terminals in the equipment documentation.","The T-form indication does not establish a complete transformer ratio or vector group."],"readingNotes":["State the winding relationships and terminals in the equipment documentation.","The T-form indication does not establish a complete transformer ratio or vector group."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the winding relationships and terminals in the equipment documentation.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The T-form indication does not establish a complete transformer ratio or vector group.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q060204 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the winding relationships and terminals in the equipment documentation."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-three-phase-t-winding-connection","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Three-phase T winding connection","reference":"Autodesk IEC-60617 Symbol Preview — Winding connection and supply-character qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-three-phase-t-winding-connection","illustration":"https://eloragrid.ai/library/illustrations/iec-three-phase-t-winding-connection.svg"},{"slug":"iec-six-phase-double-delta-winding-connection","name":"Six-phase double-delta winding connection","kind":"symbol","abbreviation":"Q060210","aliases":["Six-phase double-delta winding connection symbol","Q060210","Six-phase double-delta winding connection IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies a six-phase winding arrangement using the publisher's double-delta form.","description":["This qualifier identifies a six-phase winding arrangement using the publisher's double-delta form.","Record all phase terminals and the associated conversion or machine application.","Six-phase winding topology is different from two unrelated three-phase loads."],"readingNotes":["Record all phase terminals and the associated conversion or machine application.","Six-phase winding topology is different from two unrelated three-phase loads."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Record all phase terminals and the associated conversion or machine application.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Six-phase winding topology is different from two unrelated three-phase loads.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q060210 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Record all phase terminals and the associated conversion or machine application."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-six-phase-double-delta-winding-connection","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Six-phase double-delta winding connection","reference":"Autodesk IEC-60617 Symbol Preview — Winding connection and supply-character qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-six-phase-double-delta-winding-connection","illustration":"https://eloragrid.ai/library/illustrations/iec-six-phase-double-delta-winding-connection.svg"},{"slug":"iec-six-phase-polygon-winding-connection","name":"Six-phase polygon winding connection","kind":"symbol","abbreviation":"Q060211","aliases":["Six-phase polygon winding connection symbol","Q060211","Six-phase polygon winding connection IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A polygon winding qualifier identifies the publisher's six-phase polygon connection.","description":["A polygon winding qualifier identifies the publisher's six-phase polygon connection.","Use the manufacturer's winding diagram to establish terminal sequence and interconnections.","The polygon outline is a connection concept, not a physical arrangement of coils."],"readingNotes":["Use the manufacturer's winding diagram to establish terminal sequence and interconnections.","The polygon outline is a connection concept, not a physical arrangement of coils."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Use the manufacturer's winding diagram to establish terminal sequence and interconnections.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The polygon outline is a connection concept, not a physical arrangement of coils.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q060211 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Use the manufacturer's winding diagram to establish terminal sequence and interconnections."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-six-phase-polygon-winding-connection","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Six-phase polygon winding connection","reference":"Autodesk IEC-60617 Symbol Preview — Winding connection and supply-character qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-six-phase-polygon-winding-connection","illustration":"https://eloragrid.ai/library/illustrations/iec-six-phase-polygon-winding-connection.svg"},{"slug":"iec-six-phase-star-winding-connection","name":"Six-phase star winding connection","kind":"symbol","abbreviation":"Q060212","aliases":["Six-phase star winding connection symbol","Q060212","Six-phase star winding connection IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies a six-phase winding connected at a common star point.","description":["This qualifier identifies a six-phase winding connected at a common star point.","Document the phase terminals and whether the common point is accessible.","A six-phase star connection cannot be reduced to an ordinary three-phase star label."],"readingNotes":["Document the phase terminals and whether the common point is accessible.","A six-phase star connection cannot be reduced to an ordinary three-phase star label."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document the phase terminals and whether the common point is accessible.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A six-phase star connection cannot be reduced to an ordinary three-phase star label.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q060212 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document the phase terminals and whether the common point is accessible."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-six-phase-star-winding-connection","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Six-phase star winding connection","reference":"Autodesk IEC-60617 Symbol Preview — Winding connection and supply-character qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-six-phase-star-winding-connection","illustration":"https://eloragrid.ai/library/illustrations/iec-six-phase-star-winding-connection.svg"},{"slug":"iec-six-phase-double-zigzag-winding-connection","name":"Six-phase double-zigzag winding connection","kind":"symbol","abbreviation":"Q060213","aliases":["Six-phase double-zigzag winding connection symbol","Q060213","Six-phase double-zigzag winding connection IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies the publisher's six-phase double-zigzag form with an accessible connection.","description":["This qualifier identifies the publisher's six-phase double-zigzag form with an accessible connection.","Record the winding sections and common terminal using the actual equipment diagram.","A zigzag connection qualifier does not specify winding turns or grounding duty."],"readingNotes":["Record the winding sections and common terminal using the actual equipment diagram.","A zigzag connection qualifier does not specify winding turns or grounding duty."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Record the winding sections and common terminal using the actual equipment diagram.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A zigzag connection qualifier does not specify winding turns or grounding duty.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q060213 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Record the winding sections and common terminal using the actual equipment diagram."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-six-phase-double-zigzag-winding-connection","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Six-phase double-zigzag winding connection","reference":"Autodesk IEC-60617 Symbol Preview — Winding connection and supply-character qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-six-phase-double-zigzag-winding-connection","illustration":"https://eloragrid.ai/library/illustrations/iec-six-phase-double-zigzag-winding-connection.svg"},{"slug":"iec-direct-current-supply-qualifier","name":"Direct-current supply qualifier","kind":"symbol","abbreviation":"Q020201","aliases":["Direct-current supply qualifier symbol","Q020201, Q020203","Direct-current supply qualifier IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A direct-current qualifier identifies the supply character associated with a circuit or device.","description":["A direct-current qualifier identifies the supply character associated with a circuit or device.","Show voltage, polarity and circuit reference separately.","A DC indication does not establish whether the source is a battery, rectifier or converter."],"readingNotes":["Show voltage, polarity and circuit reference separately.","A DC indication does not establish whether the source is a battery, rectifier or converter."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show voltage, polarity and circuit reference separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A DC indication does not establish whether the source is a battery, rectifier or converter.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020201, Q020203 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Show voltage, polarity and circuit reference separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-direct-current-supply-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Direct-current supply qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Winding connection and supply-character qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-direct-current-supply-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-direct-current-supply-qualifier.svg"},{"slug":"iec-alternating-current-supply-qualifier","name":"Alternating-current supply qualifier","kind":"symbol","abbreviation":"Q020204","aliases":["Alternating-current supply qualifier symbol","Q020204","Alternating-current supply qualifier IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An alternating-current qualifier identifies the supply character of a represented circuit.","description":["An alternating-current qualifier identifies the supply character of a represented circuit.","Record frequency, phase count and voltage where required.","An AC qualifier alone does not identify the number of phases."],"readingNotes":["Record frequency, phase count and voltage where required.","An AC qualifier alone does not identify the number of phases."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Record frequency, phase count and voltage where required.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"An AC qualifier alone does not identify the number of phases.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020204 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Record frequency, phase count and voltage where required."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-alternating-current-supply-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Alternating-current supply qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Winding connection and supply-character qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-alternating-current-supply-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-alternating-current-supply-qualifier.svg"},{"slug":"iec-rectified-current-with-ac-component-qualifier","name":"Rectified-current with AC component qualifier","kind":"symbol","abbreviation":"Q020212","aliases":["Rectified-current with AC component qualifier symbol","Q020212","Rectified-current with AC component qualifier IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier distinguishes rectified current with a remaining alternating component.","description":["This qualifier distinguishes rectified current with a remaining alternating component.","State the converter/source arrangement and relevant waveform information separately.","Rectified output should not automatically be treated as ripple-free DC."],"readingNotes":["State the converter/source arrangement and relevant waveform information separately.","Rectified output should not automatically be treated as ripple-free DC."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the converter/source arrangement and relevant waveform information separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Rectified output should not automatically be treated as ripple-free DC.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q020212 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the converter/source arrangement and relevant waveform information separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-windings","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-rectified-current-with-ac-component-qualifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Rectified-current with AC component qualifier","reference":"Autodesk IEC-60617 Symbol Preview — Winding connection and supply-character qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-rectified-current-with-ac-component-qualifier","illustration":"https://eloragrid.ai/library/illustrations/iec-rectified-current-with-ac-component-qualifier.svg"},{"slug":"iec-automatic-mechanical-return-indication","name":"Automatic mechanical-return indication","kind":"symbol","abbreviation":"Q021207","aliases":["Automatic mechanical-return indication symbol","Q021207","Automatic mechanical-return indication IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This indication identifies the automatic return behaviour of a mechanical control relationship.","description":["This indication identifies the automatic return behaviour of a mechanical control relationship.","Show the rest position and the force or condition removed to allow return.","Mechanical return behaviour is separate from electrical contact normal state."],"readingNotes":["Show the rest position and the force or condition removed to allow return.","Mechanical return behaviour is separate from electrical contact normal state."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show the rest position and the force or condition removed to allow return.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Mechanical return behaviour is separate from electrical contact normal state.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021207 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Show the rest position and the force or condition removed to allow return."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-mechanical","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-automatic-mechanical-return-indication","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Automatic mechanical-return indication","reference":"Autodesk IEC-60617 Symbol Preview — Mechanical return and interlock qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-automatic-mechanical-return-indication","illustration":"https://eloragrid.ai/library/illustrations/iec-automatic-mechanical-return-indication.svg"},{"slug":"iec-mechanical-stop-latch-indication","name":"Mechanical stop-latch indication","kind":"symbol","abbreviation":"Q021208","aliases":["Mechanical stop-latch indication symbol","Q021208","Mechanical stop-latch indication IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A stop-latch indication identifies a mechanically retained control position.","description":["A stop-latch indication identifies a mechanically retained control position. A stop latch mechanically retains a position until its specified release action occurs. The mechanism state can be maintained without an electrical holding coil remaining energised.","Identify the retained movement and the release/reset path. If position is reported electrically, cross-reference the feedback contact rather than assuming the latch indication supplies that signal."],"readingNotes":["Specify the release action and the controlled device relationship.","A stop latch is distinct from a timer holding a circuit electrically."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Specify the release action and the controlled device relationship.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A stop latch is distinct from a timer holding a circuit electrically.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021208 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Specify the release action and the controlled device relationship."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-mechanical","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-mechanical-stop-latch-indication","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Mechanical stop-latch indication","reference":"Autodesk IEC-60617 Symbol Preview — Mechanical return and interlock qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-mechanical-stop-latch-indication","illustration":"https://eloragrid.ai/library/illustrations/iec-mechanical-stop-latch-indication.svg"},{"slug":"iec-mechanical-stop-latch-in-neutral-state","name":"Mechanical stop latch in neutral state","kind":"symbol","abbreviation":"Q021209","aliases":["Mechanical stop latch in neutral state symbol","Q021209","Mechanical stop latch in neutral state IEC reference","Q021213"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form identifies the neutral state of the represented stop-latch mechanism.","description":["This form identifies the neutral state of the represented stop-latch mechanism. Neutral describes the represented retaining mechanism, not every electrical contact belonging to the assembly. A state table provides the relationship between latch condition and contact states.","Identify the associated mechanism and define the neutral condition in its operating sequence. Use separate contact and position references when those interfaces appear elsewhere in the schematic."],"readingNotes":["Keep neutral and engaged states explicit in state or sequence documentation.","Neutral is a mechanism state, not an assertion that every contact is open."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Keep neutral and engaged states explicit in state or sequence documentation.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Neutral is a mechanism state, not an assertion that every contact is open.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021209, Q021213 (Autodesk tokens; not verified IEC database IDs)"},{"label":"Information added","value":"Keep neutral and engaged states explicit in state or sequence documentation."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-mechanical","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."},{"sourceId":"iec-public-latch","relevance":"Public alternate engaged/neutral latching-device tokens are consolidated with the matching mechanical state concept."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-mechanical-stop-latch-in-neutral-state","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Mechanical stop latch in neutral state","reference":"Autodesk IEC-60617 Symbol Preview — Mechanical return and interlock qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-mechanical-stop-latch-in-neutral-state","illustration":"https://eloragrid.ai/library/illustrations/iec-mechanical-stop-latch-in-neutral-state.svg"},{"slug":"iec-mechanical-stop-latch-in-engaged-state","name":"Mechanical stop latch in engaged state","kind":"symbol","abbreviation":"Q021210","aliases":["Mechanical stop latch in engaged state symbol","Q021210","Mechanical stop latch in engaged state IEC reference","Q021212"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form identifies an engaged stop-latch mechanism.","description":["This form identifies an engaged stop-latch mechanism. The state describes mechanical retention. The affected device can have separate electrical contacts reporting that position, so engagement is not equivalent to energisation.","State which movement is restrained and what documented release action changes the condition. Where feedback is used, cross-reference its actual contact rather than treating the latch mark as an electrical output."],"readingNotes":["State which movement is restrained and what releases the latch.","An engaged latch does not automatically indicate a circuit is energised."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State which movement is restrained and what releases the latch.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"An engaged latch does not automatically indicate a circuit is energised.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021210, Q021212 (Autodesk tokens; not verified IEC database IDs)"},{"label":"Information added","value":"State which movement is restrained and what releases the latch."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-mechanical","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."},{"sourceId":"iec-public-latch","relevance":"Public alternate engaged/neutral latching-device tokens are consolidated with the matching mechanical state concept."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-mechanical-stop-latch-in-engaged-state","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Mechanical stop latch in engaged state","reference":"Autodesk IEC-60617 Symbol Preview — Mechanical return and interlock qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-mechanical-stop-latch-in-engaged-state","illustration":"https://eloragrid.ai/library/illustrations/iec-mechanical-stop-latch-in-engaged-state.svg"},{"slug":"iec-mechanical-interlock-between-devices","name":"Mechanical interlock between devices","kind":"symbol","abbreviation":"Q021211","aliases":["Mechanical interlock between devices symbol","Q021211","Mechanical interlock between devices IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A mechanical interlock indication links devices whose movements are constrained by a physical relationship.","description":["A mechanical interlock indication links devices whose movements are constrained by a physical relationship. A physical interlock constrains the movements of two associated mechanisms. It remains a mechanical relationship even when the electrical circuit also contains permissive contacts.","Use both device tags and the intended exclusive positions to make the relationship readable. Draw any electrical feedback or auxiliary interlock contact separately, since it represents another interface."],"readingNotes":["Identify both devices and the prohibited simultaneous condition.","Mechanical interlocking differs from an electrical interlock contact or software permissive."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify both devices and the prohibited simultaneous condition.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Mechanical interlocking differs from an electrical interlock contact or software permissive.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021211 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Identify both devices and the prohibited simultaneous condition."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-mechanical","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-mechanical-interlock-between-devices","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Mechanical interlock between devices","reference":"Autodesk IEC-60617 Symbol Preview — Mechanical return and interlock qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-mechanical-interlock-between-devices","illustration":"https://eloragrid.ai/library/illustrations/iec-mechanical-interlock-between-devices.svg"},{"slug":"iec-two-way-latching-device","name":"Two-way latching device","kind":"symbol","abbreviation":"Q1020603","aliases":["Two-way latching device symbol","Q1020603","Two-way latching device IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form identifies the publisher's two-way latching-device arrangement.","description":["This form identifies the publisher's two-way latching-device arrangement. A two-way latch represents retention associated with more than one movement or position relationship. The electrical contacts operated by that mechanism can still have their own independent state table.","Document the positions that are retained and how the mechanism changes between them. Device tagging connects the latch representation to the operated contacts or actuator."],"readingNotes":["Document the positions retained by the latch and the changeover action.","Two-way retention does not imply a two-way electrical contact arrangement."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document the positions retained by the latch and the changeover action.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Two-way retention does not imply a two-way electrical contact arrangement.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q1020603 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document the positions retained by the latch and the changeover action."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-latch","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-two-way-latching-device","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Two-way latching device","reference":"Autodesk IEC-60617 Symbol Preview — Latching-device qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-two-way-latching-device","illustration":"https://eloragrid.ai/library/illustrations/iec-two-way-latching-device.svg"},{"slug":"iec-manually-released-latching-device","name":"Manually released latching device","kind":"symbol","abbreviation":"Q1020604","aliases":["Manually released latching device symbol","Q1020604","Manually released latching device IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This qualifier identifies release of a latching mechanism by manual action.","description":["This qualifier identifies release of a latching mechanism by manual action. The retained mechanism is released through a documented manual action. Resetting the mechanism and removing electrical supply can be different events.","Show the manual release and the resulting position relationship. Where the latch also reports status, identify that feedback as a separate contact or sensor interface."],"readingNotes":["Show the reset or release device and the resulting rest condition.","Manual unlatching differs from de-energising an ordinary relay coil."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show the reset or release device and the resulting rest condition.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Manual unlatching differs from de-energising an ordinary relay coil.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q1020604 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Show the reset or release device and the resulting rest condition."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-latch","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-manually-released-latching-device","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Manually released latching device","reference":"Autodesk IEC-60617 Symbol Preview — Latching-device qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-manually-released-latching-device","illustration":"https://eloragrid.ai/library/illustrations/iec-manually-released-latching-device.svg"},{"slug":"iec-key-controlled-two-way-latching-device","name":"Key-controlled two-way latching device","kind":"symbol","abbreviation":"Q1029603","aliases":["Key-controlled two-way latching device symbol","Q1029603","Key-controlled two-way latching device IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form identifies a two-way latch using a documented key operation.","description":["This form identifies a two-way latch using a documented key operation. A key controls the movement or release of the two-way latching arrangement. Its role is mechanical access/operation, while the associated electrical circuit retains its own contact logic.","Keep key identifiers and device tags consistent with the interlocking schedule. A single keyed-latch graphic cannot describe all exchanges in a multi-key sequence."],"readingNotes":["Cross-reference the key arrangement and retained mechanism positions.","A keyed latch does not establish a complete trapped-key sequence by itself."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Cross-reference the key arrangement and retained mechanism positions.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A keyed latch does not establish a complete trapped-key sequence by itself.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q1029603 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Cross-reference the key arrangement and retained mechanism positions."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-latch","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-key-controlled-two-way-latching-device","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Key-controlled two-way latching device","reference":"Autodesk IEC-60617 Symbol Preview — Latching-device qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-key-controlled-two-way-latching-device","illustration":"https://eloragrid.ai/library/illustrations/iec-key-controlled-two-way-latching-device.svg"},{"slug":"iec-mechanical-clutch-connection","name":"Mechanical clutch connection","kind":"symbol","abbreviation":"Q021216","aliases":["Mechanical clutch connection symbol","Q021216","Mechanical clutch connection IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A clutch qualifier identifies a selectively coupled mechanical relationship.","description":["A clutch qualifier identifies a selectively coupled mechanical relationship. A clutch provides a selectable mechanical relationship between driving and driven elements. Its engaged and disengaged conditions can influence movement without interrupting an electrical supply.","Name the two coupled elements and cross-reference the actuation and position feedback. Mechanical coupling does not imply that the elements share one electrical circuit."],"readingNotes":["Name the driving and driven elements and the coupling control.","Mechanical engagement does not mean electrical continuity between the elements."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Name the driving and driven elements and the coupling control.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Mechanical engagement does not mean electrical continuity between the elements.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021216 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Name the driving and driven elements and the coupling control."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-coupling","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-mechanical-clutch-connection","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Mechanical clutch connection","reference":"Autodesk IEC-60617 Symbol Preview — Mechanical coupling qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-mechanical-clutch-connection","illustration":"https://eloragrid.ai/library/illustrations/iec-mechanical-clutch-connection.svg"},{"slug":"iec-disconnected-mechanical-coupling","name":"Disconnected mechanical coupling","kind":"symbol","abbreviation":"Q021217","aliases":["Disconnected mechanical coupling symbol","Q021217","Disconnected mechanical coupling IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This indication identifies the disconnected state of a mechanical coupling.","description":["This indication identifies the disconnected state of a mechanical coupling. The driving and driven elements are represented without an engaged torque or motion-transmission relationship in this state. Either element can still have electrical connections.","Use the state diagram or mechanism schedule to define what causes engagement. The disconnected coupling mark should not be substituted for a power isolation symbol."],"readingNotes":["Read the state within the documented mechanism sequence.","A disconnected coupling state is separate from the isolation of an electrical supply."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Read the state within the documented mechanism sequence.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A disconnected coupling state is separate from the isolation of an electrical supply.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021217 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Read the state within the documented mechanism sequence."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-coupling","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-disconnected-mechanical-coupling","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Disconnected mechanical coupling","reference":"Autodesk IEC-60617 Symbol Preview — Mechanical coupling qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-disconnected-mechanical-coupling","illustration":"https://eloragrid.ai/library/illustrations/iec-disconnected-mechanical-coupling.svg"},{"slug":"iec-engaged-mechanical-coupling","name":"Engaged mechanical coupling","kind":"symbol","abbreviation":"Q021218","aliases":["Engaged mechanical coupling symbol","Q021218, Q021219","Engaged mechanical coupling IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This indication identifies engagement between the represented mechanical elements.","description":["This indication identifies engagement between the represented mechanical elements. The represented elements share the documented motion-transmission relationship in the engaged state. That state says nothing by itself about supply energisation or electrical contact position.","Show the driving/driven device identities and connect the engagement state to its actual feedback if used. Alternate publisher graphical forms are retained within this one concept."],"readingNotes":["Document the elements coupled and the applicable state condition.","Different published graphical forms for the same engagement are kept in one concept record."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document the elements coupled and the applicable state condition.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Different published graphical forms for the same engagement are kept in one concept record.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021218, Q021219 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document the elements coupled and the applicable state condition."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-coupling","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-engaged-mechanical-coupling","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Engaged mechanical coupling","reference":"Autodesk IEC-60617 Symbol Preview — Mechanical coupling qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-engaged-mechanical-coupling","illustration":"https://eloragrid.ai/library/illustrations/iec-engaged-mechanical-coupling.svg"},{"slug":"iec-mechanical-gear-connection","name":"Mechanical gear connection","kind":"symbol","abbreviation":"Q021223","aliases":["Mechanical gear connection symbol","Q021223","Mechanical gear connection IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A gear-connection indication identifies transmission through a gearing relationship.","description":["A gear-connection indication identifies transmission through a gearing relationship. A gear relationship transfers motion through the documented gearing arrangement. It can relate an operating member to a switch, position device or driven mechanism.","The schematic identifies the relationship while a mechanical drawing supplies ratio and geometry. Avoid treating the gear connection mark as a numerical reduction ratio."],"readingNotes":["State the driving/driven mechanism and any required ratio in the schedule.","The symbol does not give a gear ratio, tooth geometry or mechanical rating."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the driving/driven mechanism and any required ratio in the schedule.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The symbol does not give a gear ratio, tooth geometry or mechanical rating.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"Q021223 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the driving/driven mechanism and any required ratio in the schedule."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-coupling","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-mechanical-gear-connection","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Mechanical gear connection","reference":"Autodesk IEC-60617 Symbol Preview — Mechanical coupling qualifiers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-mechanical-gear-connection","illustration":"https://eloragrid.ai/library/illustrations/iec-mechanical-gear-connection.svg"},{"slug":"iec-thermocouple-with-terminal-board","name":"Thermocouple with terminal board","kind":"symbol","abbreviation":"HTC1LTB","aliases":["Thermocouple with terminal board symbol","HTC1LTB, HTC1RTB","Thermocouple with terminal board IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation distinguishes a thermocouple circuit expanded to show its terminal-board interface.","description":["This representation distinguishes a thermocouple circuit expanded to show its terminal-board interface.","Coordinate thermocouple polarity, terminal identity and the specified extension/compensating conductors.","Adding a terminal board does not make a thermocouple circuit an ordinary copper voltage circuit."],"readingNotes":["Coordinate thermocouple polarity, terminal identity and the specified extension/compensating conductors.","Adding a terminal board does not make a thermocouple circuit an ordinary copper voltage circuit."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Coordinate thermocouple polarity, terminal identity and the specified extension/compensating conductors.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Adding a terminal board does not make a thermocouple circuit an ordinary copper voltage circuit.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HTC1LTB, HTC1RTB (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Coordinate thermocouple polarity, terminal identity and the specified extension/compensating conductors."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-thermocouple-with-terminal-board","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Thermocouple with terminal board","reference":"Autodesk IEC-60617 Symbol Preview — Instrumentation and sensor family reference; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-thermocouple-with-terminal-board","illustration":"https://eloragrid.ai/library/illustrations/iec-thermocouple-with-terminal-board.svg"},{"slug":"iec-pyrometer-indication","name":"Pyrometer indication","kind":"symbol","abbreviation":"HIN1P25","aliases":["Pyrometer indication symbol","HIN1P25","Pyrometer indication IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A pyrometer indication identifies the documented temperature-measurement display function.","description":["A pyrometer indication identifies the documented temperature-measurement display function.","Reference the sensing method, range and input interface separately.","A temperature display symbol does not determine whether the measurement uses contact or non-contact sensing."],"readingNotes":["Reference the sensing method, range and input interface separately.","A temperature display symbol does not determine whether the measurement uses contact or non-contact sensing."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Reference the sensing method, range and input interface separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A temperature display symbol does not determine whether the measurement uses contact or non-contact sensing.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HIN1P25 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Reference the sensing method, range and input interface separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-pyrometer-indication","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Pyrometer indication","reference":"Autodesk IEC-60617 Symbol Preview — Instrumentation and sensor family reference; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-pyrometer-indication","illustration":"https://eloragrid.ai/library/illustrations/iec-pyrometer-indication.svg"},{"slug":"iec-clock-indication","name":"Clock indication","kind":"symbol","abbreviation":"HIN1P29","aliases":["Clock indication symbol","HIN1P29","Clock indication IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A clock indication identifies a time display or clock function in the circuit documentation.","description":["A clock indication identifies a time display or clock function in the circuit documentation.","State the clock's role, supply and any associated outputs.","A clock display and an elapsed-hours meter measure different time relationships."],"readingNotes":["State the clock's role, supply and any associated outputs.","A clock display and an elapsed-hours meter measure different time relationships."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the clock's role, supply and any associated outputs.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A clock display and an elapsed-hours meter measure different time relationships.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HIN1P29 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the clock's role, supply and any associated outputs."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-clock-indication","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Clock indication","reference":"Autodesk IEC-60617 Symbol Preview — Instrumentation and sensor family reference; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-clock-indication","illustration":"https://eloragrid.ai/library/illustrations/iec-clock-indication.svg"},{"slug":"iec-minute-pulse-clock-contact","name":"Minute-pulse clock contact","kind":"symbol","abbreviation":"HIN1P33","aliases":["Minute-pulse clock contact symbol","HIN1P33","Minute-pulse clock contact IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies the publisher's normally-open clock contact that closes every minute.","description":["This representation identifies the publisher's normally-open clock contact that closes every minute.","Document the pulse purpose and downstream circuit response.","A periodic clock contact is distinct from an on-delay or off-delay timer."],"readingNotes":["Document the pulse purpose and downstream circuit response.","A periodic clock contact is distinct from an on-delay or off-delay timer."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document the pulse purpose and downstream circuit response.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A periodic clock contact is distinct from an on-delay or off-delay timer.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HIN1P33 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document the pulse purpose and downstream circuit response."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-minute-pulse-clock-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Minute-pulse clock contact","reference":"Autodesk IEC-60617 Symbol Preview — Instrumentation and sensor family reference; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-minute-pulse-clock-contact","illustration":"https://eloragrid.ai/library/illustrations/iec-minute-pulse-clock-contact.svg"},{"slug":"iec-pressure-to-current-converter","name":"Pressure-to-current converter","kind":"symbol","abbreviation":"HIN1B10","aliases":["Pressure-to-current converter symbol","HIN1B10","Pressure-to-current converter IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies conversion of a pressure input to a current-signal output.","description":["This representation identifies conversion of a pressure input to a current-signal output.","Document process connection, signal range and auxiliary supply separately.","The symbol does not establish a particular 4–20 mA range or calibration."],"readingNotes":["Document process connection, signal range and auxiliary supply separately.","The symbol does not establish a particular 4–20 mA range or calibration."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document process connection, signal range and auxiliary supply separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The symbol does not establish a particular 4–20 mA range or calibration.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HIN1B10 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document process connection, signal range and auxiliary supply separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-pressure-to-current-converter","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Pressure-to-current converter","reference":"Autodesk IEC-60617 Symbol Preview — Instrumentation and sensor family reference; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-pressure-to-current-converter","illustration":"https://eloragrid.ai/library/illustrations/iec-pressure-to-current-converter.svg"},{"slug":"iec-single-phase-ac-to-dc-current-converter","name":"Single-phase AC-to-DC current converter","kind":"symbol","abbreviation":"HIN1G1","aliases":["Single-phase AC-to-DC current converter symbol","HIN1G1","Single-phase AC-to-DC current converter IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies the publisher's single-phase AC/DC current-conversion function.","description":["This representation identifies the publisher's single-phase AC/DC current-conversion function.","Identify the measured/input circuit and the resulting output signal in the schedule.","An instrumentation converter is not automatically a power rectifier supplying a load."],"readingNotes":["Identify the measured/input circuit and the resulting output signal in the schedule.","An instrumentation converter is not automatically a power rectifier supplying a load."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify the measured/input circuit and the resulting output signal in the schedule.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"An instrumentation converter is not automatically a power rectifier supplying a load.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HIN1G1 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Identify the measured/input circuit and the resulting output signal in the schedule."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-single-phase-ac-to-dc-current-converter","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Single-phase AC-to-DC current converter","reference":"Autodesk IEC-60617 Symbol Preview — Instrumentation and sensor family reference; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-single-phase-ac-to-dc-current-converter","illustration":"https://eloragrid.ai/library/illustrations/iec-single-phase-ac-to-dc-current-converter.svg"},{"slug":"iec-tachometric-dynamo","name":"Tachometric dynamo","kind":"symbol","abbreviation":"HIN1B11","aliases":["Tachometric dynamo symbol","HIN1B11","Tachometric dynamo IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A tachometric dynamo indication identifies a speed-related generating measurement function.","description":["A tachometric dynamo indication identifies a speed-related generating measurement function.","Document shaft relationship, output signal and instrument interface.","A speed-measurement generator differs from a power-generating machine."],"readingNotes":["Document shaft relationship, output signal and instrument interface.","A speed-measurement generator differs from a power-generating machine."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document shaft relationship, output signal and instrument interface.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A speed-measurement generator differs from a power-generating machine.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HIN1B11 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document shaft relationship, output signal and instrument interface."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-tachometric-dynamo","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Tachometric dynamo","reference":"Autodesk IEC-60617 Symbol Preview — Instrumentation and sensor family reference; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-tachometric-dynamo","illustration":"https://eloragrid.ai/library/illustrations/iec-tachometric-dynamo.svg"},{"slug":"iec-impulse-tachometric-transducer","name":"Impulse tachometric transducer","kind":"symbol","abbreviation":"HIN1B12","aliases":["Impulse tachometric transducer symbol","HIN1B12","Impulse tachometric transducer IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation distinguishes an impulse-output speed-measurement function.","description":["This representation distinguishes an impulse-output speed-measurement function.","Record pulse relationship, input conditioning and the receiving device.","A pulse output must not be treated as a continuous analogue speed voltage."],"readingNotes":["Record pulse relationship, input conditioning and the receiving device.","A pulse output must not be treated as a continuous analogue speed voltage."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Record pulse relationship, input conditioning and the receiving device.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A pulse output must not be treated as a continuous analogue speed voltage.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HIN1B12 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Record pulse relationship, input conditioning and the receiving device."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-impulse-tachometric-transducer","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Impulse tachometric transducer","reference":"Autodesk IEC-60617 Symbol Preview — Instrumentation and sensor family reference; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-impulse-tachometric-transducer","illustration":"https://eloragrid.ai/library/illustrations/iec-impulse-tachometric-transducer.svg"},{"slug":"iec-optical-tachometric-transducer","name":"Optical tachometric transducer","kind":"symbol","abbreviation":"HIN1B13","aliases":["Optical tachometric transducer symbol","HIN1B13","Optical tachometric transducer IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies optical speed-sensing in the publisher's tachometric family.","description":["This representation identifies optical speed-sensing in the publisher's tachometric family.","Show the optical sensing relationship and output interface separately.","An optical speed sensor is distinct from a generic photoelectric presence switch."],"readingNotes":["Show the optical sensing relationship and output interface separately.","An optical speed sensor is distinct from a generic photoelectric presence switch."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show the optical sensing relationship and output interface separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"An optical speed sensor is distinct from a generic photoelectric presence switch.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HIN1B13 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Show the optical sensing relationship and output interface separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-instrumentation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-optical-tachometric-transducer","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Optical tachometric transducer","reference":"Autodesk IEC-60617 Symbol Preview — Instrumentation and sensor family reference; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-optical-tachometric-transducer","illustration":"https://eloragrid.ai/library/illustrations/iec-optical-tachometric-transducer.svg"},{"slug":"iec-audible-bell","name":"Audible bell","kind":"symbol","abbreviation":"HAN1B","aliases":["Audible bell symbol","HAN1B","Audible bell IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A bell indication identifies an audible annunciation output in a control circuit.","description":["A bell indication identifies an audible annunciation output in a control circuit.","Label the alarm purpose, supply and control contact.","A bell symbol does not establish sound level or alarm priority."],"readingNotes":["Label the alarm purpose, supply and control contact.","A bell symbol does not establish sound level or alarm priority."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Label the alarm purpose, supply and control contact.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A bell symbol does not establish sound level or alarm priority.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HAN1B (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Label the alarm purpose, supply and control contact."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-earthing-surge","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-audible-bell","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Audible bell","reference":"Autodesk IEC-60617 Symbol Preview — Audible indication and protective component forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-audible-bell","illustration":"https://eloragrid.ai/library/illustrations/iec-audible-bell.svg"},{"slug":"iec-audible-buzzer","name":"Audible buzzer","kind":"symbol","abbreviation":"HAN1Z","aliases":["Audible buzzer symbol","HAN1Z","Audible buzzer IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A buzzer indication identifies the specified audible signalling output.","description":["A buzzer indication identifies the specified audible signalling output.","Document its energising condition and any acknowledge or silence circuit.","A buzzer and a beacon provide different indication channels."],"readingNotes":["Document its energising condition and any acknowledge or silence circuit.","A buzzer and a beacon provide different indication channels."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document its energising condition and any acknowledge or silence circuit.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A buzzer and a beacon provide different indication channels.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HAN1Z (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document its energising condition and any acknowledge or silence circuit."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-earthing-surge","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-audible-buzzer","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Audible buzzer","reference":"Autodesk IEC-60617 Symbol Preview — Audible indication and protective component forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-audible-buzzer","illustration":"https://eloragrid.ai/library/illustrations/iec-audible-buzzer.svg"},{"slug":"iec-audible-siren","name":"Audible siren","kind":"symbol","abbreviation":"HAN1S","aliases":["Audible siren symbol","HAN1S","Audible siren IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A siren indication identifies an audible alarm output with the documented operating role.","description":["A siren indication identifies an audible alarm output with the documented operating role.","State the alarm condition and the controlling circuit.","The symbol alone does not prescribe tone pattern or evacuation meaning."],"readingNotes":["State the alarm condition and the controlling circuit.","The symbol alone does not prescribe tone pattern or evacuation meaning."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the alarm condition and the controlling circuit.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The symbol alone does not prescribe tone pattern or evacuation meaning.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HAN1S (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the alarm condition and the controlling circuit."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-earthing-surge","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-audible-siren","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Audible siren","reference":"Autodesk IEC-60617 Symbol Preview — Audible indication and protective component forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-audible-siren","illustration":"https://eloragrid.ai/library/illustrations/iec-audible-siren.svg"},{"slug":"iec-loudspeaker-annunciation","name":"Loudspeaker annunciation","kind":"symbol","abbreviation":"HAN1B7","aliases":["Loudspeaker annunciation symbol","HAN1B7","Loudspeaker annunciation IEC reference"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A loudspeaker indication identifies conversion of an electrical signal to an audible output.","description":["A loudspeaker indication identifies conversion of an electrical signal to an audible output.","Label the signal path and amplifier or system connection.","An audio loudspeaker is distinct from a directly energised alarm buzzer."],"readingNotes":["Label the signal path and amplifier or system connection.","An audio loudspeaker is distinct from a directly energised alarm buzzer."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Label the signal path and amplifier or system connection.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"An audio loudspeaker is distinct from a directly energised alarm buzzer.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HAN1B7 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Label the signal path and amplifier or system connection."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-annunciation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","generic-electrical-load"],"artwork":"edu-iec-loudspeaker-annunciation","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Loudspeaker annunciation","reference":"Autodesk IEC-60617 Symbol Preview — Electroacoustic annunciation forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-loudspeaker-annunciation","illustration":"https://eloragrid.ai/library/illustrations/iec-loudspeaker-annunciation.svg"},{"slug":"iec-combined-loudspeaker-and-microphone","name":"Combined loudspeaker and microphone","kind":"symbol","abbreviation":"HAN1B8","aliases":["Combined loudspeaker and microphone symbol","HAN1B8","Combined loudspeaker and microphone IEC reference"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies an electroacoustic device serving loudspeaker and microphone roles.","description":["This representation identifies an electroacoustic device serving loudspeaker and microphone roles.","Show transmit/receive connections and the documented operating modes.","Two acoustic roles do not imply simultaneous two-way operation."],"readingNotes":["Show transmit/receive connections and the documented operating modes.","Two acoustic roles do not imply simultaneous two-way operation."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show transmit/receive connections and the documented operating modes.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Two acoustic roles do not imply simultaneous two-way operation.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HAN1B8 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Show transmit/receive connections and the documented operating modes."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-annunciation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","generic-electrical-load"],"artwork":"edu-iec-combined-loudspeaker-and-microphone","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Combined loudspeaker and microphone","reference":"Autodesk IEC-60617 Symbol Preview — Electroacoustic annunciation forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-combined-loudspeaker-and-microphone","illustration":"https://eloragrid.ai/library/illustrations/iec-combined-loudspeaker-and-microphone.svg"},{"slug":"iec-microphone-input","name":"Microphone input","kind":"symbol","abbreviation":"HAN1B9","aliases":["Microphone input symbol","HAN1B9","Microphone input IEC reference"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A microphone indication identifies an acoustic-input transducer in a communications circuit.","description":["A microphone indication identifies an acoustic-input transducer in a communications circuit.","Reference the signal input, supply or bias arrangement where relevant.","A microphone converts sound into a signal; a loudspeaker performs the opposite role."],"readingNotes":["Reference the signal input, supply or bias arrangement where relevant.","A microphone converts sound into a signal; a loudspeaker performs the opposite role."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Reference the signal input, supply or bias arrangement where relevant.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A microphone converts sound into a signal; a loudspeaker performs the opposite role.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HAN1B9 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Reference the signal input, supply or bias arrangement where relevant."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-annunciation","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","generic-electrical-load"],"artwork":"edu-iec-microphone-input","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Microphone input","reference":"Autodesk IEC-60617 Symbol Preview — Electroacoustic annunciation forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-microphone-input","illustration":"https://eloragrid.ai/library/illustrations/iec-microphone-input.svg"},{"slug":"iec-solenoid-valve-actuator","name":"Solenoid valve actuator","kind":"symbol","abbreviation":"HSV1","aliases":["Solenoid valve actuator symbol","HSV1, HSVC1","Solenoid valve actuator IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies the electrical actuator associated with a solenoid-operated valve.","description":["This representation identifies the electrical actuator associated with a solenoid-operated valve.","Cross-reference the process valve tag and the actuator's electrical terminals.","A solenoid actuator symbol is not a complete fluid-flow valve diagram."],"readingNotes":["Cross-reference the process valve tag and the actuator's electrical terminals.","A solenoid actuator symbol is not a complete fluid-flow valve diagram."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Cross-reference the process valve tag and the actuator's electrical terminals.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A solenoid actuator symbol is not a complete fluid-flow valve diagram.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HSV1, HSVC1 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Cross-reference the process valve tag and the actuator's electrical terminals."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-solenoids","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-solenoid-valve-actuator","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Solenoid valve actuator","reference":"Autodesk IEC-60617 Symbol Preview — Solenoid actuator and feedback forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-solenoid-valve-actuator","illustration":"https://eloragrid.ai/library/illustrations/iec-solenoid-valve-actuator.svg"},{"slug":"iec-solenoid-closing-function-for-an-open-valve","name":"Solenoid closing function for an open valve","kind":"symbol","abbreviation":"HSV1Y1","aliases":["Solenoid closing function for an open valve symbol","HSV1Y1, HSV1Y1A","Solenoid closing function for an open valve IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies the publisher's open-valve closing function associated with solenoid operation.","description":["This representation identifies the publisher's open-valve closing function associated with solenoid operation.","State the process normal condition and what energisation changes.","The wording must be checked against the selected valve; it does not prove a universal fail-open or fail-closed arrangement."],"readingNotes":["State the process normal condition and what energisation changes.","The wording must be checked against the selected valve; it does not prove a universal fail-open or fail-closed arrangement."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the process normal condition and what energisation changes.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The wording must be checked against the selected valve; it does not prove a universal fail-open or fail-closed arrangement.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HSV1Y1, HSV1Y1A (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the process normal condition and what energisation changes."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-solenoids","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-solenoid-closing-function-for-an-open-valve","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Solenoid closing function for an open valve","reference":"Autodesk IEC-60617 Symbol Preview — Solenoid actuator and feedback forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-solenoid-closing-function-for-an-open-valve","illustration":"https://eloragrid.ai/library/illustrations/iec-solenoid-closing-function-for-an-open-valve.svg"},{"slug":"iec-electromagnetic-brake-actuator","name":"Electromagnetic brake actuator","kind":"symbol","abbreviation":"HSV1Y4","aliases":["Electromagnetic brake actuator symbol","HSV1Y4","Electromagnetic brake actuator IEC reference","HSV1Y3"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies an electromagnetic brake actuated through its documented electrical circuit.","description":["This representation identifies an electromagnetic brake actuated through its documented electrical circuit.","Show coil supply, control and any suppression separately.","The symbol does not specify braking torque or release timing."],"readingNotes":["Show coil supply, control and any suppression separately.","The symbol does not specify braking torque or release timing."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show coil supply, control and any suppression separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The symbol does not specify braking torque or release timing.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HSV1Y3, HSV1Y4 (Autodesk tokens; not verified IEC database IDs)"},{"label":"Information added","value":"Show coil supply, control and any suppression separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-solenoids","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-electromagnetic-brake-actuator","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Electromagnetic brake actuator","reference":"Autodesk IEC-60617 Symbol Preview — Solenoid actuator and feedback forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-electromagnetic-brake-actuator","illustration":"https://eloragrid.ai/library/illustrations/iec-electromagnetic-brake-actuator.svg"},{"slug":"iec-solenoid-valve-no-auxiliary-contact","name":"Solenoid-valve NO auxiliary contact","kind":"symbol","abbreviation":"HSV21","aliases":["Solenoid-valve NO auxiliary contact symbol","HSV21","Solenoid-valve NO auxiliary contact IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form identifies a normally-open auxiliary contact associated with a solenoid valve.","description":["This form identifies a normally-open auxiliary contact associated with a solenoid valve.","Cross-reference the actuator or valve tag and state which position the contact reports.","An auxiliary contact is not the power terminal of the solenoid coil."],"readingNotes":["Cross-reference the actuator or valve tag and state which position the contact reports.","An auxiliary contact is not the power terminal of the solenoid coil."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Cross-reference the actuator or valve tag and state which position the contact reports.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"An auxiliary contact is not the power terminal of the solenoid coil.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HSV21 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Cross-reference the actuator or valve tag and state which position the contact reports."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-solenoids","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-solenoid-valve-no-auxiliary-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Solenoid-valve NO auxiliary contact","reference":"Autodesk IEC-60617 Symbol Preview — Solenoid actuator and feedback forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-solenoid-valve-no-auxiliary-contact","illustration":"https://eloragrid.ai/library/illustrations/iec-solenoid-valve-no-auxiliary-contact.svg"},{"slug":"iec-solenoid-valve-nc-auxiliary-contact","name":"Solenoid-valve NC auxiliary contact","kind":"symbol","abbreviation":"HSV22","aliases":["Solenoid-valve NC auxiliary contact symbol","HSV22","Solenoid-valve NC auxiliary contact IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form identifies a normally-closed auxiliary contact associated with a solenoid valve.","description":["This form identifies a normally-closed auxiliary contact associated with a solenoid valve.","State the reference condition used to describe the contact as normally closed.","A contact normal state and the process valve normal state are separate descriptions."],"readingNotes":["State the reference condition used to describe the contact as normally closed.","A contact normal state and the process valve normal state are separate descriptions."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the reference condition used to describe the contact as normally closed.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A contact normal state and the process valve normal state are separate descriptions.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HSV22 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the reference condition used to describe the contact as normally closed."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-solenoids","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-solenoid-valve-nc-auxiliary-contact","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Solenoid-valve NC auxiliary contact","reference":"Autodesk IEC-60617 Symbol Preview — Solenoid actuator and feedback forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-solenoid-valve-nc-auxiliary-contact","illustration":"https://eloragrid.ai/library/illustrations/iec-solenoid-valve-nc-auxiliary-contact.svg"},{"slug":"iec-ultrasonic-proximity-switch","name":"Ultrasonic proximity switch","kind":"symbol","abbreviation":"HPX1U","aliases":["Ultrasonic proximity switch symbol","HPX1U","Ultrasonic proximity switch IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An ultrasonic-switch representation identifies presence or distance switching using an ultrasonic sensing principle.","description":["An ultrasonic-switch representation identifies presence or distance switching using an ultrasonic sensing principle.","State the sensing role, output type and selected device connection separately.","Ultrasonic sensing is distinct from inductive, capacitive and optical sensing."],"readingNotes":["State the sensing role, output type and selected device connection separately.","Ultrasonic sensing is distinct from inductive, capacitive and optical sensing."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the sensing role, output type and selected device connection separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Ultrasonic sensing is distinct from inductive, capacitive and optical sensing.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HPX1U (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the sensing role, output type and selected device connection separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-ultrasonic","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-ultrasonic-proximity-switch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Ultrasonic proximity switch","reference":"Autodesk IEC-60617 Symbol Preview — Ultrasonic switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-ultrasonic-proximity-switch","illustration":"https://eloragrid.ai/library/illustrations/iec-ultrasonic-proximity-switch.svg"},{"slug":"iec-ultrasonic-no-switching-output","name":"Ultrasonic NO switching output","kind":"symbol","abbreviation":"HPX11U","aliases":["Ultrasonic NO switching output symbol","HPX11U","Ultrasonic NO switching output IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form identifies a normally-open switching output in the ultrasonic sensor family.","description":["This form identifies a normally-open switching output in the ultrasonic sensor family.","Read the normal state against the defined target and operating condition.","The form does not provide a sensing distance or electrical output rating."],"readingNotes":["Read the normal state against the defined target and operating condition.","The form does not provide a sensing distance or electrical output rating."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Read the normal state against the defined target and operating condition.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The form does not provide a sensing distance or electrical output rating.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HPX11U (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Read the normal state against the defined target and operating condition."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-ultrasonic","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-ultrasonic-no-switching-output","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Ultrasonic NO switching output","reference":"Autodesk IEC-60617 Symbol Preview — Ultrasonic switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-ultrasonic-no-switching-output","illustration":"https://eloragrid.ai/library/illustrations/iec-ultrasonic-no-switching-output.svg"},{"slug":"iec-ultrasonic-nc-switching-output","name":"Ultrasonic NC switching output","kind":"symbol","abbreviation":"HPX12U","aliases":["Ultrasonic NC switching output symbol","HPX12U","Ultrasonic NC switching output IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form identifies a normally-closed switching output in the ultrasonic sensor family.","description":["This form identifies a normally-closed switching output in the ultrasonic sensor family.","Identify the reference sensing condition and connected control input.","Normally closed does not imply a safety-rated diagnostic output."],"readingNotes":["Identify the reference sensing condition and connected control input.","Normally closed does not imply a safety-rated diagnostic output."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify the reference sensing condition and connected control input.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Normally closed does not imply a safety-rated diagnostic output.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HPX12U (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Identify the reference sensing condition and connected control input."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-ultrasonic","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-ultrasonic-nc-switching-output","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Ultrasonic NC switching output","reference":"Autodesk IEC-60617 Symbol Preview — Ultrasonic switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-ultrasonic-nc-switching-output","illustration":"https://eloragrid.ai/library/illustrations/iec-ultrasonic-nc-switching-output.svg"},{"slug":"iec-three-wire-ultrasonic-sensor","name":"Three-wire ultrasonic sensor","kind":"symbol","abbreviation":"HPX11U3","aliases":["Three-wire ultrasonic sensor symbol","HPX11U3, HPX12U3","Three-wire ultrasonic sensor IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation distinguishes a three-wire ultrasonic sensor interface from a simple contact depiction.","description":["This representation distinguishes a three-wire ultrasonic sensor interface from a simple contact depiction.","Identify supply, return and output from the selected device's terminal diagram.","Three wires do not determine whether the output is sourcing, sinking or a particular voltage."],"readingNotes":["Identify supply, return and output from the selected device's terminal diagram.","Three wires do not determine whether the output is sourcing, sinking or a particular voltage."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify supply, return and output from the selected device's terminal diagram.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Three wires do not determine whether the output is sourcing, sinking or a particular voltage.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HPX11U3, HPX12U3 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Identify supply, return and output from the selected device's terminal diagram."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-ultrasonic","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-three-wire-ultrasonic-sensor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Three-wire ultrasonic sensor","reference":"Autodesk IEC-60617 Symbol Preview — Ultrasonic switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-three-wire-ultrasonic-sensor","illustration":"https://eloragrid.ai/library/illustrations/iec-three-wire-ultrasonic-sensor.svg"},{"slug":"iec-touch-sensitive-switch","name":"Touch-sensitive switch","kind":"symbol","abbreviation":"HPX1TS","aliases":["Touch-sensitive switch symbol","HPX1TS","Touch-sensitive switch IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A touch-switch representation identifies operation by the documented touch-sensing mechanism.","description":["A touch-switch representation identifies operation by the documented touch-sensing mechanism.","State the sensing role and separate power/output interfaces.","Touch operation is distinct from a mechanical pushbutton mechanism."],"readingNotes":["State the sensing role and separate power/output interfaces.","Touch operation is distinct from a mechanical pushbutton mechanism."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the sensing role and separate power/output interfaces.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Touch operation is distinct from a mechanical pushbutton mechanism.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HPX1TS (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the sensing role and separate power/output interfaces."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-touch","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-touch-sensitive-switch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Touch-sensitive switch","reference":"Autodesk IEC-60617 Symbol Preview — Touch-switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-touch-sensitive-switch","illustration":"https://eloragrid.ai/library/illustrations/iec-touch-sensitive-switch.svg"},{"slug":"iec-touch-switch-no-output","name":"Touch-switch NO output","kind":"symbol","abbreviation":"HPX11TS","aliases":["Touch-switch NO output symbol","HPX11TS","Touch-switch NO output IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form identifies a normally-open touch-switch output.","description":["This form identifies a normally-open touch-switch output.","Describe the contact/output reference state and the operating touch condition.","The normal-state label does not identify sensing technology or safety performance."],"readingNotes":["Describe the contact/output reference state and the operating touch condition.","The normal-state label does not identify sensing technology or safety performance."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Describe the contact/output reference state and the operating touch condition.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The normal-state label does not identify sensing technology or safety performance.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HPX11TS (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Describe the contact/output reference state and the operating touch condition."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-touch","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-touch-switch-no-output","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Touch-switch NO output","reference":"Autodesk IEC-60617 Symbol Preview — Touch-switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-touch-switch-no-output","illustration":"https://eloragrid.ai/library/illustrations/iec-touch-switch-no-output.svg"},{"slug":"iec-touch-switch-nc-output","name":"Touch-switch NC output","kind":"symbol","abbreviation":"HPX12TS","aliases":["Touch-switch NC output symbol","HPX12TS","Touch-switch NC output IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form identifies a normally-closed touch-switch output.","description":["This form identifies a normally-closed touch-switch output.","Cross-reference the controlled input and the documented switching condition.","Normally closed touch output is not a mechanical NC pushbutton contact."],"readingNotes":["Cross-reference the controlled input and the documented switching condition.","Normally closed touch output is not a mechanical NC pushbutton contact."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Cross-reference the controlled input and the documented switching condition.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Normally closed touch output is not a mechanical NC pushbutton contact.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HPX12TS (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Cross-reference the controlled input and the documented switching condition."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-touch","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-touch-switch-nc-output","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Touch-switch NC output","reference":"Autodesk IEC-60617 Symbol Preview — Touch-switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-touch-switch-nc-output","illustration":"https://eloragrid.ai/library/illustrations/iec-touch-switch-nc-output.svg"},{"slug":"iec-three-wire-touch-sensitive-switch","name":"Three-wire touch-sensitive switch","kind":"symbol","abbreviation":"HPX11TS3","aliases":["Three-wire touch-sensitive switch symbol","HPX11TS3, HPX12TS3","Three-wire touch-sensitive switch IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation distinguishes a separately supplied three-wire touch-switch interface.","description":["This representation distinguishes a separately supplied three-wire touch-switch interface.","Identify power, return and output using the selected product connection information.","Wire count is not an output-polarity or protocol specification."],"readingNotes":["Identify power, return and output using the selected product connection information.","Wire count is not an output-polarity or protocol specification."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify power, return and output using the selected product connection information.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Wire count is not an output-polarity or protocol specification.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HPX11TS3, HPX12TS3 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Identify power, return and output using the selected product connection information."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-touch","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-three-wire-touch-sensitive-switch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Three-wire touch-sensitive switch","reference":"Autodesk IEC-60617 Symbol Preview — Touch-switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-three-wire-touch-sensitive-switch","illustration":"https://eloragrid.ai/library/illustrations/iec-three-wire-touch-sensitive-switch.svg"},{"slug":"iec-phase-to-phase-voltmeter-selector","name":"Phase-to-phase voltmeter selector","kind":"symbol","abbreviation":"HSW1S90","aliases":["Phase-to-phase voltmeter selector symbol","HSW1S90","Phase-to-phase voltmeter selector IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies selection among phase-to-phase voltage measurement connections.","description":["This representation identifies selection among phase-to-phase voltage measurement connections. The selector connects the meter to the documented line-to-line measurement pairs at its operating positions. It is a measurement interface, not the power switching device of the three-phase circuit.","Provide the actual contact programme and measurement position labels. Identify any instrument-transformer secondary circuits that feed the selector."],"readingNotes":["Document the selector position table and the meter connection.","A measurement selector must not be mistaken for a three-phase power isolator."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document the selector position table and the meter connection.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A measurement selector must not be mistaken for a three-phase power isolator.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HSW1S90 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document the selector position table and the meter connection."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-phase-to-phase-voltmeter-selector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Phase-to-phase voltmeter selector","reference":"Autodesk IEC-60617 Symbol Preview — Measurement-selection and mechanically operated switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-phase-to-phase-voltmeter-selector","illustration":"https://eloragrid.ai/library/illustrations/iec-phase-to-phase-voltmeter-selector.svg"},{"slug":"iec-phase-to-neutral-voltmeter-selector","name":"Phase-to-neutral voltmeter selector","kind":"symbol","abbreviation":"HSW1S91","aliases":["Phase-to-neutral voltmeter selector symbol","HSW1S91","Phase-to-neutral voltmeter selector IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies selection among phase-to-neutral voltage measurement connections.","description":["This representation identifies selection among phase-to-neutral voltage measurement connections. The meter is connected to the selected phase relative to the documented neutral or reference point. That connection differs from measuring between two phase conductors.","Show the reference terminal and each selectable measurement path. The position table should make clear which reading the operator receives at each position."],"readingNotes":["Show the neutral/reference connection and each selected phase in the position table.","Phase-to-neutral and phase-to-phase measurements have different connection paths."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show the neutral/reference connection and each selected phase in the position table.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Phase-to-neutral and phase-to-phase measurements have different connection paths.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HSW1S91 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Show the neutral/reference connection and each selected phase in the position table."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-phase-to-neutral-voltmeter-selector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Phase-to-neutral voltmeter selector","reference":"Autodesk IEC-60617 Symbol Preview — Measurement-selection and mechanically operated switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-phase-to-neutral-voltmeter-selector","illustration":"https://eloragrid.ai/library/illustrations/iec-phase-to-neutral-voltmeter-selector.svg"},{"slug":"iec-combined-line-and-phase-voltmeter-selector","name":"Combined line and phase voltmeter selector","kind":"symbol","abbreviation":"HSW1S92","aliases":["Combined line and phase voltmeter selector symbol","HSW1S92","Combined line and phase voltmeter selector IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies a selector covering phase-to-phase and phase-to-neutral voltage measurements.","description":["This representation identifies a selector covering phase-to-phase and phase-to-neutral voltage measurements. One selector covers both line-to-line and line-to-neutral measurements. The measurement function changes with position even though the meter and its physical terminals remain the same.","List the selected conductor pair or phase/reference path for every position. Use the selected switch’s contact programme instead of inferring connections from the face labels alone."],"readingNotes":["Provide a position table specifying each measurement path.","The symbol cannot replace the actual switch contact programme."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Provide a position table specifying each measurement path.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The symbol cannot replace the actual switch contact programme.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HSW1S92 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Provide a position table specifying each measurement path."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-combined-line-and-phase-voltmeter-selector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Combined line and phase voltmeter selector","reference":"Autodesk IEC-60617 Symbol Preview — Measurement-selection and mechanically operated switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-combined-line-and-phase-voltmeter-selector","illustration":"https://eloragrid.ai/library/illustrations/iec-combined-line-and-phase-voltmeter-selector.svg"},{"slug":"iec-two-network-voltage-measurement-selector","name":"Two-network voltage measurement selector","kind":"symbol","abbreviation":"HSW1S93","aliases":["Two-network voltage measurement selector symbol","HSW1S93","Two-network voltage measurement selector IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation distinguishes voltage selection between two three-phase networks.","description":["This representation distinguishes voltage selection between two three-phase networks. The measurement is selected from more than one network or bus system. Both source identities must remain visible so that a reading is not attributed to the wrong supply.","Tag the two measurement sources and provide a position table with each voltage pair. This selector does not create a load-supply transfer arrangement between the networks."],"readingNotes":["Identify both sources and each selectable measurement connection.","Measurement selection between networks is not an automatic source-transfer power switch."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify both sources and each selectable measurement connection.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Measurement selection between networks is not an automatic source-transfer power switch.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HSW1S93 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Identify both sources and each selectable measurement connection."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-two-network-voltage-measurement-selector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Two-network voltage measurement selector","reference":"Autodesk IEC-60617 Symbol Preview — Measurement-selection and mechanically operated switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-two-network-voltage-measurement-selector","illustration":"https://eloragrid.ai/library/illustrations/iec-two-network-voltage-measurement-selector.svg"},{"slug":"iec-three-point-current-measurement-selector","name":"Three-point current measurement selector","kind":"symbol","abbreviation":"HSW1S94","aliases":["Three-point current measurement selector symbol","HSW1S94","Three-point current measurement selector IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies selection among three current-measurement points.","description":["This representation identifies selection among three current-measurement points. The meter is connected to one of three documented current-measurement circuits. When CT secondaries are involved, the selected switch arrangement must be considered with their continuity and test provisions.","Document the exact terminal and switching scheme from the selected equipment. The concept is an interpretation reference rather than a field switching or testing procedure."],"readingNotes":["Coordinate CT secondary handling and the selected meter-switch connection scheme.","A current selector cannot be treated as an ordinary voltage selector because CT circuits require documented continuity arrangements."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Coordinate CT secondary handling and the selected meter-switch connection scheme.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A current selector cannot be treated as an ordinary voltage selector because CT circuits require documented continuity arrangements.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HSW1S94 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Coordinate CT secondary handling and the selected meter-switch connection scheme."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-three-point-current-measurement-selector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Three-point current measurement selector","reference":"Autodesk IEC-60617 Symbol Preview — Measurement-selection and mechanically operated switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-three-point-current-measurement-selector","illustration":"https://eloragrid.ai/library/illustrations/iec-three-point-current-measurement-selector.svg"},{"slug":"iec-four-point-current-measurement-selector","name":"Four-point current measurement selector","kind":"symbol","abbreviation":"HSW1S95","aliases":["Four-point current measurement selector symbol","HSW1S95","Four-point current measurement selector IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies selection among four current-measurement points.","description":["This representation identifies selection among four current-measurement points. The additional measurement point expands the selected current-input circuits while retaining a common meter. Each position therefore needs an unambiguous circuit identity.","Provide all four measurement references and the actual terminal scheme. A voltage selector with the same number of positions is not an interchangeable current-measurement switch."],"readingNotes":["Provide the complete selected switch connection and measurement-point table.","The additional point is a circuit interface difference, not merely another drawing orientation."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Provide the complete selected switch connection and measurement-point table.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The additional point is a circuit interface difference, not merely another drawing orientation.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HSW1S95 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Provide the complete selected switch connection and measurement-point table."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-four-point-current-measurement-selector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Four-point current measurement selector","reference":"Autodesk IEC-60617 Symbol Preview — Measurement-selection and mechanically operated switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-four-point-current-measurement-selector","illustration":"https://eloragrid.ai/library/illustrations/iec-four-point-current-measurement-selector.svg"},{"slug":"iec-latched-pull-cord-switch","name":"Latched pull-cord switch","kind":"symbol","abbreviation":"HPC11L","aliases":["Latched pull-cord switch symbol","HPC11L, HPC12L","Latched pull-cord switch IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation distinguishes a pull-cord actuator whose operated state is latched.","description":["This representation distinguishes a pull-cord actuator whose operated state is latched.","Document the release/reset action and the NO or NC contacts actually fitted.","Latching behaviour differs from the pull-cord actuation method alone."],"readingNotes":["Document the release/reset action and the NO or NC contacts actually fitted.","Latching behaviour differs from the pull-cord actuation method alone."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document the release/reset action and the NO or NC contacts actually fitted.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Latching behaviour differs from the pull-cord actuation method alone.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HPC11L, HPC12L (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document the release/reset action and the NO or NC contacts actually fitted."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-latched-pull-cord-switch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Latched pull-cord switch","reference":"Autodesk IEC-60617 Symbol Preview — Measurement-selection and mechanically operated switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-latched-pull-cord-switch","illustration":"https://eloragrid.ai/library/illustrations/iec-latched-pull-cord-switch.svg"},{"slug":"iec-latched-foot-operated-switch","name":"Latched foot-operated switch","kind":"symbol","abbreviation":"HFT11L","aliases":["Latched foot-operated switch symbol","HFT11L, HFT12L","Latched foot-operated switch IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation distinguishes a foot actuator with a retained operated state.","description":["This representation distinguishes a foot actuator with a retained operated state.","Show reset/release behaviour and the associated contact conditions.","A latched pedal should not be read as a momentary foot switch."],"readingNotes":["Show reset/release behaviour and the associated contact conditions.","A latched pedal should not be read as a momentary foot switch."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show reset/release behaviour and the associated contact conditions.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A latched pedal should not be read as a momentary foot switch.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HFT11L, HFT12L (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Show reset/release behaviour and the associated contact conditions."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-latched-foot-operated-switch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Latched foot-operated switch","reference":"Autodesk IEC-60617 Symbol Preview — Measurement-selection and mechanically operated switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-latched-foot-operated-switch","illustration":"https://eloragrid.ai/library/illustrations/iec-latched-foot-operated-switch.svg"},{"slug":"iec-latched-lever-operated-switch","name":"Latched lever-operated switch","kind":"symbol","abbreviation":"HPB11LSL","aliases":["Latched lever-operated switch symbol","HPB11LSL, HPB12LSL","Latched lever-operated switch IEC reference"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation distinguishes a lever actuator with a maintained or latched operated state.","description":["This representation distinguishes a lever actuator with a maintained or latched operated state.","Cross-reference the retained position and its release mechanism.","The lever mechanism and contact state remain separate aspects of the circuit."],"readingNotes":["Cross-reference the retained position and its release mechanism.","The lever mechanism and contact state remain separate aspects of the circuit."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Cross-reference the retained position and its release mechanism.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The lever mechanism and contact state remain separate aspects of the circuit.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HPB11LSL, HPB12LSL (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Cross-reference the retained position and its release mechanism."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["relay-coil","normally-open-contact"],"artwork":"edu-iec-latched-lever-operated-switch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Latched lever-operated switch","reference":"Autodesk IEC-60617 Symbol Preview — Measurement-selection and mechanically operated switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-latched-lever-operated-switch","illustration":"https://eloragrid.ai/library/illustrations/iec-latched-lever-operated-switch.svg"},{"slug":"iec-three-phase-motor-with-four-connections","name":"Three-phase motor with four connections","kind":"symbol","abbreviation":"HMO14","aliases":["Three-phase motor with four connections symbol","HMO14","Three-phase motor with four connections IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation distinguishes the publisher's three-phase motor form with four indicated connections.","description":["This representation distinguishes the publisher's three-phase motor form with four indicated connections.","Verify the purpose of the fourth connection against the selected motor terminal diagram.","Do not assume the additional connection is a protective-earth terminal without the equipment documentation."],"readingNotes":["Verify the purpose of the fourth connection against the selected motor terminal diagram.","Do not assume the additional connection is a protective-earth terminal without the equipment documentation."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Verify the purpose of the fourth connection against the selected motor terminal diagram.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Do not assume the additional connection is a protective-earth terminal without the equipment documentation.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HMO14 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Verify the purpose of the fourth connection against the selected motor terminal diagram."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"autodesk-motors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-three-phase-motor-with-four-connections","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Three-phase motor with four connections","reference":"Autodesk IEC-60617 Symbol Preview — Three-phase motor forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-three-phase-motor-with-four-connections","illustration":"https://eloragrid.ai/library/illustrations/iec-three-phase-motor-with-four-connections.svg"},{"slug":"iec-three-phase-induction-motor-with-series-excitation","name":"Three-phase induction motor with series excitation","kind":"symbol","abbreviation":"HMO1M3","aliases":["Three-phase induction motor with series excitation symbol","HMO1M3","Three-phase induction motor with series excitation IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies the publisher's asynchronous motor form with series excitation.","description":["This representation identifies the publisher's asynchronous motor form with series excitation.","Document stator, excitation and any associated control connections separately.","The reference form does not identify a conventional squirrel-cage motor without an excitation circuit."],"readingNotes":["Document stator, excitation and any associated control connections separately.","The reference form does not identify a conventional squirrel-cage motor without an excitation circuit."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document stator, excitation and any associated control connections separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The reference form does not identify a conventional squirrel-cage motor without an excitation circuit.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HMO1M3 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document stator, excitation and any associated control connections separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"autodesk-motors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-three-phase-induction-motor-with-series-excitation","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Three-phase induction motor with series excitation","reference":"Autodesk IEC-60617 Symbol Preview — Three-phase motor forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-three-phase-induction-motor-with-series-excitation","illustration":"https://eloragrid.ai/library/illustrations/iec-three-phase-induction-motor-with-series-excitation.svg"},{"slug":"iec-star-stator-wound-rotor-motor-with-rotor-starter","name":"Star-stator wound-rotor motor with rotor starter","kind":"symbol","abbreviation":"HMO1M5","aliases":["Star-stator wound-rotor motor with rotor starter symbol","HMO1M5","Star-stator wound-rotor motor with rotor starter IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation distinguishes star-connected stator and a starter arrangement associated with the rotor circuit.","description":["This representation distinguishes star-connected stator and a starter arrangement associated with the rotor circuit.","Show stator supply, rotor connections and the selected starting equipment.","Rotor-circuit starting and stator voltage starting are different circuit arrangements."],"readingNotes":["Show stator supply, rotor connections and the selected starting equipment.","Rotor-circuit starting and stator voltage starting are different circuit arrangements."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show stator supply, rotor connections and the selected starting equipment.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Rotor-circuit starting and stator voltage starting are different circuit arrangements.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HMO1M5 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Show stator supply, rotor connections and the selected starting equipment."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"autodesk-motors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-star-stator-wound-rotor-motor-with-rotor-starter","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Star-stator wound-rotor motor with rotor starter","reference":"Autodesk IEC-60617 Symbol Preview — Three-phase motor forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-star-stator-wound-rotor-motor-with-rotor-starter","illustration":"https://eloragrid.ai/library/illustrations/iec-star-stator-wound-rotor-motor-with-rotor-starter.svg"},{"slug":"iec-six-pole-asynchronous-motor","name":"Six-pole asynchronous motor","kind":"symbol","abbreviation":"HMO1M11","aliases":["Six-pole asynchronous motor symbol","HMO1M11","Six-pole asynchronous motor IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form identifies the publisher's six-pole asynchronous motor representation.","description":["This form identifies the publisher's six-pole asynchronous motor representation.","Record the pole count and the selected supply/control interface in the schedule.","Six poles describe magnetic machine construction, not six electrical phases."],"readingNotes":["Record the pole count and the selected supply/control interface in the schedule.","Six poles describe magnetic machine construction, not six electrical phases."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Record the pole count and the selected supply/control interface in the schedule.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Six poles describe magnetic machine construction, not six electrical phases.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HMO1M11 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Record the pole count and the selected supply/control interface in the schedule."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"autodesk-motors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-six-pole-asynchronous-motor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Six-pole asynchronous motor","reference":"Autodesk IEC-60617 Symbol Preview — Three-phase motor forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-six-pole-asynchronous-motor","illustration":"https://eloragrid.ai/library/illustrations/iec-six-pole-asynchronous-motor.svg"},{"slug":"iec-single-phase-series-connected-ac-motor","name":"Single-phase series-connected AC motor","kind":"symbol","abbreviation":"HMO1M10","aliases":["Single-phase series-connected AC motor symbol","HMO1M10","Single-phase series-connected AC motor IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation distinguishes the publisher's single-phase AC motor with series connection.","description":["This representation distinguishes the publisher's single-phase AC motor with series connection.","Document the actual field/armature or winding connection from the selected machine.","Single-phase supply character does not establish an ordinary induction-motor winding arrangement."],"readingNotes":["Document the actual field/armature or winding connection from the selected machine.","Single-phase supply character does not establish an ordinary induction-motor winding arrangement."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document the actual field/armature or winding connection from the selected machine.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Single-phase supply character does not establish an ordinary induction-motor winding arrangement.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HMO1M10 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document the actual field/armature or winding connection from the selected machine."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-single-phase-motors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-single-phase-series-connected-ac-motor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Single-phase series-connected AC motor","reference":"Autodesk IEC-60617 Symbol Preview — Single-phase motor forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-single-phase-series-connected-ac-motor","illustration":"https://eloragrid.ai/library/illustrations/iec-single-phase-series-connected-ac-motor.svg"},{"slug":"iec-single-phase-synchronous-motor","name":"Single-phase synchronous motor","kind":"symbol","abbreviation":"HMO1M16","aliases":["Single-phase synchronous motor symbol","HMO1M16","Single-phase synchronous motor IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies a single-phase synchronous machine function.","description":["This representation identifies a single-phase synchronous machine function.","State the supply, starting and any excitation interface required by the actual motor.","Synchronous operation differs from induction-motor operating slip."],"readingNotes":["State the supply, starting and any excitation interface required by the actual motor.","Synchronous operation differs from induction-motor operating slip."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the supply, starting and any excitation interface required by the actual motor.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Synchronous operation differs from induction-motor operating slip.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HMO1M16 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the supply, starting and any excitation interface required by the actual motor."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-single-phase-motors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-single-phase-synchronous-motor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Single-phase synchronous motor","reference":"Autodesk IEC-60617 Symbol Preview — Single-phase motor forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-single-phase-synchronous-motor","illustration":"https://eloragrid.ai/library/illustrations/iec-single-phase-synchronous-motor.svg"},{"slug":"iec-permanent-magnet-linear-dc-motor","name":"Permanent-magnet linear DC motor","kind":"symbol","abbreviation":"HMO1M14","aliases":["Permanent-magnet linear DC motor symbol","HMO1M14","Permanent-magnet linear DC motor IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies linear motion produced by a permanent-magnet DC machine.","description":["This representation identifies linear motion produced by a permanent-magnet DC machine.","Show the drive interface and mechanically driven axis or load.","A linear motor is not simply a rotated rotary-motor drawing."],"readingNotes":["Show the drive interface and mechanically driven axis or load.","A linear motor is not simply a rotated rotary-motor drawing."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show the drive interface and mechanically driven axis or load.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A linear motor is not simply a rotated rotary-motor drawing.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HMO1M14 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Show the drive interface and mechanically driven axis or load."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-dc-motors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-permanent-magnet-linear-dc-motor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Permanent-magnet linear DC motor","reference":"Autodesk IEC-60617 Symbol Preview — DC, linear and stepping motor forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-permanent-magnet-linear-dc-motor","illustration":"https://eloragrid.ai/library/illustrations/iec-permanent-magnet-linear-dc-motor.svg"},{"slug":"iec-permanent-magnet-stepping-motor","name":"Permanent-magnet stepping motor","kind":"symbol","abbreviation":"HMO1M15","aliases":["Permanent-magnet stepping motor symbol","HMO1M15","Permanent-magnet stepping motor IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies a permanent-magnet stepping-motor function.","description":["This representation identifies a permanent-magnet stepping-motor function.","Cross-reference the phase/drive connections and the specified step-control interface.","A stepping motor requires a drive sequence rather than an ordinary continuously applied DC supply assumption."],"readingNotes":["Cross-reference the phase/drive connections and the specified step-control interface.","A stepping motor requires a drive sequence rather than an ordinary continuously applied DC supply assumption."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Cross-reference the phase/drive connections and the specified step-control interface.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A stepping motor requires a drive sequence rather than an ordinary continuously applied DC supply assumption.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HMO1M15 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Cross-reference the phase/drive connections and the specified step-control interface."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-dc-motors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-permanent-magnet-stepping-motor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Permanent-magnet stepping motor","reference":"Autodesk IEC-60617 Symbol Preview — DC, linear and stepping motor forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-permanent-magnet-stepping-motor","illustration":"https://eloragrid.ai/library/illustrations/iec-permanent-magnet-stepping-motor.svg"},{"slug":"iec-shunt-excited-dc-motor","name":"Shunt-excited DC motor","kind":"symbol","abbreviation":"HMO1M8","aliases":["Shunt-excited DC motor symbol","HMO1M8","Shunt-excited DC motor IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation distinguishes the publisher's derived or shunt-excitation DC motor form.","description":["This representation distinguishes the publisher's derived or shunt-excitation DC motor form.","Document the field connection separately from the armature circuit.","Shunt, series and separately supplied field arrangements are different connection topologies."],"readingNotes":["Document the field connection separately from the armature circuit.","Shunt, series and separately supplied field arrangements are different connection topologies."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document the field connection separately from the armature circuit.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Shunt, series and separately supplied field arrangements are different connection topologies.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HMO1M8 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document the field connection separately from the armature circuit."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-dc-motors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["motor","generator"],"artwork":"edu-iec-shunt-excited-dc-motor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Shunt-excited DC motor","reference":"Autodesk IEC-60617 Symbol Preview — DC, linear and stepping motor forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-shunt-excited-dc-motor","illustration":"https://eloragrid.ai/library/illustrations/iec-shunt-excited-dc-motor.svg"},{"slug":"iec-resistor-with-disconnecting-slider","name":"Resistor with disconnecting slider","kind":"symbol","abbreviation":"HVR1R5","aliases":["Resistor with disconnecting slider symbol","HVR1R5","Resistor with disconnecting slider IEC reference"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form distinguishes a movable resistor contact with a disconnecting position.","description":["This form distinguishes a movable resistor contact with a disconnecting position. The movable contact can leave the resistive track at its documented disconnecting position. This changes circuit continuity as well as the selected resistance.","Show the track ends, slider terminal and the off-position relationship. A generic potentiometer or variable-resistor graphic can omit this important additional operating state."],"readingNotes":["Show the track terminals, movable contact and the circuit condition at the off position.","A disconnecting slider is different from a continuously connected potentiometer wiper."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show the track terminals, movable contact and the circuit condition at the off position.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A disconnecting slider is different from a continuously connected potentiometer wiper.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HVR1R5 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Show the track terminals, movable contact and the circuit condition at the off position."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"autodesk-resistors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["resistor","capacitor"],"artwork":"edu-iec-resistor-with-disconnecting-slider","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Resistor with disconnecting slider","reference":"Autodesk IEC-60617 Symbol Preview — Resistive component forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-resistor-with-disconnecting-slider","illustration":"https://eloragrid.ai/library/illustrations/iec-resistor-with-disconnecting-slider.svg"},{"slug":"iec-carbon-disc-variable-resistor","name":"Carbon-disc variable resistor","kind":"symbol","abbreviation":"HVR1R8","aliases":["Carbon-disc variable resistor symbol","HVR1R8","Carbon-disc variable resistor IEC reference"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies the publisher's carbon-disc variable-resistance form.","description":["This representation identifies the publisher's carbon-disc variable-resistance form. The publisher identifies a variable resistive form using carbon discs as part of its operating construction. That identifies a component principle without assigning a resistance law or power rating.","Document the actual control mechanism and terminal arrangement where the device appears in a legacy circuit. It should not be silently replaced with a potentiometer having a different connection and operating behaviour."],"readingNotes":["State the resistance-control mechanism and associated terminals in the equipment description.","The material/mechanism indication is distinct from a generic electronic potentiometer."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State the resistance-control mechanism and associated terminals in the equipment description.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The material/mechanism indication is distinct from a generic electronic potentiometer.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HVR1R8 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State the resistance-control mechanism and associated terminals in the equipment description."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"autodesk-resistors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["resistor","capacitor"],"artwork":"edu-iec-carbon-disc-variable-resistor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Carbon-disc variable resistor","reference":"Autodesk IEC-60617 Symbol Preview — Resistive component forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-carbon-disc-variable-resistor","illustration":"https://eloragrid.ai/library/illustrations/iec-carbon-disc-variable-resistor.svg"},{"slug":"iec-magnetoresistive-element","name":"Magnetoresistive element","kind":"symbol","abbreviation":"HVR1S00689","aliases":["Magnetoresistive element symbol","HVR1S00689","Magnetoresistive element IEC reference"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies a resistive element whose response is associated with a magnetic field.","description":["This representation identifies a resistive element whose response is associated with a magnetic field. The component is a resistive sensing element associated with a magnetic field. It can participate in a larger measurement circuit rather than providing a ready-made contact output.","Identify any bridge, conditioning or controller input associated with the element. A magnetically operated switch has a different electrical output description."],"readingNotes":["Document the sensing circuit and output conditioning separately.","A magnetoresistive element is distinct from a magnetic contact switch."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document the sensing circuit and output conditioning separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A magnetoresistive element is distinct from a magnetic contact switch.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HVR1S00689 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document the sensing circuit and output conditioning separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"autodesk-resistors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["resistor","capacitor"],"artwork":"edu-iec-magnetoresistive-element","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Magnetoresistive element","reference":"Autodesk IEC-60617 Symbol Preview — Resistive component forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-magnetoresistive-element","illustration":"https://eloragrid.ai/library/illustrations/iec-magnetoresistive-element.svg"},{"slug":"iec-differential-capacitor","name":"Differential capacitor","kind":"symbol","abbreviation":"HCA1_S00573","aliases":["Differential capacitor symbol","HCA1_S00573","Differential capacitor IEC reference"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation distinguishes a differential capacitive arrangement with related variable capacitances.","description":["This representation distinguishes a differential capacitive arrangement with related variable capacitances. Related capacitor sections change in a coordinated differential arrangement. The common and section terminals therefore matter to interpreting the complete circuit.","Show those electrodes and the adjustment relationship in the detailed schematic. A single capacitance value or a two-terminal capacitor representation can hide the additional circuit interface."],"readingNotes":["Identify the electrode/common connections and the intended adjustment relationship.","A differential capacitor is not a generic two-terminal fixed capacitor."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Identify the electrode/common connections and the intended adjustment relationship.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A differential capacitor is not a generic two-terminal fixed capacitor.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HCA1_S00573 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Identify the electrode/common connections and the intended adjustment relationship."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"autodesk-capacitors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["resistor","capacitor"],"artwork":"edu-iec-differential-capacitor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Differential capacitor","reference":"Autodesk IEC-60617 Symbol Preview — Capacitive component forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-differential-capacitor","illustration":"https://eloragrid.ai/library/illustrations/iec-differential-capacitor.svg"},{"slug":"iec-preset-adjustable-capacitor","name":"Preset-adjustable capacitor","kind":"symbol","abbreviation":"HCA1_S00575","aliases":["Preset-adjustable capacitor symbol","HCA1_S00575","Preset-adjustable capacitor IEC reference"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form distinguishes a capacitor with a preset or trim adjustment.","description":["This form distinguishes a capacitor with a preset or trim adjustment. A trim or preset adjustment sets the capacitive value for the documented circuit function. The setting interface is different from a continuous operator adjustment in ordinary use.","Identify the adjustment function and the circuit terminals. The component value, range and setting method belong in the equipment or component documentation."],"readingNotes":["State how the capacitance setting is specified and which terminals belong to the device.","A preset adjustment is different from an operator-controlled variable capacitor."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","State how the capacitance setting is specified and which terminals belong to the device.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A preset adjustment is different from an operator-controlled variable capacitor.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HCA1_S00575 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"State how the capacitance setting is specified and which terminals belong to the device."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"autodesk-capacitors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["resistor","capacitor"],"artwork":"edu-iec-preset-adjustable-capacitor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Preset-adjustable capacitor","reference":"Autodesk IEC-60617 Symbol Preview — Capacitive component forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-preset-adjustable-capacitor","illustration":"https://eloragrid.ai/library/illustrations/iec-preset-adjustable-capacitor.svg"},{"slug":"iec-split-adjustable-capacitor","name":"Split adjustable capacitor","kind":"symbol","abbreviation":"HCA1_S00579","aliases":["Split adjustable capacitor symbol","HCA1_S00579","Split adjustable capacitor IEC reference"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation distinguishes the publisher's split and adjustable capacitor form.","description":["This representation distinguishes the publisher's split and adjustable capacitor form. More than one capacitive section belongs to the publisher’s split adjustable form. The section/common relationships and the coordinated adjustment are part of the circuit interpretation.","Keep separate section connections visible where they serve different circuit paths. The educational preview is not a substitute for the selected component’s terminal arrangement."],"readingNotes":["Document the split sections, common electrode and adjustment relationship.","Multiple capacitive sections must not be collapsed into a single unqualified capacitance value."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document the split sections, common electrode and adjustment relationship.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Multiple capacitive sections must not be collapsed into a single unqualified capacitance value.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HCA1_S00579 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document the split sections, common electrode and adjustment relationship."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"autodesk-capacitors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["resistor","capacitor"],"artwork":"edu-iec-split-adjustable-capacitor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Split adjustable capacitor","reference":"Autodesk IEC-60617 Symbol Preview — Capacitive component forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-split-adjustable-capacitor","illustration":"https://eloragrid.ai/library/illustrations/iec-split-adjustable-capacitor.svg"},{"slug":"iec-cable-identification-marker","name":"Cable identification marker","kind":"symbol","abbreviation":"HW01","aliases":["Cable identification marker symbol","HW01","Cable identification marker IEC reference"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A cable marker identifies a cable association within a schematic conductor group.","description":["A cable marker identifies a cable association within a schematic conductor group. The cable is an assembly identity shared by its cores, whereas individual wires and terminals have their own identifiers. A cable marker links schematic conductors with the cable schedule.","Keep cable tags, core designations and end connections consistent across the drawing package. A marker placed on one conductor does not imply that the cable contains only one core."],"readingNotes":["Coordinate the cable tag, core identity and from/to schedule.","A cable tag and a wire or core number identify different levels of the wiring arrangement."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Coordinate the cable tag, core identity and from/to schedule.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A cable tag and a wire or core number identify different levels of the wiring arrangement.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HW01 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Coordinate the cable tag, core identity and from/to schedule."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-cable","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-cable-identification-marker","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Cable identification marker","reference":"Autodesk IEC-60617 Symbol Preview — Cable identification and twisted-pair annotation; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-cable-identification-marker","illustration":"https://eloragrid.ai/library/illustrations/iec-cable-identification-marker.svg"},{"slug":"iec-additional-cable-core-marker","name":"Additional cable-core marker","kind":"symbol","abbreviation":"HW02","aliases":["Additional cable-core marker symbol","HW02","Additional cable-core marker IEC reference"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An additional-core marker associates another conductor with an existing cable record.","description":["An additional-core marker associates another conductor with an existing cable record. A child or additional-core marker expands the same cable identity to another conductor. It should preserve both the parent cable association and the unique core designation.","Check the parent/child association when copying or moving circuits. The additional marker is another view of the cable, not another cable to procure."],"readingNotes":["Link it to the cable parent and preserve the individual core identity.","A child cable marker should not be counted as another physical cable."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Link it to the cable parent and preserve the individual core identity.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A child cable marker should not be counted as another physical cable.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HW02 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Link it to the cable parent and preserve the individual core identity."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-cable","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-additional-cable-core-marker","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Additional cable-core marker","reference":"Autodesk IEC-60617 Symbol Preview — Cable identification and twisted-pair annotation; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-additional-cable-core-marker","illustration":"https://eloragrid.ai/library/illustrations/iec-additional-cable-core-marker.svg"},{"slug":"iec-twisted-pair-indication","name":"Twisted-pair indication","kind":"symbol","abbreviation":"HT0_TW","aliases":["Twisted-pair indication symbol","HT0_TW","Twisted-pair indication IEC reference"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A twisted-pair indication identifies the documented association of two conductors as a twisted pair.","description":["A twisted-pair indication identifies the documented association of two conductors as a twisted pair. The pair association matters to conductor identification and termination, even when the two wires are drawn apart elsewhere. It does not by itself describe the cable screen or its termination.","Preserve pair numbers and polarity through connector and terminal schedules. If a screen is required, draw and document that interface separately."],"readingNotes":["Record pair identity and the actual conductor mapping separately.","Twisting and shielding are different cable attributes; a twist indication does not prove a screen is present."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Record pair identity and the actual conductor mapping separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Twisting and shielding are different cable attributes; a twist indication does not prove a screen is present.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HT0_TW (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Record pair identity and the actual conductor mapping separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-cable","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-twisted-pair-indication","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Twisted-pair indication","reference":"Autodesk IEC-60617 Symbol Preview — Cable identification and twisted-pair annotation; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-twisted-pair-indication","illustration":"https://eloragrid.ai/library/illustrations/iec-twisted-pair-indication.svg"},{"slug":"iec-single-power-receptacle","name":"Single power receptacle","kind":"symbol","abbreviation":"HCN1RSGL","aliases":["Single power receptacle symbol","HCN1RSGL","Single power receptacle IEC reference"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form identifies a single power receptacle connection in the publisher's installation family.","description":["This form identifies a single power receptacle connection in the publisher's installation family.","Specify the selected outlet type, circuit and regional connection arrangement separately.","A schematic receptacle is distinct from a physical plug-and-socket connector in a control harness."],"readingNotes":["Specify the selected outlet type, circuit and regional connection arrangement separately.","A schematic receptacle is distinct from a physical plug-and-socket connector in a control harness."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Specify the selected outlet type, circuit and regional connection arrangement separately.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A schematic receptacle is distinct from a physical plug-and-socket connector in a control harness.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HCN1RSGL (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Specify the selected outlet type, circuit and regional connection arrangement separately."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-receptacles","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","generic-electrical-load"],"artwork":"edu-iec-single-power-receptacle","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Single power receptacle","reference":"Autodesk IEC-60617 Symbol Preview — Single and duplex power-receptacle forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-single-power-receptacle","illustration":"https://eloragrid.ai/library/illustrations/iec-single-power-receptacle.svg"},{"slug":"iec-duplex-power-receptacle","name":"Duplex power receptacle","kind":"symbol","abbreviation":"HCN1RDUP","aliases":["Duplex power receptacle symbol","HCN1RDUP","Duplex power receptacle IEC reference"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form distinguishes a duplex receptacle arrangement.","description":["This form distinguishes a duplex receptacle arrangement.","Document circuit connections and the actual device configuration rather than relying on the paired appearance.","A duplex indication does not establish independent supplies or a particular regional socket standard."],"readingNotes":["Document circuit connections and the actual device configuration rather than relying on the paired appearance.","A duplex indication does not establish independent supplies or a particular regional socket standard."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document circuit connections and the actual device configuration rather than relying on the paired appearance.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A duplex indication does not establish independent supplies or a particular regional socket standard.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HCN1RDUP (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document circuit connections and the actual device configuration rather than relying on the paired appearance."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-receptacles","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","generic-electrical-load"],"artwork":"edu-iec-duplex-power-receptacle","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Duplex power receptacle","reference":"Autodesk IEC-60617 Symbol Preview — Single and duplex power-receptacle forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-duplex-power-receptacle","illustration":"https://eloragrid.ai/library/illustrations/iec-duplex-power-receptacle.svg"},{"slug":"iec-generic-device-boundary","name":"Generic device boundary","kind":"symbol","abbreviation":"HDV1T6","aliases":["Generic device boundary symbol","HDV1T6, HDV1TC, HDV1TFL"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A generic device boundary groups the terminals belonging to one documented component or function.","description":["A generic device boundary groups the terminals belonging to one documented component or function.","Label the device role and actual terminal mapping on the boundary.","The box is a functional representation, not a cabinet footprint or certified internal circuit."],"readingNotes":["Label the device role and actual terminal mapping on the boundary.","The box is a functional representation, not a cabinet footprint or certified internal circuit."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Label the device role and actual terminal mapping on the boundary.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The box is a functional representation, not a cabinet footprint or certified internal circuit.","facts":[{"label":"Reference scope","value":"Publisher drafting annotation / connectivity convention"},{"label":"Publisher reference token","value":"HDV1T6, HDV1TC, HDV1TFL (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Label the device role and actual terminal mapping on the boundary."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-box","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-generic-device-boundary","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/iec-generic-device-boundary","illustration":"https://eloragrid.ai/library/illustrations/iec-generic-device-boundary.svg"},{"slug":"iec-standalone-source-cross-reference","name":"Standalone source cross-reference","kind":"symbol","abbreviation":"HA2S1_REF","aliases":["Standalone source cross-reference symbol","HA2S1_REF, HA3S1_REF, HA5S1_REF"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A source cross-reference identifies the originating side of a diagram continuation relationship.","description":["A source cross-reference identifies the originating side of a diagram continuation relationship. This is a navigation and association element linking a circuit or signal to its continuation. Its source role is meaningful only when the matching destination reference is present.","Use consistent reference text, sheet identifiers and locations at both ends. Cosmetic source shapes do not create different circuit functions."],"readingNotes":["Provide the matching destination reference, sheet and location information.","Rectangle, hexagon and ellipse presentation styles are kept as one source-reference concept."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Provide the matching destination reference, sheet and location information.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Rectangle, hexagon and ellipse presentation styles are kept as one source-reference concept.","facts":[{"label":"Reference scope","value":"Publisher drafting annotation / connectivity convention"},{"label":"Publisher reference token","value":"HA2S1_REF, HA3S1_REF, HA5S1_REF (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Provide the matching destination reference, sheet and location information."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-crossref","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-standalone-source-cross-reference","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/iec-standalone-source-cross-reference","illustration":"https://eloragrid.ai/library/illustrations/iec-standalone-source-cross-reference.svg"},{"slug":"iec-standalone-destination-cross-reference","name":"Standalone destination cross-reference","kind":"symbol","abbreviation":"HA2D1_REF","aliases":["Standalone destination cross-reference symbol","HA2D1_REF, HA3D1_REF, HA5D1_REF"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A destination cross-reference identifies the receiving side of a diagram continuation relationship.","description":["A destination cross-reference identifies the receiving side of a diagram continuation relationship. The destination marks where the referenced circuit or signal continues from its source. The relationship can span sheets without introducing another device or termination.","Check the source tag and the sheet/location reference after drawing changes. An apparently correct arrow can still point to a stale or unrelated continuation."],"readingNotes":["Check the source reference and the signal or circuit identity on both sheets.","A continuation reference does not imply a physical terminal or cable splice."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Check the source reference and the signal or circuit identity on both sheets.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A continuation reference does not imply a physical terminal or cable splice.","facts":[{"label":"Reference scope","value":"Publisher drafting annotation / connectivity convention"},{"label":"Publisher reference token","value":"HA2D1_REF, HA3D1_REF, HA5D1_REF (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Check the source reference and the signal or circuit identity on both sheets."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-crossref","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-standalone-destination-cross-reference","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/iec-standalone-destination-cross-reference","illustration":"https://eloragrid.ai/library/illustrations/iec-standalone-destination-cross-reference.svg"},{"slug":"iec-reference-only-wire-arrow","name":"Reference-only wire arrow","kind":"symbol","abbreviation":"HA1X1","aliases":["Reference-only wire arrow symbol","HA1X1, HA1X1Y"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A reference-only arrow directs the reader to an associated wire continuation or annotation.","description":["A reference-only arrow directs the reader to an associated wire continuation or annotation.","Distinguish the graphic's reference role from any software-managed signal link.","Changing the arrow orientation does not change the underlying engineering meaning."],"readingNotes":["Distinguish the graphic's reference role from any software-managed signal link.","Changing the arrow orientation does not change the underlying engineering meaning."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Distinguish the graphic's reference role from any software-managed signal link.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Changing the arrow orientation does not change the underlying engineering meaning.","facts":[{"label":"Reference scope","value":"Publisher drafting annotation / connectivity convention"},{"label":"Publisher reference token","value":"HA1X1, HA1X1Y (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Distinguish the graphic's reference role from any software-managed signal link."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-wire-arrow","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-reference-only-wire-arrow","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/iec-reference-only-wire-arrow","illustration":"https://eloragrid.ai/library/illustrations/iec-reference-only-wire-arrow.svg"},{"slug":"iec-one-line-connector-representation","name":"One-line connector representation","kind":"symbol","abbreviation":"HC01PJ_1-","aliases":["One-line connector representation symbol","HC01PJ_1-","One-line connector representation IEC reference"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A one-line connector representation identifies a connector interface in a simplified circuit view.","description":["A one-line connector representation identifies a connector interface in a simplified circuit view.","Cross-reference the detailed connector pin list and conductor mapping.","One line can represent several conductors; it is not a declaration of a single-pin connector."],"readingNotes":["Cross-reference the detailed connector pin list and conductor mapping.","One line can represent several conductors; it is not a declaration of a single-pin connector."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Cross-reference the detailed connector pin list and conductor mapping.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"One line can represent several conductors; it is not a declaration of a single-pin connector.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HC01PJ_1- (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Cross-reference the detailed connector pin list and conductor mapping."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-one-connector","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-one-line-connector-representation","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"One-line connector representation","reference":"Autodesk IEC-60617 Symbol Preview — One-line connector representation; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-one-line-connector-representation","illustration":"https://eloragrid.ai/library/illustrations/iec-one-line-connector-representation.svg"},{"slug":"iec-one-line-terminal-representation","name":"One-line terminal representation","kind":"symbol","abbreviation":"HT0001_1-","aliases":["One-line terminal representation symbol","HT0001_1-, HT0002_1-","One-line terminal representation IEC reference"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A one-line terminal identifies a termination point in a simplified circuit view.","description":["A one-line terminal identifies a termination point in a simplified circuit view.","Reference the terminal strip and detailed terminal numbers elsewhere in the drawing package.","Square and round presentation forms are kept together rather than treated as different terminal functions."],"readingNotes":["Reference the terminal strip and detailed terminal numbers elsewhere in the drawing package.","Square and round presentation forms are kept together rather than treated as different terminal functions."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Reference the terminal strip and detailed terminal numbers elsewhere in the drawing package.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Square and round presentation forms are kept together rather than treated as different terminal functions.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HT0001_1-, HT0002_1- (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Reference the terminal strip and detailed terminal numbers elsewhere in the drawing package."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-one-terminal","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-one-line-terminal-representation","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"One-line terminal representation","reference":"Autodesk IEC-60617 Symbol Preview — One-line terminal representation; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-one-line-terminal-representation","illustration":"https://eloragrid.ai/library/illustrations/iec-one-line-terminal-representation.svg"},{"slug":"iec-one-line-cable-identification","name":"One-line cable identification","kind":"symbol","abbreviation":"HW01_1-","aliases":["One-line cable identification symbol","HW01_1-","One-line cable identification IEC reference"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A one-line cable marker identifies the cable represented by a simplified connection line.","description":["A one-line cable marker identifies the cable represented by a simplified connection line.","Record the cable schedule reference and any expanded core information.","A one-line cable marker can stand for multiple cores and does not state conductor count by itself."],"readingNotes":["Record the cable schedule reference and any expanded core information.","A one-line cable marker can stand for multiple cores and does not state conductor count by itself."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Record the cable schedule reference and any expanded core information.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A one-line cable marker can stand for multiple cores and does not state conductor count by itself.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HW01_1- (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Record the cable schedule reference and any expanded core information."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-one-cable","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-one-line-cable-identification","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"One-line cable identification","reference":"Autodesk IEC-60617 Symbol Preview — One-line cable-marker representation; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-one-line-cable-identification","illustration":"https://eloragrid.ai/library/illustrations/iec-one-line-cable-identification.svg"},{"slug":"iec-one-line-bus-tap","name":"One-line bus tap","kind":"symbol","abbreviation":"HDV1_BT_1-","aliases":["One-line bus tap symbol","HDV1_BT_1-, HDV1_BTT_1-, HDV1_BTL_1-","One-line bus tap IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A bus-tap representation identifies a branch from a bus in a simplified power circuit.","description":["A bus-tap representation identifies a branch from a bus in a simplified power circuit.","Label the outgoing feeder and distinguish actual branch connectivity from crossing lines.","Dot, tee and corner layouts are presentation variants, not separate equipment models."],"readingNotes":["Label the outgoing feeder and distinguish actual branch connectivity from crossing lines.","Dot, tee and corner layouts are presentation variants, not separate equipment models."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Label the outgoing feeder and distinguish actual branch connectivity from crossing lines.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Dot, tee and corner layouts are presentation variants, not separate equipment models.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HDV1_BT_1-, HDV1_BTT_1-, HDV1_BTL_1- (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Label the outgoing feeder and distinguish actual branch connectivity from crossing lines."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-one-bus","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","generic-electrical-load"],"artwork":"edu-iec-one-line-bus-tap","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"One-line bus tap","reference":"Autodesk IEC-60617 Symbol Preview — One-line bus-tap representation; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-one-line-bus-tap","illustration":"https://eloragrid.ai/library/illustrations/iec-one-line-bus-tap.svg"},{"slug":"iec-one-line-power-receptacle","name":"One-line power receptacle","kind":"symbol","abbreviation":"HC01WR_1-","aliases":["One-line power receptacle symbol","HC01WR_1-","One-line power receptacle IEC reference"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A one-line receptacle represents a power outlet within a simplified circuit view.","description":["A one-line receptacle represents a power outlet within a simplified circuit view.","Cross-reference the installation symbol, circuit schedule and actual outlet specification.","The reduced one-line graphic does not provide pin or socket configuration."],"readingNotes":["Cross-reference the installation symbol, circuit schedule and actual outlet specification.","The reduced one-line graphic does not provide pin or socket configuration."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Cross-reference the installation symbol, circuit schedule and actual outlet specification.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The reduced one-line graphic does not provide pin or socket configuration.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HC01WR_1- (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Cross-reference the installation symbol, circuit schedule and actual outlet specification."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-one-line-load","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","generic-electrical-load"],"artwork":"edu-iec-one-line-power-receptacle","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"One-line power receptacle","reference":"Autodesk IEC-60617 Symbol Preview — One-line load and receptacle representations; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-one-line-power-receptacle","illustration":"https://eloragrid.ai/library/illustrations/iec-one-line-power-receptacle.svg"},{"slug":"iec-connector-retaining-wire-identity","name":"Connector retaining wire identity","kind":"symbol","abbreviation":"HC01PJ","aliases":["Connector retaining wire identity symbol","HC01PJ, HC01PJ1","Connector retaining wire identity IEC reference"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form identifies a separable connector whose publisher representation preserves wire-number identity across the interface.","description":["This form identifies a separable connector whose publisher representation preserves wire-number identity across the interface. The electrical connection passes through mating connector pins while the drafting system retains the wire identifier. Connector tags and pin numbers still describe the separable interface.","Use the pin mapping to link both sides and retain connector identity even where wire labels match. A wiring report should not erase the physical connector simply because the number is continuous."],"readingNotes":["Document connector and pin tags independently of the continuous wire identifier.","Wire-number continuity is a drafting-data convention and does not eliminate the connector's separable physical interface."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document connector and pin tags independently of the continuous wire identifier.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Wire-number continuity is a drafting-data convention and does not eliminate the connector's separable physical interface.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HC01PJ, HC01PJ1 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document connector and pin tags independently of the continuous wire identifier."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-connectors","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-connector-retaining-wire-identity","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Connector retaining wire identity","reference":"Autodesk IEC-60617 Symbol Preview — Connector forms that retain wire numbers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-connector-retaining-wire-identity","illustration":"https://eloragrid.ai/library/illustrations/iec-connector-retaining-wire-identity.svg"},{"slug":"iec-connector-changing-wire-identity","name":"Connector changing wire identity","kind":"symbol","abbreviation":"HCN1PJ","aliases":["Connector changing wire identity symbol","HCN1PJ","Connector changing wire identity IEC reference"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This form identifies a connector representation that allows wire-number identities to change across the interface.","description":["This form identifies a connector representation that allows wire-number identities to change across the interface. The two sides retain their separate wire identifiers while the connector pin mapping shows how they connect. That numbering rule does not create a conversion or an isolated electrical function.","Record both wire labels at the correct pin identities. The mating connector relationship is the evidence of continuity across the numbering change."],"readingNotes":["Keep both wire identifiers tied to the correct mating pins.","A change in wire number does not by itself indicate electrical isolation, conversion or a change in voltage."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Keep both wire identifiers tied to the correct mating pins.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A change in wire number does not by itself indicate electrical isolation, conversion or a change in voltage.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HCN1PJ (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Keep both wire identifiers tied to the correct mating pins."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-connector-numbering","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-connector-changing-wire-identity","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Connector changing wire identity","reference":"Autodesk IEC-60617 Symbol Preview — Connector forms that change wire numbers; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-connector-changing-wire-identity","illustration":"https://eloragrid.ai/library/illustrations/iec-connector-changing-wire-identity.svg"},{"slug":"iec-terminal-carrying-wire-identification","name":"Terminal carrying wire identification","kind":"symbol","abbreviation":"HT0W02","aliases":["Terminal carrying wire identification symbol","HT0W02","Terminal carrying wire identification IEC reference"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This terminal representation carries the associated wire identifier at the connection point.","description":["This terminal representation carries the associated wire identifier at the connection point.","Distinguish the wire identifier from the terminal position number in the schedule.","A wire number and a terminal number should not be substituted for each other."],"readingNotes":["Distinguish the wire identifier from the terminal position number in the schedule.","A wire number and a terminal number should not be substituted for each other."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Distinguish the wire identifier from the terminal position number in the schedule.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A wire number and a terminal number should not be substituted for each other.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HT0W02 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Distinguish the wire identifier from the terminal position number in the schedule."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"autodesk-terminals","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-terminal-carrying-wire-identification","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Terminal carrying wire identification","reference":"Autodesk IEC-60617 Symbol Preview — Terminal numbering forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-terminal-carrying-wire-identification","illustration":"https://eloragrid.ai/library/illustrations/iec-terminal-carrying-wire-identification.svg"},{"slug":"iec-terminal-with-wire-number-transition","name":"Terminal with wire-number transition","kind":"symbol","abbreviation":"HT1002","aliases":["Terminal with wire-number transition symbol","HT1002","Terminal with wire-number transition IEC reference"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies a terminal across which the publisher permits a wire-number change.","description":["This representation identifies a terminal across which the publisher permits a wire-number change.","Document incoming and outgoing wire identities alongside the terminal tag.","A numbering transition is not evidence of a circuit discontinuity or an isolating terminal."],"readingNotes":["Document incoming and outgoing wire identities alongside the terminal tag.","A numbering transition is not evidence of a circuit discontinuity or an isolating terminal."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document incoming and outgoing wire identities alongside the terminal tag.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A numbering transition is not evidence of a circuit discontinuity or an isolating terminal.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HT1002 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document incoming and outgoing wire identities alongside the terminal tag."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"autodesk-terminals","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-terminal-with-wire-number-transition","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Terminal with wire-number transition","reference":"Autodesk IEC-60617 Symbol Preview — Terminal numbering forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-terminal-with-wire-number-transition","illustration":"https://eloragrid.ai/library/illustrations/iec-terminal-with-wire-number-transition.svg"},{"slug":"iec-conductor-connection-junction","name":"Conductor connection junction","kind":"symbol","abbreviation":"JUNCTION","aliases":["Conductor connection junction symbol"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A junction indication marks a documented electrical connection between conductor branches.","description":["A junction indication marks a documented electrical connection between conductor branches. The junction is a drawing connectivity statement: the branches belong to one connected electrical network at that point. It is different from a hardware splice which may have its own material and installation record.","Apply the drawing legend’s junction convention consistently and check the CAD connection data. Visual line overlap is not sufficient evidence that an automatic wire report will treat the lines as connected."],"readingNotes":["Check the connection mark and CAD connectivity at every branch rather than inferring connection from line proximity.","A crossing line is not necessarily a connected conductor."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Check the connection mark and CAD connectivity at every branch rather than inferring connection from line proximity.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A crossing line is not necessarily a connected conductor.","facts":[{"label":"Reference scope","value":"Publisher drafting annotation / connectivity convention"},{"label":"Documentation scope","value":"Wire insertion and connectivity behaviour; no publisher block identifier or IEC database ID is asserted."},{"label":"Information added","value":"Check the connection mark and CAD connectivity at every branch rather than inferring connection from line proximity."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-wire-connections","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-conductor-connection-junction","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/iec-conductor-connection-junction","illustration":"https://eloragrid.ai/library/illustrations/iec-conductor-connection-junction.svg"},{"slug":"iec-unconnected-conductor-crossing","name":"Unconnected conductor crossing","kind":"symbol","abbreviation":"CROSSING","aliases":["Unconnected conductor crossing symbol"],"category":"connections-wiring","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An unconnected crossing shows conductors passing across each other in the drawing without an electrical junction.","description":["An unconnected crossing shows conductors passing across each other in the drawing without an electrical junction. The wires overlap in the two-dimensional page layout but remain distinct circuits. A gap or bridge/loop makes that distinction visible where the selected drawing convention uses one.","Check both the displayed graphic and the CAD network topology. A crossing must not acquire an unintended junction when drawing segments are moved or edited."],"readingNotes":["Apply the selected gap or loop convention consistently and check that no connection node is created.","A gap or bridge is a drafting convention, not a physical cable crossover dimension."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Apply the selected gap or loop convention consistently and check that no connection node is created.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A gap or bridge is a drafting convention, not a physical cable crossover dimension.","facts":[{"label":"Reference scope","value":"Publisher drafting annotation / connectivity convention"},{"label":"Documentation scope","value":"Wire insertion and connectivity behaviour; no publisher block identifier or IEC database ID is asserted."},{"label":"Information added","value":"Apply the selected gap or loop convention consistently and check that no connection node is created."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-wire-connections","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["terminal","busbar"],"artwork":"edu-iec-unconnected-conductor-crossing","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/iec-unconnected-conductor-crossing","illustration":"https://eloragrid.ai/library/illustrations/iec-unconnected-conductor-crossing.svg"},{"slug":"iec-three-phase-conductor-group","name":"Three-phase conductor group","kind":"symbol","abbreviation":"3~","aliases":["Three-phase conductor group symbol"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A conductor group represents the documented phase conductors of a circuit shown individually.","description":["A conductor group represents the documented phase conductors of a circuit shown individually. Drawing the phase conductors individually expands a system that may also appear as one line in an SLD. The individual view makes terminations and phase mapping visible.","Keep phase labels through branches and changes of direction. Where the drawing returns to a simplified one-line view, provide a clear circuit cross-reference."],"readingNotes":["Keep phase sequence and connection mapping explicit when the group branches or changes direction.","A three-line group is different from a single-line equivalent representation of the same system."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Keep phase sequence and connection mapping explicit when the group branches or changes direction.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A three-line group is different from a single-line equivalent representation of the same system.","facts":[{"label":"Reference scope","value":"Publisher drafting annotation / connectivity convention"},{"label":"Documentation scope","value":"Wire insertion and connectivity behaviour; no publisher block identifier or IEC database ID is asserted."},{"label":"Information added","value":"Keep phase sequence and connection mapping explicit when the group branches or changes direction."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"iec-public-wire-connections","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["power-converter","generic-electrical-load"],"artwork":"edu-iec-three-phase-conductor-group","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/iec-three-phase-conductor-group","illustration":"https://eloragrid.ai/library/illustrations/iec-three-phase-conductor-group.svg"},{"slug":"iec-dy5-transformer-connection-reference","name":"Dy5 transformer connection reference","kind":"symbol","abbreviation":"Dy5","aliases":["Dy5 transformer connection reference symbol","HXF1T21","Dy5 transformer connection reference IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This reference identifies the publisher's Dy5 transformer connection form with delta/star winding topology.","description":["Dy5 combines an HV-side delta winding designation with an LV-side star designation and clock group 5. The letters describe connection topology; the final number identifies the phase relationship recorded with the transformer connection diagram. It is different from the voltage ratio or the number of terminals.","A drafter should preserve the full Dy5 designation across the SLD, transformer schedule and protection references. Two devices with the same winding letters but a different clock number are not the same connection reference. Check the selected transformer terminal diagram and the protection application documentation; the concept preview does not specify polarity tests, parallel-operation suitability or relay settings."],"readingNotes":["Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","The clock-group suffix is different from a voltage ratio, power rating or physical terminal number."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The clock-group suffix is different from a voltage ratio, power rating or physical terminal number.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HXF1T21 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"},{"label":"HV winding topology","value":"delta"},{"label":"LV winding topology","value":"star"},{"label":"Clock-group label","value":"5"}],"references":[{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."},{"sourceId":"iec-public-vector-interpretation","relevance":"Manufacturer application context explains why winding type and clock number must be kept distinct in transformer protection documentation. No relay settings are prescribed here."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-iec-dy5-transformer-connection-reference","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Dy5 transformer connection reference","reference":"Autodesk IEC-60617 Symbol Preview — Three-phase transformer and vector-group forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-dy5-transformer-connection-reference","illustration":"https://eloragrid.ai/library/illustrations/iec-dy5-transformer-connection-reference.svg"},{"slug":"iec-dd6-transformer-connection-reference","name":"Dd6 transformer connection reference","kind":"symbol","abbreviation":"Dd6","aliases":["Dd6 transformer connection reference symbol","HXF1T22","Dd6 transformer connection reference IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This reference identifies the publisher's Dd6 transformer connection form with delta/delta winding topology.","description":["Dd6 combines an HV-side delta winding designation with an LV-side delta designation and clock group 6. The letters describe connection topology; the final number identifies the phase relationship recorded with the transformer connection diagram. It is different from the voltage ratio or the number of terminals.","A drafter should preserve the full Dd6 designation across the SLD, transformer schedule and protection references. Even when both windings use delta topology, the clock-group information remains a separate part of the connection designation. Check the selected transformer terminal diagram and the protection application documentation; the concept preview does not specify polarity tests, parallel-operation suitability or relay settings."],"readingNotes":["Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","The clock-group suffix is different from a voltage ratio, power rating or physical terminal number."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The clock-group suffix is different from a voltage ratio, power rating or physical terminal number.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HXF1T22 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"},{"label":"HV winding topology","value":"delta"},{"label":"LV winding topology","value":"delta"},{"label":"Clock-group label","value":"6"}],"references":[{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."},{"sourceId":"iec-public-vector-interpretation","relevance":"Manufacturer application context explains why winding type and clock number must be kept distinct in transformer protection documentation. No relay settings are prescribed here."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-iec-dd6-transformer-connection-reference","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Dd6 transformer connection reference","reference":"Autodesk IEC-60617 Symbol Preview — Three-phase transformer and vector-group forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-dd6-transformer-connection-reference","illustration":"https://eloragrid.ai/library/illustrations/iec-dd6-transformer-connection-reference.svg"},{"slug":"iec-yd5-transformer-connection-reference","name":"Yd5 transformer connection reference","kind":"symbol","abbreviation":"Yd5","aliases":["Yd5 transformer connection reference symbol","HXF1T23","Yd5 transformer connection reference IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This reference identifies the publisher's Yd5 transformer connection form with star/delta winding topology.","description":["Yd5 combines an HV-side star winding designation with an LV-side delta designation and clock group 5. The letters describe connection topology; the final number identifies the phase relationship recorded with the transformer connection diagram. It is different from the voltage ratio or the number of terminals.","A drafter should preserve the full Yd5 designation across the SLD, transformer schedule and protection references. Two devices with the same winding letters but a different clock number are not the same connection reference. Check the selected transformer terminal diagram and the protection application documentation; the concept preview does not specify polarity tests, parallel-operation suitability or relay settings."],"readingNotes":["Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","The clock-group suffix is different from a voltage ratio, power rating or physical terminal number."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The clock-group suffix is different from a voltage ratio, power rating or physical terminal number.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HXF1T23 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"},{"label":"HV winding topology","value":"star"},{"label":"LV winding topology","value":"delta"},{"label":"Clock-group label","value":"5"}],"references":[{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."},{"sourceId":"iec-public-vector-interpretation","relevance":"Manufacturer application context explains why winding type and clock number must be kept distinct in transformer protection documentation. No relay settings are prescribed here."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-iec-yd5-transformer-connection-reference","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Yd5 transformer connection reference","reference":"Autodesk IEC-60617 Symbol Preview — Three-phase transformer and vector-group forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-yd5-transformer-connection-reference","illustration":"https://eloragrid.ai/library/illustrations/iec-yd5-transformer-connection-reference.svg"},{"slug":"iec-yy6-transformer-connection-reference","name":"Yy6 transformer connection reference","kind":"symbol","abbreviation":"Yy6","aliases":["Yy6 transformer connection reference symbol","HXF1T24","Yy6 transformer connection reference IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This reference identifies the publisher's Yy6 transformer connection form with star/star winding topology.","description":["Yy6 combines an HV-side star winding designation with an LV-side star designation and clock group 6. The letters describe connection topology; the final number identifies the phase relationship recorded with the transformer connection diagram. It is different from the voltage ratio or the number of terminals.","A drafter should preserve the full Yy6 designation across the SLD, transformer schedule and protection references. Even when both windings use star topology, the clock-group information remains a separate part of the connection designation. Check the selected transformer terminal diagram and the protection application documentation; the concept preview does not specify polarity tests, parallel-operation suitability or relay settings."],"readingNotes":["Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","The clock-group suffix is different from a voltage ratio, power rating or physical terminal number."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The clock-group suffix is different from a voltage ratio, power rating or physical terminal number.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HXF1T24 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"},{"label":"HV winding topology","value":"star"},{"label":"LV winding topology","value":"star"},{"label":"Clock-group label","value":"6"}],"references":[{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."},{"sourceId":"iec-public-vector-interpretation","relevance":"Manufacturer application context explains why winding type and clock number must be kept distinct in transformer protection documentation. No relay settings are prescribed here."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-iec-yy6-transformer-connection-reference","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Yy6 transformer connection reference","reference":"Autodesk IEC-60617 Symbol Preview — Three-phase transformer and vector-group forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-yy6-transformer-connection-reference","illustration":"https://eloragrid.ai/library/illustrations/iec-yy6-transformer-connection-reference.svg"},{"slug":"iec-yd11-transformer-connection-reference","name":"Yd11 transformer connection reference","kind":"symbol","abbreviation":"Yd11","aliases":["Yd11 transformer connection reference symbol","HXF1T25","Yd11 transformer connection reference IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This reference identifies the publisher's Yd11 transformer connection form with star/delta winding topology.","description":["Yd11 combines an HV-side star winding designation with an LV-side delta designation and clock group 11. The letters describe connection topology; the final number identifies the phase relationship recorded with the transformer connection diagram. It is different from the voltage ratio or the number of terminals.","A drafter should preserve the full Yd11 designation across the SLD, transformer schedule and protection references. Two devices with the same winding letters but a different clock number are not the same connection reference. Check the selected transformer terminal diagram and the protection application documentation; the concept preview does not specify polarity tests, parallel-operation suitability or relay settings."],"readingNotes":["Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","The clock-group suffix is different from a voltage ratio, power rating or physical terminal number."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The clock-group suffix is different from a voltage ratio, power rating or physical terminal number.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HXF1T25 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"},{"label":"HV winding topology","value":"star"},{"label":"LV winding topology","value":"delta"},{"label":"Clock-group label","value":"11"}],"references":[{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."},{"sourceId":"iec-public-vector-interpretation","relevance":"Manufacturer application context explains why winding type and clock number must be kept distinct in transformer protection documentation. No relay settings are prescribed here."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-iec-yd11-transformer-connection-reference","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Yd11 transformer connection reference","reference":"Autodesk IEC-60617 Symbol Preview — Three-phase transformer and vector-group forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-yd11-transformer-connection-reference","illustration":"https://eloragrid.ai/library/illustrations/iec-yd11-transformer-connection-reference.svg"},{"slug":"iec-dy11-transformer-connection-reference","name":"Dy11 transformer connection reference","kind":"symbol","abbreviation":"Dy11","aliases":["Dy11 transformer connection reference symbol","HXF1T26","Dy11 transformer connection reference IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This reference identifies the publisher's Dy11 transformer connection form with delta/star winding topology.","description":["Dy11 combines an HV-side delta winding designation with an LV-side star designation and clock group 11. The letters describe connection topology; the final number identifies the phase relationship recorded with the transformer connection diagram. It is different from the voltage ratio or the number of terminals.","A drafter should preserve the full Dy11 designation across the SLD, transformer schedule and protection references. Two devices with the same winding letters but a different clock number are not the same connection reference. Check the selected transformer terminal diagram and the protection application documentation; the concept preview does not specify polarity tests, parallel-operation suitability or relay settings."],"readingNotes":["Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","The clock-group suffix is different from a voltage ratio, power rating or physical terminal number."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The clock-group suffix is different from a voltage ratio, power rating or physical terminal number.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HXF1T26 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"},{"label":"HV winding topology","value":"delta"},{"label":"LV winding topology","value":"star"},{"label":"Clock-group label","value":"11"}],"references":[{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."},{"sourceId":"iec-public-vector-interpretation","relevance":"Manufacturer application context explains why winding type and clock number must be kept distinct in transformer protection documentation. No relay settings are prescribed here."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-iec-dy11-transformer-connection-reference","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Dy11 transformer connection reference","reference":"Autodesk IEC-60617 Symbol Preview — Three-phase transformer and vector-group forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-dy11-transformer-connection-reference","illustration":"https://eloragrid.ai/library/illustrations/iec-dy11-transformer-connection-reference.svg"},{"slug":"iec-dz0-transformer-connection-reference","name":"Dz0 transformer connection reference","kind":"symbol","abbreviation":"Dz0","aliases":["Dz0 transformer connection reference symbol","HXF1T27","Dz0 transformer connection reference IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This reference identifies the publisher's Dz0 transformer connection form with delta/zigzag winding topology.","description":["Dz0 combines an HV-side delta winding designation with an LV-side zigzag designation and clock group 0. The letters describe connection topology; the final number identifies the phase relationship recorded with the transformer connection diagram. It is different from the voltage ratio or the number of terminals.","A drafter should preserve the full Dz0 designation across the SLD, transformer schedule and protection references. A zigzag winding must retain its own topology label rather than be abbreviated to an ordinary star winding. Check the selected transformer terminal diagram and the protection application documentation; the concept preview does not specify polarity tests, parallel-operation suitability or relay settings."],"readingNotes":["Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","The clock-group suffix is different from a voltage ratio, power rating or physical terminal number."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The clock-group suffix is different from a voltage ratio, power rating or physical terminal number.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HXF1T27 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"},{"label":"HV winding topology","value":"delta"},{"label":"LV winding topology","value":"zigzag"},{"label":"Clock-group label","value":"0"}],"references":[{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."},{"sourceId":"iec-public-vector-interpretation","relevance":"Manufacturer application context explains why winding type and clock number must be kept distinct in transformer protection documentation. No relay settings are prescribed here."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-iec-dz0-transformer-connection-reference","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Dz0 transformer connection reference","reference":"Autodesk IEC-60617 Symbol Preview — Three-phase transformer and vector-group forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-dz0-transformer-connection-reference","illustration":"https://eloragrid.ai/library/illustrations/iec-dz0-transformer-connection-reference.svg"},{"slug":"iec-yz5-transformer-connection-reference","name":"Yz5 transformer connection reference","kind":"symbol","abbreviation":"Yz5","aliases":["Yz5 transformer connection reference symbol","HXF1T28","Yz5 transformer connection reference IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This reference identifies the publisher's Yz5 transformer connection form with star/zigzag winding topology.","description":["Yz5 combines an HV-side star winding designation with an LV-side zigzag designation and clock group 5. The letters describe connection topology; the final number identifies the phase relationship recorded with the transformer connection diagram. It is different from the voltage ratio or the number of terminals.","A drafter should preserve the full Yz5 designation across the SLD, transformer schedule and protection references. Two devices with the same winding letters but a different clock number are not the same connection reference. Check the selected transformer terminal diagram and the protection application documentation; the concept preview does not specify polarity tests, parallel-operation suitability or relay settings."],"readingNotes":["Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","The clock-group suffix is different from a voltage ratio, power rating or physical terminal number."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The clock-group suffix is different from a voltage ratio, power rating or physical terminal number.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HXF1T28 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"},{"label":"HV winding topology","value":"star"},{"label":"LV winding topology","value":"zigzag"},{"label":"Clock-group label","value":"5"}],"references":[{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."},{"sourceId":"iec-public-vector-interpretation","relevance":"Manufacturer application context explains why winding type and clock number must be kept distinct in transformer protection documentation. No relay settings are prescribed here."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-iec-yz5-transformer-connection-reference","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Yz5 transformer connection reference","reference":"Autodesk IEC-60617 Symbol Preview — Three-phase transformer and vector-group forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-yz5-transformer-connection-reference","illustration":"https://eloragrid.ai/library/illustrations/iec-yz5-transformer-connection-reference.svg"},{"slug":"iec-dz6-transformer-connection-reference","name":"Dz6 transformer connection reference","kind":"symbol","abbreviation":"Dz6","aliases":["Dz6 transformer connection reference symbol","HXF1T29","Dz6 transformer connection reference IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This reference identifies the publisher's Dz6 transformer connection form with delta/zigzag winding topology.","description":["Dz6 combines an HV-side delta winding designation with an LV-side zigzag designation and clock group 6. The letters describe connection topology; the final number identifies the phase relationship recorded with the transformer connection diagram. It is different from the voltage ratio or the number of terminals.","A drafter should preserve the full Dz6 designation across the SLD, transformer schedule and protection references. A zigzag winding must retain its own topology label rather than be abbreviated to an ordinary star winding. Check the selected transformer terminal diagram and the protection application documentation; the concept preview does not specify polarity tests, parallel-operation suitability or relay settings."],"readingNotes":["Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","The clock-group suffix is different from a voltage ratio, power rating or physical terminal number."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The clock-group suffix is different from a voltage ratio, power rating or physical terminal number.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HXF1T29 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"},{"label":"HV winding topology","value":"delta"},{"label":"LV winding topology","value":"zigzag"},{"label":"Clock-group label","value":"6"}],"references":[{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."},{"sourceId":"iec-public-vector-interpretation","relevance":"Manufacturer application context explains why winding type and clock number must be kept distinct in transformer protection documentation. No relay settings are prescribed here."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-iec-dz6-transformer-connection-reference","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Dz6 transformer connection reference","reference":"Autodesk IEC-60617 Symbol Preview — Three-phase transformer and vector-group forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-dz6-transformer-connection-reference","illustration":"https://eloragrid.ai/library/illustrations/iec-dz6-transformer-connection-reference.svg"},{"slug":"iec-yz11-transformer-connection-reference","name":"Yz11 transformer connection reference","kind":"symbol","abbreviation":"Yz11","aliases":["Yz11 transformer connection reference symbol","HXF1T30","Yz11 transformer connection reference IEC reference"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This reference identifies the publisher's Yz11 transformer connection form with star/zigzag winding topology.","description":["Yz11 combines an HV-side star winding designation with an LV-side zigzag designation and clock group 11. The letters describe connection topology; the final number identifies the phase relationship recorded with the transformer connection diagram. It is different from the voltage ratio or the number of terminals.","A drafter should preserve the full Yz11 designation across the SLD, transformer schedule and protection references. Two devices with the same winding letters but a different clock number are not the same connection reference. Check the selected transformer terminal diagram and the protection application documentation; the concept preview does not specify polarity tests, parallel-operation suitability or relay settings."],"readingNotes":["Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","The clock-group suffix is different from a voltage ratio, power rating or physical terminal number."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"The clock-group suffix is different from a voltage ratio, power rating or physical terminal number.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HXF1T30 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Preserve the full group notation and verify the terminal/phase relationship in the selected transformer diagram."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"},{"label":"HV winding topology","value":"star"},{"label":"LV winding topology","value":"zigzag"},{"label":"Clock-group label","value":"11"}],"references":[{"sourceId":"pub-symbol-three-phase-transformers","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."},{"sourceId":"iec-public-vector-interpretation","relevance":"Manufacturer application context explains why winding type and clock number must be kept distinct in transformer protection documentation. No relay settings are prescribed here."}],"related":["power-transformer","voltage-transformer"],"artwork":"edu-iec-yz11-transformer-connection-reference","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Yz11 transformer connection reference","reference":"Autodesk IEC-60617 Symbol Preview — Three-phase transformer and vector-group forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-yz11-transformer-connection-reference","illustration":"https://eloragrid.ai/library/illustrations/iec-yz11-transformer-connection-reference.svg"},{"slug":"schottky-diode","name":"Schottky diode","kind":"symbol","abbreviation":"SBD","aliases":["Schottky rectifier","barrier diode"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A metal-semiconductor diode used for rectification or clamping with device-specific forward and reverse characteristics.","description":["A metal-semiconductor diode used for rectification or clamping with device-specific forward and reverse characteristics.","On a schematic, identify anode and cathode polarity and the selected reverse rating and trace the rectification or clamp current path. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A Schottky diode is a distinct junction technology; its forward drop is not a fixed universal value.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify anode and cathode polarity and the selected reverse rating.","Trace the rectification or clamp current path."],"drawingChecklist":["Label anode and cathode polarity and the selected reverse rating.","Cross-reference the rectification or clamp current path.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A Schottky diode is a distinct junction technology; its forward drop is not a fixed universal value.","facts":[{"label":"Common schematic mnemonic","value":"SBD — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"Anode and cathode polarity and the selected reverse rating"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-nexperia-diodes","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["diode","power-converter"],"artwork":"electronics-diode-schottky","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/schottky-diode","illustration":"https://eloragrid.ai/library/illustrations/schottky-diode.svg"},{"slug":"unidirectional-tvs-diode","name":"Unidirectional TVS diode","kind":"symbol","abbreviation":"TVS","aliases":["transient voltage suppressor","unidirectional suppressor"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A transient-suppression diode intended to clamp a documented surge polarity across a protected circuit.","description":["A transient-suppression diode intended to clamp a documented surge polarity across a protected circuit.","On a schematic, identify cathode orientation and the protected supply/signal node and trace the transient diversion path and return conductor. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A TVS clamping rating is not the normal working voltage; unidirectional and bidirectional devices have different polarity behaviour.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify cathode orientation and the protected supply/signal node.","Trace the transient diversion path and return conductor."],"drawingChecklist":["Label cathode orientation and the protected supply/signal node.","Cross-reference the transient diversion path and return conductor.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A TVS clamping rating is not the normal working voltage; unidirectional and bidirectional devices have different polarity behaviour.","facts":[{"label":"Common schematic mnemonic","value":"TVS — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"Cathode orientation and the protected supply/signal node"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-nexperia-tvs","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["bidirectional-breakdown-diode","diode"],"artwork":"electronics-diode-tvs","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/unidirectional-tvs-diode","illustration":"https://eloragrid.ai/library/illustrations/unidirectional-tvs-diode.svg"},{"slug":"light-emitting-diode","name":"Light-emitting diode","kind":"symbol","abbreviation":"LED","aliases":["bare LED","electroluminescent diode"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A semiconductor diode that emits light when operated with the appropriate forward current.","description":["A semiconductor diode that emits light when operated with the appropriate forward current.","On a schematic, identify anode/cathode polarity and the current-limiting circuit and trace the optical indication or emitter function. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A bare LED needs its external operating circuit; the existing LED indicator-lamp record describes an assembled indicating device.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify anode/cathode polarity and the current-limiting circuit.","Trace the optical indication or emitter function."],"drawingChecklist":["Label anode/cathode polarity and the current-limiting circuit.","Cross-reference the optical indication or emitter function.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A bare LED needs its external operating circuit; the existing LED indicator-lamp record describes an assembled indicating device.","facts":[{"label":"Common schematic mnemonic","value":"LED — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"Anode/cathode polarity and the current-limiting circuit"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-vishay-led","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["led-indicator-lamp","diode"],"artwork":"electronics-diode-led","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/light-emitting-diode","illustration":"https://eloragrid.ai/library/illustrations/light-emitting-diode.svg"},{"slug":"varactor-diode","name":"Varactor diode","kind":"symbol","abbreviation":"VAR","aliases":["varicap","tuning diode","voltage-variable capacitance diode"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A reverse-biased diode whose junction capacitance is used as a voltage-controlled circuit element.","description":["A reverse-biased diode whose junction capacitance is used as a voltage-controlled circuit element.","On a schematic, identify the tuning bias, cathode orientation and RF node and trace the tuned or phase-control circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A varactor uses junction capacitance under reverse bias; it is not an adjustable mechanical capacitor.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the tuning bias, cathode orientation and RF node.","Trace the tuned or phase-control circuit."],"drawingChecklist":["Label the tuning bias, cathode orientation and RF node.","Cross-reference the tuned or phase-control circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A varactor uses junction capacitance under reverse bias; it is not an adjustable mechanical capacitor.","facts":[{"label":"Common schematic mnemonic","value":"VAR — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The tuning bias, cathode orientation and RF node"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-nxp-varactor","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["adjustable-capacitor","diode"],"artwork":"electronics-diode-varactor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/varactor-diode","illustration":"https://eloragrid.ai/library/illustrations/varactor-diode.svg"},{"slug":"pin-diode","name":"PIN diode","kind":"symbol","abbreviation":"PIN","aliases":["RF switching diode","PIN attenuator diode"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A diode structure used in applications such as RF switching or attenuation with a documented bias circuit.","description":["A diode structure used in applications such as RF switching or attenuation with a documented bias circuit.","On a schematic, identify the anode/cathode connection and DC bias path and trace the RF signal route and isolation components. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","The letters PIN describe the semiconductor structure and do not mean a connector pin or digital input.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the anode/cathode connection and DC bias path.","Trace the RF signal route and isolation components."],"drawingChecklist":["Label the anode/cathode connection and DC bias path.","Cross-reference the RF signal route and isolation components.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"The letters PIN describe the semiconductor structure and do not mean a connector pin or digital input.","facts":[{"label":"Common schematic mnemonic","value":"PIN — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The anode/cathode connection and DC bias path"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-nxp-pin","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["diode","power-converter"],"artwork":"electronics-diode-pin","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/pin-diode","illustration":"https://eloragrid.ai/library/illustrations/pin-diode.svg"},{"slug":"npn-bipolar-transistor","name":"NPN bipolar transistor","kind":"symbol","abbreviation":"NPN","aliases":["NPN BJT","bipolar junction transistor NPN"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A bipolar transistor with base, collector and emitter terminals arranged for NPN operation.","description":["A bipolar transistor with base, collector and emitter terminals arranged for NPN operation.","On a schematic, identify the base drive, collector node and emitter reference and trace the switched or amplified collector circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","The emitter arrow distinguishes NPN from PNP in common schematics; the package pin order must still come from the selected part.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the base drive, collector node and emitter reference.","Trace the switched or amplified collector circuit."],"drawingChecklist":["Label the base drive, collector node and emitter reference.","Cross-reference the switched or amplified collector circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"The emitter arrow distinguishes NPN from PNP in common schematics; the package pin order must still come from the selected part.","facts":[{"label":"Common schematic mnemonic","value":"NPN — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The base drive, collector node and emitter reference"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-nexperia-npn","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["pnp-bipolar-transistor","diode"],"artwork":"electronics-bjt-npn","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/npn-bipolar-transistor","illustration":"https://eloragrid.ai/library/illustrations/npn-bipolar-transistor.svg"},{"slug":"pnp-bipolar-transistor","name":"PNP bipolar transistor","kind":"symbol","abbreviation":"PNP","aliases":["PNP BJT","bipolar junction transistor PNP"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A bipolar transistor with base, collector and emitter terminals arranged for PNP operation.","description":["A bipolar transistor with base, collector and emitter terminals arranged for PNP operation.","On a schematic, identify the base drive and emitter supply/reference and trace the collector load and switching or amplification path. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","PNP polarity differs from NPN; mirrored graphics do not change a transistor's type or package pin assignment.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the base drive and emitter supply/reference.","Trace the collector load and switching or amplification path."],"drawingChecklist":["Label the base drive and emitter supply/reference.","Cross-reference the collector load and switching or amplification path.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"PNP polarity differs from NPN; mirrored graphics do not change a transistor's type or package pin assignment.","facts":[{"label":"Common schematic mnemonic","value":"PNP — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The base drive and emitter supply/reference"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-nexperia-pnp","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["npn-bipolar-transistor","diode"],"artwork":"electronics-bjt-pnp","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/pnp-bipolar-transistor","illustration":"https://eloragrid.ai/library/illustrations/pnp-bipolar-transistor.svg"},{"slug":"npn-darlington-transistor","name":"NPN Darlington transistor","kind":"symbol","abbreviation":"NPN-DAR","aliases":["Darlington pair NPN","high-gain NPN pair"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Two NPN transistor stages connected as a Darlington pair to provide a combined current-amplifying device.","description":["Two NPN transistor stages connected as a Darlington pair to provide a combined current-amplifying device.","On a schematic, identify the common collector, input base and output emitter and trace the load and base-drive circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A Darlington is a compound connection rather than a single ordinary NPN transistor; its voltage drops and switching behaviour require the device data.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the common collector, input base and output emitter.","Trace the load and base-drive circuit."],"drawingChecklist":["Label the common collector, input base and output emitter.","Cross-reference the load and base-drive circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A Darlington is a compound connection rather than a single ordinary NPN transistor; its voltage drops and switching behaviour require the device data.","facts":[{"label":"Common schematic mnemonic","value":"NPN-DAR — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The common collector, input base and output emitter"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-darlington","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["npn-bipolar-transistor","diode"],"artwork":"electronics-darlington-npn","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/npn-darlington-transistor","illustration":"https://eloragrid.ai/library/illustrations/npn-darlington-transistor.svg"},{"slug":"pnp-darlington-transistor","name":"PNP Darlington transistor","kind":"symbol","abbreviation":"PNP-DAR","aliases":["Darlington pair PNP","high-gain PNP pair"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Two PNP transistor stages connected as a compound current-amplifying device.","description":["Two PNP transistor stages connected as a compound current-amplifying device.","On a schematic, identify the common collector, input base and output emitter polarity and trace the high-side or amplification circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A PNP Darlington has opposite operating polarity to an NPN pair; gain alone does not define an interchangeable device.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the common collector, input base and output emitter polarity.","Trace the high-side or amplification circuit."],"drawingChecklist":["Label the common collector, input base and output emitter polarity.","Cross-reference the high-side or amplification circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A PNP Darlington has opposite operating polarity to an NPN pair; gain alone does not define an interchangeable device.","facts":[{"label":"Common schematic mnemonic","value":"PNP-DAR — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The common collector, input base and output emitter polarity"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-darlington","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["pnp-bipolar-transistor","diode"],"artwork":"electronics-darlington-pnp","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/pnp-darlington-transistor","illustration":"https://eloragrid.ai/library/illustrations/pnp-darlington-transistor.svg"},{"slug":"n-channel-jfet","name":"N-channel JFET","kind":"symbol","abbreviation":"N-JFET","aliases":["junction FET N channel"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A junction field-effect transistor using an N-type channel controlled through a gate junction.","description":["A junction field-effect transistor using an N-type channel controlled through a gate junction.","On a schematic, identify the gate bias and drain/source connections and trace the analogue switch or amplifier signal path. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A JFET gate is a semiconductor junction, unlike the insulated gate of a MOSFET.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the gate bias and drain/source connections.","Trace the analogue switch or amplifier signal path."],"drawingChecklist":["Label the gate bias and drain/source connections.","Cross-reference the analogue switch or amplifier signal path.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A JFET gate is a semiconductor junction, unlike the insulated gate of a MOSFET.","facts":[{"label":"Common schematic mnemonic","value":"N-JFET — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The gate bias and drain/source connections"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-jfet-n","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["n-channel-enhancement-mosfet","diode"],"artwork":"electronics-jfet-n","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/n-channel-jfet","illustration":"https://eloragrid.ai/library/illustrations/n-channel-jfet.svg"},{"slug":"p-channel-jfet","name":"P-channel JFET","kind":"symbol","abbreviation":"P-JFET","aliases":["junction FET P channel"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A junction field-effect transistor using a P-type channel and the corresponding gate-bias polarity.","description":["A junction field-effect transistor using a P-type channel and the corresponding gate-bias polarity.","On a schematic, identify the gate junction polarity and drain/source references and trace the analogue control or amplifier path. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","P-channel and N-channel JFETs use opposite gate-bias polarity; the arrow and manufacturer terminal diagram resolve the type.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the gate junction polarity and drain/source references.","Trace the analogue control or amplifier path."],"drawingChecklist":["Label the gate junction polarity and drain/source references.","Cross-reference the analogue control or amplifier path.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"P-channel and N-channel JFETs use opposite gate-bias polarity; the arrow and manufacturer terminal diagram resolve the type.","facts":[{"label":"Common schematic mnemonic","value":"P-JFET — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The gate junction polarity and drain/source references"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-jfet-p","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["n-channel-jfet","diode"],"artwork":"electronics-jfet-p","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/p-channel-jfet","illustration":"https://eloragrid.ai/library/illustrations/p-channel-jfet.svg"},{"slug":"n-channel-enhancement-mosfet","name":"N-channel enhancement MOSFET","kind":"symbol","abbreviation":"N-MOS","aliases":["NMOS","N-channel MOSFET","enhancement N FET"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An insulated-gate transistor whose N-channel conduction is enabled by the documented gate-to-source drive.","description":["An insulated-gate transistor whose N-channel conduction is enabled by the documented gate-to-source drive.","On a schematic, identify gate, drain, source and any exposed bulk or Kelvin-source terminal and trace the switching path, driver return and body-diode orientation. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Enhancement mode differs from depletion mode; a MOSFET gate must not be treated as a bipolar base-current input.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify gate, drain, source and any exposed bulk or Kelvin-source terminal.","Trace the switching path, driver return and body-diode orientation."],"drawingChecklist":["Label gate, drain, source and any exposed bulk or Kelvin-source terminal.","Cross-reference the switching path, driver return and body-diode orientation.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Enhancement mode differs from depletion mode; a MOSFET gate must not be treated as a bipolar base-current input.","facts":[{"label":"Common schematic mnemonic","value":"N-MOS — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"Gate, drain, source and any exposed bulk or Kelvin-source terminal"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-nexperia-mosfet","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["n-channel-depletion-mosfet","diode"],"artwork":"electronics-mos-n-enh","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/n-channel-enhancement-mosfet","illustration":"https://eloragrid.ai/library/illustrations/n-channel-enhancement-mosfet.svg"},{"slug":"p-channel-enhancement-mosfet","name":"P-channel enhancement MOSFET","kind":"symbol","abbreviation":"P-MOS","aliases":["PMOS","P-channel MOSFET","enhancement P FET"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An insulated-gate transistor using a P-channel and the corresponding gate-to-source drive polarity.","description":["An insulated-gate transistor using a P-channel and the corresponding gate-to-source drive polarity.","On a schematic, identify the source supply, gate-drive reference and drain load and trace the controlled current path and body-diode orientation. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","P-channel gate drive is referenced to its own source; a flipped N-channel symbol is not an equivalent part.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the source supply, gate-drive reference and drain load.","Trace the controlled current path and body-diode orientation."],"drawingChecklist":["Label the source supply, gate-drive reference and drain load.","Cross-reference the controlled current path and body-diode orientation.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"P-channel gate drive is referenced to its own source; a flipped N-channel symbol is not an equivalent part.","facts":[{"label":"Common schematic mnemonic","value":"P-MOS — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The source supply, gate-drive reference and drain load"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-nexperia-mosfet","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["n-channel-enhancement-mosfet","diode"],"artwork":"electronics-mos-p-enh","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/p-channel-enhancement-mosfet","illustration":"https://eloragrid.ai/library/illustrations/p-channel-enhancement-mosfet.svg"},{"slug":"n-channel-depletion-mosfet","name":"N-channel depletion MOSFET","kind":"symbol","abbreviation":"N-DMOS","aliases":["depletion N MOSFET","normally-on MOSFET"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An N-channel insulated-gate device that conducts at zero gate-to-source voltage according to its device characteristics.","description":["An N-channel insulated-gate device that conducts at zero gate-to-source voltage according to its device characteristics.","On a schematic, identify the gate bias needed to reduce conduction and the source reference and trace the bias, current-limiting or switching circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Depletion-mode conduction at zero gate bias differs from enhancement mode and changes the circuit's default state.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the gate bias needed to reduce conduction and the source reference.","Trace the bias, current-limiting or switching circuit."],"drawingChecklist":["Label the gate bias needed to reduce conduction and the source reference.","Cross-reference the bias, current-limiting or switching circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Depletion-mode conduction at zero gate bias differs from enhancement mode and changes the circuit's default state.","facts":[{"label":"Common schematic mnemonic","value":"N-DMOS — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The gate bias needed to reduce conduction and the source reference"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-depletion-mosfet","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["n-channel-enhancement-mosfet","diode"],"artwork":"electronics-mos-n-depl","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/n-channel-depletion-mosfet","illustration":"https://eloragrid.ai/library/illustrations/n-channel-depletion-mosfet.svg"},{"slug":"insulated-gate-bipolar-transistor","name":"Insulated-gate bipolar transistor","kind":"symbol","abbreviation":"IGBT","aliases":["IGBT power transistor","insulated gate transistor"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A power transistor combining insulated-gate control with a bipolar collector-emitter conduction structure.","description":["A power transistor combining insulated-gate control with a bipolar collector-emitter conduction structure.","On a schematic, identify the gate drive, collector/emitter and any separate emitter-sense connection and trace the converter switching leg and driver return. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An IGBT is not a MOSFET with renamed pins; reverse conduction and antiparallel-diode arrangements depend on the selected device.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the gate drive, collector/emitter and any separate emitter-sense connection.","Trace the converter switching leg and driver return."],"drawingChecklist":["Label the gate drive, collector/emitter and any separate emitter-sense connection.","Cross-reference the converter switching leg and driver return.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An IGBT is not a MOSFET with renamed pins; reverse conduction and antiparallel-diode arrangements depend on the selected device.","facts":[{"label":"Common schematic mnemonic","value":"IGBT — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The gate drive, collector/emitter and any separate emitter-sense connection"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-infineon-igbt","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["n-channel-enhancement-mosfet","diode"],"artwork":"electronics-igbt","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/insulated-gate-bipolar-transistor","illustration":"https://eloragrid.ai/library/illustrations/insulated-gate-bipolar-transistor.svg"},{"slug":"mosfet-body-diode","name":"MOSFET body diode","kind":"symbol","abbreviation":"BODY-D","aliases":["intrinsic MOSFET diode","parasitic body diode"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"The intrinsic diode associated with a MOSFET's semiconductor structure, often shown within the device reference.","description":["The intrinsic diode associated with a MOSFET's semiconductor structure, often shown within the device reference.","On a schematic, identify the MOSFET type and diode direction relative to drain/source and trace the commutation or reverse-current route. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","The body diode is internal to the MOSFET; its presence does not establish that an external freewheeling diode is unnecessary.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the MOSFET type and diode direction relative to drain/source.","Trace the commutation or reverse-current route."],"drawingChecklist":["Label the MOSFET type and diode direction relative to drain/source.","Cross-reference the commutation or reverse-current route.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"The body diode is internal to the MOSFET; its presence does not establish that an external freewheeling diode is unnecessary.","facts":[{"label":"Common schematic mnemonic","value":"BODY-D — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The MOSFET type and diode direction relative to drain/source"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-nexperia-mosfet","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["n-channel-enhancement-mosfet","diode"],"artwork":"electronics-mos-body-diode","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/mosfet-body-diode","illustration":"https://eloragrid.ai/library/illustrations/mosfet-body-diode.svg"},{"slug":"gan-enhancement-hemt","name":"GaN enhancement-mode HEMT","kind":"symbol","abbreviation":"E-HEMT","aliases":["GaN FET","GaN HEMT","enhancement HEMT"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A normally-off gallium-nitride high-electron-mobility transistor used as a controlled power switch.","description":["A normally-off gallium-nitride high-electron-mobility transistor used as a controlled power switch.","On a schematic, identify the gate, drain/source and manufacturer drive/reference requirements and trace the converter power path and dedicated gate-drive circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","GaN device technology should not be inferred from an ordinary MOSFET glyph; its reverse conduction and gate limits need the device documentation.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the gate, drain/source and manufacturer drive/reference requirements.","Trace the converter power path and dedicated gate-drive circuit."],"drawingChecklist":["Label the gate, drain/source and manufacturer drive/reference requirements.","Cross-reference the converter power path and dedicated gate-drive circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"GaN device technology should not be inferred from an ordinary MOSFET glyph; its reverse conduction and gate limits need the device documentation.","facts":[{"label":"Common schematic mnemonic","value":"E-HEMT — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The gate, drain/source and manufacturer drive/reference requirements"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-infineon-gan","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["n-channel-enhancement-mosfet","diode"],"artwork":"electronics-gan","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/gan-enhancement-hemt","illustration":"https://eloragrid.ai/library/illustrations/gan-enhancement-hemt.svg"},{"slug":"integrated-gate-commutated-thyristor","name":"Integrated gate-commutated thyristor","kind":"symbol","abbreviation":"IGCT","aliases":["gate commutated thyristor","integrated GCT"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A high-power thyristor device operated with an integrated gate-unit arrangement for controlled switching.","description":["A high-power thyristor device operated with an integrated gate-unit arrangement for controlled switching.","On a schematic, identify the anode/cathode power connections and associated gate unit and trace the converter leg and gate-unit supply/control interfaces. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An IGCT includes a specific gate-drive arrangement; its abbreviation is not interchangeable with a generic SCR or GTO.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the anode/cathode power connections and associated gate unit.","Trace the converter leg and gate-unit supply/control interfaces."],"drawingChecklist":["Label the anode/cathode power connections and associated gate unit.","Cross-reference the converter leg and gate-unit supply/control interfaces.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An IGCT includes a specific gate-drive arrangement; its abbreviation is not interchangeable with a generic SCR or GTO.","facts":[{"label":"Common schematic mnemonic","value":"IGCT — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The anode/cathode power connections and associated gate unit"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-hitachi-igct","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["gate-turn-off-thyristor","diode"],"artwork":"electronics-igct","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/integrated-gate-commutated-thyristor","illustration":"https://eloragrid.ai/library/illustrations/integrated-gate-commutated-thyristor.svg"},{"slug":"npn-phototransistor","name":"NPN phototransistor","kind":"symbol","abbreviation":"PHOTO-NPN","aliases":["phototransistor","light-controlled transistor"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An NPN transistor whose collector-emitter conduction responds to incident light in the documented detector arrangement.","description":["An NPN transistor whose collector-emitter conduction responds to incident light in the documented detector arrangement.","On a schematic, identify the collector/emitter connections and any accessible base terminal and trace the optical sensing and load circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A phototransistor provides transistor action; a photodiode generates a different detector current response.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the collector/emitter connections and any accessible base terminal.","Trace the optical sensing and load circuit."],"drawingChecklist":["Label the collector/emitter connections and any accessible base terminal.","Cross-reference the optical sensing and load circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A phototransistor provides transistor action; a photodiode generates a different detector current response.","facts":[{"label":"Common schematic mnemonic","value":"PHOTO-NPN — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The collector/emitter connections and any accessible base terminal"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-vishay-optical","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["photodiode","diode"],"artwork":"electronics-photo-npn","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/npn-phototransistor","illustration":"https://eloragrid.ai/library/illustrations/npn-phototransistor.svg"},{"slug":"phototransistor-optocoupler","name":"Phototransistor optocoupler","kind":"symbol","abbreviation":"OPTO-TR","aliases":["optoisolator transistor output","optical transistor isolator"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An optical isolation component using an input light emitter and a transistor output on the isolated side.","description":["An optical isolation component using an input light emitter and a transistor output on the isolated side.","On a schematic, identify the emitter current circuit, output collector/emitter and isolation boundary and trace the isolated input status or feedback path. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Optical isolation separates electrical domains; the current-transfer behaviour and output polarity are component-specific.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the emitter current circuit, output collector/emitter and isolation boundary.","Trace the isolated input status or feedback path."],"drawingChecklist":["Label the emitter current circuit, output collector/emitter and isolation boundary.","Cross-reference the isolated input status or feedback path.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Optical isolation separates electrical domains; the current-transfer behaviour and output polarity are component-specific.","facts":[{"label":"Common schematic mnemonic","value":"OPTO-TR — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The emitter current circuit, output collector/emitter and isolation boundary"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-vishay-opto","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["solid-state-relay","diode"],"artwork":"electronics-opto-transistor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/phototransistor-optocoupler","illustration":"https://eloragrid.ai/library/illustrations/phototransistor-optocoupler.svg"},{"slug":"photodiode-optocoupler","name":"Photodiode optocoupler","kind":"symbol","abbreviation":"OPTO-PD","aliases":["linear optocoupler","photodiode isolation"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An optically coupled component using photodiode output sensing for an isolation or feedback arrangement.","description":["An optically coupled component using photodiode output sensing for an isolation or feedback arrangement.","On a schematic, identify the emitter drive, detector terminals and feedback/output channels and trace the isolated analogue signal and amplifier circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A photodiode-output optocoupler needs its detector/amplifier arrangement; it is not a transistor-output switch with the same pins.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the emitter drive, detector terminals and feedback/output channels.","Trace the isolated analogue signal and amplifier circuit."],"drawingChecklist":["Label the emitter drive, detector terminals and feedback/output channels.","Cross-reference the isolated analogue signal and amplifier circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A photodiode-output optocoupler needs its detector/amplifier arrangement; it is not a transistor-output switch with the same pins.","facts":[{"label":"Common schematic mnemonic","value":"OPTO-PD — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The emitter drive, detector terminals and feedback/output channels"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-vishay-linear-opto","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["photodiode","diode"],"artwork":"electronics-opto-photodiode","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/photodiode-optocoupler","illustration":"https://eloragrid.ai/library/illustrations/photodiode-optocoupler.svg"},{"slug":"phototriac-optocoupler","name":"Phototriac optocoupler","kind":"symbol","abbreviation":"OPTO-TRIAC","aliases":["opto triac","triac driver optocoupler"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An optical isolation device whose output is a light-triggered triac-type switching element.","description":["An optical isolation device whose output is a light-triggered triac-type switching element.","On a schematic, identify the LED input, output main terminals and any zero-cross feature and trace the external AC switching or triggering circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A phototriac driver is not necessarily the load-carrying power TRIAC; zero-cross and random-phase variants need the selected manual.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the LED input, output main terminals and any zero-cross feature.","Trace the external AC switching or triggering circuit."],"drawingChecklist":["Label the LED input, output main terminals and any zero-cross feature.","Cross-reference the external AC switching or triggering circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A phototriac driver is not necessarily the load-carrying power TRIAC; zero-cross and random-phase variants need the selected manual.","facts":[{"label":"Common schematic mnemonic","value":"OPTO-TRIAC — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The LED input, output main terminals and any zero-cross feature"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-vishay-opto","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["triac","diode"],"artwork":"electronics-opto-triac","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/phototriac-optocoupler","illustration":"https://eloragrid.ai/library/illustrations/phototriac-optocoupler.svg"},{"slug":"photovoltaic-mosfet-driver","name":"Photovoltaic MOSFET driver","kind":"symbol","abbreviation":"PV-DRV","aliases":["photovoltaic optocoupler","optically isolated MOSFET drive"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An optical component producing an isolated photovoltaic output used to drive a MOSFET gate circuit.","description":["An optical component producing an isolated photovoltaic output used to drive a MOSFET gate circuit.","On a schematic, identify the LED input, photovoltaic output polarity and gate-discharge arrangement and trace the isolated MOSFET switching circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","The photovoltaic output drives a gate circuit; this component is distinct from a solar-generator power connection.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the LED input, photovoltaic output polarity and gate-discharge arrangement.","Trace the isolated MOSFET switching circuit."],"drawingChecklist":["Label the LED input, photovoltaic output polarity and gate-discharge arrangement.","Cross-reference the isolated MOSFET switching circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"The photovoltaic output drives a gate circuit; this component is distinct from a solar-generator power connection.","facts":[{"label":"Common schematic mnemonic","value":"PV-DRV — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The LED input, photovoltaic output polarity and gate-discharge arrangement"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-vishay-pv-driver","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["n-channel-enhancement-mosfet","diode"],"artwork":"electronics-opto-pv","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/photovoltaic-mosfet-driver","illustration":"https://eloragrid.ai/library/illustrations/photovoltaic-mosfet-driver.svg"},{"slug":"capacitive-digital-isolator","name":"Capacitive digital isolator","kind":"symbol","abbreviation":"DIG-ISO","aliases":["digital isolator","capacitive isolation IC"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Transfers digital information between separately referenced electrical domains through a capacitive isolation structure.","description":["Transfers digital information between separately referenced electrical domains through a capacitive isolation structure.","On a schematic, identify the two domain supplies, channel directions and isolation boundary and trace the isolated data, enable and fault/status paths. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A digital isolator transfers logic; it does not by itself provide an isolated power supply.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the two domain supplies, channel directions and isolation boundary.","Trace the isolated data, enable and fault/status paths."],"drawingChecklist":["Label the two domain supplies, channel directions and isolation boundary.","Cross-reference the isolated data, enable and fault/status paths.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A digital isolator transfers logic; it does not by itself provide an isolated power supply.","facts":[{"label":"Common schematic mnemonic","value":"DIG-ISO — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The two domain supplies, channel directions and isolation boundary"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-digital-isolator","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["plc-digital-input","diode"],"artwork":"electronics-digital-isolator","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/capacitive-digital-isolator","illustration":"https://eloragrid.ai/library/illustrations/capacitive-digital-isolator.svg"},{"slug":"isolated-gate-driver","name":"Isolated gate driver","kind":"symbol","abbreviation":"ISO-GD","aliases":["isolated IGBT driver","isolated MOSFET driver"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Transfers a switching command across an isolation barrier and drives a power-transistor gate circuit.","description":["Transfers a switching command across an isolation barrier and drives a power-transistor gate circuit.","On a schematic, identify input/output domain supplies, driver return and fault/desaturation pins and trace the gate connection, interlock and converter protection interfaces. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A gate driver adds drive capability and device-specific supervision; it is not merely a general-purpose digital isolator.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify input/output domain supplies, driver return and fault/desaturation pins.","Trace the gate connection, interlock and converter protection interfaces."],"drawingChecklist":["Label input/output domain supplies, driver return and fault/desaturation pins.","Cross-reference the gate connection, interlock and converter protection interfaces.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A gate driver adds drive capability and device-specific supervision; it is not merely a general-purpose digital isolator.","facts":[{"label":"Common schematic mnemonic","value":"ISO-GD — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"Input/output domain supplies, driver return and fault/desaturation pins"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-isolated-driver","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["insulated-gate-bipolar-transistor","diode"],"artwork":"electronics-isolated-driver","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/isolated-gate-driver","illustration":"https://eloragrid.ai/library/illustrations/isolated-gate-driver.svg"},{"slug":"low-side-gate-driver","name":"Low-side gate driver","kind":"symbol","abbreviation":"LS-GD","aliases":["low-side MOSFET driver","ground referenced gate driver"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Provides gate-drive current for a power switch referenced to the driver's low-side return.","description":["Provides gate-drive current for a power switch referenced to the driver's low-side return.","On a schematic, identify the command input, driver supply and source/emitter return and trace the gate resistor and controlled low-side power switch. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Low-side reference is an electrical node, not an automatic protective-earth connection.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the command input, driver supply and source/emitter return.","Trace the gate resistor and controlled low-side power switch."],"drawingChecklist":["Label the command input, driver supply and source/emitter return.","Cross-reference the gate resistor and controlled low-side power switch.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Low-side reference is an electrical node, not an automatic protective-earth connection.","facts":[{"label":"Common schematic mnemonic","value":"LS-GD — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The command input, driver supply and source/emitter return"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-low-side-driver","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["n-channel-enhancement-mosfet","diode"],"artwork":"electronics-driver-low","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/low-side-gate-driver","illustration":"https://eloragrid.ai/library/illustrations/low-side-gate-driver.svg"},{"slug":"high-side-gate-driver","name":"High-side gate driver","kind":"symbol","abbreviation":"HS-GD","aliases":["floating gate driver","high-side MOSFET driver"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Drives a high-side power transistor with the output circuit referenced to its switching node.","description":["Drives a high-side power transistor with the output circuit referenced to its switching node.","On a schematic, identify the floating supply, switching-node return and control input and trace the high-side gate connection and bootstrap or isolated supply. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A high-side driver needs the correct floating reference; a low-side driver connected to ground does not replace that arrangement.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the floating supply, switching-node return and control input.","Trace the high-side gate connection and bootstrap or isolated supply."],"drawingChecklist":["Label the floating supply, switching-node return and control input.","Cross-reference the high-side gate connection and bootstrap or isolated supply.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A high-side driver needs the correct floating reference; a low-side driver connected to ground does not replace that arrangement.","facts":[{"label":"Common schematic mnemonic","value":"HS-GD — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The floating supply, switching-node return and control input"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-high-side-driver","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["low-side-gate-driver","diode"],"artwork":"electronics-driver-high","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/high-side-gate-driver","illustration":"https://eloragrid.ai/library/illustrations/high-side-gate-driver.svg"},{"slug":"bootstrap-gate-supply","name":"Bootstrap gate-drive supply","kind":"symbol","abbreviation":"BOOT","aliases":["bootstrap diode capacitor","bootstrap gate circuit"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A diode-capacitor arrangement used to supply a floating high-side gate-driver circuit under documented switching conditions.","description":["A diode-capacitor arrangement used to supply a floating high-side gate-driver circuit under documented switching conditions.","On a schematic, identify the bootstrap diode, capacitor and switching-node return and trace the driver's floating supply and charging path. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A bootstrap circuit depends on its charging opportunity; it is not a continuous independent isolated DC supply.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the bootstrap diode, capacitor and switching-node return.","Trace the driver's floating supply and charging path."],"drawingChecklist":["Label the bootstrap diode, capacitor and switching-node return.","Cross-reference the driver's floating supply and charging path.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A bootstrap circuit depends on its charging opportunity; it is not a continuous independent isolated DC supply.","facts":[{"label":"Common schematic mnemonic","value":"BOOT — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The bootstrap diode, capacitor and switching-node return"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-high-side-driver","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["high-side-gate-driver","diode"],"artwork":"electronics-bootstrap","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/bootstrap-gate-supply","illustration":"https://eloragrid.ai/library/illustrations/bootstrap-gate-supply.svg"},{"slug":"ideal-diode-controller","name":"Ideal-diode controller","kind":"symbol","abbreviation":"IDEAL-D","aliases":["active diode controller","reverse current blocking controller"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Controls an external transistor to obtain the documented low-loss directional or reverse-blocking power path.","description":["Controls an external transistor to obtain the documented low-loss directional or reverse-blocking power path.","On a schematic, identify the input/output sensing nodes and external MOSFET gate/source connections and trace the protected supply path and reverse-current control. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An ideal-diode controller is an active circuit with operating limits; the term does not mean a lossless physical diode.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the input/output sensing nodes and external MOSFET gate/source connections.","Trace the protected supply path and reverse-current control."],"drawingChecklist":["Label the input/output sensing nodes and external MOSFET gate/source connections.","Cross-reference the protected supply path and reverse-current control.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An ideal-diode controller is an active circuit with operating limits; the term does not mean a lossless physical diode.","facts":[{"label":"Common schematic mnemonic","value":"IDEAL-D — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input/output sensing nodes and external MOSFET gate/source connections"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ideal-diode","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["redundant-power-supply-decoupling-module","diode"],"artwork":"electronics-ideal-diode","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/ideal-diode-controller","illustration":"https://eloragrid.ai/library/illustrations/ideal-diode-controller.svg"},{"slug":"hot-swap-controller","name":"Hot-swap controller","kind":"symbol","abbreviation":"HOT-SWAP","aliases":["inrush control IC","live insertion controller"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Controls a power path during equipment insertion or power-up to manage the documented inrush sequence.","description":["Controls a power path during equipment insertion or power-up to manage the documented inrush sequence.","On a schematic, identify the sense resistor, external switch, timing and fault pins and trace the power-entry connection and power-good/fault interface. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Hot-swap control addresses insertion and startup behaviour; it is not a generic mechanical isolating switch.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the sense resistor, external switch, timing and fault pins.","Trace the power-entry connection and power-good/fault interface."],"drawingChecklist":["Label the sense resistor, external switch, timing and fault pins.","Cross-reference the power-entry connection and power-good/fault interface.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Hot-swap control addresses insertion and startup behaviour; it is not a generic mechanical isolating switch.","facts":[{"label":"Common schematic mnemonic","value":"HOT-SWAP — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The sense resistor, external switch, timing and fault pins"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-hot-swap","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["n-channel-enhancement-mosfet","diode"],"artwork":"electronics-hot-swap","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/hot-swap-controller","illustration":"https://eloragrid.ai/library/illustrations/hot-swap-controller.svg"},{"slug":"electronic-fuse-ic","name":"Electronic fuse IC","kind":"symbol","abbreviation":"EFUSE","aliases":["eFuse","integrated electronic fuse","electronic power path protection"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An integrated semiconductor power-path device providing the selected current-limiting and protection functions.","description":["An integrated semiconductor power-path device providing the selected current-limiting and protection functions.","On a schematic, identify the input/output power terminals, enable and fault/configuration pins and trace the protected electronic supply and status/control circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An eFuse is an electronic protection circuit; it is not the same component as a replaceable fuse or an MCB.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the input/output power terminals, enable and fault/configuration pins.","Trace the protected electronic supply and status/control circuit."],"drawingChecklist":["Label the input/output power terminals, enable and fault/configuration pins.","Cross-reference the protected electronic supply and status/control circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An eFuse is an electronic protection circuit; it is not the same component as a replaceable fuse or an MCB.","facts":[{"label":"Common schematic mnemonic","value":"EFUSE — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input/output power terminals, enable and fault/configuration pins"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-efuse","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["fuse","diode"],"artwork":"electronics-efuse","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/electronic-fuse-ic","illustration":"https://eloragrid.ai/library/illustrations/electronic-fuse-ic.svg"},{"slug":"half-bridge-power-module","name":"Half-bridge power module","kind":"symbol","abbreviation":"HB-MOD","aliases":["dual switch module","half bridge semiconductor module"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A packaged power-switch arrangement forming one half-bridge switching leg.","description":["A packaged power-switch arrangement forming one half-bridge switching leg.","On a schematic, identify positive/negative DC terminals, switching midpoint and separate gate/return pins and trace the converter phase leg and driver interfaces. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","The module topology does not define its ratings or package terminal order; the selected module drawing remains authoritative.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify positive/negative DC terminals, switching midpoint and separate gate/return pins.","Trace the converter phase leg and driver interfaces."],"drawingChecklist":["Label positive/negative DC terminals, switching midpoint and separate gate/return pins.","Cross-reference the converter phase leg and driver interfaces.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"The module topology does not define its ratings or package terminal order; the selected module drawing remains authoritative.","facts":[{"label":"Common schematic mnemonic","value":"HB-MOD — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"Positive/negative DC terminals, switching midpoint and separate gate/return pins"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-infineon-modules","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["insulated-gate-bipolar-transistor","diode"],"artwork":"electronics-half-bridge","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/half-bridge-power-module","illustration":"https://eloragrid.ai/library/illustrations/half-bridge-power-module.svg"},{"slug":"three-phase-sixpack-power-module","name":"Three-phase sixpack power module","kind":"symbol","abbreviation":"6-PACK","aliases":["six switch power module","three phase bridge module"],"category":"electronics-components","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A power module containing three switching legs for a three-phase bridge arrangement.","description":["A power module containing three switching legs for a three-phase bridge arrangement.","On a schematic, identify the DC-link terminals, three phase midpoints and six gate-drive circuits and trace the inverter phase connections and sensing/driver returns. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A sixpack describes the switching arrangement; it is not a guarantee of integrated control, isolation or protection electronics.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the DC-link terminals, three phase midpoints and six gate-drive circuits.","Trace the inverter phase connections and sensing/driver returns."],"drawingChecklist":["Label the DC-link terminals, three phase midpoints and six gate-drive circuits.","Cross-reference the inverter phase connections and sensing/driver returns.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A sixpack describes the switching arrangement; it is not a guarantee of integrated control, isolation or protection electronics.","facts":[{"label":"Common schematic mnemonic","value":"6-PACK — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The DC-link terminals, three phase midpoints and six gate-drive circuits"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-infineon-modules","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["half-bridge-power-module","diode"],"artwork":"electronics-sixpack","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-phase-sixpack-power-module","illustration":"https://eloragrid.ai/library/illustrations/three-phase-sixpack-power-module.svg"},{"slug":"logic-and-gate","name":"AND gate","kind":"symbol","abbreviation":"AND","aliases":["conjunction gate","logical AND"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A logic element whose output is true when all stated positive-logic inputs are true.","description":["A logic element whose output is true when all stated positive-logic inputs are true.","On a schematic, identify the input signal polarity and the required simultaneous conditions and trace the gate output and its destination. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An AND gate combines logical conditions; it does not specify relay-contact current capacity or a safety integrity level.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the input signal polarity and the required simultaneous conditions.","Trace the gate output and its destination."],"drawingChecklist":["Label the input signal polarity and the required simultaneous conditions.","Cross-reference the gate output and its destination.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An AND gate combines logical conditions; it does not specify relay-contact current capacity or a safety integrity level.","facts":[{"label":"Common schematic mnemonic","value":"AND — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input signal polarity and the required simultaneous conditions"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc08","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["logic-or-gate","plc-io"],"artwork":"electronics-gate-and","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/logic-and-gate","illustration":"https://eloragrid.ai/library/illustrations/logic-and-gate.svg"},{"slug":"logic-or-gate","name":"OR gate","kind":"symbol","abbreviation":"OR","aliases":["inclusive OR","logical OR"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A positive-logic element whose output is true when at least one input is true.","description":["A positive-logic element whose output is true when at least one input is true.","On a schematic, identify the input signal meanings and the inclusive-OR convention and trace the combined permissive or alarm output. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Inclusive OR differs from XOR: OR remains true when both inputs are true.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the input signal meanings and the inclusive-OR convention.","Trace the combined permissive or alarm output."],"drawingChecklist":["Label the input signal meanings and the inclusive-OR convention.","Cross-reference the combined permissive or alarm output.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Inclusive OR differs from XOR: OR remains true when both inputs are true.","facts":[{"label":"Common schematic mnemonic","value":"OR — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input signal meanings and the inclusive-OR convention"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc32","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["logic-xor-gate","plc-io"],"artwork":"electronics-gate-or","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/logic-or-gate","illustration":"https://eloragrid.ai/library/illustrations/logic-or-gate.svg"},{"slug":"logic-nand-gate","name":"NAND gate","kind":"symbol","abbreviation":"NAND","aliases":["NOT AND","inverted AND"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A logic gate that inverts the result of an AND operation.","description":["A logic gate that inverts the result of an AND operation.","On a schematic, identify the input truth states and the output inversion indication and trace the output logic state and downstream input. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","The inversion bubble concerns logical polarity; it does not identify a normally-closed physical contact.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the input truth states and the output inversion indication.","Trace the output logic state and downstream input."],"drawingChecklist":["Label the input truth states and the output inversion indication.","Cross-reference the output logic state and downstream input.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"The inversion bubble concerns logical polarity; it does not identify a normally-closed physical contact.","facts":[{"label":"Common schematic mnemonic","value":"NAND — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input truth states and the output inversion indication"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc00","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["logic-and-gate","plc-io"],"artwork":"electronics-gate-nand","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/logic-nand-gate","illustration":"https://eloragrid.ai/library/illustrations/logic-nand-gate.svg"},{"slug":"logic-nor-gate","name":"NOR gate","kind":"symbol","abbreviation":"NOR","aliases":["NOT OR","inverted OR"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A logic gate that inverts an inclusive-OR result.","description":["A logic gate that inverts an inclusive-OR result.","On a schematic, identify the input truth convention and inverted output and trace the downstream logic and reset/permissive interface. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","NOR is different from NAND because the underlying input combination is OR rather than AND.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the input truth convention and inverted output.","Trace the downstream logic and reset/permissive interface."],"drawingChecklist":["Label the input truth convention and inverted output.","Cross-reference the downstream logic and reset/permissive interface.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"NOR is different from NAND because the underlying input combination is OR rather than AND.","facts":[{"label":"Common schematic mnemonic","value":"NOR — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input truth convention and inverted output"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc02","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["logic-or-gate","plc-io"],"artwork":"electronics-gate-nor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/logic-nor-gate","illustration":"https://eloragrid.ai/library/illustrations/logic-nor-gate.svg"},{"slug":"logic-xor-gate","name":"Exclusive-OR gate","kind":"symbol","abbreviation":"XOR","aliases":["exclusive OR","inequality gate"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"For two positive-logic inputs, produces a true output when the input states differ.","description":["For two positive-logic inputs, produces a true output when the input states differ.","On a schematic, identify the two compared digital states and trace the inequality output and its control or monitoring use. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Two-input XOR is not inclusive OR; for more inputs verify whether the device implements odd parity or another specified function.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the two compared digital states.","Trace the inequality output and its control or monitoring use."],"drawingChecklist":["Label the two compared digital states.","Cross-reference the inequality output and its control or monitoring use.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Two-input XOR is not inclusive OR; for more inputs verify whether the device implements odd parity or another specified function.","facts":[{"label":"Common schematic mnemonic","value":"XOR — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The two compared digital states"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc86","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["logic-xnor-gate","plc-io"],"artwork":"electronics-gate-xor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/logic-xor-gate","illustration":"https://eloragrid.ai/library/illustrations/logic-xor-gate.svg"},{"slug":"logic-xnor-gate","name":"Exclusive-NOR gate","kind":"symbol","abbreviation":"XNOR","aliases":["exclusive NOR","equality gate"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"For two positive-logic inputs, produces a true output when the input states are equal.","description":["For two positive-logic inputs, produces a true output when the input states are equal.","On a schematic, identify the compared input signals and the output driver type and trace the equality output and any required external pull-up. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","XNOR specifies a logical function; an open-drain implementation is a separate electrical output characteristic.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the compared input signals and the output driver type.","Trace the equality output and any required external pull-up."],"drawingChecklist":["Label the compared input signals and the output driver type.","Cross-reference the equality output and any required external pull-up.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"XNOR specifies a logical function; an open-drain implementation is a separate electrical output characteristic.","facts":[{"label":"Common schematic mnemonic","value":"XNOR — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The compared input signals and the output driver type"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc266","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["logic-xor-gate","plc-io"],"artwork":"electronics-gate-xnor","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/logic-xnor-gate","illustration":"https://eloragrid.ai/library/illustrations/logic-xnor-gate.svg"},{"slug":"logic-inverter","name":"Logic inverter","kind":"symbol","abbreviation":"NOT","aliases":["NOT gate","logical inversion"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Produces the opposite logical state of its defined digital input.","description":["Produces the opposite logical state of its defined digital input.","On a schematic, identify the input/output polarity and logic supply domain and trace the inverted signal and receiving-device interface. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A digital NOT gate inverts a logic state; an inverting analogue amplifier changes a continuous signal with a gain relationship.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the input/output polarity and logic supply domain.","Trace the inverted signal and receiving-device interface."],"drawingChecklist":["Label the input/output polarity and logic supply domain.","Cross-reference the inverted signal and receiving-device interface.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A digital NOT gate inverts a logic state; an inverting analogue amplifier changes a continuous signal with a gain relationship.","facts":[{"label":"Common schematic mnemonic","value":"NOT — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input/output polarity and logic supply domain"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc04","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["logic-and-gate","plc-io"],"artwork":"electronics-gate-not","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/logic-inverter","illustration":"https://eloragrid.ai/library/illustrations/logic-inverter.svg"},{"slug":"logic-buffer","name":"Non-inverting logic buffer","kind":"symbol","abbreviation":"BUF","aliases":["digital buffer","logic driver"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Transfers a digital state through a non-inverting logic output stage.","description":["Transfers a digital state through a non-inverting logic output stage.","On a schematic, identify the input voltage domain, supply and output loading and trace the driven logic line and receiving inputs. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A buffer can provide drive capability without inversion; it is not a galvanic isolation barrier.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the input voltage domain, supply and output loading.","Trace the driven logic line and receiving inputs."],"drawingChecklist":["Label the input voltage domain, supply and output loading.","Cross-reference the driven logic line and receiving inputs.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A buffer can provide drive capability without inversion; it is not a galvanic isolation barrier.","facts":[{"label":"Common schematic mnemonic","value":"BUF — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input voltage domain, supply and output loading"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-ti-ls07","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["logic-three-state-buffer","plc-io"],"artwork":"electronics-gate-buffer","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/logic-buffer","illustration":"https://eloragrid.ai/library/illustrations/logic-buffer.svg"},{"slug":"logic-three-state-buffer","name":"Three-state logic buffer","kind":"symbol","abbreviation":"3STATE","aliases":["tri-state buffer","tristate driver","high impedance output buffer"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A digital output stage that can drive logical states or enter its documented high-impedance state.","description":["A digital output stage that can drive logical states or enter its documented high-impedance state.","On a schematic, identify the data input, output-enable polarity and shared-bus ownership and trace the output bus and disabled-state behaviour. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","High impedance differs from driving logical zero; disabled outputs still have device-specific leakage and voltage limits.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the data input, output-enable polarity and shared-bus ownership.","Trace the output bus and disabled-state behaviour."],"drawingChecklist":["Label the data input, output-enable polarity and shared-bus ownership.","Cross-reference the output bus and disabled-state behaviour.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"High impedance differs from driving logical zero; disabled outputs still have device-specific leakage and voltage limits.","facts":[{"label":"Common schematic mnemonic","value":"3STATE — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The data input, output-enable polarity and shared-bus ownership"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc125","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["logic-bus-transceiver","plc-io"],"artwork":"electronics-gate-tristate","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/logic-three-state-buffer","illustration":"https://eloragrid.ai/library/illustrations/logic-three-state-buffer.svg"},{"slug":"schmitt-trigger-inverter","name":"Schmitt-trigger inverter","kind":"symbol","abbreviation":"SCHMITT-NOT","aliases":["hysteresis inverter","Schmitt NOT"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A digital inverter with hysteresis between its input switching thresholds.","description":["A digital inverter with hysteresis between its input switching thresholds.","On a schematic, identify the input waveform, threshold convention and supply domain and trace the cleaned/inverted digital signal. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Input hysteresis and logical inversion are separate properties; neither makes an arbitrary slow input safe for every logic family.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the input waveform, threshold convention and supply domain.","Trace the cleaned/inverted digital signal."],"drawingChecklist":["Label the input waveform, threshold convention and supply domain.","Cross-reference the cleaned/inverted digital signal.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Input hysteresis and logical inversion are separate properties; neither makes an arbitrary slow input safe for every logic family.","facts":[{"label":"Common schematic mnemonic","value":"SCHMITT-NOT — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input waveform, threshold convention and supply domain"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc14","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["schmitt-trigger-buffer","plc-io"],"artwork":"electronics-gate-schmitt-not","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/schmitt-trigger-inverter","illustration":"https://eloragrid.ai/library/illustrations/schmitt-trigger-inverter.svg"},{"slug":"schmitt-trigger-buffer","name":"Schmitt-trigger buffer","kind":"symbol","abbreviation":"SCHMITT","aliases":["noninverting Schmitt trigger","hysteresis buffer"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"A non-inverting digital element with separate rising and falling input thresholds.","description":["A non-inverting digital element with separate rising and falling input thresholds.","On a schematic, identify the input signal and manufacturer hysteresis/threshold definition and trace the non-inverted digital output. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A Schmitt buffer preserves logical polarity, unlike a Schmitt-trigger inverter.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the input signal and manufacturer hysteresis/threshold definition.","Trace the non-inverted digital output."],"drawingChecklist":["Label the input signal and manufacturer hysteresis/threshold definition.","Cross-reference the non-inverted digital output.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A Schmitt buffer preserves logical polarity, unlike a Schmitt-trigger inverter.","facts":[{"label":"Common schematic mnemonic","value":"SCHMITT — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input signal and manufacturer hysteresis/threshold definition"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-ti-lvc17","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["schmitt-trigger-inverter","plc-io"],"artwork":"electronics-gate-schmitt","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/schmitt-trigger-buffer","illustration":"https://eloragrid.ai/library/illustrations/schmitt-trigger-buffer.svg"},{"slug":"positive-edge-d-flip-flop","name":"Positive-edge D flip-flop","kind":"symbol","abbreviation":"D-FF","aliases":["D type flip flop","edge triggered storage"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Captures its data input at the documented positive clock edge and retains that digital state.","description":["Captures its data input at the documented positive clock edge and retains that digital state.","On a schematic, identify the D input, clock edge and asynchronous preset/clear polarities and trace the stored Q output and any complemented output. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An edge-triggered flip-flop differs from a transparent latch; data timing relative to the clock remains essential.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the D input, clock edge and asynchronous preset/clear polarities.","Trace the stored Q output and any complemented output."],"drawingChecklist":["Label the D input, clock edge and asynchronous preset/clear polarities.","Cross-reference the stored Q output and any complemented output.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An edge-triggered flip-flop differs from a transparent latch; data timing relative to the clock remains essential.","facts":[{"label":"Common schematic mnemonic","value":"D-FF — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The D input, clock edge and asynchronous preset/clear polarities"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc74","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["transparent-d-latch","plc-io"],"artwork":"electronics-memory-dff","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/positive-edge-d-flip-flop","illustration":"https://eloragrid.ai/library/illustrations/positive-edge-d-flip-flop.svg"},{"slug":"negative-edge-jk-flip-flop","name":"Negative-edge JK flip-flop","kind":"symbol","abbreviation":"JK-FF","aliases":["J K flip flop","JK bistable"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Updates or toggles its stored state from J and K inputs at the selected negative clock edge.","description":["Updates or toggles its stored state from J and K inputs at the selected negative clock edge.","On a schematic, identify the J/K inputs, clock polarity and asynchronous controls and trace the Q/complemented outputs and feedback connections. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","JK input combinations define hold, set, reset or toggle behaviour; the clock-edge indication must match the selected device.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the J/K inputs, clock polarity and asynchronous controls.","Trace the Q/complemented outputs and feedback connections."],"drawingChecklist":["Label the J/K inputs, clock polarity and asynchronous controls.","Cross-reference the Q/complemented outputs and feedback connections.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"JK input combinations define hold, set, reset or toggle behaviour; the clock-edge indication must match the selected device.","facts":[{"label":"Common schematic mnemonic","value":"JK-FF — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The J/K inputs, clock polarity and asynchronous controls"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc112","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["positive-edge-d-flip-flop","plc-io"],"artwork":"electronics-memory-jk","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/negative-edge-jk-flip-flop","illustration":"https://eloragrid.ai/library/illustrations/negative-edge-jk-flip-flop.svg"},{"slug":"set-reset-latch","name":"Set-reset latch","kind":"symbol","abbreviation":"SR-LATCH","aliases":["S R latch","RS bistable","set reset memory"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Retains a digital state that is changed by the defined set or reset input conditions.","description":["Retains a digital state that is changed by the defined set or reset input conditions.","On a schematic, identify the set/reset active levels and any prohibited simultaneous condition and trace the stored output and reset/startup logic. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Active-high and active-low SR implementations have different input conventions; a bare SR label does not resolve simultaneous-input behaviour.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the set/reset active levels and any prohibited simultaneous condition.","Trace the stored output and reset/startup logic."],"drawingChecklist":["Label the set/reset active levels and any prohibited simultaneous condition.","Cross-reference the stored output and reset/startup logic.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Active-high and active-low SR implementations have different input conventions; a bare SR label does not resolve simultaneous-input behaviour.","facts":[{"label":"Common schematic mnemonic","value":"SR-LATCH — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The set/reset active levels and any prohibited simultaneous condition"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-ls279","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["transparent-d-latch","plc-io"],"artwork":"electronics-memory-sr","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/set-reset-latch","illustration":"https://eloragrid.ai/library/illustrations/set-reset-latch.svg"},{"slug":"transparent-d-latch","name":"Transparent D latch","kind":"symbol","abbreviation":"D-LATCH","aliases":["level sensitive latch","transparent data latch"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Follows the input data while its latch-enable condition is active and retains it when that condition ends.","description":["Follows the input data while its latch-enable condition is active and retains it when that condition ends.","On a schematic, identify the data input, latch-enable level and output-enable control and trace the retained data outputs and receiving circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A transparent latch is level-sensitive; a D flip-flop captures data at a defined clock transition.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the data input, latch-enable level and output-enable control.","Trace the retained data outputs and receiving circuit."],"drawingChecklist":["Label the data input, latch-enable level and output-enable control.","Cross-reference the retained data outputs and receiving circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A transparent latch is level-sensitive; a D flip-flop captures data at a defined clock transition.","facts":[{"label":"Common schematic mnemonic","value":"D-LATCH — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The data input, latch-enable level and output-enable control"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc373","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["positive-edge-d-flip-flop","plc-io"],"artwork":"electronics-memory-latch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/transparent-d-latch","illustration":"https://eloragrid.ai/library/illustrations/transparent-d-latch.svg"},{"slug":"serial-in-parallel-out-register","name":"Serial-in parallel-out register","kind":"symbol","abbreviation":"SIPO","aliases":["serial to parallel register","SIPO shift register"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Shifts serial input data through storage stages to parallel outputs at the documented clock events.","description":["Shifts serial input data through storage stages to parallel outputs at the documented clock events.","On a schematic, identify the serial input, shift clock and clear control and trace the parallel output bits and their bit-order mapping. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A SIPO register exposes its shifted bits; an output-latched register can retain a separate displayed output word.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the serial input, shift clock and clear control.","Trace the parallel output bits and their bit-order mapping."],"drawingChecklist":["Label the serial input, shift clock and clear control.","Cross-reference the parallel output bits and their bit-order mapping.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A SIPO register exposes its shifted bits; an output-latched register can retain a separate displayed output word.","facts":[{"label":"Common schematic mnemonic","value":"SIPO — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The serial input, shift clock and clear control"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc164","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["latched-shift-register","plc-io"],"artwork":"electronics-memory-sipo","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/serial-in-parallel-out-register","illustration":"https://eloragrid.ai/library/illustrations/serial-in-parallel-out-register.svg"},{"slug":"parallel-in-serial-out-register","name":"Parallel-in serial-out register","kind":"symbol","abbreviation":"PISO","aliases":["parallel to serial register","PISO shift register"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Loads a parallel word and presents its bits through a serial shift output.","description":["Loads a parallel word and presents its bits through a serial shift output.","On a schematic, identify the parallel inputs, load control and shift clock and trace the serial data output and bit-order convention. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","PISO serialises a parallel state; it is not the reverse pin connection of an arbitrary SIPO part.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the parallel inputs, load control and shift clock.","Trace the serial data output and bit-order convention."],"drawingChecklist":["Label the parallel inputs, load control and shift clock.","Cross-reference the serial data output and bit-order convention.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"PISO serialises a parallel state; it is not the reverse pin connection of an arbitrary SIPO part.","facts":[{"label":"Common schematic mnemonic","value":"PISO — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The parallel inputs, load control and shift clock"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc165","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["serial-in-parallel-out-register","plc-io"],"artwork":"electronics-memory-piso","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/parallel-in-serial-out-register","illustration":"https://eloragrid.ai/library/illustrations/parallel-in-serial-out-register.svg"},{"slug":"latched-shift-register","name":"Shift register with output latch","kind":"symbol","abbreviation":"SHIFT-LATCH","aliases":["serial output latch","output registered shift register"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Combines a serial shift path with a separate output-storage stage.","description":["Combines a serial shift path with a separate output-storage stage.","On a schematic, identify the shift clock, output-latch clock and output-enable polarity and trace the output word and serial-cascade connection. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","The shift clock changes internal shift storage; a separate latch action updates the retained output word.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the shift clock, output-latch clock and output-enable polarity.","Trace the output word and serial-cascade connection."],"drawingChecklist":["Label the shift clock, output-latch clock and output-enable polarity.","Cross-reference the output word and serial-cascade connection.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"The shift clock changes internal shift storage; a separate latch action updates the retained output word.","facts":[{"label":"Common schematic mnemonic","value":"SHIFT-LATCH — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The shift clock, output-latch clock and output-enable polarity"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc595","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["serial-in-parallel-out-register","plc-io"],"artwork":"electronics-memory-shift-latch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/latched-shift-register","illustration":"https://eloragrid.ai/library/illustrations/latched-shift-register.svg"},{"slug":"ripple-binary-counter","name":"Ripple binary counter","kind":"symbol","abbreviation":"CTR-RIP","aliases":["asynchronous binary counter","ripple counter"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Counts clock events through cascaded storage stages whose output changes do not occur simultaneously.","description":["Counts clock events through cascaded storage stages whose output changes do not occur simultaneously.","On a schematic, identify the count input, clock polarity and clear input and trace the binary outputs and any decoded control signals. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Ripple transitions can briefly expose intermediate combinations; synchronous counters have a different update arrangement.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the count input, clock polarity and clear input.","Trace the binary outputs and any decoded control signals."],"drawingChecklist":["Label the count input, clock polarity and clear input.","Cross-reference the binary outputs and any decoded control signals.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Ripple transitions can briefly expose intermediate combinations; synchronous counters have a different update arrangement.","facts":[{"label":"Common schematic mnemonic","value":"CTR-RIP — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The count input, clock polarity and clear input"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc393","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["synchronous-binary-counter","plc-io"],"artwork":"electronics-memory-ripple","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/ripple-binary-counter","illustration":"https://eloragrid.ai/library/illustrations/ripple-binary-counter.svg"},{"slug":"synchronous-binary-counter","name":"Synchronous binary counter","kind":"symbol","abbreviation":"CTR-SYNC","aliases":["synchronous counter","binary count register"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Updates its binary count from a common clock with the documented count-enable, load and clear controls.","description":["Updates its binary count from a common clock with the documented count-enable, load and clear controls.","On a schematic, identify the common clock, enables, load data and reset timing and trace the count outputs and carry/cascade signal. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Synchronous operation does not remove setup/hold and output-delay requirements; reset can be synchronous or asynchronous depending on the part.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the common clock, enables, load data and reset timing.","Trace the count outputs and carry/cascade signal."],"drawingChecklist":["Label the common clock, enables, load data and reset timing.","Cross-reference the count outputs and carry/cascade signal.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Synchronous operation does not remove setup/hold and output-delay requirements; reset can be synchronous or asynchronous depending on the part.","facts":[{"label":"Common schematic mnemonic","value":"CTR-SYNC — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The common clock, enables, load data and reset timing"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc163","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["ripple-binary-counter","plc-io"],"artwork":"electronics-memory-counter","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/synchronous-binary-counter","illustration":"https://eloragrid.ai/library/illustrations/synchronous-binary-counter.svg"},{"slug":"one-hot-decade-counter","name":"Decoded decade counter","kind":"symbol","abbreviation":"DECADE","aliases":["one hot decade counter","Johnson decade counter"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Advances a decoded output sequence through the documented ten-state counter arrangement.","description":["Advances a decoded output sequence through the documented ten-state counter arrangement.","On a schematic, identify the clock, inhibit and reset controls and trace the decoded outputs and carry/cascade path. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Decoded decade outputs differ from a binary-coded ten-state word; the selected device's sequence table defines the actual mapping.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the clock, inhibit and reset controls.","Trace the decoded outputs and carry/cascade path."],"drawingChecklist":["Label the clock, inhibit and reset controls.","Cross-reference the decoded outputs and carry/cascade path.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Decoded decade outputs differ from a binary-coded ten-state word; the selected device's sequence table defines the actual mapping.","facts":[{"label":"Common schematic mnemonic","value":"DECADE — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The clock, inhibit and reset controls"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-cd4017","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["synchronous-binary-counter","plc-io"],"artwork":"electronics-memory-decade","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/one-hot-decade-counter","illustration":"https://eloragrid.ai/library/illustrations/one-hot-decade-counter.svg"},{"slug":"retriggerable-monostable","name":"Retriggerable monostable","kind":"symbol","abbreviation":"ONE-SHOT","aliases":["one shot","retriggerable pulse timer"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Produces a timed output pulse that can be extended by a qualifying retrigger condition.","description":["Produces a timed output pulse that can be extended by a qualifying retrigger condition.","On a schematic, identify the trigger polarities, clear input and timing components and trace the pulse/complemented outputs and timed control use. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A retriggerable one-shot differs from a non-retriggerable pulse generator or a free-running oscillator.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the trigger polarities, clear input and timing components.","Trace the pulse/complemented outputs and timed control use."],"drawingChecklist":["Label the trigger polarities, clear input and timing components.","Cross-reference the pulse/complemented outputs and timed control use.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A retriggerable one-shot differs from a non-retriggerable pulse generator or a free-running oscillator.","facts":[{"label":"Common schematic mnemonic","value":"ONE-SHOT — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The trigger polarities, clear input and timing components"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc123","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["watchdog-timer","plc-io"],"artwork":"electronics-logic-monostable","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/retriggerable-monostable","illustration":"https://eloragrid.ai/library/illustrations/retriggerable-monostable.svg"},{"slug":"binary-decoder-demultiplexer","name":"Binary decoder / demultiplexer","kind":"symbol","abbreviation":"DEC","aliases":["binary decoder","demultiplexer","one of many selection"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Uses binary selection and enable conditions to activate the documented selected output.","description":["Uses binary selection and enable conditions to activate the documented selected output.","On a schematic, identify the binary address inputs, enable polarities and output active level and trace the selected output channels and destination mapping. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A decoder and a demultiplexer can share a device implementation; this record combines those uses rather than counting the same hardware twice.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the binary address inputs, enable polarities and output active level.","Trace the selected output channels and destination mapping."],"drawingChecklist":["Label the binary address inputs, enable polarities and output active level.","Cross-reference the selected output channels and destination mapping.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A decoder and a demultiplexer can share a device implementation; this record combines those uses rather than counting the same hardware twice.","facts":[{"label":"Common schematic mnemonic","value":"DEC — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The binary address inputs, enable polarities and output active level"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc138","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["digital-multiplexer","plc-io"],"artwork":"electronics-logic-decoder","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/binary-decoder-demultiplexer","illustration":"https://eloragrid.ai/library/illustrations/binary-decoder-demultiplexer.svg"},{"slug":"priority-encoder","name":"Priority encoder","kind":"symbol","abbreviation":"ENC-PRI","aliases":["digital priority encoder","input priority coding"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Encodes the highest-priority qualifying input into the specified binary output word.","description":["Encodes the highest-priority qualifying input into the specified binary output word.","On a schematic, identify the input active levels, priority order and enable controls and trace the encoded outputs and validity/cascade signals. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A priority encoder resolves simultaneous inputs using its specified order; a basic encoder does not necessarily resolve them.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the input active levels, priority order and enable controls.","Trace the encoded outputs and validity/cascade signals."],"drawingChecklist":["Label the input active levels, priority order and enable controls.","Cross-reference the encoded outputs and validity/cascade signals.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A priority encoder resolves simultaneous inputs using its specified order; a basic encoder does not necessarily resolve them.","facts":[{"label":"Common schematic mnemonic","value":"ENC-PRI — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input active levels, priority order and enable controls"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc148","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["binary-decoder-demultiplexer","plc-io"],"artwork":"electronics-logic-encoder","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/priority-encoder","illustration":"https://eloragrid.ai/library/illustrations/priority-encoder.svg"},{"slug":"digital-multiplexer","name":"Digital multiplexer","kind":"symbol","abbreviation":"MUX","aliases":["digital data selector","logic multiplexer"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Selects one of several digital inputs for the documented output according to its selection controls.","description":["Selects one of several digital inputs for the documented output according to its selection controls.","On a schematic, identify the data inputs, selector bits and enable polarity and trace the selected digital output and any complementary output. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A digital multiplexer processes logic levels; an analogue multiplexer passes a continuous signal within its electrical limits.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the data inputs, selector bits and enable polarity.","Trace the selected digital output and any complementary output."],"drawingChecklist":["Label the data inputs, selector bits and enable polarity.","Cross-reference the selected digital output and any complementary output.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A digital multiplexer processes logic levels; an analogue multiplexer passes a continuous signal within its electrical limits.","facts":[{"label":"Common schematic mnemonic","value":"MUX — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The data inputs, selector bits and enable polarity"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc151","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["analog-multiplexer","plc-io"],"artwork":"electronics-logic-mux","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/digital-multiplexer","illustration":"https://eloragrid.ai/library/illustrations/digital-multiplexer.svg"},{"slug":"digital-magnitude-comparator","name":"Digital magnitude comparator","kind":"symbol","abbreviation":"MAG-COMP","aliases":["binary comparator","digital word comparison"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Compares two digital words to provide the specified equality and magnitude indications.","description":["Compares two digital words to provide the specified equality and magnitude indications.","On a schematic, identify the two word buses, bit significance and cascade inputs and trace the equal, greater-than and less-than outputs. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Digital word comparison differs from an analogue voltage comparator, even though both can use a comparison block in a diagram.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the two word buses, bit significance and cascade inputs.","Trace the equal, greater-than and less-than outputs."],"drawingChecklist":["Label the two word buses, bit significance and cascade inputs.","Cross-reference the equal, greater-than and less-than outputs.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Digital word comparison differs from an analogue voltage comparator, even though both can use a comparison block in a diagram.","facts":[{"label":"Common schematic mnemonic","value":"MAG-COMP — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The two word buses, bit significance and cascade inputs"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc85","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["voltage-comparator","plc-io"],"artwork":"electronics-logic-comparator","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/digital-magnitude-comparator","illustration":"https://eloragrid.ai/library/illustrations/digital-magnitude-comparator.svg"},{"slug":"binary-full-adder","name":"Binary full adder","kind":"symbol","abbreviation":"ADD","aliases":["binary adder","full adder","digital addition"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Adds binary input words with the documented carry-in and produces sum and carry outputs.","description":["Adds binary input words with the documented carry-in and produces sum and carry outputs.","On a schematic, identify the input word buses, bit order and carry-in and trace the sum word and carry-out/cascade connection. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A full adder performs arithmetic; an OR gate cannot replace its sum/carry relationships.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the input word buses, bit order and carry-in.","Trace the sum word and carry-out/cascade connection."],"drawingChecklist":["Label the input word buses, bit order and carry-in.","Cross-reference the sum word and carry-out/cascade connection.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A full adder performs arithmetic; an OR gate cannot replace its sum/carry relationships.","facts":[{"label":"Common schematic mnemonic","value":"ADD — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input word buses, bit order and carry-in"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc283","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["logic-xor-gate","plc-io"],"artwork":"electronics-logic-adder","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/binary-full-adder","illustration":"https://eloragrid.ai/library/illustrations/binary-full-adder.svg"},{"slug":"logic-bus-transceiver","name":"Logic bus transceiver","kind":"symbol","abbreviation":"BUS-TR","aliases":["bidirectional digital buffer","bus transceiver"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Drives data between two digital buses according to the selected direction and enable conditions.","description":["Drives data between two digital buses according to the selected direction and enable conditions.","On a schematic, identify the A/B bus domains, direction input and output-enable polarity and trace the active direction and high-impedance bus behaviour. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A transceiver supports a defined direction-control arrangement; it is not automatically a protocol controller or an isolator.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the A/B bus domains, direction input and output-enable polarity.","Trace the active direction and high-impedance bus behaviour."],"drawingChecklist":["Label the A/B bus domains, direction input and output-enable polarity.","Cross-reference the active direction and high-impedance bus behaviour.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A transceiver supports a defined direction-control arrangement; it is not automatically a protocol controller or an isolator.","facts":[{"label":"Common schematic mnemonic","value":"BUS-TR — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The A/B bus domains, direction input and output-enable polarity"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-hc245","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["logic-three-state-buffer","plc-io"],"artwork":"electronics-logic-transceiver","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/logic-bus-transceiver","illustration":"https://eloragrid.ai/library/illustrations/logic-bus-transceiver.svg"},{"slug":"logic-voltage-level-translator","name":"Logic voltage-level translator","kind":"symbol","abbreviation":"LEVEL","aliases":["voltage translator","logic level shifter"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Transfers digital information between the documented logic-voltage domains.","description":["Transfers digital information between the documented logic-voltage domains.","On a schematic, identify the two supplies, channel direction and power-sequencing requirements and trace the translated data and receiving-device interface. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Voltage translation changes logic-domain compatibility; it does not imply galvanic isolation or arbitrary input tolerance.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the two supplies, channel direction and power-sequencing requirements.","Trace the translated data and receiving-device interface."],"drawingChecklist":["Label the two supplies, channel direction and power-sequencing requirements.","Cross-reference the translated data and receiving-device interface.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Voltage translation changes logic-domain compatibility; it does not imply galvanic isolation or arbitrary input tolerance.","facts":[{"label":"Common schematic mnemonic","value":"LEVEL — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The two supplies, channel direction and power-sequencing requirements"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-lvc1t45","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["capacitive-digital-isolator","plc-io"],"artwork":"electronics-logic-level","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/logic-voltage-level-translator","illustration":"https://eloragrid.ai/library/illustrations/logic-voltage-level-translator.svg"},{"slug":"open-collector-buffer","name":"Open-collector buffer","kind":"symbol","abbreviation":"OC-BUF","aliases":["open collector logic","pull up output driver"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Provides a logic output through a transistor pull-down stage requiring the documented external load or pull-up.","description":["Provides a logic output through a transistor pull-down stage requiring the documented external load or pull-up.","On a schematic, identify the logic supply, collector output and pull-up/load supply and trace the wired output signal and receiving input. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An open collector can sink current under its limits; it does not actively drive the high state like a push-pull output.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the logic supply, collector output and pull-up/load supply.","Trace the wired output signal and receiving input."],"drawingChecklist":["Label the logic supply, collector output and pull-up/load supply.","Cross-reference the wired output signal and receiving input.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An open collector can sink current under its limits; it does not actively drive the high state like a push-pull output.","facts":[{"label":"Common schematic mnemonic","value":"OC-BUF — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The logic supply, collector output and pull-up/load supply"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-ls07","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["logic-three-state-buffer","plc-io"],"artwork":"electronics-logic-open-collector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/open-collector-buffer","illustration":"https://eloragrid.ai/library/illustrations/open-collector-buffer.svg"},{"slug":"parity-generator-checker","name":"Parity generator / checker","kind":"symbol","abbreviation":"PARITY","aliases":["odd even parity","parity check logic"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Computes a parity indication from the defined digital input word.","description":["Computes a parity indication from the defined digital input word.","On a schematic, identify the data width, odd/even convention and cascade mapping and trace the parity output and check/alarm interface. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A parity check detects a defined class of bit errors; it is not a complete CRC, data-integrity or safety protocol.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the data width, odd/even convention and cascade mapping.","Trace the parity output and check/alarm interface."],"drawingChecklist":["Label the data width, odd/even convention and cascade mapping.","Cross-reference the parity output and check/alarm interface.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A parity check detects a defined class of bit errors; it is not a complete CRC, data-integrity or safety protocol.","facts":[{"label":"Common schematic mnemonic","value":"PARITY — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The data width, odd/even convention and cascade mapping"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-ls280","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["logic-xor-gate","plc-io"],"artwork":"electronics-logic-parity","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/parity-generator-checker","illustration":"https://eloragrid.ai/library/illustrations/parity-generator-checker.svg"},{"slug":"phase-locked-loop","name":"Phase-locked loop","kind":"symbol","abbreviation":"PLL","aliases":["phase locked loop","frequency tracking loop"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Controls an oscillator through a phase-comparison feedback arrangement to follow the documented reference.","description":["Controls an oscillator through a phase-comparison feedback arrangement to follow the documented reference.","On a schematic, identify the reference input, phase detector, loop filter and VCO control and trace the oscillator output, lock indication and feedback divider. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A PLL is a closed control loop; a VCO alone has no phase-comparison feedback function.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the reference input, phase detector, loop filter and VCO control.","Trace the oscillator output, lock indication and feedback divider."],"drawingChecklist":["Label the reference input, phase detector, loop filter and VCO control.","Cross-reference the oscillator output, lock indication and feedback divider.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A PLL is a closed control loop; a VCO alone has no phase-comparison feedback function.","facts":[{"label":"Common schematic mnemonic","value":"PLL — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The reference input, phase detector, loop filter and VCO control"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-cd4046","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["voltage-controlled-oscillator","plc-io"],"artwork":"electronics-logic-pll","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/phase-locked-loop","illustration":"https://eloragrid.ai/library/illustrations/phase-locked-loop.svg"},{"slug":"voltage-controlled-oscillator","name":"Voltage-controlled oscillator","kind":"symbol","abbreviation":"VCO","aliases":["voltage to frequency oscillator","controlled oscillator"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Generates an oscillating output whose frequency responds to the documented control voltage.","description":["Generates an oscillating output whose frequency responds to the documented control voltage.","On a schematic, identify the control input, supply/reference and timing components and trace the oscillator output and downstream clock or modulation circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A VCO is a signal generator; the term does not mean a power-frequency generator connected to a busbar.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the control input, supply/reference and timing components.","Trace the oscillator output and downstream clock or modulation circuit."],"drawingChecklist":["Label the control input, supply/reference and timing components.","Cross-reference the oscillator output and downstream clock or modulation circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A VCO is a signal generator; the term does not mean a power-frequency generator connected to a busbar.","facts":[{"label":"Common schematic mnemonic","value":"VCO — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The control input, supply/reference and timing components"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-cd4046","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["phase-locked-loop","plc-io"],"artwork":"electronics-logic-vco","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/voltage-controlled-oscillator","illustration":"https://eloragrid.ai/library/illustrations/voltage-controlled-oscillator.svg"},{"slug":"clock-generator","name":"Clock generator","kind":"symbol","abbreviation":"CLK-GEN","aliases":["timing clock IC","clock source block"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Provides the documented clock signal or signals used by digital circuitry.","description":["Provides the documented clock signal or signals used by digital circuitry.","On a schematic, identify the reference oscillator/input, supply and enable/configuration pins and trace the clock outputs and receiving clock domains. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A clock-generator block does not define frequency, jitter or electrical interface without its selected component documentation.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the reference oscillator/input, supply and enable/configuration pins.","Trace the clock outputs and receiving clock domains."],"drawingChecklist":["Label the reference oscillator/input, supply and enable/configuration pins.","Cross-reference the clock outputs and receiving clock domains.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A clock-generator block does not define frequency, jitter or electrical interface without its selected component documentation.","facts":[{"label":"Common schematic mnemonic","value":"CLK-GEN — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The reference oscillator/input, supply and enable/configuration pins"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-clock","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["positive-edge-d-flip-flop","plc-io"],"artwork":"electronics-logic-clock","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/clock-generator","illustration":"https://eloragrid.ai/library/illustrations/clock-generator.svg"},{"slug":"watchdog-timer","name":"Watchdog timer","kind":"symbol","abbreviation":"WDT","aliases":["watchdog IC","processor timeout monitor"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Supervises a qualifying activity signal and operates its output when the documented watchdog timing condition is violated.","description":["Supervises a qualifying activity signal and operates its output when the documented watchdog timing condition is violated.","On a schematic, identify the watchdog input, enable and timeout configuration and trace the reset/fault output and supervised controller. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A watchdog supervises activity timing; it does not prove that the processor's control algorithm is correct.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the watchdog input, enable and timeout configuration.","Trace the reset/fault output and supervised controller."],"drawingChecklist":["Label the watchdog input, enable and timeout configuration.","Cross-reference the reset/fault output and supervised controller.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A watchdog supervises activity timing; it does not prove that the processor's control algorithm is correct.","facts":[{"label":"Common schematic mnemonic","value":"WDT — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The watchdog input, enable and timeout configuration"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-watchdog","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["retriggerable-monostable","plc-io"],"artwork":"electronics-logic-watchdog","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/watchdog-timer","illustration":"https://eloragrid.ai/library/illustrations/watchdog-timer.svg"},{"slug":"operational-amplifier","name":"Operational amplifier","kind":"symbol","abbreviation":"OP-AMP","aliases":["op amp","voltage feedback amplifier"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An analogue amplifier represented by inverting and non-inverting inputs, an output and its supply connections.","description":["An analogue amplifier represented by inverting and non-inverting inputs, an output and its supply connections.","On a schematic, identify the plus/minus input roles, power rails and feedback network and trace the amplified signal and output load. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An op amp is designed for its documented amplifier behaviour; it is not interchangeable with a dedicated fast voltage comparator.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the plus/minus input roles, power rails and feedback network.","Trace the amplified signal and output load."],"drawingChecklist":["Label the plus/minus input roles, power rails and feedback network.","Cross-reference the amplified signal and output load.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An op amp is designed for its documented amplifier behaviour; it is not interchangeable with a dedicated fast voltage comparator.","facts":[{"label":"Common schematic mnemonic","value":"OP-AMP — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The plus/minus input roles, power rails and feedback network"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-adi-opamp","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["voltage-comparator","plc-io"],"artwork":"electronics-amp-opamp","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/operational-amplifier","illustration":"https://eloragrid.ai/library/illustrations/operational-amplifier.svg"},{"slug":"voltage-comparator","name":"Voltage comparator","kind":"symbol","abbreviation":"COMP","aliases":["analogue comparator","analog voltage comparator"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Compares two analogue input voltages and produces the documented output-state indication.","description":["Compares two analogue input voltages and produces the documented output-state indication.","On a schematic, identify the plus/minus voltage inputs, hysteresis and output driver type and trace the logic or switching output and any required pull-up. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A comparator output conveys a comparison result; an op amp operated without feedback is not universally an appropriate substitute.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the plus/minus voltage inputs, hysteresis and output driver type.","Trace the logic or switching output and any required pull-up."],"drawingChecklist":["Label the plus/minus voltage inputs, hysteresis and output driver type.","Cross-reference the logic or switching output and any required pull-up.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A comparator output conveys a comparison result; an op amp operated without feedback is not universally an appropriate substitute.","facts":[{"label":"Common schematic mnemonic","value":"COMP — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The plus/minus voltage inputs, hysteresis and output driver type"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-adi-comparator","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["operational-amplifier","plc-io"],"artwork":"electronics-amp-comparator","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/voltage-comparator","illustration":"https://eloragrid.ai/library/illustrations/voltage-comparator.svg"},{"slug":"instrumentation-amplifier","name":"Instrumentation amplifier","kind":"symbol","abbreviation":"INA","aliases":["instrument amplifier","differential instrumentation amp"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Amplifies a differential input signal using an instrumentation-amplifier input and gain arrangement.","description":["Amplifies a differential input signal using an instrumentation-amplifier input and gain arrangement.","On a schematic, identify the two measurement inputs, gain-setting terminals and output reference and trace the conditioned measurement signal and receiving converter. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An instrumentation amplifier and a basic difference amplifier have different input and gain arrangements; the selected device defines their capabilities.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the two measurement inputs, gain-setting terminals and output reference.","Trace the conditioned measurement signal and receiving converter."],"drawingChecklist":["Label the two measurement inputs, gain-setting terminals and output reference.","Cross-reference the conditioned measurement signal and receiving converter.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An instrumentation amplifier and a basic difference amplifier have different input and gain arrangements; the selected device defines their capabilities.","facts":[{"label":"Common schematic mnemonic","value":"INA — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The two measurement inputs, gain-setting terminals and output reference"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-adi-ina","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["difference-amplifier","plc-io"],"artwork":"electronics-amp-instrumentation","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/instrumentation-amplifier","illustration":"https://eloragrid.ai/library/illustrations/instrumentation-amplifier.svg"},{"slug":"difference-amplifier","name":"Difference amplifier","kind":"symbol","abbreviation":"DIFF-AMP","aliases":["differential amplifier","subtractor amplifier"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Produces an analogue output related to the difference between two input signals with the documented gain/reference arrangement.","description":["Produces an analogue output related to the difference between two input signals with the documented gain/reference arrangement.","On a schematic, identify the two inputs, resistor-ratio or integrated-gain definition and reference terminal and trace the difference signal and its receiving circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A difference amplifier rejects common input content according to its implementation; it does not establish galvanic isolation.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the two inputs, resistor-ratio or integrated-gain definition and reference terminal.","Trace the difference signal and its receiving circuit."],"drawingChecklist":["Label the two inputs, resistor-ratio or integrated-gain definition and reference terminal.","Cross-reference the difference signal and its receiving circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A difference amplifier rejects common input content according to its implementation; it does not establish galvanic isolation.","facts":[{"label":"Common schematic mnemonic","value":"DIFF-AMP — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The two inputs, resistor-ratio or integrated-gain definition and reference terminal"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-adi-difference","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["instrumentation-amplifier","plc-io"],"artwork":"electronics-amp-difference","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/difference-amplifier","illustration":"https://eloragrid.ai/library/illustrations/difference-amplifier.svg"},{"slug":"fully-differential-amplifier","name":"Fully differential amplifier","kind":"symbol","abbreviation":"FDA","aliases":["differential output amplifier","balanced amplifier"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Processes an analogue input to provide two complementary output signals around a defined common-mode level.","description":["Processes an analogue input to provide two complementary output signals around a defined common-mode level.","On a schematic, identify the input network, output common-mode control and two output terminals and trace the differential output pair and ADC/load interface. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Two output terminals distinguish a fully differential amplifier from a single-ended-output difference amplifier.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the input network, output common-mode control and two output terminals.","Trace the differential output pair and ADC/load interface."],"drawingChecklist":["Label the input network, output common-mode control and two output terminals.","Cross-reference the differential output pair and ADC/load interface.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Two output terminals distinguish a fully differential amplifier from a single-ended-output difference amplifier.","facts":[{"label":"Common schematic mnemonic","value":"FDA — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input network, output common-mode control and two output terminals"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-fda","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["difference-amplifier","plc-io"],"artwork":"electronics-amp-fda","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/fully-differential-amplifier","illustration":"https://eloragrid.ai/library/illustrations/fully-differential-amplifier.svg"},{"slug":"current-sense-amplifier","name":"Current-sense amplifier","kind":"symbol","abbreviation":"CSA","aliases":["shunt amplifier","current measurement amplifier"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Amplifies a voltage associated with a current-sensing shunt using the selected measurement-input arrangement.","description":["Amplifies a voltage associated with a current-sensing shunt using the selected measurement-input arrangement.","On a schematic, identify the shunt polarity, input common-mode reference and gain definition and trace the current-related output and ADC or protection circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A current-sense amplifier measures a shunt voltage; it does not replace the shunt or establish an isolated current-transformer connection.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the shunt polarity, input common-mode reference and gain definition.","Trace the current-related output and ADC or protection circuit."],"drawingChecklist":["Label the shunt polarity, input common-mode reference and gain definition.","Cross-reference the current-related output and ADC or protection circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A current-sense amplifier measures a shunt voltage; it does not replace the shunt or establish an isolated current-transformer connection.","facts":[{"label":"Common schematic mnemonic","value":"CSA — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The shunt polarity, input common-mode reference and gain definition"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-adi-current-sense","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["current-measuring-shunt","plc-io"],"artwork":"electronics-amp-current-sense","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/current-sense-amplifier","illustration":"https://eloragrid.ai/library/illustrations/current-sense-amplifier.svg"},{"slug":"isolation-amplifier","name":"Isolation amplifier","kind":"symbol","abbreviation":"ISO-AMP","aliases":["isolated amplifier","galvanically isolated analogue amplifier"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Transfers an analogue measurement across the documented electrical isolation boundary.","description":["Transfers an analogue measurement across the documented electrical isolation boundary.","On a schematic, identify the two supply domains, input reference and output interface and trace the isolated measurement signal and downstream processing. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An isolation amplifier has an analogue signal-transfer role; a digital isolator transfers encoded logic rather than a generic continuous voltage.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the two supply domains, input reference and output interface.","Trace the isolated measurement signal and downstream processing."],"drawingChecklist":["Label the two supply domains, input reference and output interface.","Cross-reference the isolated measurement signal and downstream processing.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An isolation amplifier has an analogue signal-transfer role; a digital isolator transfers encoded logic rather than a generic continuous voltage.","facts":[{"label":"Common schematic mnemonic","value":"ISO-AMP — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The two supply domains, input reference and output interface"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-isolation-amp","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["capacitive-digital-isolator","plc-io"],"artwork":"electronics-amp-isolation","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/isolation-amplifier","illustration":"https://eloragrid.ai/library/illustrations/isolation-amplifier.svg"},{"slug":"operational-transconductance-amplifier","name":"Operational transconductance amplifier","kind":"symbol","abbreviation":"OTA","aliases":["transconductance amp","voltage to current amplifier"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Produces an output current controlled by its differential input voltage and documented bias arrangement.","description":["Produces an output current controlled by its differential input voltage and documented bias arrangement.","On a schematic, identify the differential inputs, bias-current control and output-current node and trace the current-mode signal or controlled filter/amplifier circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Transconductance relates input voltage to output current; it differs from an ordinary voltage-output op amp.","Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing."],"readingNotes":["Identify the differential inputs, bias-current control and output-current node.","Trace the current-mode signal or controlled filter/amplifier circuit."],"drawingChecklist":["Label the differential inputs, bias-current control and output-current node.","Cross-reference the current-mode signal or controlled filter/amplifier circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Transconductance relates input voltage to output current; it differs from an ordinary voltage-output op amp.","facts":[{"label":"Common schematic mnemonic","value":"OTA — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The differential inputs, bias-current control and output-current node"},{"label":"Artwork scope","value":"Original educational component glyph; not a certified standard graphic or package pinout."}],"references":[{"sourceId":"pub-electronics-ti-ota","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["operational-amplifier","plc-io"],"artwork":"electronics-amp-ota","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/operational-transconductance-amplifier","illustration":"https://eloragrid.ai/library/illustrations/operational-transconductance-amplifier.svg"},{"slug":"analog-multiplier","name":"Analogue multiplier","kind":"symbol","abbreviation":"MULT","aliases":["analog multiplier","four quadrant multiplier"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Produces an analogue output related to the product of two input quantities and the selected scaling/summing arrangement.","description":["Produces an analogue output related to the product of two input quantities and the selected scaling/summing arrangement.","On a schematic, identify the two input channels, scaling and any summing/reference terminal and trace the product signal and receiving analogue circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An analogue multiplier processes continuous quantities; it is not a binary full-adder or a simple AND gate.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the two input channels, scaling and any summing/reference terminal.","Trace the product signal and receiving analogue circuit."],"drawingChecklist":["Label the two input channels, scaling and any summing/reference terminal.","Cross-reference the product signal and receiving analogue circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An analogue multiplier processes continuous quantities; it is not a binary full-adder or a simple AND gate.","facts":[{"label":"Common schematic mnemonic","value":"MULT — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The two input channels, scaling and any summing/reference terminal"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-adi-multiplier","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["binary-full-adder","plc-io"],"artwork":"electronics-analogue-multiplier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/analog-multiplier","illustration":"https://eloragrid.ai/library/illustrations/analog-multiplier.svg"},{"slug":"analog-bilateral-switch","name":"Analogue bilateral switch","kind":"symbol","abbreviation":"A-SW","aliases":["analog switch","bilateral transmission switch"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Connects or disconnects an analogue signal path under its documented digital control.","description":["Connects or disconnects an analogue signal path under its documented digital control.","On a schematic, identify the two signal terminals, supply rails and control active level and trace the switched analogue path and its reference limits. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Bilateral signal routing does not imply unrestricted voltage, current or galvanic isolation.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the two signal terminals, supply rails and control active level.","Trace the switched analogue path and its reference limits."],"drawingChecklist":["Label the two signal terminals, supply rails and control active level.","Cross-reference the switched analogue path and its reference limits.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Bilateral signal routing does not imply unrestricted voltage, current or galvanic isolation.","facts":[{"label":"Common schematic mnemonic","value":"A-SW — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The two signal terminals, supply rails and control active level"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-analog-switch","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["digital-multiplexer","plc-io"],"artwork":"electronics-analogue-switch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/analog-bilateral-switch","illustration":"https://eloragrid.ai/library/illustrations/analog-bilateral-switch.svg"},{"slug":"analog-multiplexer","name":"Analogue multiplexer","kind":"symbol","abbreviation":"A-MUX","aliases":["analog multiplexer","analogue channel selector"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Selects a continuous-signal channel through the documented controlled switching arrangement.","description":["Selects a continuous-signal channel through the documented controlled switching arrangement.","On a schematic, identify the analogue channels, common terminal, supplies and address/enable pins and trace the selected measurement path and ADC interface. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An analogue multiplexer passes signals within its limits; a digital multiplexer regenerates defined logic states.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the analogue channels, common terminal, supplies and address/enable pins.","Trace the selected measurement path and ADC interface."],"drawingChecklist":["Label the analogue channels, common terminal, supplies and address/enable pins.","Cross-reference the selected measurement path and ADC interface.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An analogue multiplexer passes signals within its limits; a digital multiplexer regenerates defined logic states.","facts":[{"label":"Common schematic mnemonic","value":"A-MUX — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The analogue channels, common terminal, supplies and address/enable pins"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-analog-mux","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["digital-multiplexer","plc-io"],"artwork":"electronics-analogue-mux","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/analog-multiplexer","illustration":"https://eloragrid.ai/library/illustrations/analog-multiplexer.svg"},{"slug":"sample-and-hold-amplifier","name":"Sample-and-hold amplifier","kind":"symbol","abbreviation":"S/H","aliases":["sample hold","track and hold","SHA"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Acquires an analogue signal during the documented sampling interval and retains a representation during hold.","description":["Acquires an analogue signal during the documented sampling interval and retains a representation during hold.","On a schematic, identify the analogue input, sample/hold control and storage or timing reference and trace the held analogue output and converter interface. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Hold behaviour is an analogue acquisition function; it differs from digital storage in a latch or flip-flop.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the analogue input, sample/hold control and storage or timing reference.","Trace the held analogue output and converter interface."],"drawingChecklist":["Label the analogue input, sample/hold control and storage or timing reference.","Cross-reference the held analogue output and converter interface.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Hold behaviour is an analogue acquisition function; it differs from digital storage in a latch or flip-flop.","facts":[{"label":"Common schematic mnemonic","value":"S/H — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The analogue input, sample/hold control and storage or timing reference"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-adi-sample-hold","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["positive-edge-d-flip-flop","plc-io"],"artwork":"electronics-analogue-sample-hold","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/sample-and-hold-amplifier","illustration":"https://eloragrid.ai/library/illustrations/sample-and-hold-amplifier.svg"},{"slug":"analog-to-digital-converter","name":"Analogue-to-digital converter","kind":"symbol","abbreviation":"ADC","aliases":["analog to digital converter","A D converter","A/D"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Converts a sampled analogue quantity into the selected digital representation.","description":["Converts a sampled analogue quantity into the selected digital representation.","On a schematic, identify the analogue input, reference, sampling/clock and supply domains and trace the output word or serial interface and data-ready signal. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An ADC block does not define resolution, coding, bandwidth or input limits without the chosen converter documentation.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the analogue input, reference, sampling/clock and supply domains.","Trace the output word or serial interface and data-ready signal."],"drawingChecklist":["Label the analogue input, reference, sampling/clock and supply domains.","Cross-reference the output word or serial interface and data-ready signal.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An ADC block does not define resolution, coding, bandwidth or input limits without the chosen converter documentation.","facts":[{"label":"Common schematic mnemonic","value":"ADC — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The analogue input, reference, sampling/clock and supply domains"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-adi-adc","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["plc-analog-input","plc-io"],"artwork":"electronics-analogue-adc","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/analog-to-digital-converter","illustration":"https://eloragrid.ai/library/illustrations/analog-to-digital-converter.svg"},{"slug":"digital-to-analog-converter","name":"Digital-to-analogue converter","kind":"symbol","abbreviation":"DAC","aliases":["digital to analog converter","D A converter","D/A"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Converts a digital code into the documented analogue output quantity.","description":["Converts a digital code into the documented analogue output quantity.","On a schematic, identify the input data interface, reference and output-stage arrangement and trace the analogue voltage/current output and load. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A DAC generates an analogue representation of a code; it is not a pulse-width-modulated power converter by definition.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the input data interface, reference and output-stage arrangement.","Trace the analogue voltage/current output and load."],"drawingChecklist":["Label the input data interface, reference and output-stage arrangement.","Cross-reference the analogue voltage/current output and load.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A DAC generates an analogue representation of a code; it is not a pulse-width-modulated power converter by definition.","facts":[{"label":"Common schematic mnemonic","value":"DAC — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input data interface, reference and output-stage arrangement"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-adi-dac","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["plc-analog-output","plc-io"],"artwork":"electronics-analogue-dac","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/digital-to-analog-converter","illustration":"https://eloragrid.ai/library/illustrations/digital-to-analog-converter.svg"},{"slug":"series-voltage-reference","name":"Series voltage reference","kind":"symbol","abbreviation":"VREF-S","aliases":["series reference","precision voltage reference"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Provides a reference voltage through a series-connected supply and output arrangement.","description":["Provides a reference voltage through a series-connected supply and output arrangement.","On a schematic, identify the input supply, reference output and reference return and trace the ADC/DAC reference network and any buffering. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A reference establishes a measurement datum; it is not automatically a load-power regulator.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the input supply, reference output and reference return.","Trace the ADC/DAC reference network and any buffering."],"drawingChecklist":["Label the input supply, reference output and reference return.","Cross-reference the ADC/DAC reference network and any buffering.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A reference establishes a measurement datum; it is not automatically a load-power regulator.","facts":[{"label":"Common schematic mnemonic","value":"VREF-S — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input supply, reference output and reference return"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-adi-series-ref","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["analog-to-digital-converter","plc-io"],"artwork":"electronics-analogue-series-ref","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/series-voltage-reference","illustration":"https://eloragrid.ai/library/illustrations/series-voltage-reference.svg"},{"slug":"shunt-voltage-reference","name":"Shunt voltage reference","kind":"symbol","abbreviation":"VREF-H","aliases":["shunt reference","programmable shunt reference"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Establishes a reference voltage using a shunt-current path and the documented bias or feedback circuit.","description":["Establishes a reference voltage using a shunt-current path and the documented bias or feedback circuit.","On a schematic, identify the shunt terminals, bias-current source and adjustment network and trace the reference node and return conductor. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A shunt reference requires its bias arrangement; its terminals cannot be substituted directly for a three-terminal series reference.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the shunt terminals, bias-current source and adjustment network.","Trace the reference node and return conductor."],"drawingChecklist":["Label the shunt terminals, bias-current source and adjustment network.","Cross-reference the reference node and return conductor.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A shunt reference requires its bias arrangement; its terminals cannot be substituted directly for a three-terminal series reference.","facts":[{"label":"Common schematic mnemonic","value":"VREF-H — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The shunt terminals, bias-current source and adjustment network"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-shunt-ref","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["zener-diode","plc-io"],"artwork":"electronics-analogue-shunt-ref","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/shunt-voltage-reference","illustration":"https://eloragrid.ai/library/illustrations/shunt-voltage-reference.svg"},{"slug":"precision-rectifier","name":"Precision rectifier","kind":"symbol","abbreviation":"PREC-RECT","aliases":["active rectifier","signal rectifier","super diode"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Uses an active amplifier/diode arrangement to rectify a signal according to the documented circuit.","description":["Uses an active amplifier/diode arrangement to rectify a signal according to the documented circuit.","On a schematic, identify the signal polarity, amplifier rails and diode feedback paths and trace the rectified measurement output. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Signal precision rectification differs from a power bridge rectifier and still depends on amplifier limits and circuit bandwidth.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the signal polarity, amplifier rails and diode feedback paths.","Trace the rectified measurement output."],"drawingChecklist":["Label the signal polarity, amplifier rails and diode feedback paths.","Cross-reference the rectified measurement output.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Signal precision rectification differs from a power bridge rectifier and still depends on amplifier limits and circuit bandwidth.","facts":[{"label":"Common schematic mnemonic","value":"PREC-RECT — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The signal polarity, amplifier rails and diode feedback paths"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-precision-rectifier","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["single-phase-bridge-rectifier","plc-io"],"artwork":"electronics-analogue-rectifier","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/precision-rectifier","illustration":"https://eloragrid.ai/library/illustrations/precision-rectifier.svg"},{"slug":"rms-to-dc-converter","name":"RMS-to-DC converter","kind":"symbol","abbreviation":"RMS-DC","aliases":["true RMS converter","RMS measurement IC"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Produces a DC output related to the RMS value of its input signal under the selected implementation.","description":["Produces a DC output related to the RMS value of its input signal under the selected implementation.","On a schematic, identify the AC input scaling, averaging/filter network and output reference and trace the RMS measurement output and receiving converter. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","RMS conversion measures a specific signal quantity; an ordinary rectifier/average circuit does not universally produce the same result.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the AC input scaling, averaging/filter network and output reference.","Trace the RMS measurement output and receiving converter."],"drawingChecklist":["Label the AC input scaling, averaging/filter network and output reference.","Cross-reference the RMS measurement output and receiving converter.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"RMS conversion measures a specific signal quantity; an ordinary rectifier/average circuit does not universally produce the same result.","facts":[{"label":"Common schematic mnemonic","value":"RMS-DC — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The AC input scaling, averaging/filter network and output reference"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-adi-rms","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["active-power-indicator","plc-io"],"artwork":"electronics-analogue-rms","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/rms-to-dc-converter","illustration":"https://eloragrid.ai/library/illustrations/rms-to-dc-converter.svg"},{"slug":"voltage-frequency-converter","name":"Voltage / frequency converter","kind":"symbol","abbreviation":"V/F","aliases":["voltage to frequency","frequency to voltage","V F V converter"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Converts between an analogue voltage and a pulse-frequency representation in the documented selected configuration.","description":["Converts between an analogue voltage and a pulse-frequency representation in the documented selected configuration.","On a schematic, identify the signal input, conversion direction and timing/scaling network and trace the pulse or analogue output and its receiving interface. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","The drawing must state the selected direction; the same component family may support V-to-F and F-to-V through different external connections.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the signal input, conversion direction and timing/scaling network.","Trace the pulse or analogue output and its receiving interface."],"drawingChecklist":["Label the signal input, conversion direction and timing/scaling network.","Cross-reference the pulse or analogue output and its receiving interface.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"The drawing must state the selected direction; the same component family may support V-to-F and F-to-V through different external connections.","facts":[{"label":"Common schematic mnemonic","value":"V/F — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The signal input, conversion direction and timing/scaling network"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-adi-vf","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["frequency-meter","plc-io"],"artwork":"electronics-analogue-vf","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/voltage-frequency-converter","illustration":"https://eloragrid.ai/library/illustrations/voltage-frequency-converter.svg"},{"slug":"inverting-amplifier-circuit","name":"Inverting amplifier circuit","kind":"symbol","abbreviation":"INV-AMP","aliases":["negative gain amplifier","inverting op amp"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Uses an amplifier feedback connection that produces the documented inverted signal relationship.","description":["Uses an amplifier feedback connection that produces the documented inverted signal relationship.","On a schematic, identify the input impedance, feedback network and non-inverting reference and trace the inverted output and load. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","This is a circuit configuration around an amplifier, not a separate package or a digital NOT gate.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the input impedance, feedback network and non-inverting reference.","Trace the inverted output and load."],"drawingChecklist":["Label the input impedance, feedback network and non-inverting reference.","Cross-reference the inverted output and load.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"This is a circuit configuration around an amplifier, not a separate package or a digital NOT gate.","facts":[{"label":"Common schematic mnemonic","value":"INV-AMP — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input impedance, feedback network and non-inverting reference"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-adi-opamp-tutorials","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["logic-inverter","plc-io"],"artwork":"electronics-amp-inverting","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/inverting-amplifier-circuit","illustration":"https://eloragrid.ai/library/illustrations/inverting-amplifier-circuit.svg"},{"slug":"non-inverting-amplifier-circuit","name":"Non-inverting amplifier circuit","kind":"symbol","abbreviation":"NI-AMP","aliases":["positive gain amplifier","noninverting op amp"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Uses an amplifier feedback arrangement to amplify a signal without the intended polarity inversion.","description":["Uses an amplifier feedback arrangement to amplify a signal without the intended polarity inversion.","On a schematic, identify the non-inverting input, feedback divider and reference node and trace the amplified output and feedback return. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A non-inverting configuration has a circuit-defined gain; the generic op-amp triangle does not establish it.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the non-inverting input, feedback divider and reference node.","Trace the amplified output and feedback return."],"drawingChecklist":["Label the non-inverting input, feedback divider and reference node.","Cross-reference the amplified output and feedback return.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A non-inverting configuration has a circuit-defined gain; the generic op-amp triangle does not establish it.","facts":[{"label":"Common schematic mnemonic","value":"NI-AMP — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The non-inverting input, feedback divider and reference node"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-adi-opamp-tutorials","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["inverting-amplifier-circuit","plc-io"],"artwork":"electronics-amp-noninverting","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/non-inverting-amplifier-circuit","illustration":"https://eloragrid.ai/library/illustrations/non-inverting-amplifier-circuit.svg"},{"slug":"op-amp-integrator","name":"Op-amp integrator","kind":"symbol","abbreviation":"INTEGRATOR","aliases":["analogue integrator","integrating amplifier"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Uses a documented amplifier/capacitor feedback arrangement to obtain an integrating signal response.","description":["Uses a documented amplifier/capacitor feedback arrangement to obtain an integrating signal response.","On a schematic, identify the input resistance, feedback capacitance and any reset/DC-restoration path and trace the integrated output and its reference. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An integrator is an active circuit response; the output range and long-term drift depend on the actual implementation.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the input resistance, feedback capacitance and any reset/DC-restoration path.","Trace the integrated output and its reference."],"drawingChecklist":["Label the input resistance, feedback capacitance and any reset/DC-restoration path.","Cross-reference the integrated output and its reference.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An integrator is an active circuit response; the output range and long-term drift depend on the actual implementation.","facts":[{"label":"Common schematic mnemonic","value":"INTEGRATOR — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input resistance, feedback capacitance and any reset/DC-restoration path"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-integrator","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["op-amp-differentiator","plc-io"],"artwork":"electronics-amp-integrator","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/op-amp-integrator","illustration":"https://eloragrid.ai/library/illustrations/op-amp-integrator.svg"},{"slug":"op-amp-differentiator","name":"Op-amp differentiator","kind":"symbol","abbreviation":"DIFFERENTIATOR","aliases":["analogue differentiator","differentiating amplifier"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Uses an amplifier input/feedback arrangement to obtain a differentiating response over its intended operating band.","description":["Uses an amplifier input/feedback arrangement to obtain a differentiating response over its intended operating band.","On a schematic, identify the input capacitance, feedback path and bandwidth-limiting network and trace the differentiated output and reference. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A practical differentiator has an intended frequency range; the ideal mathematical label does not specify a stable component circuit.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the input capacitance, feedback path and bandwidth-limiting network.","Trace the differentiated output and reference."],"drawingChecklist":["Label the input capacitance, feedback path and bandwidth-limiting network.","Cross-reference the differentiated output and reference.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A practical differentiator has an intended frequency range; the ideal mathematical label does not specify a stable component circuit.","facts":[{"label":"Common schematic mnemonic","value":"DIFFERENTIATOR — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input capacitance, feedback path and bandwidth-limiting network"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-differentiator","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["op-amp-integrator","plc-io"],"artwork":"electronics-amp-differentiator","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/op-amp-differentiator","illustration":"https://eloragrid.ai/library/illustrations/op-amp-differentiator.svg"},{"slug":"active-low-pass-filter","name":"Active low-pass filter","kind":"symbol","abbreviation":"LPF","aliases":["low pass analogue filter","anti alias filter"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Passes the intended lower-frequency signal content while attenuating higher-frequency content through an active filter circuit.","description":["Passes the intended lower-frequency signal content while attenuating higher-frequency content through an active filter circuit.","On a schematic, identify the input/output references, filter order and corner-frequency documentation and trace the filtered measurement path and receiving converter. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","The LPF label describes a response class; it does not set cutoff, gain, order or component values.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the input/output references, filter order and corner-frequency documentation.","Trace the filtered measurement path and receiving converter."],"drawingChecklist":["Label the input/output references, filter order and corner-frequency documentation.","Cross-reference the filtered measurement path and receiving converter.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"The LPF label describes a response class; it does not set cutoff, gain, order or component values.","facts":[{"label":"Common schematic mnemonic","value":"LPF — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input/output references, filter order and corner-frequency documentation"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-active-filters","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["active-high-pass-filter","plc-io"],"artwork":"electronics-filter-low","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/active-low-pass-filter","illustration":"https://eloragrid.ai/library/illustrations/active-low-pass-filter.svg"},{"slug":"active-high-pass-filter","name":"Active high-pass filter","kind":"symbol","abbreviation":"HPF","aliases":["high pass analogue filter","DC blocking active filter"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Attenuates lower-frequency content while passing the intended higher-frequency signal band.","description":["Attenuates lower-frequency content while passing the intended higher-frequency signal band.","On a schematic, identify the signal reference, filter order and lower-band boundary and trace the filtered output and its downstream gain/measurement path. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","High-pass behaviour differs from low-pass filtering and does not imply galvanic isolation of the signal.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the signal reference, filter order and lower-band boundary.","Trace the filtered output and its downstream gain/measurement path."],"drawingChecklist":["Label the signal reference, filter order and lower-band boundary.","Cross-reference the filtered output and its downstream gain/measurement path.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"High-pass behaviour differs from low-pass filtering and does not imply galvanic isolation of the signal.","facts":[{"label":"Common schematic mnemonic","value":"HPF — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The signal reference, filter order and lower-band boundary"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-active-filters","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["active-low-pass-filter","plc-io"],"artwork":"electronics-filter-high","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/active-high-pass-filter","illustration":"https://eloragrid.ai/library/illustrations/active-high-pass-filter.svg"},{"slug":"active-band-pass-filter","name":"Active band-pass filter","kind":"symbol","abbreviation":"BPF","aliases":["band pass analogue filter","bandpass amplifier"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Passes an intended frequency band while attenuating content below and above that band.","description":["Passes an intended frequency band while attenuating content below and above that band.","On a schematic, identify the lower/upper response boundaries, order and gain definition and trace the selected-band output and receiving measurement circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A band-pass filter selects a band; a notch filter instead rejects a defined band or frequency region.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the lower/upper response boundaries, order and gain definition.","Trace the selected-band output and receiving measurement circuit."],"drawingChecklist":["Label the lower/upper response boundaries, order and gain definition.","Cross-reference the selected-band output and receiving measurement circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A band-pass filter selects a band; a notch filter instead rejects a defined band or frequency region.","facts":[{"label":"Common schematic mnemonic","value":"BPF — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The lower/upper response boundaries, order and gain definition"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-active-filters","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["active-notch-filter","plc-io"],"artwork":"electronics-filter-band","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/active-band-pass-filter","illustration":"https://eloragrid.ai/library/illustrations/active-band-pass-filter.svg"},{"slug":"active-notch-filter","name":"Active notch filter","kind":"symbol","abbreviation":"NOTCH","aliases":["band stop filter","band rejection filter"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Attenuates a defined frequency region while retaining the intended content outside it.","description":["Attenuates a defined frequency region while retaining the intended content outside it.","On a schematic, identify the rejection-frequency reference, bandwidth and active circuit supplies and trace the filtered output and measurement use. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","The notch response does not identify the actual frequency or depth without the selected filter design.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the rejection-frequency reference, bandwidth and active circuit supplies.","Trace the filtered output and measurement use."],"drawingChecklist":["Label the rejection-frequency reference, bandwidth and active circuit supplies.","Cross-reference the filtered output and measurement use.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"The notch response does not identify the actual frequency or depth without the selected filter design.","facts":[{"label":"Common schematic mnemonic","value":"NOTCH — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The rejection-frequency reference, bandwidth and active circuit supplies"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-ti-active-filters","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["active-band-pass-filter","plc-io"],"artwork":"electronics-filter-notch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/active-notch-filter","illustration":"https://eloragrid.ai/library/illustrations/active-notch-filter.svg"},{"slug":"transimpedance-amplifier","name":"Transimpedance amplifier","kind":"symbol","abbreviation":"TIA","aliases":["current to voltage amplifier","photodiode amplifier"],"category":"logic-signals","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Converts an input current into an output voltage through the documented feedback arrangement.","description":["Converts an input current into an output voltage through the documented feedback arrangement.","On a schematic, identify the detector/current input, feedback impedance and input reference and trace the voltage output and receiving acquisition circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A transimpedance amplifier relates current to voltage; a transconductance amplifier relates voltage to current.","The preview is an independently drawn educational functional reference. Add the selected component’s actual power pins, terminal numbers, timing or analogue reference details when producing a construction drawing."],"readingNotes":["Identify the detector/current input, feedback impedance and input reference.","Trace the voltage output and receiving acquisition circuit."],"drawingChecklist":["Label the detector/current input, feedback impedance and input reference.","Cross-reference the voltage output and receiving acquisition circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A transimpedance amplifier relates current to voltage; a transconductance amplifier relates voltage to current.","facts":[{"label":"Common schematic mnemonic","value":"TIA — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The detector/current input, feedback impedance and input reference"},{"label":"Artwork scope","value":"Original educational functional/circuit reference; not a selected product pinout."}],"references":[{"sourceId":"pub-electronics-adi-tia","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["operational-transconductance-amplifier","plc-io"],"artwork":"electronics-amp-tia","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/transimpedance-amplifier","illustration":"https://eloragrid.ai/library/illustrations/transimpedance-amplifier.svg"},{"slug":"buck-converter-topology","name":"Buck converter topology","kind":"symbol","abbreviation":"BUCK","aliases":["step down switching converter","buck regulator"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A switching converter arrangement used to produce a lower DC output from its input under the documented operating conditions.","description":["A switching converter arrangement used to produce a lower DC output from its input under the documented operating conditions.","On a schematic, identify the input supply, switching node, energy-storage inductor and return and trace the regulated output, feedback path and freewheeling arrangement. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Buck identifies a conversion topology; its schematic does not by itself define an isolated supply or an allowed operating range.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the input supply, switching node, energy-storage inductor and return.","Trace the regulated output, feedback path and freewheeling arrangement."],"drawingChecklist":["Label the input supply, switching node, energy-storage inductor and return.","Cross-reference the regulated output, feedback path and freewheeling arrangement.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Buck identifies a conversion topology; its schematic does not by itself define an isolated supply or an allowed operating range.","facts":[{"label":"Common schematic mnemonic","value":"BUCK — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input supply, switching node, energy-storage inductor and return"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-topologies","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["boost-converter-topology","power-converter"],"artwork":"electronics-power-buck","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/buck-converter-topology","illustration":"https://eloragrid.ai/library/illustrations/buck-converter-topology.svg"},{"slug":"boost-converter-topology","name":"Boost converter topology","kind":"symbol","abbreviation":"BOOST","aliases":["step up switching converter","boost regulator"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A switching converter arrangement used to obtain a higher DC output from its documented input range.","description":["A switching converter arrangement used to obtain a higher DC output from its documented input range.","On a schematic, identify the input inductor, controlled switch and output transfer path and trace the boosted output, feedback and return circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A boost topology steps up in its intended mode; the output-disconnection behaviour depends on the actual switching arrangement.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the input inductor, controlled switch and output transfer path.","Trace the boosted output, feedback and return circuit."],"drawingChecklist":["Label the input inductor, controlled switch and output transfer path.","Cross-reference the boosted output, feedback and return circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A boost topology steps up in its intended mode; the output-disconnection behaviour depends on the actual switching arrangement.","facts":[{"label":"Common schematic mnemonic","value":"BOOST — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input inductor, controlled switch and output transfer path"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-topologies","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["buck-converter-topology","power-converter"],"artwork":"electronics-power-boost","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/boost-converter-topology","illustration":"https://eloragrid.ai/library/illustrations/boost-converter-topology.svg"},{"slug":"inverting-buck-boost-topology","name":"Inverting buck-boost topology","kind":"symbol","abbreviation":"INV-BB","aliases":["negative output buck boost","inverting DC DC"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A buck-boost arrangement whose output polarity is opposite to its defined input reference.","description":["A buck-boost arrangement whose output polarity is opposite to its defined input reference.","On a schematic, identify the switch/inductor path, input return and negative-output reference and trace the energy-transfer and feedback circuit. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Negative output polarity distinguishes this arrangement from a non-inverting four-switch buck-boost stage.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the switch/inductor path, input return and negative-output reference.","Trace the energy-transfer and feedback circuit."],"drawingChecklist":["Label the switch/inductor path, input return and negative-output reference.","Cross-reference the energy-transfer and feedback circuit.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Negative output polarity distinguishes this arrangement from a non-inverting four-switch buck-boost stage.","facts":[{"label":"Common schematic mnemonic","value":"INV-BB — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The switch/inductor path, input return and negative-output reference"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-topologies","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["four-switch-buck-boost-topology","power-converter"],"artwork":"electronics-power-inverting","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/inverting-buck-boost-topology","illustration":"https://eloragrid.ai/library/illustrations/inverting-buck-boost-topology.svg"},{"slug":"four-switch-buck-boost-topology","name":"Four-switch buck-boost topology","kind":"symbol","abbreviation":"4SW-BB","aliases":["noninverting buck boost","four switch converter"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A non-inverting conversion arrangement with switching legs that support documented buck and boost operation.","description":["A non-inverting conversion arrangement with switching legs that support documented buck and boost operation.","On a schematic, identify the two switching legs, shared inductor and common reference and trace the positive-polarity output and controller feedback. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Four-switch buck-boost and inverting buck-boost have different power paths and output polarity.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the two switching legs, shared inductor and common reference.","Trace the positive-polarity output and controller feedback."],"drawingChecklist":["Label the two switching legs, shared inductor and common reference.","Cross-reference the positive-polarity output and controller feedback.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Four-switch buck-boost and inverting buck-boost have different power paths and output polarity.","facts":[{"label":"Common schematic mnemonic","value":"4SW-BB — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The two switching legs, shared inductor and common reference"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-topologies","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["inverting-buck-boost-topology","power-converter"],"artwork":"electronics-power-four-switch","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/four-switch-buck-boost-topology","illustration":"https://eloragrid.ai/library/illustrations/four-switch-buck-boost-topology.svg"},{"slug":"sepic-converter-topology","name":"SEPIC converter topology","kind":"symbol","abbreviation":"SEPIC","aliases":["single ended primary inductance converter"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A non-inverting conversion topology using its documented inductive and series-capacitor energy-transfer arrangement.","description":["A non-inverting conversion topology using its documented inductive and series-capacitor energy-transfer arrangement.","On a schematic, identify the inductors, series coupling capacitor and switch/diode paths and trace the output and controller feedback references. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","SEPIC is a distinct arrangement from a four-switch buck-boost; the mnemonic does not mean galvanic isolation.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the inductors, series coupling capacitor and switch/diode paths.","Trace the output and controller feedback references."],"drawingChecklist":["Label the inductors, series coupling capacitor and switch/diode paths.","Cross-reference the output and controller feedback references.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"SEPIC is a distinct arrangement from a four-switch buck-boost; the mnemonic does not mean galvanic isolation.","facts":[{"label":"Common schematic mnemonic","value":"SEPIC — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The inductors, series coupling capacitor and switch/diode paths"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-topologies","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["cuk-converter-topology","power-converter"],"artwork":"electronics-power-sepic","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/sepic-converter-topology","illustration":"https://eloragrid.ai/library/illustrations/sepic-converter-topology.svg"},{"slug":"cuk-converter-topology","name":"Cuk converter topology","kind":"symbol","abbreviation":"CUK","aliases":["Ćuk converter","inverting capacitive energy transfer"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An inverting conversion topology using a capacitor as part of the energy-transfer path between inductive stages.","description":["An inverting conversion topology using a capacitor as part of the energy-transfer path between inductive stages.","On a schematic, identify the input/output inductors, transfer capacitor and reference polarity and trace the negative output and feedback path. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Cuk and SEPIC are different circuit arrangements; the output polarity and energy-transfer connections must be shown correctly.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the input/output inductors, transfer capacitor and reference polarity.","Trace the negative output and feedback path."],"drawingChecklist":["Label the input/output inductors, transfer capacitor and reference polarity.","Cross-reference the negative output and feedback path.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Cuk and SEPIC are different circuit arrangements; the output polarity and energy-transfer connections must be shown correctly.","facts":[{"label":"Common schematic mnemonic","value":"CUK — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The input/output inductors, transfer capacitor and reference polarity"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-topologies","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["sepic-converter-topology","power-converter"],"artwork":"electronics-power-cuk","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/cuk-converter-topology","illustration":"https://eloragrid.ai/library/illustrations/cuk-converter-topology.svg"},{"slug":"zeta-converter-topology","name":"Zeta converter topology","kind":"symbol","abbreviation":"ZETA","aliases":["Zeta DC DC","noninverting dual inductor converter"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A non-inverting converter arrangement using its documented inductive and capacitive transfer circuit.","description":["A non-inverting converter arrangement using its documented inductive and capacitive transfer circuit.","On a schematic, identify the controlled switch, coupling capacitor and inductor connections and trace the output current path and feedback reference. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Zeta and SEPIC can both support buck/boost conversion, but their switch and energy-storage arrangements differ.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the controlled switch, coupling capacitor and inductor connections.","Trace the output current path and feedback reference."],"drawingChecklist":["Label the controlled switch, coupling capacitor and inductor connections.","Cross-reference the output current path and feedback reference.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Zeta and SEPIC can both support buck/boost conversion, but their switch and energy-storage arrangements differ.","facts":[{"label":"Common schematic mnemonic","value":"ZETA — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The controlled switch, coupling capacitor and inductor connections"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-topologies","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["sepic-converter-topology","power-converter"],"artwork":"electronics-power-zeta","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/zeta-converter-topology","illustration":"https://eloragrid.ai/library/illustrations/zeta-converter-topology.svg"},{"slug":"flyback-converter-topology","name":"Flyback converter topology","kind":"symbol","abbreviation":"FLYBACK","aliases":["isolated flyback","flyback power stage"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A conversion arrangement that uses coupled magnetic energy storage and transfers energy through the documented switching sequence.","description":["A conversion arrangement that uses coupled magnetic energy storage and transfers energy through the documented switching sequence.","On a schematic, identify the coupled-winding polarity, primary switch and secondary rectification and trace the secondary output and isolation/feedback boundary. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Flyback differs from a forward converter's transfer arrangement; a transformer-like glyph alone does not distinguish them.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the coupled-winding polarity, primary switch and secondary rectification.","Trace the secondary output and isolation/feedback boundary."],"drawingChecklist":["Label the coupled-winding polarity, primary switch and secondary rectification.","Cross-reference the secondary output and isolation/feedback boundary.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Flyback differs from a forward converter's transfer arrangement; a transformer-like glyph alone does not distinguish them.","facts":[{"label":"Common schematic mnemonic","value":"FLYBACK — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The coupled-winding polarity, primary switch and secondary rectification"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-topologies","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["forward-converter-topology","power-converter"],"artwork":"electronics-power-flyback","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/flyback-converter-topology","illustration":"https://eloragrid.ai/library/illustrations/flyback-converter-topology.svg"},{"slug":"forward-converter-topology","name":"Forward converter topology","kind":"symbol","abbreviation":"FORWARD","aliases":["single switch forward","isolated forward converter"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A conversion topology transferring power through coupled windings during the documented primary conduction interval.","description":["A conversion topology transferring power through coupled windings during the documented primary conduction interval.","On a schematic, identify the primary switch, winding polarity, reset path and output inductor and trace the secondary rectification and output feedback. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A forward stage needs its magnetising-reset arrangement; it is not a flyback with an additional output-inductor label.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the primary switch, winding polarity, reset path and output inductor.","Trace the secondary rectification and output feedback."],"drawingChecklist":["Label the primary switch, winding polarity, reset path and output inductor.","Cross-reference the secondary rectification and output feedback.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A forward stage needs its magnetising-reset arrangement; it is not a flyback with an additional output-inductor label.","facts":[{"label":"Common schematic mnemonic","value":"FORWARD — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The primary switch, winding polarity, reset path and output inductor"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-topologies","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["flyback-converter-topology","power-converter"],"artwork":"electronics-power-forward","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/forward-converter-topology","illustration":"https://eloragrid.ai/library/illustrations/forward-converter-topology.svg"},{"slug":"active-clamp-forward-topology","name":"Active-clamp forward topology","kind":"symbol","abbreviation":"ACF","aliases":["active clamp forward converter"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A forward converter arrangement with an actively controlled clamp/reset circuit.","description":["A forward converter arrangement with an actively controlled clamp/reset circuit.","On a schematic, identify the main switch, clamp switch/capacitor and magnetic-reset path and trace the secondary power path and controller timing interfaces. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","The active clamp is part of the conversion arrangement; its control timing cannot be inferred from an ordinary forward block.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the main switch, clamp switch/capacitor and magnetic-reset path.","Trace the secondary power path and controller timing interfaces."],"drawingChecklist":["Label the main switch, clamp switch/capacitor and magnetic-reset path.","Cross-reference the secondary power path and controller timing interfaces.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"The active clamp is part of the conversion arrangement; its control timing cannot be inferred from an ordinary forward block.","facts":[{"label":"Common schematic mnemonic","value":"ACF — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The main switch, clamp switch/capacitor and magnetic-reset path"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-topologies","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["forward-converter-topology","power-converter"],"artwork":"electronics-power-clamp-forward","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/active-clamp-forward-topology","illustration":"https://eloragrid.ai/library/illustrations/active-clamp-forward-topology.svg"},{"slug":"push-pull-converter-topology","name":"Push-pull converter topology","kind":"symbol","abbreviation":"PUSH-PULL","aliases":["push pull DC DC","centre tapped primary converter"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A converter arrangement driving two primary paths alternately through the documented coupled winding.","description":["A converter arrangement driving two primary paths alternately through the documented coupled winding.","On a schematic, identify the centre-tapped primary connection, two switches and winding polarities and trace the secondary rectification and output path. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Push-pull uses its specific primary arrangement; it differs from a half-bridge applied to a single untapped primary.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the centre-tapped primary connection, two switches and winding polarities.","Trace the secondary rectification and output path."],"drawingChecklist":["Label the centre-tapped primary connection, two switches and winding polarities.","Cross-reference the secondary rectification and output path.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Push-pull uses its specific primary arrangement; it differs from a half-bridge applied to a single untapped primary.","facts":[{"label":"Common schematic mnemonic","value":"PUSH-PULL — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The centre-tapped primary connection, two switches and winding polarities"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-topologies","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["half-bridge-dc-converter-topology","power-converter"],"artwork":"electronics-power-push-pull","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/push-pull-converter-topology","illustration":"https://eloragrid.ai/library/illustrations/push-pull-converter-topology.svg"},{"slug":"half-bridge-dc-converter-topology","name":"Half-bridge DC converter topology","kind":"symbol","abbreviation":"HB-DC","aliases":["half bridge isolated converter"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A DC conversion stage using one switching leg and the documented magnetic/secondary circuit.","description":["A DC conversion stage using one switching leg and the documented magnetic/secondary circuit.","On a schematic, identify the DC-link arrangement, switching midpoint and primary winding and trace the secondary rectifier/output and controller returns. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A half-bridge converter topology describes a circuit, whereas a half-bridge power module describes packaged switching hardware.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the DC-link arrangement, switching midpoint and primary winding.","Trace the secondary rectifier/output and controller returns."],"drawingChecklist":["Label the DC-link arrangement, switching midpoint and primary winding.","Cross-reference the secondary rectifier/output and controller returns.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A half-bridge converter topology describes a circuit, whereas a half-bridge power module describes packaged switching hardware.","facts":[{"label":"Common schematic mnemonic","value":"HB-DC — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The DC-link arrangement, switching midpoint and primary winding"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-topologies","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["half-bridge-power-module","power-converter"],"artwork":"electronics-power-half-dc","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/half-bridge-dc-converter-topology","illustration":"https://eloragrid.ai/library/illustrations/half-bridge-dc-converter-topology.svg"},{"slug":"full-bridge-dc-converter-topology","name":"Full-bridge DC converter topology","kind":"symbol","abbreviation":"FB-DC","aliases":["full bridge isolated converter","H bridge DC DC"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A DC conversion stage using two switching legs to apply the documented waveform to a magnetic primary.","description":["A DC conversion stage using two switching legs to apply the documented waveform to a magnetic primary.","On a schematic, identify the four switches, two bridge midpoints and transformer winding and trace the secondary transfer circuit and bridge control interfaces. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","A full-bridge DC converter includes a secondary DC power path; a full-bridge inverter instead supplies an AC output arrangement.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the four switches, two bridge midpoints and transformer winding.","Trace the secondary transfer circuit and bridge control interfaces."],"drawingChecklist":["Label the four switches, two bridge midpoints and transformer winding.","Cross-reference the secondary transfer circuit and bridge control interfaces.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"A full-bridge DC converter includes a secondary DC power path; a full-bridge inverter instead supplies an AC output arrangement.","facts":[{"label":"Common schematic mnemonic","value":"FB-DC — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The four switches, two bridge midpoints and transformer winding"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-topologies","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["single-phase-voltage-source-inverter","power-converter"],"artwork":"electronics-power-full-dc","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/full-bridge-dc-converter-topology","illustration":"https://eloragrid.ai/library/illustrations/full-bridge-dc-converter-topology.svg"},{"slug":"phase-shift-full-bridge-topology","name":"Phase-shifted full-bridge topology","kind":"symbol","abbreviation":"PSFB","aliases":["phase shift full bridge","PSFB converter"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A full-bridge conversion arrangement controlled through the documented relative switching-leg phase shift.","description":["A full-bridge conversion arrangement controlled through the documented relative switching-leg phase shift.","On a schematic, identify the bridge legs, magnetic path and phase-shift control references and trace the secondary rectification and output regulation. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Phase-shift control is a specific operating arrangement; it is not established merely by showing four power switches.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the bridge legs, magnetic path and phase-shift control references.","Trace the secondary rectification and output regulation."],"drawingChecklist":["Label the bridge legs, magnetic path and phase-shift control references.","Cross-reference the secondary rectification and output regulation.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Phase-shift control is a specific operating arrangement; it is not established merely by showing four power switches.","facts":[{"label":"Common schematic mnemonic","value":"PSFB — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The bridge legs, magnetic path and phase-shift control references"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-topologies","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["full-bridge-dc-converter-topology","power-converter"],"artwork":"electronics-power-psfb","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/phase-shift-full-bridge-topology","illustration":"https://eloragrid.ai/library/illustrations/phase-shift-full-bridge-topology.svg"},{"slug":"llc-resonant-converter-topology","name":"LLC resonant converter topology","kind":"symbol","abbreviation":"LLC","aliases":["LLC resonant converter","resonant DC DC"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A converter arrangement using the documented resonant inductive/capacitive network and magnetic transfer path.","description":["A converter arrangement using the documented resonant inductive/capacitive network and magnetic transfer path.","On a schematic, identify the resonant inductor/capacitor, magnetising inductance and switching bridge and trace the secondary output and resonant-controller interface. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","The LLC designation identifies a resonant network arrangement; it does not state component values, switching limits or efficiency.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the resonant inductor/capacitor, magnetising inductance and switching bridge.","Trace the secondary output and resonant-controller interface."],"drawingChecklist":["Label the resonant inductor/capacitor, magnetising inductance and switching bridge.","Cross-reference the secondary output and resonant-controller interface.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"The LLC designation identifies a resonant network arrangement; it does not state component values, switching limits or efficiency.","facts":[{"label":"Common schematic mnemonic","value":"LLC — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The resonant inductor/capacitor, magnetising inductance and switching bridge"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-llc","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["half-bridge-dc-converter-topology","power-converter"],"artwork":"electronics-power-llc","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/llc-resonant-converter-topology","illustration":"https://eloragrid.ai/library/illustrations/llc-resonant-converter-topology.svg"},{"slug":"dual-active-bridge-topology","name":"Dual-active-bridge topology","kind":"symbol","abbreviation":"DAB","aliases":["bidirectional dual active bridge","isolated bidirectional converter"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A conversion stage with controlled bridges on both sides of a coupled magnetic link.","description":["A conversion stage with controlled bridges on both sides of a coupled magnetic link.","On a schematic, identify the two DC ports, both active bridges and isolation boundary and trace the bidirectional energy path and bridge control references. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","Two actively switched sides distinguish a DAB from a primary bridge with passive secondary rectification.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the two DC ports, both active bridges and isolation boundary.","Trace the bidirectional energy path and bridge control references."],"drawingChecklist":["Label the two DC ports, both active bridges and isolation boundary.","Cross-reference the bidirectional energy path and bridge control references.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"Two actively switched sides distinguish a DAB from a primary bridge with passive secondary rectification.","facts":[{"label":"Common schematic mnemonic","value":"DAB — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The two DC ports, both active bridges and isolation boundary"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-ti-dab","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["full-bridge-dc-converter-topology","power-converter"],"artwork":"electronics-power-dab","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/dual-active-bridge-topology","illustration":"https://eloragrid.ai/library/illustrations/dual-active-bridge-topology.svg"},{"slug":"single-phase-voltage-source-inverter","name":"Single-phase voltage-source inverter","kind":"symbol","abbreviation":"1PH-VSI","aliases":["single phase H bridge inverter","voltage source inverter"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A switching bridge that forms a documented single-phase AC output from a DC-link source.","description":["A switching bridge that forms a documented single-phase AC output from a DC-link source.","On a schematic, identify the DC-link rails, bridge-leg midpoints and AC output/filter reference and trace the AC load or connection point and switching control. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","The bridge can produce a switched waveform; output quality and connection requirements depend on the filter and control design.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the DC-link rails, bridge-leg midpoints and AC output/filter reference.","Trace the AC load or connection point and switching control."],"drawingChecklist":["Label the DC-link rails, bridge-leg midpoints and AC output/filter reference.","Cross-reference the AC load or connection point and switching control.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"The bridge can produce a switched waveform; output quality and connection requirements depend on the filter and control design.","facts":[{"label":"Common schematic mnemonic","value":"1PH-VSI — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The DC-link rails, bridge-leg midpoints and AC output/filter reference"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-infineon-inverter","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["dc-to-ac-inverter","power-converter"],"artwork":"electronics-power-single-vsi","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/single-phase-voltage-source-inverter","illustration":"https://eloragrid.ai/library/illustrations/single-phase-voltage-source-inverter.svg"},{"slug":"three-phase-voltage-source-inverter","name":"Three-phase voltage-source inverter","kind":"symbol","abbreviation":"3PH-VSI","aliases":["three phase inverter bridge","three leg voltage source inverter"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A three-leg bridge producing the documented three-phase output from a DC-link source.","description":["A three-leg bridge producing the documented three-phase output from a DC-link source.","On a schematic, identify the DC-link rails, three switching midpoints and phase labels and trace the three-phase load/connection and driver/control circuits. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","The stage topology does not establish whether the system is grid forming, grid following or suitable for a particular connection.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the DC-link rails, three switching midpoints and phase labels.","Trace the three-phase load/connection and driver/control circuits."],"drawingChecklist":["Label the DC-link rails, three switching midpoints and phase labels.","Cross-reference the three-phase load/connection and driver/control circuits.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"The stage topology does not establish whether the system is grid forming, grid following or suitable for a particular connection.","facts":[{"label":"Common schematic mnemonic","value":"3PH-VSI — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The DC-link rails, three switching midpoints and phase labels"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-infineon-inverter","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["three-phase-sixpack-power-module","power-converter"],"artwork":"electronics-power-three-vsi","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/three-phase-voltage-source-inverter","illustration":"https://eloragrid.ai/library/illustrations/three-phase-voltage-source-inverter.svg"},{"slug":"neutral-point-clamped-inverter","name":"Neutral-point-clamped inverter","kind":"symbol","abbreviation":"NPC","aliases":["three level NPC","diode clamped inverter"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"A multilevel switching arrangement using the documented split DC link and neutral-point clamping paths.","description":["A multilevel switching arrangement using the documented split DC link and neutral-point clamping paths.","On a schematic, identify the split-link midpoint, clamping devices and phase-leg switches and trace the phase output and DC-link balancing/control references. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","NPC identifies a specific multilevel arrangement; active-NPC variants replace parts of the clamping arrangement and need separate device documentation.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the split-link midpoint, clamping devices and phase-leg switches.","Trace the phase output and DC-link balancing/control references."],"drawingChecklist":["Label the split-link midpoint, clamping devices and phase-leg switches.","Cross-reference the phase output and DC-link balancing/control references.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"NPC identifies a specific multilevel arrangement; active-NPC variants replace parts of the clamping arrangement and need separate device documentation.","facts":[{"label":"Common schematic mnemonic","value":"NPC — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The split-link midpoint, clamping devices and phase-leg switches"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-infineon-npc","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["three-phase-voltage-source-inverter","power-converter"],"artwork":"electronics-power-npc","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/neutral-point-clamped-inverter","illustration":"https://eloragrid.ai/library/illustrations/neutral-point-clamped-inverter.svg"},{"slug":"active-front-end-rectifier","name":"Active front-end rectifier","kind":"symbol","abbreviation":"AFE","aliases":["active rectifier","PWM rectifier","bidirectional AC DC front end"],"category":"microgrid-systems","drawingTypes":["Schematic","SLD"],"referenceFamilies":["Manufacturer"],"summary":"An actively switched AC/DC stage using a documented current-control and DC-link regulation arrangement.","description":["An actively switched AC/DC stage using a documented current-control and DC-link regulation arrangement.","On a schematic, identify the AC connection, coupling inductors/filter and active switching bridge and trace the DC-link energy path and front-end control interfaces. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.","An AFE differs from a passive diode bridge; bidirectional operation and power-factor behaviour depend on the actual system/control implementation.","The preview is a conceptual topology reference rather than a complete power-stage circuit. Switching sequences, magnetic design, component selection and control/protection details belong in the equipment design documentation."],"readingNotes":["Identify the AC connection, coupling inductors/filter and active switching bridge.","Trace the DC-link energy path and front-end control interfaces."],"drawingChecklist":["Label the AC connection, coupling inductors/filter and active switching bridge.","Cross-reference the DC-link energy path and front-end control interfaces.","Add the selected device or circuit documentation revision, power/reference connections and project signal convention."],"distinction":"An AFE differs from a passive diode bridge; bidirectional operation and power-factor behaviour depend on the actual system/control implementation.","facts":[{"label":"Common schematic mnemonic","value":"AFE — descriptive only; project/device documentation defines reference designations."},{"label":"Terminal / interface focus","value":"The AC connection, coupling inductors/filter and active switching bridge"},{"label":"Artwork scope","value":"Original conceptual topology block; not a complete switch-level circuit."}],"references":[{"sourceId":"pub-electronics-infineon-inverter","relevance":"Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored."}],"related":["three-phase-bridge-rectifier","power-converter"],"artwork":"electronics-power-afe","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/active-front-end-rectifier","illustration":"https://eloragrid.ai/library/illustrations/active-front-end-rectifier.svg"}],"sources":[{"id":"iec-diagrams","title":"IEC graphical symbols for diagrams","publisher":"IEC","url":"https://tc3.iec.ch/tc-activity/graphical-symbols-for-diagrams/","type":"standard","scope":"IEC 60617 and related symbol-design publications. Full database access requires a subscription.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"ieee-315","title":"IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams","publisher":"IEEE Standards Association","url":"https://standards.ieee.org/ieee/315/515/","type":"standard","scope":"Graphic symbols and designation letters. IEEE lists this edition as Inactive-Reserved; it is a historical reference, not a claim of current compliance.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"ieee-functions","title":"IEEE C37.2-2022: power-system device function numbers","publisher":"IEEE","url":"https://ieeexplore.ieee.org/document/9984140","type":"standard","scope":"Device function numbers, acronyms and contact designations. The full publication may require access through IEEE.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"iec-rights","title":"IEC copyright and database reproduction conditions","publisher":"IEC","url":"https://webstore.iec.ch/copyright","type":"licensing","scope":"Distinguishes engineering use from reproduction of IEC publications and substantial database replication.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"autodesk-index","title":"IEC-60617 symbol preview directory","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7871E6EF-24D5-467E-9B74-321FEDC9DFDA.htm","type":"cad-reference","scope":"Public reference directory of named symbol categories. Vendor graphics and CAD library files are not redistributed here.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"autodesk-ct","title":"Current transformer symbol variants","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-40AAEF4A-AC3F-4B3D-90A5-A9E0707C1241.htm","type":"cad-reference","scope":"Current transformers, secondaries and conductor indications; vendor block identifiers are distinct from IEC symbol identifiers.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"autodesk-contacts","title":"Relays and contacts: public symbol reference","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-011C62B8-9EC8-485C-B47D-B22A3F7B7574.htm","type":"cad-reference","scope":"Normally open, normally closed and changeover contacts, relay coils and latching relay variants.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"autodesk-pushbuttons","title":"Pushbutton contact and actuator variants","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-9E8890C7-7176-47DD-8700-E02A16C1670E.htm","type":"cad-reference","scope":"Momentary and latching pushbuttons, normal contact states and mushroom actuators.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"autodesk-lamps","title":"Pilot lights: public symbol reference","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-BBCEBBBA-24AD-4D3A-B106-39550AAACA6C.htm","type":"cad-reference","scope":"Pilot-light and indication variants. A symbol alone does not establish the indicated operating condition.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"autodesk-terminals","title":"Terminal symbol and numbering variants","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-AC31431B-1EB8-492C-8201-B09DE3A4D8A3.htm","type":"cad-reference","scope":"Terminal representations with terminal numbers and wire-number variants.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"autodesk-generators","title":"Generator symbol variants","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-09BE3BB5-9118-4302-8061-3888692E538F.htm","type":"cad-reference","scope":"DC and three-phase synchronous generator categories.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"autodesk-resistors","title":"Resistors and heater-element symbols","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-1D071951-D38E-4B15-8B9E-C30ECBD55C19.htm","type":"cad-reference","scope":"Fixed and variable resistive components, shunts and heater elements.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"autodesk-breakers","title":"Circuit-breaker symbol variants","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-DB1548A3-A4D3-47E5-86AC-37000DC57D80.htm","type":"cad-reference","scope":"Circuit-breaker variants and thermal, magnetic and differential qualifiers.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"autodesk-fuses","title":"Fuse and neutral-link symbols","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-E540AE83-CEE1-4CA9-B43C-B19004025EAA.htm","type":"cad-reference","scope":"Fuses, auxiliary contacts, indication and open/closed neutral-link variants.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"autodesk-transformers","title":"Power, potential and autotransformer symbols","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-C1FE1690-DBF4-4F69-85C4-28E41F0A6392.htm","type":"cad-reference","scope":"Power transformers, voltage transformers, winding counts, screens and autotransformers.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"autodesk-selectors","title":"Selector-switch contact and operating variants","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-E1B4D1DE-C709-4E3E-AF7C-1A8989D096E9.htm","type":"cad-reference","scope":"Maintained and returning selector-switch positions and associated contacts.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"autodesk-motors","title":"Three-phase motor symbol variants","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-385CBE83-33A3-4314-913E-3B59A6D05F22.htm","type":"cad-reference","scope":"Motor variants including asynchronous, synchronous and connection-count differences.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"autodesk-plc","title":"PLC input and output point symbols","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-16A484BE-F73C-4612-8D12-E760E981C4E9.htm","type":"cad-reference","scope":"Input/output point and wiring-count variants. Electrical module specifications are manufacturer-specific.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"autodesk-capacitors","title":"Capacitive component symbols","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-74580D46-0731-41A6-918D-2DB419114207.htm","type":"cad-reference","scope":"Capacitor, electrolytic, feedthrough and adjustable component variants.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"switching-devices","title":"Elementary switching devices","publisher":"Schneider Electric — Electrical Installation Guide","url":"https://www.electrical-installation.org/enwiki/Elementary_switching_devices","type":"manufacturer","scope":"Explains disconnectors, load-break switches, contactors and fuses. The manufacturer diagrams remain at the source.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"breaker-characteristics","title":"Fundamental characteristics of a circuit-breaker","publisher":"Schneider Electric — Electrical Installation Guide","url":"https://www.electrical-installation.org/enwiki/Fundamental_characteristics_of_a_circuit-breaker","type":"manufacturer","scope":"Voltage, current, tripping and breaking-capacity concepts; not a product selection or settings prescription.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"rcd-forms","title":"Form factors of residual-current devices","publisher":"Schneider Electric — Electrical Installation Guide","url":"https://www.electrical-installation.org/enwiki/Form_factors_of_RCDs","type":"manufacturer","scope":"Residual-current functions in different device forms and related product standards.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"instrument-transformers","title":"Indoor current and voltage transformers","publisher":"ABB","url":"https://www.abb.com/gb/en/areas/electrification/medium-voltage/grid-components/core-components/indoor-instrument-transformers","type":"manufacturer","scope":"Public current- and voltage-transformer product families. Ratings, terminals and dimensions depend on the model.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"abb-functions","title":"Relion 620: functions, codes and symbols","publisher":"ABB","url":"https://techdoc.relays.protection-control.abb/r/620-series-IEC-60870-5-103-Point-List-Manual/2.0-FP1-IEC/en-US/Functions-codes-and-symbols","type":"manufacturer","scope":"Published product mappings between function names, IEC 61850 identifiers, IEC mnemonics and ANSI designations. These are product examples, not universal equivalences.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"device-numbers","title":"Public reference table of ANSI device-function numbers","publisher":"Schneider Electric","url":"https://www.se.com/es/es/faqs/FA34639/","type":"manufacturer","scope":"Spanish-language public reference table. Used to check device-number names; no claim that every function is implemented in every device.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"manufacturer-cad","title":"Official CAD drawings and BIM resources","publisher":"Schneider Electric","url":"https://www.se.com/us/en/work/support/resources-and-tools/cad-drawings/","type":"cad-reference","scope":"Manufacturer CAD/BIM directory for model-specific equipment. Download terms remain with the publisher.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"abb-switchgear","title":"Secondary-distribution switchgear and ring main units","publisher":"ABB","url":"https://new.abb.com/medium-voltage/switchgear/secondary-distribution","type":"manufacturer","scope":"Public equipment families for secondary distribution. Footprints and ratings must come from the chosen model.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"terminal-disconnect","title":"Disconnect and knife-disconnect terminal blocks","publisher":"Phoenix Contact","url":"https://www.phoenixcontact.com/en-au/products/terminal-blocks/disconnect-and-knife-disconnect-terminal-blocks","type":"manufacturer","scope":"Public disconnect-terminal products, test access and model-dependent connection characteristics.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"ct-terminals","title":"Transformer terminals for measuring and test circuits","publisher":"Phoenix Contact","url":"https://www.phoenixcontact.com/en-ie/products/terminal-blocks/transformer-terminal-blocks?p=7","type":"manufacturer","scope":"Current-transformer test terminals and leading short-circuit arrangements. Use the selected product's instructions for any intervention.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"transfer-switches","title":"Transfer switch fundamentals","publisher":"Cummins","url":"https://www.cummins.com/sites/default/files/2026-04/2023-sep-transfer-switch-fundamentals.pdf","type":"manufacturer","scope":"Public educational presentation about source transfer. Manufacturer graphics and complete circuits are not redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"generator-controls","title":"Generator switchgear and paralleling controls","publisher":"Cummins","url":"https://www.cummins.com/en-na/generators/products/switchgear","type":"manufacturer","scope":"Public description of generator switchgear, controls and system interfaces.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"energy-storage","title":"Battery energy storage and power conversion","publisher":"Eaton","url":"https://www.eaton.com/sg/en-us/products/energy-storage.html","type":"manufacturer","scope":"Explains battery storage and the power-conversion interface. Product-specific installation requirements remain with the manufacturer.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"battery-cabinets","title":"xStorage battery energy storage system","publisher":"Eaton","url":"https://www.eaton.com/us/en-us/catalog/energy-storage/xstorage-battery-energy-storage-system.html","type":"manufacturer","scope":"Public example of battery cabinets, power conversion and control equipment within a storage system.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"mounting-plates","title":"Enclosure mounting plates","publisher":"Rittal","url":"https://www.rittal.com/com-en/products/PG20231215ZUB101/PG20240403ZUB102/PG20240403ZUB104","type":"manufacturer","scope":"Public mounting-plate accessories and enclosure installation surfaces.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"enclosures","title":"AX enclosure system","publisher":"Rittal","url":"https://webinfo.rittal.com/en/plastic-enclosures-ax","type":"manufacturer","scope":"Public enclosure system with mounting and earthing features. No model-specific dimensions are reproduced here.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"cable-support","title":"Cable tray and ladder systems","publisher":"Eaton","url":"https://www.eaton.com/us/en-us/products/support-systems/cable-tray-and-ladder-systems.html","type":"manufacturer","scope":"Public cable-management families and official support-system resources.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"cable-cad","title":"Cable-support CAD and BIM specifier resources","publisher":"Eaton","url":"https://salesassistant.eaton.com/us/en-us/products/support-systems/b-line-series-cospec-specifier-center/cable-tray-systems-and-supports-cable-management.html","type":"cad-reference","scope":"Official directory of cable-support design content. Assets are linked rather than redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"busbar-trunking","title":"Canalis busbar trunking systems","publisher":"Schneider Electric","url":"https://www.se.com/ww/en/work/products/master-ranges/line-series/","type":"manufacturer","scope":"Public transport and distribution applications for busbar trunking. Select the exact system before using its dimensions.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-function-sel-numbers","title":"ANSI device-number and suffix reference table","publisher":"Schweitzer Engineering Laboratories","url":"https://selinc.com/pt/products/tables/ansi/","type":"manufacturer","scope":"Public Portuguese-language base-number and application-suffix table. Used to cross-check public number associations. Application-specific and historical labels need the selected drawing legend; this table is not a substitute for the licensed IEEE standard.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-function-abb-secogear","title":"SecoGear medium-voltage switchgear application and technical guide, DET-882","publisher":"ABB","url":"https://library.e.abb.com/public/a06cf4cf38b34800b27bb337ab12f74f/DET-882%20SecoGear%205kV-15kV%20IEEE%20Metal%20Clad%20Switchgear_Application%20and%20installation%20guide.pdf","type":"manufacturer","scope":"Public switchgear application guide with a device-number reference table. Used to cross-check 54, 61, 62 and specialist labels. Text, photographs and manufacturer diagrams are linked only and are not redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-function-abb-mappings","title":"Relion 620 series: published protection function and designation mappings","publisher":"ABB","url":"https://techdoc.relays.protection-control.abb/r/620-series-IEC-60870-5-103-Point-List-Manual/2.0-FP1-IEC/en-US/Functions-codes-and-symbols","type":"manufacturer","scope":"Manufacturer mapping of function names, IEC identifiers and ANSI labels. These are examples for a documented product family, not universal equivalences between standards or products.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-function-eaton-transformer","title":"ETR-4000 and ETR-5000 transformer protection function tables","publisher":"Eaton","url":"https://www.eaton.com/us/en-us/catalog/electrical-circuit-protection/transformer-relays.html","type":"manufacturer","scope":"Public transformer-relay mappings including restrained/unrestrained differential, restricted ground differential, main and auxiliary voltage inputs, and measured/calculated earth-current inputs.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-function-eaton-motor","title":"EMR motor protection: public function comparison","publisher":"Eaton","url":"https://www.eaton.com/us/en-us/catalog/electrical-circuit-protection/motor-relays.html","type":"manufacturer","scope":"Public motor-relay application mappings including jam/stall protection, current input variants, breaker failure and motor differential. Suffix interpretation applies to the cited family.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-function-eaton-generator","title":"EGR-5000 generator protection: public function overview","publisher":"Eaton","url":"https://www.eaton.com/us/en-us/catalog/electrical-circuit-protection/generator-relays.html","type":"manufacturer","scope":"Public generator-relay application reference. Detailed protection function mapping is also published in the E-Series brochure; naming does not establish the selected device configuration.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-function-eaton-brochure","title":"E-Series protective relays: public family comparison brochure","publisher":"Eaton","url":"https://www.eaton.com/content/dam/eaton/products/electrical-circuit-protection/protective-relays-and-predictive-devices/e-series-protective-relays-br026001en.pdf","type":"manufacturer","scope":"Public function-name and suffix mappings across feeder, motor, transformer and generator relays. Linked as documentation only; no illustrations or product drawings are copied.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-function-sel-generator","title":"Generator protection feature and function comparison","publisher":"Schweitzer Engineering Laboratories","url":"https://selinc.com/products/comparisons/generator-protection/","type":"manufacturer","scope":"Public mappings for generator functions, including phase distance, field/stator ground, thermal RTD, sequence-current and vector-shift applications. Product availability depends on model/options; no settings are provided here.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-function-sel-distance","title":"SEL-321 phase and ground distance relay documentation","publisher":"Schweitzer Engineering Laboratories","url":"https://selinc.com/products/321/docs/","type":"manufacturer","scope":"Manufacturer documentation landing page for phase and ground distance protection. The legacy product is referenced to explain the measurement roles, not to recommend it for a new project.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-function-sel-line","title":"SEL-411L line differential protection overview","publisher":"Schweitzer Engineering Laboratories","url":"https://selinc.com/products/411l/","type":"manufacturer","scope":"Public explanation of communication-assisted line current differential protection and the associated terminal measurements. Product diagrams and technical papers remain on the publisher site.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-function-sel-product-catalog","title":"SEL 2022 Product and Solution Guide: published protection function tables","publisher":"Schweitzer Engineering Laboratories","url":"https://selinc.com/api/download/136012","type":"manufacturer","scope":"Public historical product guide documenting 21P phase distance and 21G ground distance mappings among other line-protection functions. Referenced for terminology, not current product availability or a product recommendation.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-illuminated-pushbuttons","title":"AutoCAD Electrical: Illuminated push buttons","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7B13B543-97A4-4A7E-8D08-49386A153A33.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-selector-three","title":"AutoCAD Electrical: Three-position selectors","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-D8675B9D-9CBF-4B7F-8F09-2444779614D0.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-selector-four","title":"AutoCAD Electrical: Four-position selectors","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-09243080-0BE8-4401-8E79-11156DF1CDDF.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-additional-breaker-poles","title":"AutoCAD Electrical: Additional circuit-breaker poles","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-8B9070E1-A978-429D-A552-27BEFAE1C60E.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-power-switches","title":"AutoCAD Electrical: Power semiconductor switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-54E4231E-F794-4527-9104-C2D7BA312077.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-fused-disconnects","title":"AutoCAD Electrical: Fusible disconnects","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-FE7E6B30-F585-41F4-9F66-215ACD95A36D.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-disconnect-variants","title":"AutoCAD Electrical: Disconnector variants","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-745AF70A-8A25-4729-AAB7-408A61929B9E.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-reactors","title":"AutoCAD Electrical: Reactors and inductors","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-BAD50DBF-0951-44A0-BB4C-A57B4A4ED895.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-fuse-switches","title":"AutoCAD Electrical: Fuse switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-D9CE1F87-4B4C-40C7-9C9E-0136BD2A199C.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-three-phase-transformers","title":"AutoCAD Electrical: Three-phase transformer connections","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-EB13DB13-01EE-4541-BED7-19B9001BE8FC.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-relay-suppression","title":"AutoCAD Electrical: Relay suppression components","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-AF7C83A4-33F4-4144-94BE-4C5F2F448FB8.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-current-relays","title":"AutoCAD Electrical: Current monitoring relays","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-E0DDA638-4664-4F1E-B191-29A4C40C4A0A.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-voltage-relays","title":"AutoCAD Electrical: Voltage monitoring relays","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-5296749E-9336-4B07-9956-160963D6C848.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-counters","title":"AutoCAD Electrical: Counter relays","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-EDA5C048-228A-4ABF-B77B-D305F4BB656A.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-monitoring-relays","title":"AutoCAD Electrical: Miscellaneous monitoring relays","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-31F4CF79-F8E0-4E5A-8C51-4D71640ACDB8.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-timers","title":"AutoCAD Electrical: Time-delay relays","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-DA927086-EEAF-48CB-B9B1-634A4B48C8C7.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-motor-control","title":"AutoCAD Electrical: Motor control and overloads","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-D74101D4-8702-418C-B349-B15EEAEFAA20.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-single-phase-motors","title":"AutoCAD Electrical: Single-phase motors","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-F82048DA-0D71-4720-B9F7-3E64B7500E76.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-dc-motors","title":"AutoCAD Electrical: DC motors","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-F5F3061F-E0DE-4A9A-BE88-C017545A9A36.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-transformer-lights","title":"AutoCAD Electrical: Transformer-fed indicator lamps","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-CCA59550-27D3-4BC0-B576-617C8934EC2B.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-test-lights","title":"AutoCAD Electrical: Push-to-test lamps","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-E8F5DC0C-5637-4A7D-B5EF-6981BAE76E94.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-led-lights","title":"AutoCAD Electrical: LED lamps","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-B4FB8955-5135-4123-A293-11530B9D25EC.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-flashing-beacons","title":"AutoCAD Electrical: Flashing beacons","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-386067DE-60EA-4653-B9B9-3F88948B35C0.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-rotating-beacons","title":"AutoCAD Electrical: Rotating beacons","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-DCC7BD42-5E3B-4F5E-88F9-4ACC6BDB9D43.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-connectors","title":"AutoCAD Electrical: Connectors","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7175D293-9F4C-485C-8E2D-DE684820D53B.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-limits","title":"AutoCAD Electrical: Limit switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-3CF4BE45-A302-4757-B5C9-C1AFF9BDC512.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-pressure-temperature","title":"AutoCAD Electrical: Pressure and temperature switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-46061E42-55B7-4804-8D50-C31DF292F01D.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-inductive-sensors","title":"AutoCAD Electrical: Inductive proximity switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-596652AB-6555-4F9A-B575-555D40C2ECD4.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-capacitive-sensors","title":"AutoCAD Electrical: Capacitive proximity switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-F2CC4639-9203-4C6A-8A9F-2A32717D2BE3.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-magnetic-sensors","title":"AutoCAD Electrical: Magnetic proximity switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-B80666C6-215A-40C9-93CD-F394C29C3D33.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-optical-sensors","title":"AutoCAD Electrical: Photoelectric emitter/receiver switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-15ABE47A-723F-4004-BF2A-9CC285DE7882.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-misc-switches","title":"AutoCAD Electrical: Level, flow, keyed and measurement switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-1FB94435-C954-4479-BD97-25796DB8F728.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-instrumentation","title":"AutoCAD Electrical: Instrumentation and sensors","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-773A36C3-44C6-43EB-9BD0-E0297816B9B2.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-windings","title":"AutoCAD Electrical: Winding arrangements and AC/DC indications","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-3F5A759D-872A-4990-8AAE-7CCAFBBBD4C5.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-pv-generator","title":"AutoCAD Electrical: Photovoltaic generator representation","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-B290927E-1008-47FA-9D29-3C3149A5382A.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-semiconductors","title":"AutoCAD Electrical: Semiconductor components","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-AC954072-7314-4682-88AF-38160D61E9A2.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-earthing-surge","title":"AutoCAD Electrical: Earthing, sources and surge protection","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-1E3FDEAE-B4B2-417C-8075-108AA2C6E509.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-splices","title":"AutoCAD Electrical: Splice symbols","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-4853BC4B-36BF-44A7-A73C-A95A3A4C58EA.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-station-types","title":"AutoCAD Electrical: Power station and substation concepts","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-74EF80E8-018D-4A57-88BD-FF973F1B8185.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-one-line-load","title":"AutoCAD Electrical: One-line load and receptacle","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-AF38B0E2-9CF4-4F69-9C2B-09D542998ED7.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-rcd-categories","title":"Residual current device categories","publisher":"Schneider Electric","url":"https://www.se.com/au/en/faqs/FAQ000218859/","type":"manufacturer","scope":"Public manufacturer explanation of the equipment function and selection context.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-breaker-types","title":"Circuit breakers and switches","publisher":"Schneider Electric","url":"https://www.se.com/au/en/product-category/4200-circuit-breakers-and-switches/","type":"manufacturer","scope":"Public manufacturer explanation of the equipment function and selection context.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-terminal-families","title":"Terminal block functional families","publisher":"Phoenix 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context.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-ups-functions","title":"DC UPS, AC UPS and capacitor buffer modules","publisher":"Phoenix Contact","url":"https://www.phoenixcontact.com/en-gb/products/uninterruptible-power-supplies-ups","type":"manufacturer","scope":"Public manufacturer explanation of the equipment function and selection context.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-pv-system","title":"PV system equipment and string connection layouts","publisher":"Schneider Electric","url":"https://www.electrical-installation.org/enwiki/Photovoltaic_system%3A_electrical_equipments_selection","type":"manufacturer","scope":"Public manufacturer explanation of the equipment function and selection context.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-pv-inverter","title":"Photovoltaic technology and inverter functions","publisher":"Schneider Electric","url":"https://www.electrical-installation.org/enwiki/Photovoltaic_background%2C_technology","type":"manufacturer","scope":"Public manufacturer explanation of the equipment function and selection context.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-earth-fault","title":"Residual current and neutral-earthing protection context","publisher":"ABB","url":"https://new.abb.com/medium-voltage/digital-substations/campaigns/earth-fault-protection-portfolio/earth-fault-offering","type":"manufacturer","scope":"Public manufacturer explanation of the equipment function and selection context.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-digital-io","title":"Modicon TM3 digital I/O hardware guide","publisher":"Schneider Electric","url":"https://www.se.com/ca/en/download/document/EIO0000003125/","type":"manufacturer","scope":"Public manufacturer explanation of the equipment function and selection context.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-analog-io","title":"Modicon TM3 analog I/O hardware guide","publisher":"Schneider Electric","url":"https://www.se.com/us/en/download/document/EIO0000003131/","type":"manufacturer","scope":"Public manufacturer explanation of the equipment function and selection context.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-energy-meter","title":"Power and energy measurement quantities","publisher":"Schneider Electric","url":"https://www.se.com/ph/en/faqs/FA343278/","type":"manufacturer","scope":"Public manufacturer explanation of the equipment function and selection context.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-signal-isolator","title":"Analog current signal isolation","publisher":"Phoenix Contact","url":"https://www.phoenixcontact.com/en-us/products/signal-conditioner-mcr-c-i-i-0b-0b-dci-2810955","type":"manufacturer","scope":"Public manufacturer explanation of the equipment function and selection context.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-symbol-temperature-input","title":"RTD and thermocouple temperature transducer inputs","publisher":"Phoenix Contact","url":"https://www.phoenixcontact.com/en-gb/products/temperature-measuring-transducer-macx-mcr-1ts-i-olp-1145192?type=pdf","type":"manufacturer","scope":"Public manufacturer explanation of the equipment function and selection context.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-phoenix-products","title":"Control cabinet components and automation products","publisher":"Phoenix Contact","url":"https://www.phoenixcontact.com/en-au/products","type":"manufacturer","scope":"Public component categories for supply, control, communication, protection and connection; no exact-model ratings are inferred.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-phoenix-terminals","title":"Terminal-block types and assembly accessories","publisher":"Phoenix Contact","url":"https://www.phoenixcontact.com/en-gb/products/terminal-blocks","type":"manufacturer","scope":"Public terminal-block categories and manufacturer assembly information; selected product documentation controls dimensions and connection details.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-ad-drawings","title":"Official product-line CAD drawing index","publisher":"AutomationDirect","url":"https://support.automationdirect.com/docs/drawings.html","type":"cad-reference","scope":"Manufacturer/supplier index identifies the named product lines. Only product identity and links are used; archives, drawings and vendor copyright material are not reproduced.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-fuji-cad","title":"Distribution and control: official CAD data","publisher":"Fuji Electric Corp. of America","url":"https://americas.fujielectric.com/products/power-distribution-control/distribution-control-support/cad-data/","type":"cad-reference","scope":"Official Americas product-family and model listing. Consult exact catalogue number and current regional availability; vendor drawings remain at the source.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-tdk-cad","title":"TDK-Lambda official mechanical drawing catalogue","publisher":"TDK-Lambda","url":"https://www.emea.lambda.tdk.com/uk/technical-data/data?resource=3D-Drawings","type":"cad-reference","scope":"Official model and family names in the drawing catalogue. A shared outline for xx output variants does not establish an exact voltage variant.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-tdk-din","title":"DIN-rail power supply, buffer, redundancy and UPS families","publisher":"TDK-Lambda","url":"https://www.emea.lambda.tdk.com/uk/products/din-rail","type":"manufacturer","scope":"Public functional classification of DIN-rail product families; exact model selection and technical values remain in the data sheet.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-puls-qs","title":"QS20.241 DIN-rail power supply","publisher":"PULS","url":"https://products.pulspower.com/us/qs20-241.html","type":"manufacturer","scope":"Official QS20.241 product information and manufacturer drawing resources.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-schneider-ranges","title":"Official product ranges A–Z","publisher":"Schneider Electric","url":"https://www.se.com/uk/en/product-range-az/","type":"manufacturer","scope":"UK public range identity and product-family links, including legacy flags. Publication here does not imply availability or approvals in another country.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-micom-cad","title":"MiCOM official CAD drawing collection","publisher":"Schneider Electric","url":"https://www.se.com/au/en/download/document/MiCOM-CAD-DRAWINGS/","type":"cad-reference","scope":"Official public relay-family CAD resource. Existing and current MiCOM variants must be distinguished by model and document revision.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-count-abb-lv","title":"ABB low-voltage switchgear portfolio","publisher":"ABB","url":"https://www.abb.com/global/en/areas/electrification/low-voltage/power-distribution-systems/switchgear","type":"manufacturer","scope":"Public low-voltage assembly family descriptions. Project configuration determines footprint and enclosure interfaces.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-abb-unigear","title":"UniGear medium-voltage switchgear portfolio","publisher":"ABB","url":"https://www.abb.com/global/en/areas/electrification/medium-voltage/switchgear/air-insulated/unigear","type":"manufacturer","scope":"Official primary-distribution air-insulated switchgear family; no project-specific layout or dimensions reproduced.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-eaton-fundamentals","title":"Low-voltage switchgear compartment fundamentals","publisher":"Eaton","url":"https://www.eaton.com/ph/en-us/products/low-voltage-power-distribution-control-systems/switchgear-lv/low-voltage-switchgear-fundamentals---eaton.html","type":"manufacturer","scope":"Public descriptions of breaker, bus and cable compartments. Illustrations here are independent spatial concepts.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-cummins-application","title":"T-030 liquid-cooled generator set application manual","publisher":"Cummins","url":"https://www.cummins.com/sites/default/files/2024-08/t030-Liquid-cooled-gen-set-application-manual.pdf","type":"manufacturer","scope":"Public manufacturer application manual, Issue 9, February 2015; context for generator integration. Current selected-generator documentation and applicable regulations control implementation.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-victron-support","title":"Official Victron product documentation directory","publisher":"Victron Energy","url":"https://www.victronenergy.com/support","type":"manufacturer","scope":"Public names and official product/manual resources for inverter, charger, storage, metering and control families. Product suitability and installation geometry require selected-model documentation.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-greenheck-products","title":"Ventilation product families","publisher":"Greenheck","url":"https://www.greenheck.com/shop/products","type":"manufacturer","scope":"Public fans, louvers, dampers and ventilation categories. Airflow, pressure, fire performance and dimensions are project and product specific.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-greenheck-aircontrol","title":"Air-control product categories","publisher":"Greenheck","url":"https://www.greenheck.com/products/air-conditioning/ChangeLanguage","type":"manufacturer","scope":"Official product navigation for fire/smoke/backdraft/control dampers and louvers; classification links are not certification claims.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-invertek-eco","title":"Optidrive Eco official support resources","publisher":"Invertek Drives","url":"https://www.invertekdrives.com/variable-frequency-drives/optidrive-eco/support-resources","type":"cad-reference","scope":"Official variable-frequency-drive family resources and frame-dependent CAD packages.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-nhp-tembreak","title":"Legacy TemBreak 1 product and family drawings","publisher":"NHP Electrical Engineering Products","url":"https://www.nhp.com.au/product/tl1250ne12503fc","type":"manufacturer","scope":"Official Australian supplier page and linked TemBreak 1 family assets. Legacy product listing, not a recommendation for new procurement.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-tempower","title":"TemPower official air-breaker outline CAD catalogue","publisher":"Terasaki Electric","url":"https://www.terasaki.co.jp/english/business/download/technical/tempower.html","type":"cad-reference","scope":"Manufacturer outline-drawing resource for TemPower AT air circuit-breaker configurations; exact breaker, poles and installation method must be selected.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-engineering-design","title":"Electrical installation design methodology and references","publisher":"Schneider Electric — Electrical Installation Guide","url":"https://www.electrical-installation.org/enwiki/General_rules_of_electrical_installation_design","type":"manufacturer","scope":"Public design context. No universal working clearance, equipment dimension or project compliance conclusion is asserted.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-victron-multiplus-ii","title":"MultiPlus-II official product and documents","publisher":"Victron Energy","url":"https://www.victronenergy.com/inverters-chargers/multiplus-ii","type":"manufacturer","scope":"Public product-family identity and official mechanical/document resources; no vendor geometry reproduced.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-victron-quattro","title":"Quattro official product and documents","publisher":"Victron Energy","url":"https://www.victronenergy.com/inverters-chargers/quattro","type":"manufacturer","scope":"Public product-family identity and official mechanical/document resources; no vendor geometry reproduced.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-victron-smartsolar-mppt-rs","title":"SmartSolar MPPT RS official product and documents","publisher":"Victron Energy","url":"https://www.victronenergy.com/solar-charge-controllers/smartsolar-mppt-rs-450-tr","type":"manufacturer","scope":"Public product-family identity and official mechanical/document resources; no vendor geometry reproduced.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-victron-cerbo-gx","title":"Cerbo GX official product and documents","publisher":"Victron Energy","url":"https://www.victronenergy.com/communication-centres/cerbo-gx","type":"manufacturer","scope":"Public product-family identity and official mechanical/document resources; no vendor geometry reproduced.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-victron-lynx-distributor","title":"Lynx Distributor official product and documents","publisher":"Victron Energy","url":"https://www.victronenergy.com/dc-distribution-systems/lynx-distributor","type":"manufacturer","scope":"Public product-family identity and official mechanical/document resources; no vendor geometry reproduced.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-victron-lynx-smart-bms-ng","title":"Lynx Smart BMS NG official product and documents","publisher":"Victron Energy","url":"https://www.victronenergy.com/battery-management-systems/lynx-smart-bms-ng","type":"manufacturer","scope":"Public product-family identity and official mechanical/document resources; no vendor geometry reproduced.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-victron-lithium-ng-batteries","title":"Lithium NG Batteries official product and documents","publisher":"Victron Energy","url":"https://www.victronenergy.com/batteries/lithium-ng-batteries","type":"manufacturer","scope":"Public product-family identity and official mechanical/document resources; no vendor geometry reproduced.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-victron-smartshunt","title":"SmartShunt official product and documents","publisher":"Victron Energy","url":"https://www.victronenergy.com/battery-monitors/smart-battery-shunt","type":"manufacturer","scope":"Public product-family identity and official mechanical/document resources; no vendor geometry reproduced.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-victron-skylla-ip65","title":"Skylla-IP65 official product and documents","publisher":"Victron Energy","url":"https://www.victronenergy.com/chargers/skylla-ip65","type":"manufacturer","scope":"Public product-family identity and official mechanical/document resources; no vendor geometry reproduced.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-victron-multi-rs-solar","title":"Multi RS Solar official product and documents","publisher":"Victron Energy","url":"https://www.victronenergy.com/inverter-charger-mppt/multi-rs-solar","type":"manufacturer","scope":"Public product-family identity and official mechanical/document resources; no vendor geometry reproduced.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-victron-multiplus-ii-2x-120v","title":"MultiPlus-II 2x 120V official product and documents","publisher":"Victron Energy","url":"https://www.victronenergy.com/inverters-chargers/multiplus-ii-2x-120v","type":"manufacturer","scope":"Public product-family identity and official mechanical/document resources; no vendor geometry reproduced.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-victron-din35-adapter","title":"DIN35 adapter official product and documents","publisher":"Victron Energy","url":"https://www.victronenergy.com/accessories/din35-adapter-small","type":"manufacturer","scope":"Public product-family identity and official mechanical/document resources; no vendor geometry reproduced.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-deif-ie250","title":"iE 250 controller documentation","publisher":"DEIF","url":"https://www.deif.com/documentation/ie-250","type":"manufacturer","scope":"Official controller and iE local display documentation. Verify base/front mounting and installed I/O options before selecting the drawing.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-westermo-ps260","title":"PS2-60 power supply support","publisher":"Westermo","url":"https://www.westermo.com/us/support/product-support/ps-260","type":"manufacturer","scope":"Official support page names the device PS2-60; the URL slug ps-260 is not used as an alternate model number.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-westermo-lynx5612","title":"Lynx 5612-E-F4G-T8G-LV support","publisher":"Westermo","url":"https://www.westermo.com/de/support/product-support/lynx-5612-e-f4g-t8g-lv","type":"manufacturer","scope":"Official model-specific industrial switch support and mechanical resources.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-dagartech-bgpsw-15-st","title":"BGPSW 15 ST official generator-set configuration","publisher":"Dagartech","url":"https://www.dagartech.com/en/generator-sets/bgpsw-15-st-480-277v/","type":"manufacturer","scope":"Public configuration identity and manufacturer document route; ratings and dimensions are not copied into the generic drawing preview.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-dagartech-dgb-415-st","title":"DGB 415 ST official generator-set configuration","publisher":"Dagartech","url":"https://www.dagartech.com/en/generator-sets/dgb-415-st-400-230v/","type":"manufacturer","scope":"Public configuration identity and manufacturer document route; ratings and dimensions are not copied into the generic drawing preview.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-greenheck-fans","title":"Industrial fan product families","publisher":"Greenheck","url":"https://www.greenheck.com/products/fans","type":"manufacturer","scope":"Official named fan families. Dimensions, operating duty and mounting options are selected per size and configuration.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-greenheck-wallfans","title":"Sidewall fan families","publisher":"Greenheck","url":"https://www.greenheck.com/products/fans/wall","type":"manufacturer","scope":"Official wall-mounted fan names and arrangements; no airflow ratings or certification claims are inferred.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-greenheck-louvers","title":"Stationary louver families","publisher":"Greenheck","url":"https://www.greenheck.com/products/louvers/conventional-stationary","type":"manufacturer","scope":"Official ESD louver identities; aperture, drainage, free area and installation are model and size specific.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-greenheck-louvercad","title":"Official louver CAD directory","publisher":"Greenheck","url":"https://www.greenheck.com/resources/drawings/louvers","type":"manufacturer","scope":"Official AFL-501 and related model drawing routes. Vendor CAD remains on the manufacturer site.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-greenheck-dampers","title":"Official damper CAD directory","publisher":"Greenheck","url":"https://www.greenheck.com/resources/drawings/dampers","type":"manufacturer","scope":"Official named fire/smoke damper drawing routes; selected installation and approvals must be checked.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-greenheck-fsd311","title":"FSD-311 combination fire-smoke damper","publisher":"Greenheck","url":"https://www.greenheck.com/products/dampers/combination-fire-smoke/fsd-311","type":"manufacturer","scope":"Public model identity, product documentation and installation resources. No certification of an external project is implied.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-postglover-ng","title":"Neutral grounding resistor and transformer resources","publisher":"Post Glover","url":"https://www.postglover.com/literature-library/","type":"manufacturer","scope":"Official neutral-grounding equipment classification and installation references; no generic enclosure is presented as a verified product outline.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-greenheck-fan-selection","title":"Fan selection reference guide","publisher":"Greenheck","url":"https://content.greenheck.com/public/DAMProd/Original/10002/Fan_Selection_Guide.pdf","type":"manufacturer","scope":"Official named fan families, including inline and axial arrangements; model names only, no copied drawings or performance tables.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"pub-object-greenheck-fd150","title":"FD-150 static-rated fire damper","publisher":"Greenheck","url":"https://www.greenheck.com/products/dampers/fire/fd-150","type":"manufacturer","scope":"Official FD-150 identity and selected installation documents. The educational envelope supplies no fire rating or dimensional certification.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"public-cable-joints","title":"Elastimold underground cable accessories","publisher":"ABB","url":"https://www.abb.com/global/en/areas/electrification/medium-voltage/cable-accessories-connectors/underground/elastimold/underground","type":"manufacturer","scope":"Manufacturer overview of separable connections, cable joints, terminations, grounding and underground cable accessories. Product selection remains application-specific.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"public-power-quality-meter","title":"PowerLogic ION9000 user manual","publisher":"Schneider Electric","url":"https://www.se.com/us/en/download/document/26719674/","type":"manufacturer","scope":"Public manufacturer documentation for the installation, operation and configuration of an advanced energy and power-quality meter. Exact functions and terminals depend on the selected model.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"public-cvt-cpb","title":"CPB capacitor voltage transformer","publisher":"Hitachi Energy","url":"https://www.hitachienergy.com/uk-ie/en/products-and-solutions/instrument-transformers/voltage-transformers/cpb-72-800-kv","type":"manufacturer","scope":"Public manufacturer description of a capacitor voltage transformer for high-voltage metering, protection and power-line carrier applications. Exact model data remains with the publisher.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"public-cvt-working-principle","title":"CCV/CVT and coupling capacitors brochure","publisher":"GE Vernova","url":"https://www.gevernova.com/grid-solutions/sites/default/files/2025-09/CCV-CVT-And-CC-Coupling-Capacitors-Brochure-EN-N50166-Hybrid-202505-R002.pdf","type":"manufacturer","scope":"Public explanation of capacitive sections, electromagnetic unit, terminal arrangements and the distinction from a coupling capacitor. Original publisher graphics are not reproduced.","checkedOn":"2026-10-13","reuse":"link-only"},{"id":"ansi-autodesk-7f08a484-0517-4954-bd68-1648ddbc84a1","title":"Autodesk IEEE Symbol Preview — 1 Pole Circuit Breakers","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7F08A484-0517-4954-BD68-1648DDBC84A1.htm","type":"cad-reference","scope":"Verified public IEEE-oriented vendor catalogue. Block names identify vendor symbols, not IEEE standard symbol numbers. Linked only; graphics and CAD files are not redistributed. IEEE/ANSI 315-1975 is a historical graphics reference with Inactive-Reserved status; this page does not certify current standards compliance.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"ansi-autodesk-7c62d3de-6494-4cbf-b3cf-3e3da309d6a4","title":"Autodesk IEEE Symbol Preview — Disconnect 1 Pole","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7C62D3DE-6494-4CBF-B3CF-3E3DA309D6A4.htm","type":"cad-reference","scope":"Verified public IEEE-oriented vendor catalogue. Block names identify vendor symbols, not IEEE standard symbol numbers. Linked only; graphics and CAD files are not redistributed. IEEE/ANSI 315-1975 is a historical graphics reference with Inactive-Reserved status; this page does not certify current standards compliance.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"ansi-autodesk-e0fcf25a-b17f-491c-8d62-94980e5de33a","title":"Autodesk IEEE Symbol Preview — Fusible Disconnects","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-E0FCF25A-B17F-491C-8D62-94980E5DE33A.htm","type":"cad-reference","scope":"Verified public IEEE-oriented vendor catalogue. Block names identify vendor symbols, not IEEE standard symbol numbers. Linked only; graphics and CAD files are not redistributed. IEEE/ANSI 315-1975 is a historical graphics reference with Inactive-Reserved status; this page does not certify current standards compliance.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"ansi-autodesk-5cf1e8f7-6883-4c9b-9bb3-6cd1a9339ae5","title":"Autodesk IEEE Symbol Preview — Fuses","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-5CF1E8F7-6883-4C9B-9BB3-6CD1A9339AE5.htm","type":"cad-reference","scope":"Verified public IEEE-oriented vendor catalogue. Block names identify vendor symbols, not IEEE standard symbol numbers. Linked only; graphics and CAD files are not redistributed. IEEE/ANSI 315-1975 is a historical graphics reference with Inactive-Reserved status; this page does not certify current standards compliance.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"ansi-autodesk-7567d050-4515-48d5-8e9f-d037b996d366","title":"Autodesk IEEE Symbol Preview — Fuse Switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7567D050-4515-48D5-8E9F-D037B996D366.htm","type":"cad-reference","scope":"Verified public IEEE-oriented vendor catalogue. Block names identify vendor symbols, not IEEE standard symbol numbers. Linked only; graphics and CAD files are not redistributed. 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No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-ultrasonic","title":"Autodesk IEC-60617 preview: Ultrasonic switch forms","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-06552B8C-FF75-458B-8761-548C5BCED3AA.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-touch","title":"Autodesk IEC-60617 preview: Touch-switch forms","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-E7D3C5F3-D944-485E-A100-18E2C4E0D0E4.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-solenoids","title":"Autodesk IEC-60617 preview: Solenoid actuator and feedback forms","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-A9C3F634-CBD4-4426-8431-1F2AC1B31F7E.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-cable","title":"Autodesk IEC-60617 preview: Cable identification and twisted-pair annotation","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-37A08C35-43A3-484D-B0EB-0BBCBC4BE709.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-receptacles","title":"Autodesk IEC-60617 preview: Single and duplex power-receptacle forms","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7DAEDB03-74FC-47A2-9C50-9164297AA5A3.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-box","title":"Autodesk IEC-60617 preview: Generic device boundary forms","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-BF417AFE-1E1B-42BB-A39E-F75F8CB05DB8.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-crossref","title":"Autodesk IEC-60617 preview: Standalone source and destination cross-references","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-9517DC1C-1B8E-4C09-89EE-433B372FE3ED.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-wire-arrow","title":"Autodesk IEC-60617 preview: Reference-only wire arrows","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-B63E664D-D5DC-4FA9-ACAE-6D9217550C33.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-annunciation","title":"Autodesk IEC-60617 preview: Electroacoustic annunciation forms","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-4602FA60-BECA-4C77-A435-73C8C05E41F7.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-one-connector","title":"Autodesk IEC-60617 preview: One-line connector representation","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-5A9FE181-1895-4CC4-949E-C5D2EF0E37E5.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-one-terminal","title":"Autodesk IEC-60617 preview: One-line terminal representation","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-BF54B7FD-AAE1-4FE2-A8CF-07CFC96BFE5E.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-one-cable","title":"Autodesk IEC-60617 preview: One-line cable-marker representation","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-6664F51C-E2A0-4181-9002-E7F56A835EDB.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-one-bus","title":"Autodesk IEC-60617 preview: One-line bus-tap representation","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-9EC851F1-8B92-428B-A657-5B21B2325C62.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-connector-numbering","title":"Autodesk IEC-60617 preview: Connector forms that change wire numbers","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-DA27EF75-79E8-43E5-A07C-E19CD7738C5C.htm","type":"cad-reference","scope":"Public publisher IEC-context family names and vendor block references. No vendor images or CAD library files are reproduced, and vendor tokens are not presented as verified IEC database identifiers.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-wire-connections","title":"Wire connection dots, crossing gaps and loops","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2020/ENU/AutoCAD-Electrical/files/GUID-936BB8A9-9C01-4AC6-B833-CB97700A7203.htm","type":"cad-reference","scope":"Public drafting-tool documentation. The annotation is a connectivity or identification convention, not a verified IEC standard graphic.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"iec-public-vector-interpretation","title":"Transformer vector-group interpretation in protection application","publisher":"ABB","url":"https://techdoc.relays.protection-control.abb/r/SSC600-and-SSC600-SW-Technical-Manual/1.5/en-US/TR2PTDF-Operation-principle?contentId=_tVeRElk4P5wHpFgF2sYvw","type":"manufacturer","scope":"Public manufacturer technical context distinguishes transformer winding types, clock numbers and measurement compensation. Used for interpretation, not to supply protection settings or a standard database graphic.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-adi-adc","title":"AD4682 — analogue-to-digital conversion","publisher":"Analog Devices","url":"https://www.analog.com/en/products/ad4682.html","type":"manufacturer","scope":"Public component description and documentation for analogue-to-digital conversion. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-adi-comparator","title":"TLV3201 — voltage comparison","publisher":"Texas Instruments","url":"https://www.ti.com/product/TLV3201","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of voltage comparison. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-adi-current-sense","title":"AD8418 — shunt-current sensing","publisher":"Analog Devices","url":"https://www.analog.com/en/products/ad8418.html","type":"manufacturer","scope":"Public component description and documentation for shunt-current sensing. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-adi-dac","title":"AD5686R — digital-to-analogue conversion","publisher":"Analog Devices","url":"https://www.analog.com/en/products/ad5686r.html","type":"manufacturer","scope":"Public component description and documentation for digital-to-analogue conversion. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-adi-difference","title":"AD8276 — difference amplification","publisher":"Analog Devices","url":"https://www.analog.com/en/products/ad8276.html","type":"manufacturer","scope":"Public component description and documentation for difference amplification. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-adi-ina","title":"AD620 — instrumentation amplification","publisher":"Analog Devices","url":"https://www.analog.com/en/products/ad620.html","type":"manufacturer","scope":"Public component description and documentation for instrumentation amplification. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-adi-multiplier","title":"AD633 — analogue multiplication","publisher":"Analog Devices","url":"https://www.analog.com/en/products/ad633.html","type":"manufacturer","scope":"Public component description and documentation for analogue multiplication. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-adi-opamp","title":"ADA4522-1 — operational amplification","publisher":"Analog Devices","url":"https://www.analog.com/en/products/ada4522-1.html","type":"manufacturer","scope":"Public component description and documentation for operational amplification. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-adi-opamp-tutorials","title":"University tutorials: amplifier configurations and signal processing","publisher":"Analog Devices","url":"https://wiki.analog.com/university/courses/tutorials/index","type":"manufacturer","scope":"Public tutorial index including inverting amplifier, rectification and related analogue function references. Detailed product design must use the underlying selected circuit documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-adi-rms","title":"AD8436 — RMS-to-DC conversion","publisher":"Analog Devices","url":"https://www.analog.com/en/products/ad8436.html","type":"manufacturer","scope":"Public component description and documentation for rms-to-dc conversion. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-adi-sample-hold","title":"AN-1515: sample-and-hold function using an analogue switch","publisher":"Analog Devices","url":"https://www.analog.com/en/resources/app-notes/an-1515.html","type":"manufacturer","scope":"Public application note establishing the sample-and-hold acquisition function. No complete manufacturer example circuit or component values are reproduced.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-adi-series-ref","title":"ADR4525 — series voltage reference","publisher":"Analog Devices","url":"https://www.analog.com/en/products/adr4525.html","type":"manufacturer","scope":"Public component description and documentation for series voltage reference. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-adi-tia","title":"ADA4530-1 — electrometer and current-to-voltage acquisition","publisher":"Analog Devices","url":"https://www.analog.com/en/products/ada4530-1.html","type":"manufacturer","scope":"Public component description and documentation for electrometer and current-to-voltage acquisition. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-adi-vf","title":"AD650 — voltage/frequency conversion","publisher":"Analog Devices","url":"https://www.analog.com/en/products/ad650.html","type":"manufacturer","scope":"Public component description and documentation for voltage/frequency conversion. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-darlington","title":"TIP120/TIP125 complementary Darlington transistor documentation","publisher":"STMicroelectronics","url":"https://www.st.com/resource/en/datasheet/tip120.pdf","type":"manufacturer","scope":"Public manufacturer explanation and diagrams of NPN and PNP compound Darlington devices. Educational geometry is independently drawn; package drawings are not rehosted.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-depletion-mosfet","title":"DN2540 depletion-mode MOSFET documentation","publisher":"Microchip Technology","url":"https://www.microchip.com/en-us/product/DN2540","type":"manufacturer","scope":"Public depletion-mode MOSFET product documentation. Used to distinguish normally-on depletion operation from enhancement devices, without carrying product settings or package dimensions.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-digital-isolator","title":"ISO7741 — capacitive digital isolation","publisher":"Texas Instruments","url":"https://www.ti.com/product/ISO7741","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of capacitive digital isolation. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-efuse","title":"TPS2663 — integrated electronic-fuse power protection","publisher":"Texas Instruments","url":"https://www.ti.com/product/TPS2663","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of integrated electronic-fuse power protection. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-high-side-driver","title":"UCC27714 — high-side and low-side gate drive with bootstrap context","publisher":"Texas Instruments","url":"https://www.ti.com/product/UCC27714","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of high-side and low-side gate drive with bootstrap context. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-hitachi-igct","title":"Integrated gate-commutated thyristor devices","publisher":"Hitachi Energy","url":"https://www.hitachienergy.com/products-and-solutions/semiconductors/integrated-gate-commutated-thyristors-igct","type":"manufacturer","scope":"Public high-power switching device and integrated gate-unit reference. Used as advanced converter context; no product drawings or gate-unit design files are copied.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-hot-swap","title":"LTC4215 — hot-swap power-path control","publisher":"Analog Devices","url":"https://www.analog.com/en/products/ltc4215.html","type":"manufacturer","scope":"Public component description and documentation for hot-swap power-path control. Used to support the functional reference, not to prescribe a circuit or redistribute product diagrams.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ideal-diode","title":"LM74700-Q1 — ideal-diode controller","publisher":"Texas Instruments","url":"https://www.ti.com/product/LM74700-Q1","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of ideal-diode controller. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-infineon-gan","title":"GaN HEMT structure and operating-mode overview","publisher":"Infineon Technologies","url":"https://www.infineon.com/product-information/gan-hemt-structure-architecture-physics-operation","type":"manufacturer","scope":"Public primary explanation of enhancement-mode versus normally-on HEMT behaviour. No claim that a generic MOSFET glyph establishes GaN material or gate limits.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-infineon-igbt","title":"IGBT device families","publisher":"Infineon Technologies","url":"https://www.infineon.com/products/power/igbt","type":"manufacturer","scope":"Public insulated-gate bipolar transistor family documentation. Ratings, antiparallel diode configuration and gate-drive requirements remain device-specific.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-infineon-inverter","title":"Bidirectional three-/single-phase AC/DC PFC and inverter application note","publisher":"Infineon Technologies","url":"https://www.infineon.com/assets/row/public/documents/24/42/infineon-ac-dc-pfc-11-kw-high-efficiency-high-density-bidirectional-three-single-phase-inverter-applicationnotes-en.pdf","type":"manufacturer","scope":"Public application context for actively switched AC/DC and inverter stages. Independent miniature topology illustrations have no copied product-specific values, wiring layouts or control implementation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-infineon-modules","title":"Power semiconductor module families","publisher":"Infineon Technologies","url":"https://www.infineon.com/products/power/modules","type":"manufacturer","scope":"Public module descriptions and topology documentation, including switching-leg and bridge arrangements. No packaged-module terminal map, dimensioned outline or thermal rating is reproduced.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-infineon-npc","title":"Multilevel NPC converter application context","publisher":"Infineon Technologies","url":"https://www.infineon.com/product-information/sic-modules-for-ups-design-and-efficiency-guide","type":"manufacturer","scope":"Public explanation of two-level and neutral-point-clamped converter contexts. The catalogue indicates a split-link/clamping concept; it is not an exact standard circuit or a selected module internal diagram.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-isolated-driver","title":"UCC21750 — isolated gate-driver interfaces","publisher":"Texas Instruments","url":"https://www.ti.com/product/UCC21750","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of isolated gate-driver interfaces. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-jfet-n","title":"J111/J112 JFET chopper transistor documentation","publisher":"onsemi","url":"https://www.onsemi.com/pdf/datasheet/j111-d.pdf","type":"manufacturer","scope":"Public N-channel JFET example and terminal-reference documentation. The generic concept is not a recommendation to use a particular product or historical part.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-jfet-p","title":"JFET master table with explicit P-channel device classification","publisher":"InterFET","url":"https://interfet.com/jfet-master-table/","type":"manufacturer","scope":"Public primary manufacturer table identifying P-channel and N-channel device families. Referenced for device-type evidence; table values and package geometry are not reproduced.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-low-side-driver","title":"UCC27524 — low-side gate-drive interfaces","publisher":"Texas Instruments","url":"https://www.ti.com/product/UCC27524","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of low-side gate-drive interfaces. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-nexperia-diodes","title":"Diode families and public diode documentation","publisher":"Nexperia","url":"https://www.nexperia.com/products/diodes","type":"manufacturer","scope":"Public diode family descriptions including Schottky devices. Only component concepts and links are used; manufacturer illustrations remain on the publisher site.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-nexperia-mosfet","title":"MOSFET families and application documentation","publisher":"Nexperia","url":"https://www.nexperia.com/products/mosfets","type":"manufacturer","scope":"Public MOSFET device and application information, including intrinsic body-diode context. The generic artwork does not establish an accessible bulk terminal or a selected package pinout.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-nexperia-npn","title":"BC847 NPN transistor documentation","publisher":"Nexperia","url":"https://assets.nexperia.com/documents/data-sheet/BC847X_SER.pdf","type":"manufacturer","scope":"Public NPN transistor terminal and component reference. The catalogue supplies no manufacturer package pinout or product-rating substitute.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-nexperia-pnp","title":"BC856/BC857/BC858 PNP transistor documentation","publisher":"Nexperia","url":"https://assets.nexperia.com/documents/data-sheet/BC856_BC857_BC858.pdf","type":"manufacturer","scope":"Public complementary PNP transistor reference. Terminal roles and component polarity are used without copying the datasheet artwork.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-nexperia-tvs","title":"ESD protection and TVS device families","publisher":"Nexperia","url":"https://www.nexperia.com/products/esd-protection-tvs-filtering-and-signal-conditioning","type":"manufacturer","scope":"Public documentation of transient-protection families. The educational entry does not assert a clamping rating or protected-equipment qualification.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-nxp-pin","title":"BAP64-02 silicon PIN diode documentation","publisher":"NXP Semiconductors","url":"https://www.nxp.com/docs/en/data-sheet/BAP64-02.pdf","type":"manufacturer","scope":"Public PIN diode description, terminal roles and RF switching/attenuation context. Product diagrams and device ratings are linked only.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-nxp-varactor","title":"BB181 variable-capacitance diode documentation","publisher":"NXP Semiconductors","url":"https://www.nxp.com/docs/en/data-sheet/BB181.pdf","type":"manufacturer","scope":"Public historical component reference for a variable-capacitance diode, with anode/cathode roles and tuning applications. Used for terminology, not current product availability or a design recommendation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-active-filters","title":"Basic Linear Design, Chapter 8: analogue filter response families","publisher":"Analog Devices","url":"https://www.analog.com/media/en/training-seminars/design-handbooks/Basic-Linear-Design/Chapter8.pdf","type":"manufacturer","scope":"Public primary handbook context for low-pass, high-pass, band-pass and band-rejection responses. The miniature response sketches are original conceptual illustrations, with no claimed cutoff, order or component values.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-analog-mux","title":"CD4051B — analogue channel multiplexing","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/cd4051b.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of analogue channel multiplexing. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-analog-switch","title":"CD4066B — analogue bilateral switching","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/cd4066b.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of analogue bilateral switching. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-cd4017","title":"CD4017B — decoded decade counters","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/cd4017b.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of decoded decade counters. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-cd4046","title":"CD4046B — phase-locked loops and voltage-controlled oscillators","publisher":"Texas Instruments","url":"https://www.ti.com/product/CD4046B","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of phase-locked loops and voltage-controlled oscillators. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-clock","title":"CDCE913 — clock-generation interfaces","publisher":"Texas Instruments","url":"https://www.ti.com/product/CDCE913","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of clock-generation interfaces. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-dab","title":"TIDA-010054: bidirectional dual-active-bridge reference design","publisher":"Texas Instruments","url":"https://www.ti.com/tool/TIDA-010054","type":"manufacturer","scope":"Public DAB system topology and interface reference. Only an independently described functional topology is included; design files, drawings and product ratings remain on the publisher site.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-differentiator","title":"Differentiator circuit reference, SBOA276","publisher":"Texas Instruments","url":"https://www.ti.com/lit/pdf/sboa276","type":"manufacturer","scope":"Public differentiating-amplifier function and bandwidth context. No component values, complete design or manufacturer drawing is copied.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-fda","title":"THS4551 — fully differential amplification","publisher":"Texas Instruments","url":"https://www.ti.com/product/THS4551","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of fully differential amplification. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc00","title":"SN74HC00 — NAND gate logic","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc00.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of nand gate logic. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc02","title":"SN74HC02 — NOR gate logic","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc02.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of nor gate logic. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc04","title":"SN74HC04 — digital inverters","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc04.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of digital inverters. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc08","title":"SN74HC08 — AND gate logic","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc08.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of and gate logic. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc112","title":"SN74HC112 — negative-edge JK flip-flops","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc112.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of negative-edge jk flip-flops. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc123","title":"CD74HC123 — retriggerable monostables","publisher":"Texas Instruments","url":"https://www.ti.com/product/CD74HC123","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of retriggerable monostables. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc125","title":"SN74HC125 — three-state buffers","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc125.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of three-state buffers. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc138","title":"SN74HC138 — binary decoding and demultiplexing","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc138.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of binary decoding and demultiplexing. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc14","title":"SN74HC14 — Schmitt-trigger inverters","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc14.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of schmitt-trigger inverters. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc148","title":"SN74HC148 — priority encoding","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc148.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of priority encoding. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc151","title":"SN74HC151 — digital multiplexing","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc151.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of digital multiplexing. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc163","title":"SN74HC163 — synchronous binary counters","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc163.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of synchronous binary counters. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc164","title":"SN74HC164 — serial-in parallel-out shift storage","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc164.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of serial-in parallel-out shift storage. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc165","title":"SN74HC165 — parallel-load serial shift storage","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc165.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of parallel-load serial shift storage. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc245","title":"SN74HC245 — bidirectional bus transceivers","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc245.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of bidirectional bus transceivers. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc266","title":"SN74HC266 — XNOR gate logic","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc266.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of xnor gate logic. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc283","title":"CD74HC283 — binary full adders","publisher":"Texas Instruments","url":"https://www.ti.com/product/CD74HC283","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of binary full adders. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc32","title":"SN74HC32 — OR gate logic","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc32.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of or gate logic. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc373","title":"SN74HC373 — transparent D latches","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc373.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of transparent d latches. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc393","title":"SN74HC393 — ripple binary counters","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc393.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of ripple binary counters. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc595","title":"SN74HC595 — shift registers with separate output storage","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc595.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of shift registers with separate output storage. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc74","title":"SN74HC74 — positive-edge D flip-flops","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc74.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of positive-edge d flip-flops. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc85","title":"CD74HC85 — digital magnitude comparators","publisher":"Texas Instruments","url":"https://www.ti.com/product/CD74HC85","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of digital magnitude comparators. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-hc86","title":"SN74HC86 — XOR gate logic","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74hc86.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of xor gate logic. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-integrator","title":"Integrator circuit reference, SBOA275","publisher":"Texas Instruments","url":"https://www.ti.com/lit/pdf/sboa275","type":"manufacturer","scope":"Public integrating-amplifier circuit explanation. Educational geometry indicates feedback roles, not a validated buildable implementation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-isolation-amp","title":"AMC1301 — isolated analogue amplification","publisher":"Texas Instruments","url":"https://www.ti.com/product/AMC1301","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of isolated analogue amplification. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-llc","title":"UCC256404 — LLC resonant-converter control","publisher":"Texas Instruments","url":"https://www.ti.com/product/UCC256404","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of llc resonant-converter control. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-ls07","title":"SN74LS07 — open-collector output buffers","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74ls07.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of open-collector output buffers. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-ls279","title":"SN74LS279A — set-reset latches","publisher":"Texas Instruments","url":"https://www.ti.com/product/SN74LS279A","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of set-reset latches. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-ls280","title":"SN74LS280 — odd/even parity generation and checking","publisher":"Texas Instruments","url":"https://www.ti.com/product/SN74LS280","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of odd/even parity generation and checking. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-lvc17","title":"SN74LVC1G17 — non-inverting Schmitt buffers","publisher":"Texas Instruments","url":"https://www.ti.com/product/SN74LVC1G17","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of non-inverting schmitt buffers. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-lvc1t45","title":"SN74LVC1T45 — digital voltage-domain translation","publisher":"Texas Instruments","url":"https://www.ti.com/lit/ds/symlink/sn74lvc1t45.pdf","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of digital voltage-domain translation. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-ota","title":"LM13700 — operational transconductance amplification","publisher":"Texas Instruments","url":"https://www.ti.com/product/LM13700","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of operational transconductance amplification. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-precision-rectifier","title":"Precision full-wave signal rectification reference","publisher":"Texas Instruments","url":"https://www.ti.com/tool/CIRCUIT060058","type":"manufacturer","scope":"Public active signal-rectifier circuit description. Only the function is explained; the manufacturer’s selected complete circuit, values and simulation files are not rehosted.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-shunt-ref","title":"TL431 — programmable shunt references","publisher":"Texas Instruments","url":"https://www.ti.com/product/TL431","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of programmable shunt references. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-topologies","title":"Power topology selection and public topology tutorials","publisher":"Texas Instruments","url":"https://www.ti.com/video/series/power-topology-selection.html","type":"manufacturer","scope":"Public tutorials identifying buck, boost, buck-boost, SEPIC, Cuk, Zeta, flyback, forward, push-pull and bridge conversion arrangements. Catalogue previews are conceptual topology/function blocks, not certified standard glyphs or complete power-stage schematics.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-ti-watchdog","title":"TPS3431 — watchdog timing supervision","publisher":"Texas Instruments","url":"https://www.ti.com/product/TPS3431","type":"manufacturer","scope":"Public device-function and terminal documentation used as an example of watchdog timing supervision. Example part numbers are manufacturer identifiers, not IEC/IEEE symbol IDs. Device ratings, pin numbering and availability remain in the selected product documentation.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-vishay-led","title":"Visible LED component families","publisher":"Vishay","url":"https://www.vishay.com/en/leds/","type":"manufacturer","scope":"Public LED family and component documentation. A bare component reference is distinct from an assembled panel indicator.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-vishay-linear-opto","title":"IL300 linear photodiode optocoupler documentation","publisher":"Vishay","url":"https://www.vishay.com/docs/83622/il300.pdf","type":"manufacturer","scope":"Public optical emitter/detector feedback arrangement. The educational block indicates optical isolation and does not reproduce the dual-detector product pinout or certify linearity.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-vishay-optical","title":"BPW77 silicon NPN phototransistor documentation","publisher":"Vishay","url":"https://www.vishay.com/docs/81527/bpw77n.pdf","type":"manufacturer","scope":"Public detector documentation identifying NPN transistor action and terminal roles. Optical package geometry and measurement curves remain on the publisher site.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-vishay-opto","title":"Optocoupler output-family reference","publisher":"Vishay","url":"https://www.vishay.com/en/optocouplers/","type":"manufacturer","scope":"Public family information for phototransistor and other optocoupler outputs, including application documentation. Isolation ratings and output operating method must be selected from the actual device.","checkedOn":"2026-10-14","reuse":"link-only"},{"id":"pub-electronics-vishay-pv-driver","title":"VOM1271 photovoltaic MOSFET driver documentation","publisher":"Vishay","url":"https://www.vishay.com/docs/83469/vom1271.pdf","type":"manufacturer","scope":"Public photovoltaic optocoupler gate-drive reference. Input/output relationships are described independently; the manufacturer’s circuit diagrams are linked only.","checkedOn":"2026-10-14","reuse":"link-only"}]}