# Elora Grid electrical drafting reference

> 1095 public-source references for symbols, ANSI/IEEE device functions and GA equipment used in switchgear, switchboards, switchrooms and microgrids.

Publisher: Elora Grid
Updated: 2026-10-14

## Scope

Definitions, drawing notes, facts and source links are independently authored. Original educational graphics are not certified standards graphics or product footprints. Third-party CAD and standards remain with their publishers. No confidential drawings or project files are used in this public catalogue.

## Entry access

- HTML: https://eloragrid.ai/library/directory
- JSON catalogue: https://eloragrid.ai/library/catalogue.json
- Search JSON: https://eloragrid.ai/library/search.json?q=CT
- Per entry: /library/entries/{slug}.md and /library/entries/{slug}.json. HTML entry URLs are canonical.

## Symbol conventions

- [IEC forms](https://eloragrid.ai/library/conventions/iec): explicitly identified forms and convention evidence.
- [ANSI / IEEE forms](https://eloragrid.ai/library/conventions/ansi-ieee): graphical forms, distinct from device numbers; public convention evidence and related representations.

## Topics

- [Power distribution](https://eloragrid.ai/library/topics/power-distribution): Switching, protection, transformers and power equipment used in electrical distribution drawings.
- [Metering & protection](https://eloragrid.ai/library/topics/measurement-protection): Instrument transformers, measurement, protection relays and device-function numbers.
- [Control circuits](https://eloragrid.ai/library/topics/control-circuits): Contacts, coils, control devices, timing, interlocking and automation references.
- [Connections & wiring](https://eloragrid.ai/library/topics/connections-wiring): Terminals, conductors, cable systems, connections and earthing references.
- [Equipment layouts](https://eloragrid.ai/library/topics/equipment-layouts): Equipment envelopes, cabinet components and interfaces used in general arrangement drawings.
- [Microgrid systems](https://eloragrid.ai/library/topics/microgrid-systems): Generation, storage, conversion and supporting equipment for microgrid power stations.
- [Electronic components](https://eloragrid.ai/library/topics/electronics-components): Passive components, semiconductor devices and electronic elements used in power conversion, sensing and control schematics.
- [Logic & signals](https://eloragrid.ai/library/topics/logic-signals): Logic gates, signal processing and analogue functions used in control, automation and electronic diagrams.
- [Installation & communications](https://eloragrid.ai/library/topics/installation-communications): Installation, lighting, communication and network symbols used in switchrooms and supporting electrical systems.

## Free official CAD discovery tool

- [Official CAD library](https://eloragrid.ai/tools/cad-library): searchable equipment sources, free project-source exports and manufacturer drawing requests.
- [CAD LLM index](https://eloragrid.ai/tools/cad-library/llms.txt): focused source map, JSON and per-equipment Markdown.
- [Coverage audit](https://eloragrid.ai/tools/cad-library/coverage): 125 entries with acquired CAD/BIM; product-level regional parity remains unverified.

## Manufacturer CAD file directory

- [Search official CAD filenames and part codes](https://eloragrid.ai/library/manufacturer-cad): 6095 public file listings, separate from technical concept counts.
- [CAD file-directory JSON](https://eloragrid.ai/library/manufacturer-cad.json): publisher file URLs and public archive member names; paginated by page/limit, searchable by q/format/publisher; all=1 exports the full metadata. No CAD bytes hosted.
- [AutomationDirect](https://eloragrid.ai/library/manufacturers/automationdirect): 4535 file listings.
- [DEIF](https://eloragrid.ai/library/manufacturers/deif): 7 file listings.
- [Fuji Electric Corp. of America](https://eloragrid.ai/library/manufacturers/fuji-electric-corp-of-america): 212 file listings.
- [Greenheck](https://eloragrid.ai/library/manufacturers/greenheck): 9 file listings.
- [NHP Electrical Engineering Products](https://eloragrid.ai/library/manufacturers/nhp-electrical-engineering-products): 1263 file listings.
- [PULS](https://eloragrid.ai/library/manufacturers/puls): 3 file listings.
- [Victron Energy](https://eloragrid.ai/library/manufacturers/victron-energy): 64 file listings.
- [Westermo](https://eloragrid.ai/library/manufacturers/westermo): 2 file listings.

## References

- [Current transformer (CT)](https://eloragrid.ai/symbols/current-transformer): A current-measurement transformer used with metering and protection equipment. [Markdown](https://eloragrid.ai/library/entries/current-transformer.md)
- [Voltage transformer (VT / PT)](https://eloragrid.ai/symbols/voltage-transformer): A transformer providing a voltage signal for metering or protection. [Markdown](https://eloragrid.ai/library/entries/voltage-transformer.md)
- [Circuit breaker (CB)](https://eloragrid.ai/symbols/circuit-breaker): A switching device that can interrupt a circuit, with specified fault-interruption capability. [Markdown](https://eloragrid.ai/library/entries/circuit-breaker.md)
- [Disconnector (Isolator)](https://eloragrid.ai/symbols/disconnector): A switching device providing an electrical isolation function. [Markdown](https://eloragrid.ai/library/entries/disconnector.md)
- [Load-break switch (LBS)](https://eloragrid.ai/symbols/load-break-switch): A switch with a specified capability to make and break normal load current. [Markdown](https://eloragrid.ai/library/entries/load-break-switch.md)
- [Earthing switch (ES)](https://eloragrid.ai/symbols/earthing-switch): A switch used to connect an identified circuit section to earth. [Markdown](https://eloragrid.ai/library/entries/earthing-switch.md)
- [Fuse (FU)](https://eloragrid.ai/symbols/fuse): An overcurrent protective element that interrupts a circuit by melting its fuse link. [Markdown](https://eloragrid.ai/library/entries/fuse.md)
- [Busbar (Bus)](https://eloragrid.ai/symbols/busbar): A common conductive connection distributing power to connected circuits. [Markdown](https://eloragrid.ai/library/entries/busbar.md)
- [Normally open contact (NO)](https://eloragrid.ai/symbols/normally-open-contact): A contact shown open in the normal state defined for its device. [Markdown](https://eloragrid.ai/library/entries/normally-open-contact.md)
- [Normally closed contact (NC)](https://eloragrid.ai/symbols/normally-closed-contact): A contact shown closed in the normal state defined for its device. [Markdown](https://eloragrid.ai/library/entries/normally-closed-contact.md)
- [Changeover contact (CO)](https://eloragrid.ai/symbols/changeover-contact): A contact arrangement switching a common connection between two contact paths. [Markdown](https://eloragrid.ai/library/entries/changeover-contact.md)
- [Relay coil (Coil)](https://eloragrid.ai/symbols/relay-coil): The operating element associated with a relay and its separately drawn contacts. [Markdown](https://eloragrid.ai/library/entries/relay-coil.md)
- [Contactor (KM)](https://eloragrid.ai/symbols/contactor): An electrically operated switching device commonly used for repeated switching duties. [Markdown](https://eloragrid.ai/library/entries/contactor.md)
- [Normally open pushbutton (PB NO)](https://eloragrid.ai/symbols/pushbutton-no): A pushbutton contact normally shown open before actuation. [Markdown](https://eloragrid.ai/library/entries/pushbutton-no.md)
- [Normally closed pushbutton (PB NC)](https://eloragrid.ai/symbols/pushbutton-nc): A pushbutton contact normally shown closed before actuation. [Markdown](https://eloragrid.ai/library/entries/pushbutton-nc.md)
- [Emergency-stop operator (E-stop)](https://eloragrid.ai/symbols/emergency-stop): An identified emergency-stop operator and its documented contact arrangement. [Markdown](https://eloragrid.ai/library/entries/emergency-stop.md)
- [Selector switch (SS)](https://eloragrid.ai/symbols/selector-switch): An operator switch selecting between documented control positions. [Markdown](https://eloragrid.ai/library/entries/selector-switch.md)
- [Indicator lamp (Lamp)](https://eloragrid.ai/symbols/indicator-lamp): A visual indicator associated with a documented control or equipment condition. [Markdown](https://eloragrid.ai/library/entries/indicator-lamp.md)
- [Terminal connection (Terminal)](https://eloragrid.ai/symbols/terminal): An identified electrical connection point linking schematic and wiring information. [Markdown](https://eloragrid.ai/library/entries/terminal.md)
- [CT test terminal (CT test)](https://eloragrid.ai/symbols/ct-test-terminal): A current-transformer terminal arrangement providing documented test and shorting facilities. [Markdown](https://eloragrid.ai/library/entries/ct-test-terminal.md)
- [Power transformer (TX)](https://eloragrid.ai/symbols/power-transformer): Equipment transferring electrical power between winding circuits. [Markdown](https://eloragrid.ai/library/entries/power-transformer.md)
- [Generator (GEN)](https://eloragrid.ai/symbols/generator): An electrical generating source represented in a power-system drawing. [Markdown](https://eloragrid.ai/library/entries/generator.md)
- [Three-phase motor (M)](https://eloragrid.ai/symbols/motor): An electrical motor load connected to its switching and protective equipment. [Markdown](https://eloragrid.ai/library/entries/motor.md)
- [PLC input / output (PLC I/O)](https://eloragrid.ai/symbols/plc-io): A controller interface point connecting field signals to an identified module channel. [Markdown](https://eloragrid.ai/library/entries/plc-io.md)
- [Capacitor (C)](https://eloragrid.ai/symbols/capacitor): A capacitive component or bank identified with its circuit function and ratings. [Markdown](https://eloragrid.ai/library/entries/capacitor.md)
- [Resistor (R)](https://eloragrid.ai/symbols/resistor): A resistive component with its value and purpose documented separately. [Markdown](https://eloragrid.ai/library/entries/resistor.md)
- [Protective earth (PE)](https://eloragrid.ai/symbols/protective-earth): An identified connection serving the protective earthing function. [Markdown](https://eloragrid.ai/library/entries/protective-earth.md)
- [Battery (BAT)](https://eloragrid.ai/symbols/battery): An electrochemical electrical source or storage element represented in a circuit. [Markdown](https://eloragrid.ai/library/entries/battery.md)
- [Power converter / inverter (PCS)](https://eloragrid.ai/symbols/power-converter): An identified interface converting electrical power between documented circuit forms. [Markdown](https://eloragrid.ai/library/entries/power-converter.md)
- [Synchronism check (25)](https://eloragrid.ai/protection-functions/25-synchronism-check): Checks documented synchronising conditions before a permitted connection. [Markdown](https://eloragrid.ai/library/entries/25-synchronism-check.md)
- [Undervoltage (27)](https://eloragrid.ai/protection-functions/27-undervoltage): A function responding to voltage below its configured operating criteria. [Markdown](https://eloragrid.ai/library/entries/27-undervoltage.md)
- [Directional power (32)](https://eloragrid.ai/protection-functions/32-directional-power): A function responding to power with a specified direction and operating condition. [Markdown](https://eloragrid.ai/library/entries/32-directional-power.md)
- [Current unbalance / negative sequence (46)](https://eloragrid.ai/protection-functions/46-current-unbalance): A current phase-balance or reverse-phase function used in documented protection applications. [Markdown](https://eloragrid.ai/library/entries/46-current-unbalance.md)
- [Thermal protection (49)](https://eloragrid.ai/protection-functions/49-thermal-protection): A thermal protection function for a documented machine or transformer application. [Markdown](https://eloragrid.ai/library/entries/49-thermal-protection.md)
- [Instantaneous overcurrent (50)](https://eloragrid.ai/protection-functions/50-instantaneous-overcurrent): An overcurrent function without an intentional operating time delay in its instantaneous application. [Markdown](https://eloragrid.ai/library/entries/50-instantaneous-overcurrent.md)
- [Time overcurrent (51)](https://eloragrid.ai/protection-functions/51-time-overcurrent): An overcurrent function with a documented time characteristic. [Markdown](https://eloragrid.ai/library/entries/51-time-overcurrent.md)
- [AC circuit breaker (52)](https://eloragrid.ai/protection-functions/52-ac-circuit-breaker): The device-function number identifying an AC circuit breaker. [Markdown](https://eloragrid.ai/library/entries/52-ac-circuit-breaker.md)
- [Overvoltage (59)](https://eloragrid.ai/protection-functions/59-overvoltage): A function responding to voltage above its configured operating criteria. [Markdown](https://eloragrid.ai/library/entries/59-overvoltage.md)
- [Directional overcurrent (67)](https://eloragrid.ai/protection-functions/67-directional-overcurrent): An overcurrent function with a documented direction criterion. [Markdown](https://eloragrid.ai/library/entries/67-directional-overcurrent.md)
- [AC autoreclosing (79)](https://eloragrid.ai/protection-functions/79-autoreclose): A function coordinating a documented automatic reclosing sequence. [Markdown](https://eloragrid.ai/library/entries/79-autoreclose.md)
- [Frequency protection (81)](https://eloragrid.ai/protection-functions/81-frequency): A function responding to a documented frequency condition. [Markdown](https://eloragrid.ai/library/entries/81-frequency.md)
- [Lockout (86)](https://eloragrid.ai/protection-functions/86-lockout): A lockout function or device with the documented reset and blocking behaviour. [Markdown](https://eloragrid.ai/library/entries/86-lockout.md)
- [Differential protection (87)](https://eloragrid.ai/protection-functions/87-differential): A function comparing documented electrical quantities across a protection zone. [Markdown](https://eloragrid.ai/library/entries/87-differential.md)
- [Line switch (89)](https://eloragrid.ai/protection-functions/89-line-switch): The device-function number used for a line-switching or disconnecting device in its documented application. [Markdown](https://eloragrid.ai/library/entries/89-line-switch.md)
- [Switchgear panel (Panel)](https://eloragrid.ai/objects/switchgear-panel): A generic arrangement object linking switching equipment to its manufacturer drawings. [Markdown](https://eloragrid.ai/library/entries/switchgear-panel.md)
- [Switchboard (Board)](https://eloragrid.ai/objects/switchboard): A distribution assembly represented by a generic envelope in an arrangement drawing. [Markdown](https://eloragrid.ai/library/entries/switchboard.md)
- [Ring main unit (RMU)](https://eloragrid.ai/objects/ring-main-unit): A secondary-distribution switchgear assembly with a selected combination of switching functions. [Markdown](https://eloragrid.ai/library/entries/ring-main-unit.md)
- [Transformer envelope (Transformer GA)](https://eloragrid.ai/objects/transformer-envelope): A generic transformer object for locating the equipment and its documented interfaces. [Markdown](https://eloragrid.ai/library/entries/transformer-envelope.md)
- [Battery storage cabinet (BESS cabinet)](https://eloragrid.ai/objects/battery-cabinet): A generic storage-equipment envelope linked to the selected battery system. [Markdown](https://eloragrid.ai/library/entries/battery-cabinet.md)
- [Power conversion cabinet (PCS cabinet)](https://eloragrid.ai/objects/pcs-cabinet): A generic envelope for the selected power-conversion equipment and its interfaces. [Markdown](https://eloragrid.ai/library/entries/pcs-cabinet.md)
- [Generator package (Genset GA)](https://eloragrid.ai/objects/generator-package): A generic generating-package envelope linked to official equipment and installation drawings. [Markdown](https://eloragrid.ai/library/entries/generator-package.md)
- [Transfer-switch assembly (ATS)](https://eloragrid.ai/objects/transfer-switch): An equipment assembly connecting a load to the selected supply source. [Markdown](https://eloragrid.ai/library/entries/transfer-switch.md)
- [Control / marshalling cabinet (Control GA)](https://eloragrid.ai/objects/control-cabinet): A generic cabinet organising control equipment, terminals and field interfaces. [Markdown](https://eloragrid.ai/library/entries/control-cabinet.md)
- [Cable ladder / tray (Cable support)](https://eloragrid.ai/objects/cable-ladder): A generic route object connecting cable-support layout to the selected system. [Markdown](https://eloragrid.ai/library/entries/cable-ladder.md)
- [Busbar trunking (Busway)](https://eloragrid.ai/objects/busbar-trunking): A physical enclosed distribution system with model-specific sections and fittings. [Markdown](https://eloragrid.ai/library/entries/busbar-trunking.md)
- [Mounting plate (Plate)](https://eloragrid.ai/objects/mounting-plate): An enclosure mounting surface supporting the selected internal components. [Markdown](https://eloragrid.ai/library/entries/mounting-plate.md)
- [Terminal strip assembly (Terminal strip)](https://eloragrid.ai/objects/terminal-strip): A physical assembly of identified terminals and the selected connecting accessories. [Markdown](https://eloragrid.ai/library/entries/terminal-strip.md)
- [Master element (1)](https://eloragrid.ai/protection-functions/1-master-element): Starts or enables the principal operating sequence of a machine or power-system unit. [Markdown](https://eloragrid.ai/library/entries/1-master-element.md)
- [Time-delay starting or closing relay (2)](https://eloragrid.ai/protection-functions/2-time-delay-starting-or-closing-relay): Introduces a deliberate interval before a starting or closing operation is permitted. [Markdown](https://eloragrid.ai/library/entries/2-time-delay-starting-or-closing-relay.md)
- [Checking or interlocking relay (3)](https://eloragrid.ai/protection-functions/3-checking-or-interlocking-relay): Checks a required equipment state before the operating sequence proceeds. [Markdown](https://eloragrid.ai/library/entries/3-checking-or-interlocking-relay.md)
- [Master contactor (4)](https://eloragrid.ai/protection-functions/4-master-contactor): Switches the main control or operating circuit under the unit's master command. [Markdown](https://eloragrid.ai/library/entries/4-master-contactor.md)
- [Stopping device (5)](https://eloragrid.ai/protection-functions/5-stopping-device): Initiates a machine or unit shutdown by removing the relevant operating permission. [Markdown](https://eloragrid.ai/library/entries/5-stopping-device.md)
- [Starting circuit breaker (6)](https://eloragrid.ai/protection-functions/6-starting-circuit-breaker): Connects a machine to the electrical supply used during starting. [Markdown](https://eloragrid.ai/library/entries/6-starting-circuit-breaker.md)
- [Rate-of-change relay (7)](https://eloragrid.ai/protection-functions/7-rate-of-change-relay): Responds to how quickly a monitored quantity changes rather than only its absolute magnitude. [Markdown](https://eloragrid.ai/library/entries/7-rate-of-change-relay.md)
- [Control power disconnecting device (8)](https://eloragrid.ai/protection-functions/8-control-power-disconnecting-device): Isolates the supply feeding a control circuit or control-power bus. [Markdown](https://eloragrid.ai/library/entries/8-control-power-disconnecting-device.md)
- [Reversing device (9)](https://eloragrid.ai/protection-functions/9-reversing-device): Changes the operating connection to reverse the direction of a machine or power circuit. [Markdown](https://eloragrid.ai/library/entries/9-reversing-device.md)
- [Unit sequence switch (10)](https://eloragrid.ai/protection-functions/10-unit-sequence-switch): Selects or determines the order in which multiple units enter an operating sequence. [Markdown](https://eloragrid.ai/library/entries/10-unit-sequence-switch.md)
- [Multifunction device (11)](https://eloragrid.ai/protection-functions/11-multifunction-device): Identifies a device that performs several separately described protection or control functions. [Markdown](https://eloragrid.ai/library/entries/11-multifunction-device.md)
- [Overspeed device (12)](https://eloragrid.ai/protection-functions/12-overspeed-device): Responds when machine speed exceeds the documented operating criterion. [Markdown](https://eloragrid.ai/library/entries/12-overspeed-device.md)
- [Synchronous-speed device (13)](https://eloragrid.ai/protection-functions/13-synchronous-speed-device): Recognises a speed condition associated with synchronism during a machine sequence. [Markdown](https://eloragrid.ai/library/entries/13-synchronous-speed-device.md)
- [Underspeed device (14)](https://eloragrid.ai/protection-functions/14-underspeed-device): Responds to machine speed below the required operating level. [Markdown](https://eloragrid.ai/library/entries/14-underspeed-device.md)
- [Speed or frequency matching device (15)](https://eloragrid.ai/protection-functions/15-speed-or-frequency-matching-device): Adjusts or supervises the difference between two speed or frequency references. [Markdown](https://eloragrid.ai/library/entries/15-speed-or-frequency-matching-device.md)
- [Data communications device (16)](https://eloragrid.ai/protection-functions/16-data-communications-device): Identifies equipment carrying data between control, protection or monitoring devices. [Markdown](https://eloragrid.ai/library/entries/16-data-communications-device.md)
- [Shunting or discharge switch (17)](https://eloragrid.ai/protection-functions/17-shunting-or-discharge-switch): Changes a circuit connection to bypass a component or provide a discharge path. [Markdown](https://eloragrid.ai/library/entries/17-shunting-or-discharge-switch.md)
- [Accelerating or decelerating device (18)](https://eloragrid.ai/protection-functions/18-accelerating-or-decelerating-device): Controls a machine action that changes its operating speed during a sequence. [Markdown](https://eloragrid.ai/library/entries/18-accelerating-or-decelerating-device.md)
- [Starting-to-running transition contactor (19)](https://eloragrid.ai/protection-functions/19-starting-to-running-transition-contactor): Changes the machine connection from its starting arrangement to its running arrangement. [Markdown](https://eloragrid.ai/library/entries/19-starting-to-running-transition-contactor.md)
- [Electrically operated valve (20)](https://eloragrid.ai/protection-functions/20-electrically-operated-valve): Commands a valve through an electrical actuator or solenoid. [Markdown](https://eloragrid.ai/library/entries/20-electrically-operated-valve.md)
- [Distance protection (21)](https://eloragrid.ai/protection-functions/21-distance-protection): Uses measured voltage and current to assess an electrical distance or impedance characteristic. [Markdown](https://eloragrid.ai/library/entries/21-distance-protection.md)
- [Equalizer circuit breaker (22)](https://eloragrid.ai/protection-functions/22-equalizer-circuit-breaker): Switches an equalising connection used in a machine or generator arrangement. [Markdown](https://eloragrid.ai/library/entries/22-equalizer-circuit-breaker.md)
- [Temperature control device (23)](https://eloragrid.ai/protection-functions/23-temperature-control-device): Controls heating, cooling or another process action using a temperature input. [Markdown](https://eloragrid.ai/library/entries/23-temperature-control-device.md)
- [Overexcitation protection (24)](https://eloragrid.ai/protection-functions/24-overexcitation-protection): Supervises the voltage-to-frequency relationship associated with magnetic overexcitation. [Markdown](https://eloragrid.ai/library/entries/24-overexcitation-protection.md)
- [Apparatus thermal device (26)](https://eloragrid.ai/protection-functions/26-apparatus-thermal-device): Responds to the temperature of equipment or a monitored part of that equipment. [Markdown](https://eloragrid.ai/library/entries/26-apparatus-thermal-device.md)
- [Flame detector (28)](https://eloragrid.ai/protection-functions/28-flame-detector): Provides electrical indication that combustion flame is present or absent. [Markdown](https://eloragrid.ai/library/entries/28-flame-detector.md)
- [Isolating contactor (29)](https://eloragrid.ai/protection-functions/29-isolating-contactor): Provides a contactor-operated disconnection within a machine or power circuit. [Markdown](https://eloragrid.ai/library/entries/29-isolating-contactor.md)
- [Annunciator relay (30)](https://eloragrid.ai/protection-functions/30-annunciator-relay): Operates an indication system that presents a detected condition to the operator. [Markdown](https://eloragrid.ai/library/entries/30-annunciator-relay.md)
- [Separate excitation device (31)](https://eloragrid.ai/protection-functions/31-separate-excitation-device): Connects or controls a separately supplied excitation arrangement for a machine. [Markdown](https://eloragrid.ai/library/entries/31-separate-excitation-device.md)
- [Position switch (33)](https://eloragrid.ai/protection-functions/33-position-switch): Changes an electrical indication when a mechanism reaches a defined physical position. [Markdown](https://eloragrid.ai/library/entries/33-position-switch.md)
- [Master sequence device (34)](https://eloragrid.ai/protection-functions/34-master-sequence-device): Coordinates the steps of a machine or switching sequence. [Markdown](https://eloragrid.ai/library/entries/34-master-sequence-device.md)
- [Brush-operating or slip-ring short-circuiting device (35)](https://eloragrid.ai/protection-functions/35-brush-operating-or-slip-ring-short-circuiting-device): Changes the brush or slip-ring arrangement as part of a wound-rotor machine sequence. [Markdown](https://eloragrid.ai/library/entries/35-brush-operating-or-slip-ring-short-circuiting-device.md)
- [Polarity device (36)](https://eloragrid.ai/protection-functions/36-polarity-device): Supervises or establishes a required electrical polarity condition. [Markdown](https://eloragrid.ai/library/entries/36-polarity-device.md)
- [Undercurrent or underpower protection (37)](https://eloragrid.ai/protection-functions/37-undercurrent-or-underpower-protection): Recognises a current or power level below the documented minimum operating criterion. [Markdown](https://eloragrid.ai/library/entries/37-undercurrent-or-underpower-protection.md)
- [Bearing protective device (38)](https://eloragrid.ai/protection-functions/38-bearing-protective-device): Supervises an abnormal condition at a machine bearing, often using temperature or mechanical sensing. [Markdown](https://eloragrid.ai/library/entries/38-bearing-protective-device.md)
- [Mechanical condition monitor (39)](https://eloragrid.ai/protection-functions/39-mechanical-condition-monitor): Converts a monitored mechanical condition into an electrical alarm or protection signal. [Markdown](https://eloragrid.ai/library/entries/39-mechanical-condition-monitor.md)
- [Field or loss-of-excitation protection (40)](https://eloragrid.ai/protection-functions/40-field-or-loss-of-excitation-protection): Detects an abnormal machine excitation condition using the implementation's field or electrical measurements. [Markdown](https://eloragrid.ai/library/entries/40-field-or-loss-of-excitation-protection.md)
- [Field circuit breaker (41)](https://eloragrid.ai/protection-functions/41-field-circuit-breaker): Applies or removes the electrical connection to a machine field circuit. [Markdown](https://eloragrid.ai/library/entries/41-field-circuit-breaker.md)
- [Running circuit breaker (42)](https://eloragrid.ai/protection-functions/42-running-circuit-breaker): Connects a machine to the supply or connection used for normal running. [Markdown](https://eloragrid.ai/library/entries/42-running-circuit-breaker.md)
- [Manual transfer or selector device (43)](https://eloragrid.ai/protection-functions/43-manual-transfer-or-selector-device): Selects an operating circuit, control source or mode through a manual action. [Markdown](https://eloragrid.ai/library/entries/43-manual-transfer-or-selector-device.md)
- [Unit sequence starting relay (44)](https://eloragrid.ai/protection-functions/44-unit-sequence-starting-relay): Starts the next unit or operating step when the documented sequence condition is met. [Markdown](https://eloragrid.ai/library/entries/44-unit-sequence-starting-relay.md)
- [Atmospheric condition monitor (45)](https://eloragrid.ai/protection-functions/45-atmospheric-condition-monitor): Reports an ambient atmospheric condition relevant to equipment operation. [Markdown](https://eloragrid.ai/library/entries/45-atmospheric-condition-monitor.md)
- [Phase-sequence or voltage-balance protection (47)](https://eloragrid.ai/protection-functions/47-phase-sequence-or-voltage-balance-protection): Supervises phase order or voltage imbalance using the selected device's voltage inputs. [Markdown](https://eloragrid.ai/library/entries/47-phase-sequence-or-voltage-balance-protection.md)
- [Incomplete-sequence relay (48)](https://eloragrid.ai/protection-functions/48-incomplete-sequence-relay): Detects that an operating or starting sequence has not completed as required. [Markdown](https://eloragrid.ai/library/entries/48-incomplete-sequence-relay.md)
- [Exciter or DC generator relay (53)](https://eloragrid.ai/protection-functions/53-exciter-or-dc-generator-relay): Supervises an exciter or DC generator condition in a machine control arrangement. [Markdown](https://eloragrid.ai/library/entries/53-exciter-or-dc-generator-relay.md)
- [Turning-gear engaging device (54)](https://eloragrid.ai/protection-functions/54-turning-gear-engaging-device): Controls engagement of the turning gear used to rotate a large machine at low speed. [Markdown](https://eloragrid.ai/library/entries/54-turning-gear-engaging-device.md)
- [Power factor protection (55)](https://eloragrid.ai/protection-functions/55-power-factor-protection): Supervises power factor according to the selected relay's electrical measurement method. [Markdown](https://eloragrid.ai/library/entries/55-power-factor-protection.md)
- [Field application relay (56)](https://eloragrid.ai/protection-functions/56-field-application-relay): Initiates application of excitation at the appropriate step of a machine starting sequence. [Markdown](https://eloragrid.ai/library/entries/56-field-application-relay.md)
- [Short-circuiting or grounding device (57)](https://eloragrid.ai/protection-functions/57-short-circuiting-or-grounding-device): Makes a defined short-circuit or earth connection for the purpose shown in the machine or apparatus scheme. [Markdown](https://eloragrid.ai/library/entries/57-short-circuiting-or-grounding-device.md)
- [Rectification failure relay (58)](https://eloragrid.ai/protection-functions/58-rectification-failure-relay): Detects failure or abnormal operation in a rectifier arrangement. [Markdown](https://eloragrid.ai/library/entries/58-rectification-failure-relay.md)
- [Voltage or current balance relay (60)](https://eloragrid.ai/protection-functions/60-voltage-or-current-balance-relay): Compares related measured circuits or quantities to detect an abnormal imbalance. [Markdown](https://eloragrid.ai/library/entries/60-voltage-or-current-balance-relay.md)
- [Density switch or sensor (61)](https://eloragrid.ai/protection-functions/61-density-switch-or-sensor): Monitors the density of a medium used by electrical equipment. [Markdown](https://eloragrid.ai/library/entries/61-density-switch-or-sensor.md)
- [Time-delay stopping or opening relay (62)](https://eloragrid.ai/protection-functions/62-time-delay-stopping-or-opening-relay): Introduces a documented delay in a stopping or opening operation. [Markdown](https://eloragrid.ai/library/entries/62-time-delay-stopping-or-opening-relay.md)
- [Pressure switch or relay (63)](https://eloragrid.ai/protection-functions/63-pressure-switch-or-relay): Provides an electrical response to a gas, liquid or other pressure condition. [Markdown](https://eloragrid.ai/library/entries/63-pressure-switch-or-relay.md)
- [Ground detector protection (64)](https://eloragrid.ai/protection-functions/64-ground-detector-protection): Identifies an earth or ground fault using the circuit arrangement specified for the device. [Markdown](https://eloragrid.ai/library/entries/64-ground-detector-protection.md)
- [Governor (65)](https://eloragrid.ai/protection-functions/65-governor): Regulates the operating speed or mechanical input of a generating or rotating unit. [Markdown](https://eloragrid.ai/library/entries/65-governor.md)
- [Notching or jogging device (66)](https://eloragrid.ai/protection-functions/66-notching-or-jogging-device): Controls limited machine movements or, in modern motor relays, supervises the allowed starting duty. [Markdown](https://eloragrid.ai/library/entries/66-notching-or-jogging-device.md)
- [Blocking or out-of-step supervision (68)](https://eloragrid.ai/protection-functions/68-blocking-or-out-of-step-supervision): Restrains or coordinates another protection action under the specified system condition. [Markdown](https://eloragrid.ai/library/entries/68-blocking-or-out-of-step-supervision.md)
- [Permissive control device (69)](https://eloragrid.ai/protection-functions/69-permissive-control-device): Permits or prevents an equipment operation according to a selected control condition. [Markdown](https://eloragrid.ai/library/entries/69-permissive-control-device.md)
- [Rheostat (70)](https://eloragrid.ai/protection-functions/70-rheostat): Provides adjustable resistance in a control, excitation or machine circuit. [Markdown](https://eloragrid.ai/library/entries/70-rheostat.md)
- [Level switch or relay (71)](https://eloragrid.ai/protection-functions/71-level-switch-or-relay): Signals a defined level condition in the monitored equipment. [Markdown](https://eloragrid.ai/library/entries/71-level-switch-or-relay.md)
- [DC circuit breaker (72)](https://eloragrid.ai/protection-functions/72-dc-circuit-breaker): Interrupts or switches a direct-current power circuit using a breaker selected for DC duty. [Markdown](https://eloragrid.ai/library/entries/72-dc-circuit-breaker.md)
- [Load-resistor contactor (73)](https://eloragrid.ai/protection-functions/73-load-resistor-contactor): Switches a resistor used to impose, remove or change electrical load in a machine arrangement. [Markdown](https://eloragrid.ai/library/entries/73-load-resistor-contactor.md)
- [Alarm relay (74)](https://eloragrid.ai/protection-functions/74-alarm-relay): Provides an electrical alarm output for a documented monitored condition. [Markdown](https://eloragrid.ai/library/entries/74-alarm-relay.md)
- [Position-changing mechanism (75)](https://eloragrid.ai/protection-functions/75-position-changing-mechanism): Moves an apparatus between defined physical positions. [Markdown](https://eloragrid.ai/library/entries/75-position-changing-mechanism.md)
- [DC overcurrent relay (76)](https://eloragrid.ai/protection-functions/76-dc-overcurrent-relay): Supervises excessive current in a direct-current circuit. [Markdown](https://eloragrid.ai/library/entries/76-dc-overcurrent-relay.md)
- [Telemetering device (77)](https://eloragrid.ai/protection-functions/77-telemetering-device): Transmits a measured quantity from its local measurement point to a remote indication or monitoring system. [Markdown](https://eloragrid.ai/library/entries/77-telemetering-device.md)
- [Phase-angle or out-of-step protection (78)](https://eloragrid.ai/protection-functions/78-phase-angle-or-out-of-step-protection): Supervises the angular relationship or loss of synchronism of an electrical system or machine. [Markdown](https://eloragrid.ai/library/entries/78-phase-angle-or-out-of-step-protection.md)
- [Flow switch or relay (80)](https://eloragrid.ai/protection-functions/80-flow-switch-or-relay): Reports a flow condition in a monitored gas or liquid circuit. [Markdown](https://eloragrid.ai/library/entries/80-flow-switch-or-relay.md)
- [DC load-measuring reclosing relay (82)](https://eloragrid.ai/protection-functions/82-dc-load-measuring-reclosing-relay): Supervises a DC load condition as part of a documented reclosing arrangement. [Markdown](https://eloragrid.ai/library/entries/82-dc-load-measuring-reclosing-relay.md)
- [Automatic selective control or transfer relay (83)](https://eloragrid.ai/protection-functions/83-automatic-selective-control-or-transfer-relay): Automatically selects between control circuits or operating sources under defined conditions. [Markdown](https://eloragrid.ai/library/entries/83-automatic-selective-control-or-transfer-relay.md)
- [Operating mechanism (84)](https://eloragrid.ai/protection-functions/84-operating-mechanism): Provides the motive action that operates electrical apparatus. [Markdown](https://eloragrid.ai/library/entries/84-operating-mechanism.md)
- [Pilot or carrier receiver relay (85)](https://eloragrid.ai/protection-functions/85-pilot-or-carrier-receiver-relay): Receives a communication-assisted protection signal used in a pilot or carrier scheme. [Markdown](https://eloragrid.ai/library/entries/85-pilot-or-carrier-receiver-relay.md)
- [Auxiliary motor or motor-generator (88)](https://eloragrid.ai/protection-functions/88-auxiliary-motor-or-motor-generator): Identifies a motor or motor-generator serving an auxiliary equipment function. [Markdown](https://eloragrid.ai/library/entries/88-auxiliary-motor-or-motor-generator.md)
- [Regulating device (90)](https://eloragrid.ai/protection-functions/90-regulating-device): Adjusts equipment to maintain the controlled electrical or operating quantity. [Markdown](https://eloragrid.ai/library/entries/90-regulating-device.md)
- [Voltage directional relay (91)](https://eloragrid.ai/protection-functions/91-voltage-directional-relay): Uses a voltage relationship with a defined direction criterion in a specialist protection or control scheme. [Markdown](https://eloragrid.ai/library/entries/91-voltage-directional-relay.md)
- [Voltage and power directional relay (92)](https://eloragrid.ai/protection-functions/92-voltage-and-power-directional-relay): Combines voltage and power directional criteria in the specified control or protection arrangement. [Markdown](https://eloragrid.ai/library/entries/92-voltage-and-power-directional-relay.md)
- [Field-changing contactor (93)](https://eloragrid.ai/protection-functions/93-field-changing-contactor): Changes the machine excitation connection or arrangement as part of a controlled field sequence. [Markdown](https://eloragrid.ai/library/entries/93-field-changing-contactor.md)
- [Tripping or trip-free relay (94)](https://eloragrid.ai/protection-functions/94-tripping-or-trip-free-relay): Initiates a tripping action or provides the trip-related logic described in the scheme. [Markdown](https://eloragrid.ai/library/entries/94-tripping-or-trip-free-relay.md)
- [Phase distance protection (21P)](https://eloragrid.ai/protection-functions/21p-phase-distance-protection): Evaluates an impedance characteristic for phase-fault loops on the protected circuit. [Markdown](https://eloragrid.ai/library/entries/21p-phase-distance-protection.md)
- [Ground distance protection (21G)](https://eloragrid.ai/protection-functions/21g-ground-distance-protection): Evaluates a distance characteristic for a phase-to-earth fault loop. [Markdown](https://eloragrid.ai/library/entries/21g-ground-distance-protection.md)
- [Admittance-based earth-fault protection (21YN)](https://eloragrid.ai/protection-functions/21yn-admittance-based-earth-fault-protection): Uses earth-fault voltage and current relationships to assess an admittance-based directional criterion. [Markdown](https://eloragrid.ai/library/entries/21yn-admittance-based-earth-fault-protection.md)
- [Auxiliary-input undervoltage protection (27A)](https://eloragrid.ai/protection-functions/27a-auxiliary-input-undervoltage-protection): Supervises low voltage using the auxiliary voltage input identified by the selected relay. [Markdown](https://eloragrid.ai/library/entries/27a-auxiliary-input-undervoltage-protection.md)
- [Main-input undervoltage protection (27M)](https://eloragrid.ai/protection-functions/27m-main-input-undervoltage-protection): Supervises low voltage using the relay's main voltage measurement inputs. [Markdown](https://eloragrid.ai/library/entries/27m-main-input-undervoltage-protection.md)
- [Reactive-power undervoltage protection (27Q)](https://eloragrid.ai/protection-functions/27q-reactive-power-undervoltage-protection): Combines a reactive-power criterion with undervoltage supervision in the cited interconnection application. [Markdown](https://eloragrid.ai/library/entries/27q-reactive-power-undervoltage-protection.md)
- [Low-voltage ride-through supervision (27T)](https://eloragrid.ai/protection-functions/27t-low-voltage-ride-through-supervision): Supervises a voltage-time ride-through criterion used in a generator or interconnection application. [Markdown](https://eloragrid.ai/library/entries/27t-low-voltage-ride-through-supervision.md)
- [Wattmetric earth-fault protection (32N)](https://eloragrid.ai/protection-functions/32n-wattmetric-earth-fault-protection): Uses residual voltage and current to assess earth-fault power in the documented neutral-system application. [Markdown](https://eloragrid.ai/library/entries/32n-wattmetric-earth-fault-protection.md)
- [Directional reactive-power protection (32V)](https://eloragrid.ai/protection-functions/32v-directional-reactive-power-protection): Supervises forward or reverse reactive power using the selected relay's power-direction convention. [Markdown](https://eloragrid.ai/library/entries/32v-directional-reactive-power-protection.md)
- [Reverse-power protection (32R)](https://eloragrid.ai/protection-functions/32r-reverse-power-protection): Detects active power flowing opposite to the defined generator or circuit direction. [Markdown](https://eloragrid.ai/library/entries/32r-reverse-power-protection.md)
- [Underpower protection (32U)](https://eloragrid.ai/protection-functions/32u-underpower-protection): Supervises active power below the documented operating criterion. [Markdown](https://eloragrid.ai/library/entries/32u-underpower-protection.md)
- [Generator current-unbalance protection (46G)](https://eloragrid.ai/protection-functions/46g-generator-current-unbalance-protection): Supervises generator current imbalance using the manufacturer's machine protection implementation. [Markdown](https://eloragrid.ai/library/entries/46g-generator-current-unbalance-protection.md)
- [Phase-discontinuity protection (46PD)](https://eloragrid.ai/protection-functions/46pd-phase-discontinuity-protection): Uses current-sequence relationships to detect a phase-discontinuity condition. [Markdown](https://eloragrid.ai/library/entries/46pd-phase-discontinuity-protection.md)
- [RTD-based thermal protection (49R)](https://eloragrid.ai/protection-functions/49r-rtd-based-thermal-protection): Uses resistance-temperature-detector measurements for an equipment thermal protection function. [Markdown](https://eloragrid.ai/library/entries/49r-rtd-based-thermal-protection.md)
- [Motor thermal-model protection (49M)](https://eloragrid.ai/protection-functions/49m-motor-thermal-model-protection): Estimates motor thermal duty using the selected relay's motor thermal model. [Markdown](https://eloragrid.ai/library/entries/49m-motor-thermal-model-protection.md)
- [Instantaneous phase overcurrent (50P)](https://eloragrid.ai/protection-functions/50p-instantaneous-phase-overcurrent): Supervises phase-current magnitude for the instantaneous overcurrent element. [Markdown](https://eloragrid.ai/library/entries/50p-instantaneous-phase-overcurrent.md)
- [Instantaneous neutral overcurrent (50N)](https://eloragrid.ai/protection-functions/50n-instantaneous-neutral-overcurrent): Supervises the neutral or residual-current quantity identified by the protection scheme. [Markdown](https://eloragrid.ai/library/entries/50n-instantaneous-neutral-overcurrent.md)
- [Instantaneous ground overcurrent (50G)](https://eloragrid.ai/protection-functions/50g-instantaneous-ground-overcurrent): Supervises the ground-current input or ground-fault quantity identified by the selected relay. [Markdown](https://eloragrid.ai/library/entries/50g-instantaneous-ground-overcurrent.md)
- [Instantaneous negative-sequence overcurrent (50Q)](https://eloragrid.ai/protection-functions/50q-instantaneous-negative-sequence-overcurrent): Supervises negative-sequence current for an instantaneous overcurrent element. [Markdown](https://eloragrid.ai/library/entries/50q-instantaneous-negative-sequence-overcurrent.md)
- [Calculated residual instantaneous overcurrent (50R)](https://eloragrid.ai/protection-functions/50r-calculated-residual-instantaneous-overcurrent): Supervises an instantaneous residual-current element calculated from phase-current measurements in the cited Eaton family. [Markdown](https://eloragrid.ai/library/entries/50r-calculated-residual-instantaneous-overcurrent.md)
- [Measured ground instantaneous overcurrent (50X)](https://eloragrid.ai/protection-functions/50x-measured-ground-instantaneous-overcurrent): Supervises the instantaneous element using a separately measured ground or neutral input in the cited Eaton family. [Markdown](https://eloragrid.ai/library/entries/50x-measured-ground-instantaneous-overcurrent.md)
- [Circuit-breaker failure protection (50BF)](https://eloragrid.ai/protection-functions/50bf-circuit-breaker-failure-protection): Initiates the documented backup action when a breaker does not clear the monitored condition after a trip initiation. [Markdown](https://eloragrid.ai/library/entries/50bf-circuit-breaker-failure-protection.md)
- [Motor jam or stall protection (50J)](https://eloragrid.ai/protection-functions/50j-motor-jam-or-stall-protection): Supervises a motor current condition associated with a jam or stall in the cited relay application. [Markdown](https://eloragrid.ai/library/entries/50j-motor-jam-or-stall-protection.md)
- [Time phase-overcurrent protection (51P)](https://eloragrid.ai/protection-functions/51p-time-phase-overcurrent-protection): Supervises phase overcurrent using the selected time-current characteristic or intentional operating delay. [Markdown](https://eloragrid.ai/library/entries/51p-time-phase-overcurrent-protection.md)
- [Time neutral-overcurrent protection (51N)](https://eloragrid.ai/protection-functions/51n-time-neutral-overcurrent-protection): Supervises neutral or residual overcurrent with the configured timing characteristic. [Markdown](https://eloragrid.ai/library/entries/51n-time-neutral-overcurrent-protection.md)
- [Time ground-overcurrent protection (51G)](https://eloragrid.ai/protection-functions/51g-time-ground-overcurrent-protection): Supervises ground-current overcurrent with the timing defined by the selected relay and scheme. [Markdown](https://eloragrid.ai/library/entries/51g-time-ground-overcurrent-protection.md)
- [Time negative-sequence overcurrent (51Q)](https://eloragrid.ai/protection-functions/51q-time-negative-sequence-overcurrent): Supervises negative-sequence current using a time-dependent operating criterion. [Markdown](https://eloragrid.ai/library/entries/51q-time-negative-sequence-overcurrent.md)
- [Calculated residual time-overcurrent (51R)](https://eloragrid.ai/protection-functions/51r-calculated-residual-time-overcurrent): Applies time-overcurrent protection to the calculated residual-current input in the cited Eaton family. [Markdown](https://eloragrid.ai/library/entries/51r-calculated-residual-time-overcurrent.md)
- [Measured ground time-overcurrent (51X)](https://eloragrid.ai/protection-functions/51x-measured-ground-time-overcurrent): Applies time-overcurrent protection to a separately measured ground or neutral input in the cited Eaton family. [Markdown](https://eloragrid.ai/library/entries/51x-measured-ground-time-overcurrent.md)
- [Voltage-dependent overcurrent (51V)](https://eloragrid.ai/protection-functions/51v-voltage-dependent-overcurrent): Changes overcurrent operation according to the measured voltage using the relay's documented voltage-dependent method. [Markdown](https://eloragrid.ai/library/entries/51v-voltage-dependent-overcurrent.md)
- [Apparent power-factor supervision (55A)](https://eloragrid.ai/protection-functions/55a-apparent-power-factor-supervision): Supervises the apparent power-factor quantity defined in the cited relay family. [Markdown](https://eloragrid.ai/library/entries/55a-apparent-power-factor-supervision.md)
- [Displacement power-factor supervision (55D)](https://eloragrid.ai/protection-functions/55d-displacement-power-factor-supervision): Supervises displacement power factor as defined by the relay's fundamental-frequency measurements. [Markdown](https://eloragrid.ai/library/entries/55d-displacement-power-factor-supervision.md)
- [Residual or neutral overvoltage (59N)](https://eloragrid.ai/protection-functions/59n-residual-or-neutral-overvoltage): Supervises a residual or neutral voltage used by the selected earth-fault or neutral-displacement scheme. [Markdown](https://eloragrid.ai/library/entries/59n-residual-or-neutral-overvoltage.md)
- [Negative-sequence overvoltage (59Q)](https://eloragrid.ai/protection-functions/59q-negative-sequence-overvoltage): Supervises the negative-sequence component derived from three-phase voltage measurements. [Markdown](https://eloragrid.ai/library/entries/59q-negative-sequence-overvoltage.md)
- [Auxiliary-input overvoltage (59A)](https://eloragrid.ai/protection-functions/59a-auxiliary-input-overvoltage): Supervises high voltage on the auxiliary measurement input in the cited Eaton family. [Markdown](https://eloragrid.ai/library/entries/59a-auxiliary-input-overvoltage.md)
- [Main-input overvoltage (59M)](https://eloragrid.ai/protection-functions/59m-main-input-overvoltage): Supervises high voltage using the main three-phase inputs in the cited Eaton family. [Markdown](https://eloragrid.ai/library/entries/59m-main-input-overvoltage.md)
- [Field ground-fault protection (64F)](https://eloragrid.ai/protection-functions/64f-field-ground-fault-protection): Detects an earth fault in a machine field circuit using the selected field-ground detection arrangement. [Markdown](https://eloragrid.ai/library/entries/64f-field-ground-fault-protection.md)
- [Stator ground-fault protection (64G)](https://eloragrid.ai/protection-functions/64g-stator-ground-fault-protection): Supervises generator stator earth faults using the selected stator-ground protection method. [Markdown](https://eloragrid.ai/library/entries/64g-stator-ground-fault-protection.md)
- [Directional phase-overcurrent (67P)](https://eloragrid.ai/protection-functions/67p-directional-phase-overcurrent): Combines phase-current overcurrent operation with the scheme's direction criterion. [Markdown](https://eloragrid.ai/library/entries/67p-directional-phase-overcurrent.md)
- [Directional neutral-overcurrent (67N)](https://eloragrid.ai/protection-functions/67n-directional-neutral-overcurrent): Supervises neutral or residual overcurrent with a documented directional criterion. [Markdown](https://eloragrid.ai/library/entries/67n-directional-neutral-overcurrent.md)
- [Directional ground-overcurrent (67G)](https://eloragrid.ai/protection-functions/67g-directional-ground-overcurrent): Supervises a ground-current quantity with direction determined by the selected relay's polarising method. [Markdown](https://eloragrid.ai/library/entries/67g-directional-ground-overcurrent.md)
- [Directional negative-sequence overcurrent (67Q)](https://eloragrid.ai/protection-functions/67q-directional-negative-sequence-overcurrent): Uses negative-sequence quantities to supervise overcurrent operation in a defined direction. [Markdown](https://eloragrid.ai/library/entries/67q-directional-negative-sequence-overcurrent.md)
- [Calculated residual directional overcurrent (67R)](https://eloragrid.ai/protection-functions/67r-calculated-residual-directional-overcurrent): Applies directional overcurrent to calculated residual current in the cited Eaton application. [Markdown](https://eloragrid.ai/library/entries/67r-calculated-residual-directional-overcurrent.md)
- [Measured ground directional overcurrent (67X)](https://eloragrid.ai/protection-functions/67x-measured-ground-directional-overcurrent): Applies directional supervision to the separately measured ground or neutral current element in the cited Eaton family. [Markdown](https://eloragrid.ai/library/entries/67x-measured-ground-directional-overcurrent.md)
- [Multifrequency admittance earth-fault protection (67YN)](https://eloragrid.ai/protection-functions/67yn-multifrequency-admittance-earth-fault-protection): Assesses earth-fault behaviour using the manufacturer's multifrequency admittance-based method. [Markdown](https://eloragrid.ai/library/entries/67yn-multifrequency-admittance-earth-fault-protection.md)
- [Transient or intermittent earth-fault protection (67NIEF)](https://eloragrid.ai/protection-functions/67nief-transient-or-intermittent-earth-fault-protection): Supervises transient or intermittent earth-fault behaviour in the documented feeder application. [Markdown](https://eloragrid.ai/library/entries/67nief-transient-or-intermittent-earth-fault-protection.md)
- [Trip-coil monitoring (74TCM)](https://eloragrid.ai/protection-functions/74tcm-trip-coil-monitoring): Monitors the electrical integrity of a documented breaker trip-coil circuit. [Markdown](https://eloragrid.ai/library/entries/74tcm-trip-coil-monitoring.md)
- [Voltage vector-shift protection (78VS)](https://eloragrid.ai/protection-functions/78vs-voltage-vector-shift-protection): Supervises an abrupt change in the measured voltage phase angle using the selected relay's vector-shift method. [Markdown](https://eloragrid.ai/library/entries/78vs-voltage-vector-shift-protection.md)
- [Underfrequency protection (81U)](https://eloragrid.ai/protection-functions/81u-underfrequency-protection): Supervises frequency below the defined operating criterion. [Markdown](https://eloragrid.ai/library/entries/81u-underfrequency-protection.md)
- [Overfrequency protection (81O)](https://eloragrid.ai/protection-functions/81o-overfrequency-protection): Supervises frequency above the defined operating criterion. [Markdown](https://eloragrid.ai/library/entries/81o-overfrequency-protection.md)
- [Rate-of-change-of-frequency protection (81R)](https://eloragrid.ai/protection-functions/81r-rate-of-change-of-frequency-protection): Supervises the rate at which measured electrical frequency changes. [Markdown](https://eloragrid.ai/library/entries/81r-rate-of-change-of-frequency-protection.md)
- [Transformer differential protection (87T)](https://eloragrid.ai/protection-functions/87t-transformer-differential-protection): Compares currents associated with a transformer protection zone using the selected relay's differential method. [Markdown](https://eloragrid.ai/library/entries/87t-transformer-differential-protection.md)
- [Busbar differential protection (87B)](https://eloragrid.ai/protection-functions/87b-busbar-differential-protection): Compares currents at the boundaries of a busbar protection zone. [Markdown](https://eloragrid.ai/library/entries/87b-busbar-differential-protection.md)
- [Generator differential protection (87G)](https://eloragrid.ai/protection-functions/87g-generator-differential-protection): Compares current measurements bounding the selected generator differential zone. [Markdown](https://eloragrid.ai/library/entries/87g-generator-differential-protection.md)
- [Motor differential protection (87M)](https://eloragrid.ai/protection-functions/87m-motor-differential-protection): Compares current measurements defining a motor differential protection zone. [Markdown](https://eloragrid.ai/library/entries/87m-motor-differential-protection.md)
- [Line current differential protection (87L)](https://eloragrid.ai/protection-functions/87l-line-current-differential-protection): Compares current information from the terminals of a protected line using a communication-assisted differential scheme. [Markdown](https://eloragrid.ai/library/entries/87l-line-current-differential-protection.md)
- [Neutral differential protection (87N)](https://eloragrid.ai/protection-functions/87n-neutral-differential-protection): Identifies a differential scheme involving neutral or residual-current quantities as defined by the equipment documentation. [Markdown](https://eloragrid.ai/library/entries/87n-neutral-differential-protection.md)
- [Negative-sequence differential protection (87Q)](https://eloragrid.ai/protection-functions/87q-negative-sequence-differential-protection): Compares negative-sequence current information across a differential protection zone. [Markdown](https://eloragrid.ai/library/entries/87q-negative-sequence-differential-protection.md)
- [Restrained current differential protection (87R)](https://eloragrid.ai/protection-functions/87r-restrained-current-differential-protection): Uses a differential operating quantity with restraint in the cited transformer-relay application. [Markdown](https://eloragrid.ai/library/entries/87r-restrained-current-differential-protection.md)
- [Unrestrained high-set differential protection (87H)](https://eloragrid.ai/protection-functions/87h-unrestrained-high-set-differential-protection): Provides the documented high-set or unrestrained differential element in the cited relay family. [Markdown](https://eloragrid.ai/library/entries/87h-unrestrained-high-set-differential-protection.md)
- [Restricted ground differential protection (87GD)](https://eloragrid.ai/protection-functions/87gd-restricted-ground-differential-protection): Compares ground-fault-related currents for the restricted zone defined by the cited relay application. [Markdown](https://eloragrid.ai/library/entries/87gd-restricted-ground-differential-protection.md)
- [Single-pole circuit breaker (CB 1P)](https://eloragrid.ai/symbols/single-pole-circuit-breaker): A circuit breaker interrupts one pole of a circuit. [Markdown](https://eloragrid.ai/library/entries/single-pole-circuit-breaker.md)
- [Thermal circuit breaker (CB TH)](https://eloragrid.ai/symbols/thermal-circuit-breaker): A thermal circuit breaker uses a temperature-responsive trip mechanism to detect sustained overload. [Markdown](https://eloragrid.ai/library/entries/thermal-circuit-breaker.md)
- [Thermal-magnetic circuit breaker (CB TM)](https://eloragrid.ai/symbols/thermal-magnetic-circuit-breaker): A thermal-magnetic breaker combines overload response with a magnetic response to high current. [Markdown](https://eloragrid.ai/library/entries/thermal-magnetic-circuit-breaker.md)
- [Current-limiting circuit breaker (CB LIM)](https://eloragrid.ai/symbols/current-limiting-circuit-breaker): A current-limiting breaker reduces the fault-current peak and energy passed to downstream equipment within its documented operating range. [Markdown](https://eloragrid.ai/library/entries/current-limiting-circuit-breaker.md)
- [Residual-current circuit breaker (RCCB)](https://eloragrid.ai/symbols/residual-current-circuit-breaker): An RCCB operates on residual current and has no integral overcurrent protection. [Markdown](https://eloragrid.ai/library/entries/residual-current-circuit-breaker.md)
- [Residual-current breaker with overcurrent protection (RCBO)](https://eloragrid.ai/symbols/residual-current-breaker-with-overcurrent-protection): An RCBO combines residual-current operation with overcurrent protection in one device. [Markdown](https://eloragrid.ai/library/entries/residual-current-breaker-with-overcurrent-protection.md)
- [Circuit breaker with undervoltage release (CB UV)](https://eloragrid.ai/symbols/circuit-breaker-with-undervoltage-release): A breaker undervoltage release changes the breaker operating condition when its control voltage falls below the specified range. [Markdown](https://eloragrid.ai/library/entries/circuit-breaker-with-undervoltage-release.md)
- [Circuit breaker with electronic trip unit (CB ETU)](https://eloragrid.ai/symbols/circuit-breaker-with-electronic-trip-unit): A breaker electronic trip unit measures current and applies configured protection functions. [Markdown](https://eloragrid.ai/library/entries/circuit-breaker-with-electronic-trip-unit.md)
- [Miniature circuit breaker (MCB)](https://eloragrid.ai/symbols/miniature-circuit-breaker): An MCB is a compact low-voltage circuit breaker commonly used for final circuits and auxiliary supplies. [Markdown](https://eloragrid.ai/library/entries/miniature-circuit-breaker.md)
- [Moulded-case circuit breaker (MCCB)](https://eloragrid.ai/symbols/moulded-case-circuit-breaker): An MCCB is a low-voltage circuit breaker built in a moulded insulating case. [Markdown](https://eloragrid.ai/library/entries/moulded-case-circuit-breaker.md)
- [Air circuit breaker (ACB)](https://eloragrid.ai/symbols/air-circuit-breaker): An ACB is a low-voltage circuit breaker using air as its interrupting medium. [Markdown](https://eloragrid.ai/library/entries/air-circuit-breaker.md)
- [Additional circuit-breaker pole (CB POLE)](https://eloragrid.ai/symbols/additional-circuit-breaker-pole): An additional pole is a separately drawn part of a multipole circuit breaker. [Markdown](https://eloragrid.ai/library/entries/additional-circuit-breaker-pole.md)
- [Switch-disconnector (SD)](https://eloragrid.ai/symbols/switch-disconnector): A switch-disconnector combines operational switching with an isolation function. [Markdown](https://eloragrid.ai/library/entries/switch-disconnector.md)
- [Lockable disconnector (DS LOCK)](https://eloragrid.ai/symbols/lockable-disconnector): A lockable disconnector has a mechanism that can retain the isolation position under a specified locking arrangement. [Markdown](https://eloragrid.ai/library/entries/lockable-disconnector.md)
- [Lockable switch-disconnector (SD LOCK)](https://eloragrid.ai/symbols/lockable-switch-disconnector): A lockable switch-disconnector combines an isolation-capable switching device with a documented locking provision. [Markdown](https://eloragrid.ai/library/entries/lockable-switch-disconnector.md)
- [Three-position disconnector (DS 3POS)](https://eloragrid.ai/symbols/three-position-disconnector): A three-position disconnector selects between two paths and an intermediate position. [Markdown](https://eloragrid.ai/library/entries/three-position-disconnector.md)
- [Semiconductor power switch (SSW)](https://eloragrid.ai/symbols/semiconductor-power-switch): A semiconductor power switch controls a power path electronically. [Markdown](https://eloragrid.ai/library/entries/semiconductor-power-switch.md)
- [Unidirectional semiconductor power switch (SSW UNI)](https://eloragrid.ai/symbols/unidirectional-semiconductor-power-switch): A unidirectional semiconductor switch has a specified direction for its power conduction or control behaviour. [Markdown](https://eloragrid.ai/library/entries/unidirectional-semiconductor-power-switch.md)
- [Two-pole power switch (SW 2P)](https://eloragrid.ai/symbols/two-pole-power-switch): A two-pole power switch operates two circuit conductors through a common device. [Markdown](https://eloragrid.ai/library/entries/two-pole-power-switch.md)
- [Disconnector auxiliary NO contact (DS AUX NO)](https://eloragrid.ai/symbols/disconnector-auxiliary-no-contact): A normally-open disconnector auxiliary contact provides a separate indication or permissive circuit associated with the disconnector mechanism. [Markdown](https://eloragrid.ai/library/entries/disconnector-auxiliary-no-contact.md)
- [Disconnector auxiliary NC contact (DS AUX NC)](https://eloragrid.ai/symbols/disconnector-auxiliary-nc-contact): A normally-closed disconnector auxiliary contact is closed in the documented unactuated reference state. [Markdown](https://eloragrid.ai/library/entries/disconnector-auxiliary-nc-contact.md)
- [Fused switch (SW FUSE)](https://eloragrid.ai/symbols/fused-switch): A fused switch combines a switching function with fuse protection. [Markdown](https://eloragrid.ai/library/entries/fused-switch.md)
- [Fuse-switch (FUSE SW)](https://eloragrid.ai/symbols/fuse-switch): A fuse-switch uses a fuse-link or fuse carrier as part of its moving switching contact system. [Markdown](https://eloragrid.ai/library/entries/fuse-switch.md)
- [Additional fused-switch pole (FUSE POLE)](https://eloragrid.ai/symbols/additional-fused-switch-pole): An additional fused-switch pole represents another conductor of a common multipole device. [Markdown](https://eloragrid.ai/library/entries/additional-fused-switch-pole.md)
- [General-purpose full-range fuse (gG)](https://eloragrid.ai/symbols/general-purpose-full-range-fuse): A gG fuse-link provides full-range overcurrent protection for general applications within its documented ratings. [Markdown](https://eloragrid.ai/library/entries/general-purpose-full-range-fuse.md)
- [Motor short-circuit fuse (aM)](https://eloragrid.ai/symbols/motor-short-circuit-fuse): An aM fuse-link is a partial-range fuse used for motor-circuit short-circuit protection. [Markdown](https://eloragrid.ai/library/entries/motor-short-circuit-fuse.md)
- [Motor full-range fuse (gM)](https://eloragrid.ai/symbols/motor-full-range-fuse): A gM fuse-link is a motor-circuit fuse with a characteristic chosen for starting and fault conditions. [Markdown](https://eloragrid.ai/library/entries/motor-full-range-fuse.md)
- [Current transformer with two secondaries (CT 2SEC)](https://eloragrid.ai/symbols/current-transformer-with-two-secondaries): A CT with two secondary windings supplies two documented secondary circuits. [Markdown](https://eloragrid.ai/library/entries/current-transformer-with-two-secondaries.md)
- [Tapped-secondary current transformer (CT TAP)](https://eloragrid.ai/symbols/tapped-secondary-current-transformer): A tapped CT secondary provides alternative documented transformation ratios through different terminal combinations. [Markdown](https://eloragrid.ai/library/entries/tapped-secondary-current-transformer.md)
- [Current transformer with primary conductor indication (CT PRI)](https://eloragrid.ai/symbols/current-transformer-with-primary-conductor-indication): This CT representation explicitly identifies the primary conductor passing through the measurement location. [Markdown](https://eloragrid.ai/library/entries/current-transformer-with-primary-conductor-indication.md)
- [Core-balance current transformer (CBCT)](https://eloragrid.ai/symbols/core-balance-current-transformer): A core-balance CT measures residual current from the net magnetic effect of conductors passing through its window. [Markdown](https://eloragrid.ai/library/entries/core-balance-current-transformer.md)
- [Residual connection of phase CTs (CT RES)](https://eloragrid.ai/symbols/residual-connection-of-phase-cts): A residual CT connection combines secondary currents from phase CTs to obtain a residual-current input. [Markdown](https://eloragrid.ai/library/entries/residual-connection-of-phase-cts.md)
- [Single-phase two-winding transformer (TX 1PH)](https://eloragrid.ai/symbols/single-phase-two-winding-transformer): A single-phase two-winding transformer transfers energy between separate primary and secondary windings. [Markdown](https://eloragrid.ai/library/entries/single-phase-two-winding-transformer.md)
- [Electrostatically screened transformer (TX SCREEN)](https://eloragrid.ai/symbols/electrostatically-screened-transformer): A screened transformer includes a documented screen between windings. [Markdown](https://eloragrid.ai/library/entries/electrostatically-screened-transformer.md)
- [Three-winding transformer (TX 3W)](https://eloragrid.ai/symbols/three-winding-transformer): A three-winding transformer couples three windings through its magnetic system. [Markdown](https://eloragrid.ai/library/entries/three-winding-transformer.md)
- [Adjustable-ratio transformer (TX ADJ)](https://eloragrid.ai/symbols/adjustable-ratio-transformer): An adjustable-ratio transformer includes a documented means of varying its voltage ratio. [Markdown](https://eloragrid.ai/library/entries/adjustable-ratio-transformer.md)
- [Single-phase autotransformer (AT 1PH)](https://eloragrid.ai/symbols/single-phase-autotransformer): A single-phase autotransformer uses a winding portion shared electrically by its input and output circuits. [Markdown](https://eloragrid.ai/library/entries/single-phase-autotransformer.md)
- [Three-phase star autotransformer (AT 3PH Y)](https://eloragrid.ai/symbols/three-phase-star-autotransformer): A three-phase star-connected autotransformer has electrically shared winding portions arranged in a three-phase star connection. [Markdown](https://eloragrid.ai/library/entries/three-phase-star-autotransformer.md)
- [Star-delta transformer (TX Y-D)](https://eloragrid.ai/symbols/star-delta-transformer): A star-delta transformer connects one winding set in star and the other in delta. [Markdown](https://eloragrid.ai/library/entries/star-delta-transformer.md)
- [Delta-star transformer (TX D-Y)](https://eloragrid.ai/symbols/delta-star-transformer): A delta-star transformer provides a delta-connected winding and a star-connected winding. [Markdown](https://eloragrid.ai/library/entries/delta-star-transformer.md)
- [Delta-delta transformer (TX D-D)](https://eloragrid.ai/symbols/delta-delta-transformer): A delta-delta transformer uses delta-connected windings on both sides. [Markdown](https://eloragrid.ai/library/entries/delta-delta-transformer.md)
- [Star-star transformer (TX Y-Y)](https://eloragrid.ai/symbols/star-star-transformer): A star-star transformer has star-connected windings on both sides. [Markdown](https://eloragrid.ai/library/entries/star-star-transformer.md)
- [Star-zigzag transformer (TX Y-Z)](https://eloragrid.ai/symbols/star-zigzag-transformer): A star-zigzag transformer combines a star-connected winding set with a zigzag-connected set. [Markdown](https://eloragrid.ai/library/entries/star-zigzag-transformer.md)
- [Star-star-delta three-winding transformer (TX Y-Y-D)](https://eloragrid.ai/symbols/star-star-delta-three-winding-transformer): A star-star-delta transformer includes two star-connected winding sets and a delta tertiary winding. [Markdown](https://eloragrid.ai/library/entries/star-star-delta-three-winding-transformer.md)
- [Delta winding connection (DELTA)](https://eloragrid.ai/symbols/delta-winding-connection): A delta winding connects three phase windings in a closed loop. [Markdown](https://eloragrid.ai/library/entries/delta-winding-connection.md)
- [Open-delta winding connection (OPEN D)](https://eloragrid.ai/symbols/open-delta-winding-connection): An open-delta arrangement uses an incomplete delta connection for a specified transformer or measurement purpose. [Markdown](https://eloragrid.ai/library/entries/open-delta-winding-connection.md)
- [Star winding connection (STAR Y)](https://eloragrid.ai/symbols/star-winding-connection): A star winding joins one end of each phase winding at a common point. [Markdown](https://eloragrid.ai/library/entries/star-winding-connection.md)
- [Star winding with accessible neutral (Y N)](https://eloragrid.ai/symbols/star-winding-with-accessible-neutral): An accessible-neutral star winding brings the common star point to a documented terminal. [Markdown](https://eloragrid.ai/library/entries/star-winding-with-accessible-neutral.md)
- [Zigzag winding connection (ZIGZAG)](https://eloragrid.ai/symbols/zigzag-winding-connection): A zigzag winding interconnects portions of phase windings in a specified arrangement. [Markdown](https://eloragrid.ai/library/entries/zigzag-winding-connection.md)
- [Mechanically latched relay coil (K LATCH)](https://eloragrid.ai/symbols/mechanically-latched-relay-coil): A mechanically latched relay retains a documented state after the initiating electrical command is removed. [Markdown](https://eloragrid.ai/library/entries/mechanically-latched-relay-coil.md)
- [Relay reset coil (K RESET)](https://eloragrid.ai/symbols/relay-reset-coil): A reset coil releases or changes the retained state of its associated latching relay. [Markdown](https://eloragrid.ai/library/entries/relay-reset-coil.md)
- [Solid-state relay (SSR)](https://eloragrid.ai/symbols/solid-state-relay): A solid-state relay switches an output through semiconductor circuitry in response to a control input. [Markdown](https://eloragrid.ai/library/entries/solid-state-relay.md)
- [Polarised relay coil (K POL)](https://eloragrid.ai/symbols/polarised-relay-coil): A polarised relay has operation or a specified response that depends on the documented electrical polarity. [Markdown](https://eloragrid.ai/library/entries/polarised-relay-coil.md)
- [AC relay coil (K AC)](https://eloragrid.ai/symbols/ac-relay-coil): An AC relay coil is intended for a specified alternating-current control supply. [Markdown](https://eloragrid.ai/library/entries/ac-relay-coil.md)
- [High-speed relay (K FAST)](https://eloragrid.ai/symbols/high-speed-relay): A high-speed relay has a documented operating response intended for duties where relay timing matters. [Markdown](https://eloragrid.ai/library/entries/high-speed-relay.md)
- [Measuring relay (K MEAS)](https://eloragrid.ai/symbols/measuring-relay): A measuring relay responds to a measured electrical quantity and issues an output according to its configuration. [Markdown](https://eloragrid.ai/library/entries/measuring-relay.md)
- [Relay coil with diode suppression (K DIODE)](https://eloragrid.ai/symbols/relay-coil-with-diode-suppression): A relay with diode suppression includes a diode associated with its coil to limit the transient on de-energisation. [Markdown](https://eloragrid.ai/library/entries/relay-coil-with-diode-suppression.md)
- [Relay coil with diode and LED (K D LED)](https://eloragrid.ai/symbols/relay-coil-with-diode-and-led): A relay assembly with diode and LED combines coil transient suppression and a visible energisation indicator. [Markdown](https://eloragrid.ai/library/entries/relay-coil-with-diode-and-led.md)
- [Relay coil with capacitor suppression (K CAP)](https://eloragrid.ai/symbols/relay-coil-with-capacitor-suppression): A relay with a capacitor suppression element includes a documented capacitive network associated with the coil. [Markdown](https://eloragrid.ai/library/entries/relay-coil-with-capacitor-suppression.md)
- [Relay coil with RC suppression (K RC)](https://eloragrid.ai/symbols/relay-coil-with-rc-suppression): A relay RC suppression network uses resistance and capacitance associated with the coil circuit. [Markdown](https://eloragrid.ai/library/entries/relay-coil-with-rc-suppression.md)
- [Counter relay with manual reset (COUNT MAN)](https://eloragrid.ai/symbols/counter-relay-with-manual-reset): A manually reset counter relay records qualifying events and retains a count until the documented reset action. [Markdown](https://eloragrid.ai/library/entries/counter-relay-with-manual-reset.md)
- [Counter relay with electrical reset (COUNT ELEC)](https://eloragrid.ai/symbols/counter-relay-with-electrical-reset): An electrically reset counter relay has a separate reset command or documented electronic reset mechanism. [Markdown](https://eloragrid.ai/library/entries/counter-relay-with-electrical-reset.md)
- [Non-resettable counter relay (COUNT TOTAL)](https://eloragrid.ai/symbols/non-resettable-counter-relay): A non-resettable counter records events without a normal user reset function. [Markdown](https://eloragrid.ai/library/entries/non-resettable-counter-relay.md)
- [On-delay timer relay (TON)](https://eloragrid.ai/symbols/on-delay-timer-relay): An on-delay timer postpones a specified output transition after its timing condition becomes active. [Markdown](https://eloragrid.ai/library/entries/on-delay-timer-relay.md)
- [Off-delay timer relay (TOFF)](https://eloragrid.ai/symbols/off-delay-timer-relay): An off-delay timer holds a specified output condition for a documented period after its initiating condition is removed. [Markdown](https://eloragrid.ai/library/entries/off-delay-timer-relay.md)
- [On-delay normally-open contact (TON NO)](https://eloragrid.ai/symbols/on-delay-normally-open-contact): An on-delay NO contact changes from its unoperated open state only after the associated timing condition has persisted for the documented delay. [Markdown](https://eloragrid.ai/library/entries/on-delay-normally-open-contact.md)
- [On-delay normally-closed contact (TON NC)](https://eloragrid.ai/symbols/on-delay-normally-closed-contact): An on-delay NC contact opens after the associated timing condition has persisted for its documented interval. [Markdown](https://eloragrid.ai/library/entries/on-delay-normally-closed-contact.md)
- [Off-delay normally-open contact (TOFF NO)](https://eloragrid.ai/symbols/off-delay-normally-open-contact): An off-delay NO contact retains the documented operated state for an interval after the timer trigger is removed. [Markdown](https://eloragrid.ai/library/entries/off-delay-normally-open-contact.md)
- [Off-delay normally-closed contact (TOFF NC)](https://eloragrid.ai/symbols/off-delay-normally-closed-contact): An off-delay NC contact returns to its documented normally-closed state after the delay following removal of the timing trigger. [Markdown](https://eloragrid.ai/library/entries/off-delay-normally-closed-contact.md)
- [Maintained normally-open contact (NO HOLD)](https://eloragrid.ai/symbols/maintained-normally-open-contact): A maintained NO contact retains the actuated closed position according to its mechanism or control arrangement. [Markdown](https://eloragrid.ai/library/entries/maintained-normally-open-contact.md)
- [Maintained normally-closed contact (NC HOLD)](https://eloragrid.ai/symbols/maintained-normally-closed-contact): A maintained NC contact retains its actuated position until the documented return action occurs. [Markdown](https://eloragrid.ai/library/entries/maintained-normally-closed-contact.md)
- [Manually unlatched NO contact (NO UNLATCH)](https://eloragrid.ai/symbols/manually-unlatched-no-contact): A manually unlatched NO contact includes a mechanical retaining action released by a documented manual operation. [Markdown](https://eloragrid.ai/library/entries/manually-unlatched-no-contact.md)
- [Manually unlatched NC contact (NC UNLATCH)](https://eloragrid.ai/symbols/manually-unlatched-nc-contact): A manually unlatched NC contact has a mechanical retained state and a documented manual release. [Markdown](https://eloragrid.ai/library/entries/manually-unlatched-nc-contact.md)
- [Early-make normally-open contact (NO EARLY)](https://eloragrid.ai/symbols/early-make-normally-open-contact): An early-make NO contact closes earlier in the mechanism sequence than specified associated contacts. [Markdown](https://eloragrid.ai/library/entries/early-make-normally-open-contact.md)
- [Late-make normally-open contact (NO LATE)](https://eloragrid.ai/symbols/late-make-normally-open-contact): A late-make NO contact closes later in a documented mechanism sequence than associated contacts. [Markdown](https://eloragrid.ai/library/entries/late-make-normally-open-contact.md)
- [Early-break normally-closed contact (NC EARLY)](https://eloragrid.ai/symbols/early-break-normally-closed-contact): An early-break NC contact opens earlier in a documented mechanical sequence than associated contacts. [Markdown](https://eloragrid.ai/library/entries/early-break-normally-closed-contact.md)
- [Late-break normally-closed contact (NC LATE)](https://eloragrid.ai/symbols/late-break-normally-closed-contact): A late-break NC contact opens later in the documented operating sequence than specified associated contacts. [Markdown](https://eloragrid.ai/library/entries/late-break-normally-closed-contact.md)
- [Make-before-break changeover contact (MBB)](https://eloragrid.ai/symbols/make-before-break-changeover-contact): A make-before-break changeover contact establishes the next path before releasing the previous path during its documented transfer. [Markdown](https://eloragrid.ai/library/entries/make-before-break-changeover-contact.md)
- [Motor overload trip NC contact (OL NC)](https://eloragrid.ai/symbols/motor-overload-trip-nc-contact): An overload trip NC contact opens on the documented overload relay operation. [Markdown](https://eloragrid.ai/library/entries/motor-overload-trip-nc-contact.md)
- [Motor overload alarm NO contact (OL NO)](https://eloragrid.ai/symbols/motor-overload-alarm-no-contact): An overload alarm NO contact closes on the documented overload relay operation. [Markdown](https://eloragrid.ai/library/entries/motor-overload-alarm-no-contact.md)
- [Illuminated normally-open pushbutton (PB NO LAMP)](https://eloragrid.ai/symbols/illuminated-normally-open-pushbutton): An illuminated NO pushbutton combines a manual normally-open contact function with an indication lamp. [Markdown](https://eloragrid.ai/library/entries/illuminated-normally-open-pushbutton.md)
- [Illuminated normally-closed pushbutton (PB NC LAMP)](https://eloragrid.ai/symbols/illuminated-normally-closed-pushbutton): An illuminated NC pushbutton combines a normally-closed manual contact with a lamp in the operator assembly. [Markdown](https://eloragrid.ai/library/entries/illuminated-normally-closed-pushbutton.md)
- [Maintained normally-open pushbutton (PB NO HOLD)](https://eloragrid.ai/symbols/maintained-normally-open-pushbutton): A maintained NO pushbutton stays in its actuated condition until the documented return operation. [Markdown](https://eloragrid.ai/library/entries/maintained-normally-open-pushbutton.md)
- [Maintained normally-closed pushbutton (PB NC HOLD)](https://eloragrid.ai/symbols/maintained-normally-closed-pushbutton): A maintained NC pushbutton retains its actuated open state until the documented return action. [Markdown](https://eloragrid.ai/library/entries/maintained-normally-closed-pushbutton.md)
- [Key-operated normally-open switch (KEY NO)](https://eloragrid.ai/symbols/key-operated-normally-open-switch): A key-operated NO switch closes a contact through an authorised key mechanism. [Markdown](https://eloragrid.ai/library/entries/key-operated-normally-open-switch.md)
- [Key-operated normally-closed switch (KEY NC)](https://eloragrid.ai/symbols/key-operated-normally-closed-switch): A key-operated NC switch opens its reference closed contact through the key mechanism. [Markdown](https://eloragrid.ai/library/entries/key-operated-normally-closed-switch.md)
- [Latched key-operated switch (KEY HOLD)](https://eloragrid.ai/symbols/latched-key-operated-switch): A latched key-operated switch retains its commanded position according to the selected mechanism. [Markdown](https://eloragrid.ai/library/entries/latched-key-operated-switch.md)
- [Pull-cord switch (PULL CORD)](https://eloragrid.ai/symbols/pull-cord-switch): A pull-cord switch converts a cord-operated mechanical action into an electrical contact change. [Markdown](https://eloragrid.ai/library/entries/pull-cord-switch.md)
- [Foot-operated switch (FOOT)](https://eloragrid.ai/symbols/foot-operated-switch): A foot-operated switch uses a pedal mechanism to change an electrical contact. [Markdown](https://eloragrid.ai/library/entries/foot-operated-switch.md)
- [Lever-operated switch (LEVER)](https://eloragrid.ai/symbols/lever-operated-switch): A lever-operated switch changes contact state through a manually operated lever. [Markdown](https://eloragrid.ai/library/entries/lever-operated-switch.md)
- [Three-position maintained selector (SEL 3 HOLD)](https://eloragrid.ai/symbols/three-position-maintained-selector): A three-position maintained selector stays at the selected position until manually moved. [Markdown](https://eloragrid.ai/library/entries/three-position-maintained-selector.md)
- [Three-position selector returning from left (SEL 3 LRET)](https://eloragrid.ai/symbols/three-position-selector-returning-from-left): This three-position selector has a documented spring return from its left position. [Markdown](https://eloragrid.ai/library/entries/three-position-selector-returning-from-left.md)
- [Three-position selector returning from right (SEL 3 RRET)](https://eloragrid.ai/symbols/three-position-selector-returning-from-right): This three-position selector returns from its right position according to its mechanism. [Markdown](https://eloragrid.ai/library/entries/three-position-selector-returning-from-right.md)
- [Three-position centre-return selector (SEL 3 CRET)](https://eloragrid.ai/symbols/three-position-centre-return-selector): A centre-return selector returns from both outer positions to its documented central rest position. [Markdown](https://eloragrid.ai/library/entries/three-position-centre-return-selector.md)
- [Three-position key selector (KEY SEL 3)](https://eloragrid.ai/symbols/three-position-key-selector): A three-position key selector combines position selection with a key-operated mechanism. [Markdown](https://eloragrid.ai/library/entries/three-position-key-selector.md)
- [Four-position maintained selector (SEL 4 HOLD)](https://eloragrid.ai/symbols/four-position-maintained-selector): A four-position maintained selector provides four stable operating choices. [Markdown](https://eloragrid.ai/library/entries/four-position-maintained-selector.md)
- [Four-position key selector (KEY SEL 4)](https://eloragrid.ai/symbols/four-position-key-selector): A four-position key selector provides key-controlled selection among four documented positions. [Markdown](https://eloragrid.ai/library/entries/four-position-key-selector.md)
- [Normally-open limit switch (LS NO)](https://eloragrid.ai/symbols/normally-open-limit-switch): A normally-open limit switch closes when the documented mechanical travel or position condition actuates it. [Markdown](https://eloragrid.ai/library/entries/normally-open-limit-switch.md)
- [Normally-closed limit switch (LS NC)](https://eloragrid.ai/symbols/normally-closed-limit-switch): A normally-closed limit switch opens when the documented mechanical position actuates it. [Markdown](https://eloragrid.ai/library/entries/normally-closed-limit-switch.md)
- [Roller-operated limit switch (LS ROLLER)](https://eloragrid.ai/symbols/roller-operated-limit-switch): A roller-operated limit switch transfers equipment motion through a roller actuator to its electrical contacts. [Markdown](https://eloragrid.ai/library/entries/roller-operated-limit-switch.md)
- [Cam-operated limit switch (LS CAM)](https://eloragrid.ai/symbols/cam-operated-limit-switch): A cam-operated limit switch changes its electrical contact state when a defined cam profile reaches the actuator. [Markdown](https://eloragrid.ai/library/entries/cam-operated-limit-switch.md)
- [Pressure switch NO (PS NO)](https://eloragrid.ai/symbols/pressure-switch-no): A pressure-operated NO switch closes when its documented pressure condition actuates the mechanism. [Markdown](https://eloragrid.ai/library/entries/pressure-switch-no.md)
- [Pressure switch NC (PS NC)](https://eloragrid.ai/symbols/pressure-switch-nc): A pressure-operated NC switch opens under its documented actuation condition. [Markdown](https://eloragrid.ai/library/entries/pressure-switch-nc.md)
- [Temperature switch NO (TS NO)](https://eloragrid.ai/symbols/temperature-switch-no): A temperature-operated NO switch changes from open to closed under its specified actuation condition. [Markdown](https://eloragrid.ai/library/entries/temperature-switch-no.md)
- [Temperature switch NC (TS NC)](https://eloragrid.ai/symbols/temperature-switch-nc): A temperature-operated NC switch opens under a documented thermal condition. [Markdown](https://eloragrid.ai/library/entries/temperature-switch-nc.md)
- [Self-operating thermal switch (TS SELF)](https://eloragrid.ai/symbols/self-operating-thermal-switch): A self-operating thermal switch responds directly to its thermal condition rather than through a separate powered relay input. [Markdown](https://eloragrid.ai/library/entries/self-operating-thermal-switch.md)
- [Float level switch NO (LS FLOAT NO)](https://eloragrid.ai/symbols/float-level-switch-no): A float-operated NO level switch changes contact state through a float mechanism at a documented fluid level. [Markdown](https://eloragrid.ai/library/entries/float-level-switch-no.md)
- [Float level switch NC (LS FLOAT NC)](https://eloragrid.ai/symbols/float-level-switch-nc): A float-operated NC level switch opens when its documented level condition actuates the mechanism. [Markdown](https://eloragrid.ai/library/entries/float-level-switch-nc.md)
- [Liquid flow switch (FS LIQ)](https://eloragrid.ai/symbols/liquid-flow-switch): A liquid-flow switch issues a contact state when a documented flow condition actuates it. [Markdown](https://eloragrid.ai/library/entries/liquid-flow-switch.md)
- [Gas flow switch (FS GAS)](https://eloragrid.ai/symbols/gas-flow-switch): A gas-flow switch changes contact state for a specified gas-flow condition. [Markdown](https://eloragrid.ai/library/entries/gas-flow-switch.md)
- [Inductive proximity switch (PROX IND)](https://eloragrid.ai/symbols/inductive-proximity-switch): An inductive proximity switch detects a documented target without a mechanical contact actuator. [Markdown](https://eloragrid.ai/library/entries/inductive-proximity-switch.md)
- [Three-wire inductive proximity switch (PROX IND 3W)](https://eloragrid.ai/symbols/three-wire-inductive-proximity-switch): A three-wire inductive proximity switch uses separate supply, common and output conductors. [Markdown](https://eloragrid.ai/library/entries/three-wire-inductive-proximity-switch.md)
- [Capacitive proximity switch (PROX CAP)](https://eloragrid.ai/symbols/capacitive-proximity-switch): A capacitive proximity switch detects a target through a change in its sensing capacitance. [Markdown](https://eloragrid.ai/library/entries/capacitive-proximity-switch.md)
- [Magnetic proximity switch (PROX MAG)](https://eloragrid.ai/symbols/magnetic-proximity-switch): A magnetic proximity switch detects a documented magnetic target or field condition. [Markdown](https://eloragrid.ai/library/entries/magnetic-proximity-switch.md)
- [Photoelectric emitter-receiver switch (PHOTO)](https://eloragrid.ai/symbols/photoelectric-emitter-receiver-switch): A photoelectric emitter-receiver device uses an optical path to determine a switching output. [Markdown](https://eloragrid.ai/library/entries/photoelectric-emitter-receiver-switch.md)
- [Thermocouple (TC)](https://eloragrid.ai/symbols/thermocouple): A thermocouple produces a temperature-dependent voltage associated with its dissimilar-metal junction system. [Markdown](https://eloragrid.ai/library/entries/thermocouple.md)
- [Resistance temperature detector (RTD)](https://eloragrid.ai/symbols/resistance-temperature-detector): An RTD is a temperature sensor whose resistance changes with temperature. [Markdown](https://eloragrid.ai/library/entries/resistance-temperature-detector.md)
- [Voltmeter (V)](https://eloragrid.ai/symbols/voltmeter): A voltmeter indicates electrical potential difference between its measurement inputs. [Markdown](https://eloragrid.ai/library/entries/voltmeter.md)
- [Ammeter (A)](https://eloragrid.ai/symbols/ammeter): An ammeter indicates current from a direct or instrument-transformed measurement circuit. [Markdown](https://eloragrid.ai/library/entries/ammeter.md)
- [Power-factor meter (PF)](https://eloragrid.ai/symbols/power-factor-meter): A power-factor meter indicates the relationship between real and apparent power according to the instrument's measurement method. [Markdown](https://eloragrid.ai/library/entries/power-factor-meter.md)
- [Phase-angle meter (PHASE)](https://eloragrid.ai/symbols/phase-angle-meter): A phase-angle meter indicates the phase relationship between documented signals. [Markdown](https://eloragrid.ai/library/entries/phase-angle-meter.md)
- [Frequency meter (Hz)](https://eloragrid.ai/symbols/frequency-meter): A frequency meter indicates the frequency of its measured input. [Markdown](https://eloragrid.ai/library/entries/frequency-meter.md)
- [Temperature indicator (TEMP)](https://eloragrid.ai/symbols/temperature-indicator): A temperature indicator displays the temperature derived from its specified sensor or input. [Markdown](https://eloragrid.ai/library/entries/temperature-indicator.md)
- [Tachometer (RPM)](https://eloragrid.ai/symbols/tachometer): A tachometer indicates rotational speed from its documented sensor or electrical input. [Markdown](https://eloragrid.ai/library/entries/tachometer.md)
- [Running-hours meter (HOURS)](https://eloragrid.ai/symbols/running-hours-meter): A running-hours meter accumulates elapsed time while its specified enabling condition is active. [Markdown](https://eloragrid.ai/library/entries/running-hours-meter.md)
- [Ampere-hour meter (Ah)](https://eloragrid.ai/symbols/ampere-hour-meter): An ampere-hour meter integrates current over time for a documented measurement purpose. [Markdown](https://eloragrid.ai/library/entries/ampere-hour-meter.md)
- [Recording wattmeter (W REC)](https://eloragrid.ai/symbols/recording-wattmeter): A recording wattmeter measures active power and records it according to the specified instrument. [Markdown](https://eloragrid.ai/library/entries/recording-wattmeter.md)
- [Reactive-power meter (var)](https://eloragrid.ai/symbols/reactive-power-meter): A reactive-power meter indicates reactive power using the instrument's documented voltage and current inputs. [Markdown](https://eloragrid.ai/library/entries/reactive-power-meter.md)
- [Synchronoscope (SYNC SCOPE)](https://eloragrid.ai/symbols/synchronoscope): A synchronoscope indicates the phase relationship and relative frequency behaviour of two AC sources. [Markdown](https://eloragrid.ai/library/entries/synchronoscope.md)
- [Active-power indicator (kW)](https://eloragrid.ai/symbols/active-power-indicator): An active-power indicator displays real power derived from its specified measurement inputs. [Markdown](https://eloragrid.ai/library/entries/active-power-indicator.md)
- [Differential voltmeter (DELTA V)](https://eloragrid.ai/symbols/differential-voltmeter): A differential voltmeter indicates a difference between documented voltage inputs. [Markdown](https://eloragrid.ai/library/entries/differential-voltmeter.md)
- [Active-energy meter (kWh)](https://eloragrid.ai/symbols/active-energy-meter): An active-energy meter accumulates active power over time. [Markdown](https://eloragrid.ai/library/entries/active-energy-meter.md)
- [Reactive-energy meter (kvarh)](https://eloragrid.ai/symbols/reactive-energy-meter): A reactive-energy meter accumulates reactive power over time according to the specified register convention. [Markdown](https://eloragrid.ai/library/entries/reactive-energy-meter.md)
- [Maximum-current monitoring relay (I HIGH)](https://eloragrid.ai/symbols/maximum-current-monitoring-relay): A maximum-current relay changes its output when the measured current meets a configured high-current condition. [Markdown](https://eloragrid.ai/library/entries/maximum-current-monitoring-relay.md)
- [Minimum-current monitoring relay (I LOW)](https://eloragrid.ai/symbols/minimum-current-monitoring-relay): A minimum-current relay operates according to a configured low-current condition. [Markdown](https://eloragrid.ai/library/entries/minimum-current-monitoring-relay.md)
- [Current window monitoring relay (I WINDOW)](https://eloragrid.ai/symbols/current-window-monitoring-relay): A current-window relay supervises both minimum and maximum current conditions. [Markdown](https://eloragrid.ai/library/entries/current-window-monitoring-relay.md)
- [Differential-current measuring relay (I DIFF)](https://eloragrid.ai/symbols/differential-current-measuring-relay): A differential-current relay responds to the relationship between specified current inputs. [Markdown](https://eloragrid.ai/library/entries/differential-current-measuring-relay.md)
- [Residual-voltage monitoring relay (U RES)](https://eloragrid.ai/symbols/residual-voltage-monitoring-relay): A residual-voltage relay responds to the specified residual-voltage measurement. [Markdown](https://eloragrid.ai/library/entries/residual-voltage-monitoring-relay.md)
- [Loss-of-voltage monitoring relay (U LOSS)](https://eloragrid.ai/symbols/loss-of-voltage-monitoring-relay): A loss-of-voltage relay changes its output for a documented absence-of-voltage condition. [Markdown](https://eloragrid.ai/library/entries/loss-of-voltage-monitoring-relay.md)
- [Phase-loss monitoring relay (PH LOSS)](https://eloragrid.ai/symbols/phase-loss-monitoring-relay): A phase-loss relay supervises the presence of the specified phases in a three-phase system. [Markdown](https://eloragrid.ai/library/entries/phase-loss-monitoring-relay.md)
- [Frequency monitoring relay (f MON)](https://eloragrid.ai/symbols/frequency-monitoring-relay): A frequency relay issues a documented output for a configured frequency condition. [Markdown](https://eloragrid.ai/library/entries/frequency-monitoring-relay.md)
- [Minimum active-power relay (P LOW)](https://eloragrid.ai/symbols/minimum-active-power-relay): A minimum active-power relay operates according to a configured low active-power condition. [Markdown](https://eloragrid.ai/library/entries/minimum-active-power-relay.md)
- [Feed-through terminal block (TB FEED)](https://eloragrid.ai/symbols/feed-through-terminal-block): A feed-through terminal provides an electrical connection between conductors assigned to the same terminal path. [Markdown](https://eloragrid.ai/library/entries/feed-through-terminal-block.md)
- [Disconnect terminal block (TB DISC)](https://eloragrid.ai/symbols/disconnect-terminal-block): A disconnect terminal includes a documented separable path for circuit isolation or testing at the wiring level. [Markdown](https://eloragrid.ai/library/entries/disconnect-terminal-block.md)
- [Knife-disconnect terminal (TB KNIFE)](https://eloragrid.ai/symbols/knife-disconnect-terminal): A knife-disconnect terminal opens its circuit path using a documented pivoting knife element. [Markdown](https://eloragrid.ai/library/entries/knife-disconnect-terminal.md)
- [Fuse terminal block (TB FUSE)](https://eloragrid.ai/symbols/fuse-terminal-block): A fuse terminal integrates a fuse-link into a terminal connection path. [Markdown](https://eloragrid.ai/library/entries/fuse-terminal-block.md)
- [Diode terminal block (TB DIODE)](https://eloragrid.ai/symbols/diode-terminal-block): A diode terminal includes a semiconductor diode in a documented terminal path. [Markdown](https://eloragrid.ai/library/entries/diode-terminal-block.md)
- [Component terminal block (TB COMP)](https://eloragrid.ai/symbols/component-terminal-block): A component terminal incorporates a documented electrical component or component plug in its wiring path. [Markdown](https://eloragrid.ai/library/entries/component-terminal-block.md)
- [Multilevel terminal block (TB LEVEL)](https://eloragrid.ai/symbols/multilevel-terminal-block): A multilevel terminal carries two or more documented connection levels within one terminal body. [Markdown](https://eloragrid.ai/library/entries/multilevel-terminal-block.md)
- [Multi-conductor terminal block (TB MULTI)](https://eloragrid.ai/symbols/multi-conductor-terminal-block): A multi-conductor terminal provides several connection points for its documented electrical path. [Markdown](https://eloragrid.ai/library/entries/multi-conductor-terminal-block.md)
- [Protective-earth terminal block (TB PE)](https://eloragrid.ai/symbols/protective-earth-terminal-block): A PE terminal provides a documented protective-conductor connection, often including a specified connection to the mounting rail. [Markdown](https://eloragrid.ai/library/entries/protective-earth-terminal-block.md)
- [Sensor terminal block (TB SENSOR)](https://eloragrid.ai/symbols/sensor-terminal-block): A sensor terminal organises supply, return and signal connections for a documented sensor wiring arrangement. [Markdown](https://eloragrid.ai/library/entries/sensor-terminal-block.md)
- [Actuator terminal block (TB ACT)](https://eloragrid.ai/symbols/actuator-terminal-block): An actuator terminal organises supply, output and any protective-conductor connections for a documented actuator circuit. [Markdown](https://eloragrid.ai/library/entries/actuator-terminal-block.md)
- [Plug-in terminal block (TB PLUG)](https://eloragrid.ai/symbols/plug-in-terminal-block): A plug-in terminal allows a documented terminal circuit to be disconnected through a removable mating part. [Markdown](https://eloragrid.ai/library/entries/plug-in-terminal-block.md)
- [High-current terminal block (TB POWER)](https://eloragrid.ai/symbols/high-current-terminal-block): A high-current terminal provides a documented connection for large conductors and power circuits. [Markdown](https://eloragrid.ai/library/entries/high-current-terminal-block.md)
- [Terminal jumper bridge (TB BRIDGE)](https://eloragrid.ai/symbols/terminal-jumper-bridge): A terminal bridge intentionally connects specified terminal points to a common potential. [Markdown](https://eloragrid.ai/library/entries/terminal-jumper-bridge.md)
- [Plug and socket connector pair (PLUG SOCKET)](https://eloragrid.ai/symbols/plug-and-socket-connector-pair): A plug/socket pair represents a detachable electrical connection with two mating sides. [Markdown](https://eloragrid.ai/library/entries/plug-and-socket-connector-pair.md)
- [Connector plug half (PLUG)](https://eloragrid.ai/symbols/connector-plug-half): A plug-half representation identifies one side of a detachable connector. [Markdown](https://eloragrid.ai/library/entries/connector-plug-half.md)
- [Connector socket half (SOCKET)](https://eloragrid.ai/symbols/connector-socket-half): A socket-half representation identifies the mating interface for a detachable plug. [Markdown](https://eloragrid.ai/library/entries/connector-socket-half.md)
- [Wire splice (SPLICE)](https://eloragrid.ai/symbols/wire-splice): A wire splice intentionally joins documented conductors without a detachable connector interface. [Markdown](https://eloragrid.ai/library/entries/wire-splice.md)
- [Earth connection (EARTH)](https://eloragrid.ai/symbols/earth-connection): An earth connection identifies a documented circuit connection to earth. [Markdown](https://eloragrid.ai/library/entries/earth-connection.md)
- [Functional earth (FE)](https://eloragrid.ai/symbols/functional-earth): Functional earth serves an operational purpose such as a documented EMC or signal-reference connection. [Markdown](https://eloragrid.ai/library/entries/functional-earth.md)
- [Protective equipotential bonding (BOND PE)](https://eloragrid.ai/symbols/protective-equipotential-bonding): Protective equipotential bonding connects documented conductive parts as part of the protective arrangement. [Markdown](https://eloragrid.ai/library/entries/protective-equipotential-bonding.md)
- [Functional equipotential bonding (BOND FE)](https://eloragrid.ai/symbols/functional-equipotential-bonding): Functional equipotential bonding connects documented points for an operational or signal-related purpose. [Markdown](https://eloragrid.ai/library/entries/functional-equipotential-bonding.md)
- [Surge arrester (SA)](https://eloragrid.ai/symbols/surge-arrester): A surge arrester diverts a documented surge-related current through its protective path. [Markdown](https://eloragrid.ai/library/entries/surge-arrester.md)
- [Gas-discharge protection tube (GDT)](https://eloragrid.ai/symbols/gas-discharge-protection-tube): A gas-discharge tube provides a documented surge-protection path through gas breakdown. [Markdown](https://eloragrid.ai/library/entries/gas-discharge-protection-tube.md)
- [Spark-gap protective element (SPARK GAP)](https://eloragrid.ai/symbols/spark-gap-protective-element): A spark-gap element provides a documented breakdown path across separated electrodes. [Markdown](https://eloragrid.ai/library/entries/spark-gap-protective-element.md)
- [Variable resistor (R VAR)](https://eloragrid.ai/symbols/variable-resistor): A variable resistor provides a documented adjustable resistance in a circuit path. [Markdown](https://eloragrid.ai/library/entries/variable-resistor.md)
- [Potentiometer (POT)](https://eloragrid.ai/symbols/potentiometer): A potentiometer uses a movable contact on a resistive element to provide a documented adjustable divider or resistance. [Markdown](https://eloragrid.ai/library/entries/potentiometer.md)
- [Light-dependent resistor (LDR)](https://eloragrid.ai/symbols/light-dependent-resistor): A light-dependent resistor changes resistance according to illumination. [Markdown](https://eloragrid.ai/library/entries/light-dependent-resistor.md)
- [Heating element (HEATER)](https://eloragrid.ai/symbols/heating-element): A heating element converts electrical energy to heat in a documented circuit. [Markdown](https://eloragrid.ai/library/entries/heating-element.md)
- [RC network (RC)](https://eloragrid.ai/symbols/rc-network): An RC network combines resistance and capacitance in a specified circuit arrangement. [Markdown](https://eloragrid.ai/library/entries/rc-network.md)
- [Varistor (VDR)](https://eloragrid.ai/symbols/varistor): A varistor is a voltage-dependent resistive component used in a documented circuit, often for transient limiting. [Markdown](https://eloragrid.ai/library/entries/varistor.md)
- [Current-measuring shunt (SHUNT)](https://eloragrid.ai/symbols/current-measuring-shunt): A current-measuring shunt produces a documented voltage drop corresponding to current through a resistive element. [Markdown](https://eloragrid.ai/library/entries/current-measuring-shunt.md)
- [Electrolytic capacitor (C ELEC)](https://eloragrid.ai/symbols/electrolytic-capacitor): An electrolytic capacitor has a specified capacitance, voltage rating and any documented polarity requirement. [Markdown](https://eloragrid.ai/library/entries/electrolytic-capacitor.md)
- [Feedthrough capacitor (C FEED)](https://eloragrid.ai/symbols/feedthrough-capacitor): A feedthrough capacitor is arranged with a conductor path and a documented capacitive connection used in filtering. [Markdown](https://eloragrid.ai/library/entries/feedthrough-capacitor.md)
- [Adjustable capacitor (C ADJ)](https://eloragrid.ai/symbols/adjustable-capacitor): An adjustable capacitor provides a documented variable capacitance. [Markdown](https://eloragrid.ai/library/entries/adjustable-capacitor.md)
- [Three-phase power-factor capacitor (CAP 3PH)](https://eloragrid.ai/symbols/three-phase-power-factor-capacitor): A three-phase capacitor assembly provides a documented reactive-power function connected to the power circuit. [Markdown](https://eloragrid.ai/library/entries/three-phase-power-factor-capacitor.md)
- [Reactor (L)](https://eloragrid.ai/symbols/reactor): A reactor is an inductive component used for a documented power-circuit purpose. [Markdown](https://eloragrid.ai/library/entries/reactor.md)
- [Iron-core reactor (L IRON)](https://eloragrid.ai/symbols/iron-core-reactor): An iron-core reactor uses a documented magnetic core to provide its inductive characteristic. [Markdown](https://eloragrid.ai/library/entries/iron-core-reactor.md)
- [Gapped-core inductor (L GAP)](https://eloragrid.ai/symbols/gapped-core-inductor): A gapped-core inductor includes a documented air gap in its magnetic circuit. [Markdown](https://eloragrid.ai/library/entries/gapped-core-inductor.md)
- [Adjustable-core inductor (L ADJ)](https://eloragrid.ai/symbols/adjustable-core-inductor): An adjustable-core inductor varies its documented inductive characteristic through a magnetic adjustment. [Markdown](https://eloragrid.ai/library/entries/adjustable-core-inductor.md)
- [Diode (D)](https://eloragrid.ai/symbols/diode): A diode provides a semiconductor path with documented directional conduction characteristics. [Markdown](https://eloragrid.ai/library/entries/diode.md)
- [Photodiode (PD)](https://eloragrid.ai/symbols/photodiode): A photodiode is a light-sensitive semiconductor device used in a documented sensing circuit. [Markdown](https://eloragrid.ai/library/entries/photodiode.md)
- [Zener diode (ZD)](https://eloragrid.ai/symbols/zener-diode): A Zener diode is a semiconductor component intended for a documented reverse-breakdown operating function. [Markdown](https://eloragrid.ai/library/entries/zener-diode.md)
- [DIAC (DIAC)](https://eloragrid.ai/symbols/diac): A DIAC is a bidirectional triggering semiconductor device used in a documented control circuit. [Markdown](https://eloragrid.ai/library/entries/diac.md)
- [Single-phase bridge rectifier (BR 1PH)](https://eloragrid.ai/symbols/single-phase-bridge-rectifier): A single-phase bridge rectifier converts its specified AC input to a DC output through a bridge arrangement. [Markdown](https://eloragrid.ai/library/entries/single-phase-bridge-rectifier.md)
- [Three-phase bridge rectifier (BR 3PH)](https://eloragrid.ai/symbols/three-phase-bridge-rectifier): A three-phase bridge rectifier converts a documented three-phase AC input into a DC output. [Markdown](https://eloragrid.ai/library/entries/three-phase-bridge-rectifier.md)
- [Silicon-controlled rectifier (SCR)](https://eloragrid.ai/symbols/silicon-controlled-rectifier): An SCR is a thyristor with a gate-controlled triggering function in its documented circuit. [Markdown](https://eloragrid.ai/library/entries/silicon-controlled-rectifier.md)
- [Gate-turn-off thyristor (GTO)](https://eloragrid.ai/symbols/gate-turn-off-thyristor): A gate-turn-off thyristor has a documented gate-controlled turn-off capability. [Markdown](https://eloragrid.ai/library/entries/gate-turn-off-thyristor.md)
- [TRIAC (TRIAC)](https://eloragrid.ai/symbols/triac): A TRIAC is a bidirectional thyristor used for a documented AC switching or control function. [Markdown](https://eloragrid.ai/library/entries/triac.md)
- [Bidirectional breakdown diode (TVS BI)](https://eloragrid.ai/symbols/bidirectional-breakdown-diode): A bidirectional breakdown diode provides a documented voltage-limiting semiconductor path in both polarities. [Markdown](https://eloragrid.ai/library/entries/bidirectional-breakdown-diode.md)
- [Single-phase AC motor (M 1PH AC)](https://eloragrid.ai/symbols/single-phase-ac-motor): A single-phase AC motor represents a load supplied from a documented single-phase source. [Markdown](https://eloragrid.ai/library/entries/single-phase-ac-motor.md)
- [Single-phase motor with fan (M 1PH FAN)](https://eloragrid.ai/symbols/single-phase-motor-with-fan): A single-phase motor with an associated fan identifies the driven function as well as the electrical load. [Markdown](https://eloragrid.ai/library/entries/single-phase-motor-with-fan.md)
- [Three-phase AC motor (M 3PH)](https://eloragrid.ai/symbols/three-phase-ac-motor): A three-phase AC motor is a load supplied from three documented phases. [Markdown](https://eloragrid.ai/library/entries/three-phase-ac-motor.md)
- [Three-phase motor with fan (M 3PH FAN)](https://eloragrid.ai/symbols/three-phase-motor-with-fan): A three-phase motor with fan identifies an electrically driven ventilation or cooling load. [Markdown](https://eloragrid.ai/library/entries/three-phase-motor-with-fan.md)
- [Wound-rotor induction motor (M WR)](https://eloragrid.ai/symbols/wound-rotor-induction-motor): A wound-rotor induction motor includes a rotor winding arrangement with documented external connections. [Markdown](https://eloragrid.ai/library/entries/wound-rotor-induction-motor.md)
- [Three-phase synchronous motor (M 3PH SYNC)](https://eloragrid.ai/symbols/three-phase-synchronous-motor): A synchronous motor operates with a documented synchronous relationship to the electrical supply. [Markdown](https://eloragrid.ai/library/entries/three-phase-synchronous-motor.md)
- [DC motor (M DC)](https://eloragrid.ai/symbols/dc-motor): A DC motor represents a documented DC electrical load whose armature and any field winding arrangements need to be identified. [Markdown](https://eloragrid.ai/library/entries/dc-motor.md)
- [Permanent-magnet DC motor (M DC PM)](https://eloragrid.ai/symbols/permanent-magnet-dc-motor): A permanent-magnet DC motor uses a permanent magnetic field rather than a separately connected field winding. [Markdown](https://eloragrid.ai/library/entries/permanent-magnet-dc-motor.md)
- [Series-excited DC motor (M DC SERIES)](https://eloragrid.ai/symbols/series-excited-dc-motor): A series-excited DC motor connects its documented field winding in series with the armature circuit. [Markdown](https://eloragrid.ai/library/entries/series-excited-dc-motor.md)
- [Separately excited DC motor (M DC SEP)](https://eloragrid.ai/symbols/separately-excited-dc-motor): A separately excited DC motor has a documented field circuit supplied separately from the armature circuit. [Markdown](https://eloragrid.ai/library/entries/separately-excited-dc-motor.md)
- [DC generator (G DC)](https://eloragrid.ai/symbols/dc-generator): A DC generator converts mechanical input into a documented DC electrical output. [Markdown](https://eloragrid.ai/library/entries/dc-generator.md)
- [Compound-excited DC generator (G DC COMP)](https://eloragrid.ai/symbols/compound-excited-dc-generator): A compound-excited DC generator uses documented series and shunt excitation components. [Markdown](https://eloragrid.ai/library/entries/compound-excited-dc-generator.md)
- [Three-phase synchronous generator (G 3PH SYNC)](https://eloragrid.ai/symbols/three-phase-synchronous-generator): A three-phase synchronous generator supplies a documented AC source associated with its mechanical prime mover and excitation system. [Markdown](https://eloragrid.ai/library/entries/three-phase-synchronous-generator.md)
- [Permanent-magnet synchronous generator (G 3PH PM)](https://eloragrid.ai/symbols/permanent-magnet-synchronous-generator): A permanent-magnet synchronous generator provides an AC source using a permanent magnetic excitation system. [Markdown](https://eloragrid.ai/library/entries/permanent-magnet-synchronous-generator.md)
- [AC-to-DC power supply (PSU AC-DC)](https://eloragrid.ai/symbols/ac-to-dc-power-supply): An AC/DC power supply converts a documented AC input to a DC output for control or auxiliary circuits. [Markdown](https://eloragrid.ai/library/entries/ac-to-dc-power-supply.md)
- [DC-to-DC converter (DC-DC)](https://eloragrid.ai/symbols/dc-to-dc-converter): A DC/DC converter changes a documented DC input into another DC output. [Markdown](https://eloragrid.ai/library/entries/dc-to-dc-converter.md)
- [DC-to-AC inverter (INV DC-AC)](https://eloragrid.ai/symbols/dc-to-ac-inverter): A DC/AC inverter converts a documented DC supply into an AC output. [Markdown](https://eloragrid.ai/library/entries/dc-to-ac-inverter.md)
- [DC uninterruptible power supply (UPS DC)](https://eloragrid.ai/symbols/dc-uninterruptible-power-supply): A DC UPS maintains a documented DC load supply during a specified input interruption using an associated energy store. [Markdown](https://eloragrid.ai/library/entries/dc-uninterruptible-power-supply.md)
- [AC uninterruptible power supply (UPS AC)](https://eloragrid.ai/symbols/ac-uninterruptible-power-supply): An AC UPS provides a documented AC load supply through its normal and backup operating arrangements. [Markdown](https://eloragrid.ai/library/entries/ac-uninterruptible-power-supply.md)
- [Capacitor buffer module (BUFFER CAP)](https://eloragrid.ai/symbols/capacitor-buffer-module): A capacitor buffer module stores energy for a documented short supply-interruption duty. [Markdown](https://eloragrid.ai/library/entries/capacitor-buffer-module.md)
- [Redundant power-supply decoupling module (PSU RED)](https://eloragrid.ai/symbols/redundant-power-supply-decoupling-module): A redundancy module decouples documented power-supply inputs before they feed a common load circuit. [Markdown](https://eloragrid.ai/library/entries/redundant-power-supply-decoupling-module.md)
- [Analog current signal isolator (ISO I-I)](https://eloragrid.ai/symbols/analog-current-signal-isolator): A current signal isolator transfers a documented analog current input to an output while providing the specified electrical separation. [Markdown](https://eloragrid.ai/library/entries/analog-current-signal-isolator.md)
- [Temperature measuring transducer (TEMP TX)](https://eloragrid.ai/symbols/temperature-measuring-transducer): A temperature transducer converts a documented temperature-sensor input into an instrument signal. [Markdown](https://eloragrid.ai/library/entries/temperature-measuring-transducer.md)
- [Photovoltaic inverter (PV INV)](https://eloragrid.ai/symbols/photovoltaic-inverter): A photovoltaic inverter converts a documented PV DC input into an AC output and provides the selected PV control functions. [Markdown](https://eloragrid.ai/library/entries/photovoltaic-inverter.md)
- [Single-phase AC source (AC 1PH)](https://eloragrid.ai/symbols/single-phase-ac-source): A single-phase AC source identifies a documented source boundary in a schematic or SLD. [Markdown](https://eloragrid.ai/library/entries/single-phase-ac-source.md)
- [Three-phase AC source (AC 3PH)](https://eloragrid.ai/symbols/three-phase-ac-source): A three-phase AC source identifies a documented three-phase supply boundary. [Markdown](https://eloragrid.ai/library/entries/three-phase-ac-source.md)
- [Photovoltaic generator (PV GEN)](https://eloragrid.ai/symbols/photovoltaic-generator): A photovoltaic generator represents the electrical production of PV cells or modules. [Markdown](https://eloragrid.ai/library/entries/photovoltaic-generator.md)
- [Solar generating station (SOLAR STN)](https://eloragrid.ai/symbols/solar-generating-station): A solar generating station is a system-level representation of a documented solar-generation facility. [Markdown](https://eloragrid.ai/library/entries/solar-generating-station.md)
- [Wind generating station (WIND STN)](https://eloragrid.ai/symbols/wind-generating-station): A wind generating station is a system-level representation of a documented wind-generation facility. [Markdown](https://eloragrid.ai/library/entries/wind-generating-station.md)
- [Substation (SUBSTATION)](https://eloragrid.ai/symbols/substation): A substation representation identifies a documented facility boundary in a network or system diagram. [Markdown](https://eloragrid.ai/library/entries/substation.md)
- [Converter substation (CONV STN)](https://eloragrid.ai/symbols/converter-substation): A converter-substation representation identifies a documented facility where an electrical conversion function forms part of the network connection. [Markdown](https://eloragrid.ai/library/entries/converter-substation.md)
- [Generic electrical load (LOAD)](https://eloragrid.ai/symbols/generic-electrical-load): A generic electrical load identifies a documented consuming circuit or aggregate load on an SLD. [Markdown](https://eloragrid.ai/library/entries/generic-electrical-load.md)
- [Transformer-fed indicator lamp (LAMP TX)](https://eloragrid.ai/symbols/transformer-fed-indicator-lamp): A transformer-fed indicator lamp includes a documented internal voltage-conversion arrangement. [Markdown](https://eloragrid.ai/library/entries/transformer-fed-indicator-lamp.md)
- [Push-to-test indicator lamp (LAMP TEST)](https://eloragrid.ai/symbols/push-to-test-indicator-lamp): A push-to-test indicator lamp allows a documented local test of the lamp circuit. [Markdown](https://eloragrid.ai/library/entries/push-to-test-indicator-lamp.md)
- [LED indicator lamp (LAMP LED)](https://eloragrid.ai/symbols/led-indicator-lamp): An LED indicator assembly provides a documented visual signal using a semiconductor light source. [Markdown](https://eloragrid.ai/library/entries/led-indicator-lamp.md)
- [Flashing indicator lamp (LAMP FLASH)](https://eloragrid.ai/symbols/flashing-indicator-lamp): A flashing indicator lamp provides a documented intermittent visual indication. [Markdown](https://eloragrid.ai/library/entries/flashing-indicator-lamp.md)
- [Flashing beacon (BEACON FLASH)](https://eloragrid.ai/symbols/flashing-beacon): A flashing beacon gives a documented conspicuous visual signal. [Markdown](https://eloragrid.ai/library/entries/flashing-beacon.md)
- [Rotating beacon (BEACON ROT)](https://eloragrid.ai/symbols/rotating-beacon): A rotating beacon provides a documented rotating visual signal through its specified mechanism or assembly. [Markdown](https://eloragrid.ai/library/entries/rotating-beacon.md)
- [PLC digital input (DI)](https://eloragrid.ai/symbols/plc-digital-input): A PLC digital input reads a documented discrete electrical state from field wiring. [Markdown](https://eloragrid.ai/library/entries/plc-digital-input.md)
- [PLC relay output (DO RELAY)](https://eloragrid.ai/symbols/plc-relay-output): A PLC relay output switches a documented contact path through the module's relay interface. [Markdown](https://eloragrid.ai/library/entries/plc-relay-output.md)
- [PLC transistor output (DO TRANS)](https://eloragrid.ai/symbols/plc-transistor-output): A PLC transistor output switches a documented electronic path for a field load. [Markdown](https://eloragrid.ai/library/entries/plc-transistor-output.md)
- [PLC analog input (AI)](https://eloragrid.ai/symbols/plc-analog-input): A PLC analog input measures a documented voltage, current or sensor quantity. [Markdown](https://eloragrid.ai/library/entries/plc-analog-input.md)
- [PLC analog output (AO)](https://eloragrid.ai/symbols/plc-analog-output): A PLC analog output provides a documented variable voltage or current signal to another device. [Markdown](https://eloragrid.ai/library/entries/plc-analog-output.md)
- [PLC temperature input (TI)](https://eloragrid.ai/symbols/plc-temperature-input): A PLC temperature input connects a documented RTD, thermocouple or compatible sensor through the selected module. [Markdown](https://eloragrid.ai/library/entries/plc-temperature-input.md)
- [Air circuit breaker (ACB)](https://eloragrid.ai/objects/ga-air-circuit-breaker): An air circuit breaker interrupts a low-voltage power circuit and occupies a substantial assembly compartment. [Markdown](https://eloragrid.ai/library/entries/ga-air-circuit-breaker.md)
- [Moulded-case circuit breaker (MCCB)](https://eloragrid.ai/objects/ga-moulded-case-circuit-breaker): A moulded-case breaker combines circuit switching and overcurrent protection in an insulated case. [Markdown](https://eloragrid.ai/library/entries/ga-moulded-case-circuit-breaker.md)
- [Miniature circuit breaker (MCB)](https://eloragrid.ai/objects/ga-miniature-circuit-breaker): A miniature breaker is a compact protective device commonly arranged in rows on a rail or distribution-board support. [Markdown](https://eloragrid.ai/library/entries/ga-miniature-circuit-breaker.md)
- [Residual-current circuit breaker (RCCB)](https://eloragrid.ai/objects/ga-residual-current-circuit-breaker): An RCCB detects residual current and opens its associated circuit, with its function specified independently of overcurrent protection. [Markdown](https://eloragrid.ai/library/entries/ga-residual-current-circuit-breaker.md)
- [Residual-current breaker with overcurrent protection (RCBO)](https://eloragrid.ai/objects/ga-residual-current-breaker-with-overcurrent-protection): An RCBO combines residual-current and overcurrent functions in one device. [Markdown](https://eloragrid.ai/library/entries/ga-residual-current-breaker-with-overcurrent-protection.md)
- [DC circuit breaker (GA)](https://eloragrid.ai/objects/ga-dc-circuit-breaker): A DC breaker is selected to interrupt a specified direct-current circuit. [Markdown](https://eloragrid.ai/library/entries/ga-dc-circuit-breaker.md)
- [Motor-protection circuit breaker (MPCB)](https://eloragrid.ai/objects/ga-motor-protection-circuit-breaker): A motor-protection breaker provides switching and specified motor-circuit protective functions. [Markdown](https://eloragrid.ai/library/entries/ga-motor-protection-circuit-breaker.md)
- [Switch disconnector (GA)](https://eloragrid.ai/objects/ga-switch-disconnector): A switch disconnector provides the specified switching and isolation function for a power circuit. [Markdown](https://eloragrid.ai/library/entries/ga-switch-disconnector.md)
- [Fuse-switch disconnector (GA)](https://eloragrid.ai/objects/ga-fuse-switch-disconnector): A fuse-switch assembly combines a switching arrangement with replaceable fuses. [Markdown](https://eloragrid.ai/library/entries/ga-fuse-switch-disconnector.md)
- [Fuse holder (GA)](https://eloragrid.ai/objects/ga-fuse-holder): A fuse holder supports and connects a replaceable fuse selected for the circuit. [Markdown](https://eloragrid.ai/library/entries/ga-fuse-holder.md)
- [Power contactor (GA)](https://eloragrid.ai/objects/ga-power-contactor): A power contactor switches a power circuit through an electrically operated mechanism. [Markdown](https://eloragrid.ai/library/entries/ga-power-contactor.md)
- [Reversing contactor assembly (GA)](https://eloragrid.ai/objects/ga-reversing-contactor-assembly): A reversing assembly uses coordinated switching devices to change a motor connection sequence. [Markdown](https://eloragrid.ai/library/entries/ga-reversing-contactor-assembly.md)
- [Star-delta starter assembly (GA)](https://eloragrid.ai/objects/ga-star-delta-starter-assembly): A star-delta starter arranges switching devices to change a motor winding connection during starting. [Markdown](https://eloragrid.ai/library/entries/ga-star-delta-starter-assembly.md)
- [Thermal overload relay (GA)](https://eloragrid.ai/objects/ga-thermal-overload-relay): A thermal overload relay monitors motor-circuit loading and operates associated control contacts. [Markdown](https://eloragrid.ai/library/entries/ga-thermal-overload-relay.md)
- [Electronic motor overload relay (GA)](https://eloragrid.ai/objects/ga-electronic-motor-overload-relay): An electronic overload device provides the specified motor monitoring and trip functions. [Markdown](https://eloragrid.ai/library/entries/ga-electronic-motor-overload-relay.md)
- [Soft starter (GA)](https://eloragrid.ai/objects/ga-soft-starter): A soft starter controls motor starting through power-electronic switching. [Markdown](https://eloragrid.ai/library/entries/ga-soft-starter.md)
- [Variable-frequency drive (VFD)](https://eloragrid.ai/objects/ga-variable-frequency-drive): A variable-frequency drive supplies a controlled-frequency motor output. [Markdown](https://eloragrid.ai/library/entries/ga-variable-frequency-drive.md)
- [Drive braking resistor (GA)](https://eloragrid.ai/objects/ga-drive-braking-resistor): A braking resistor dissipates energy when specified as part of a drive braking system. [Markdown](https://eloragrid.ai/library/entries/ga-drive-braking-resistor.md)
- [AC line reactor (GA)](https://eloragrid.ai/objects/ga-ac-line-reactor): A line reactor is an inductive device placed in a power circuit for a specified application. [Markdown](https://eloragrid.ai/library/entries/ga-ac-line-reactor.md)
- [Control transformer (GA)](https://eloragrid.ai/objects/ga-control-transformer): A control transformer supplies an auxiliary circuit at the specified voltage. [Markdown](https://eloragrid.ai/library/entries/ga-control-transformer.md)
- [Dry-type transformer enclosure (GA)](https://eloragrid.ai/objects/ga-dry-type-transformer-enclosure): A dry-type transformer assembly requires a physical zone for windings, enclosure and ventilation. [Markdown](https://eloragrid.ai/library/entries/ga-dry-type-transformer-enclosure.md)
- [Oil-filled transformer installation (GA)](https://eloragrid.ai/objects/ga-oil-filled-transformer-installation): An oil-filled transformer installation includes the tank and specified accessories within a site arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-oil-filled-transformer-installation.md)
- [Neutral earthing resistor cabinet (NER)](https://eloragrid.ai/objects/ga-neutral-earthing-resistor-cabinet): A neutral earthing resistor limits neutral-to-earth fault current in the specified system. [Markdown](https://eloragrid.ai/library/entries/ga-neutral-earthing-resistor-cabinet.md)
- [Power-factor-correction capacitor bank (GA)](https://eloragrid.ai/objects/ga-power-factor-correction-capacitor-bank): A capacitor bank supplies reactive power compensation under the specified control scheme. [Markdown](https://eloragrid.ai/library/entries/ga-power-factor-correction-capacitor-bank.md)
- [Active harmonic filter cabinet (GA)](https://eloragrid.ai/objects/ga-active-harmonic-filter-cabinet): An active harmonic filter uses controlled power electronics for its specified compensation functions. [Markdown](https://eloragrid.ai/library/entries/ga-active-harmonic-filter-cabinet.md)
- [Surge protective device assembly (SPD)](https://eloragrid.ai/objects/ga-surge-protective-device-assembly): A surge protective device limits specified transient overvoltages through its connected protection paths. [Markdown](https://eloragrid.ai/library/entries/ga-surge-protective-device-assembly.md)
- [DIN-rail AC/DC power supply (GA)](https://eloragrid.ai/objects/ga-din-rail-ac-dc-power-supply): A DIN-rail power supply converts an input supply into a specified DC auxiliary supply. [Markdown](https://eloragrid.ai/library/entries/ga-din-rail-ac-dc-power-supply.md)
- [DIN-rail DC/DC converter (DC)](https://eloragrid.ai/objects/ga-din-rail-dc-dc-converter): A DC/DC converter changes a DC supply to the specified output arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-din-rail-dc-dc-converter.md)
- [DC redundancy module (GA)](https://eloragrid.ai/objects/ga-dc-redundancy-module): A redundancy module combines specified supply paths for an auxiliary DC system. [Markdown](https://eloragrid.ai/library/entries/ga-dc-redundancy-module.md)
- [DC buffer module (GA)](https://eloragrid.ai/objects/ga-dc-buffer-module): A buffer module supports a DC bus through specified short supply interruptions. [Markdown](https://eloragrid.ai/library/entries/ga-dc-buffer-module.md)
- [DC UPS module (GA)](https://eloragrid.ai/objects/ga-dc-ups-module): A DC UPS module manages continuity of a DC auxiliary supply with its specified energy-storage interface. [Markdown](https://eloragrid.ai/library/entries/ga-dc-ups-module.md)
- [Battery charger (DC)](https://eloragrid.ai/objects/ga-battery-charger): A battery charger maintains a specified battery supply or starting battery system. [Markdown](https://eloragrid.ai/library/entries/ga-battery-charger.md)
- [AC UPS cabinet (GA)](https://eloragrid.ai/objects/ga-ac-ups-cabinet): An AC UPS provides the specified continuity of supply to supported AC loads. [Markdown](https://eloragrid.ai/library/entries/ga-ac-ups-cabinet.md)
- [UPS maintenance bypass panel (GA)](https://eloragrid.ai/objects/ga-ups-maintenance-bypass-panel): A maintenance bypass arrangement provides the documented alternate supply path around a UPS. [Markdown](https://eloragrid.ai/library/entries/ga-ups-maintenance-bypass-panel.md)
- [Station DC battery rack (GA)](https://eloragrid.ai/objects/ga-station-dc-battery-rack): A battery rack supports cells or modules for a stationary auxiliary DC system. [Markdown](https://eloragrid.ai/library/entries/ga-station-dc-battery-rack.md)
- [PLC CPU module (GA)](https://eloragrid.ai/objects/ga-plc-cpu-module): A PLC CPU executes the programmed control logic of an automation system. [Markdown](https://eloragrid.ai/library/entries/ga-plc-cpu-module.md)
- [PLC power module (GA)](https://eloragrid.ai/objects/ga-plc-power-module): A PLC power module supplies the specified controller and expansion system. [Markdown](https://eloragrid.ai/library/entries/ga-plc-power-module.md)
- [Digital input module (GA)](https://eloragrid.ai/objects/ga-digital-input-module): A digital input module brings discrete field states into a controller. [Markdown](https://eloragrid.ai/library/entries/ga-digital-input-module.md)
- [Digital output module (GA)](https://eloragrid.ai/objects/ga-digital-output-module): A digital output module switches or signals discrete outputs under controller command. [Markdown](https://eloragrid.ai/library/entries/ga-digital-output-module.md)
- [Analogue input module (GA)](https://eloragrid.ai/objects/ga-analogue-input-module): An analogue input module receives the specified continuous measurement signals. [Markdown](https://eloragrid.ai/library/entries/ga-analogue-input-module.md)
- [Analogue output module (GA)](https://eloragrid.ai/objects/ga-analogue-output-module): An analogue output module sends the specified continuous command signals. [Markdown](https://eloragrid.ai/library/entries/ga-analogue-output-module.md)
- [Remote I/O station (GA)](https://eloragrid.ai/objects/ga-remote-i-o-station): A remote I/O station places input and output interfaces away from a controller CPU. [Markdown](https://eloragrid.ai/library/entries/ga-remote-i-o-station.md)
- [HMI touchscreen (GA)](https://eloragrid.ai/objects/ga-hmi-touchscreen): An HMI presents operating information and control interfaces to the user. [Markdown](https://eloragrid.ai/library/entries/ga-hmi-touchscreen.md)
- [Industrial panel PC (GA)](https://eloragrid.ai/objects/ga-industrial-panel-pc): An industrial panel computer provides a computing platform within an equipment arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-industrial-panel-pc.md)
- [Industrial Ethernet switch (GA)](https://eloragrid.ai/objects/ga-industrial-ethernet-switch): An industrial Ethernet switch interconnects devices in the specified communication network. [Markdown](https://eloragrid.ai/library/entries/ga-industrial-ethernet-switch.md)
- [Industrial VPN router (GA)](https://eloragrid.ai/objects/ga-industrial-vpn-router): A remote-access router provides the specified network interface between control equipment and other networks. [Markdown](https://eloragrid.ai/library/entries/ga-industrial-vpn-router.md)
- [Fibre-optic patch panel (GA)](https://eloragrid.ai/objects/ga-fibre-optic-patch-panel): A fibre patch panel organises optical terminations and patch connections. [Markdown](https://eloragrid.ai/library/entries/ga-fibre-optic-patch-panel.md)
- [Communication gateway (GA)](https://eloragrid.ai/objects/ga-communication-gateway): A gateway connects the documented communication protocols or network boundaries. [Markdown](https://eloragrid.ai/library/entries/ga-communication-gateway.md)
- [Interface relay module (GA)](https://eloragrid.ai/objects/ga-interface-relay-module): An interface relay separates a controller signal from the specified switched circuit. [Markdown](https://eloragrid.ai/library/entries/ga-interface-relay-module.md)
- [Relay socket (GA)](https://eloragrid.ai/objects/ga-relay-socket): A relay socket supports a plug-in relay and its associated connections. [Markdown](https://eloragrid.ai/library/entries/ga-relay-socket.md)
- [Timer relay (GA)](https://eloragrid.ai/objects/ga-timer-relay): A timer relay changes its outputs according to the selected time function. [Markdown](https://eloragrid.ai/library/entries/ga-timer-relay.md)
- [Safety relay module (GA)](https://eloragrid.ai/objects/ga-safety-relay-module): A safety relay performs specified monitored control functions within a documented safety circuit. [Markdown](https://eloragrid.ai/library/entries/ga-safety-relay-module.md)
- [Signal conditioner (GA)](https://eloragrid.ai/objects/ga-signal-conditioner): A signal conditioner converts or isolates the specified instrumentation signal. [Markdown](https://eloragrid.ai/library/entries/ga-signal-conditioner.md)
- [Terminal marshalling interface (GA)](https://eloragrid.ai/objects/ga-terminal-marshalling-interface): A marshalling interface organises field circuits and controller connections. [Markdown](https://eloragrid.ai/library/entries/ga-terminal-marshalling-interface.md)
- [Feed-through terminal block (GA)](https://eloragrid.ai/objects/ga-feed-through-terminal-block): A feed-through terminal provides a defined wiring connection across a terminal position. [Markdown](https://eloragrid.ai/library/entries/ga-feed-through-terminal-block.md)
- [Protective-earth terminal block (GA)](https://eloragrid.ai/objects/ga-protective-earth-terminal-block): A protective-earth terminal provides the specified connection between conductors and the earthing arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-protective-earth-terminal-block.md)
- [Multi-level terminal block (GA)](https://eloragrid.ai/objects/ga-multi-level-terminal-block): A multi-level terminal groups distinct connections at several levels within one rail position. [Markdown](https://eloragrid.ai/library/entries/ga-multi-level-terminal-block.md)
- [Fuse terminal block (GA)](https://eloragrid.ai/objects/ga-fuse-terminal-block): A fuse terminal combines a terminal position with a selected fuse arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-fuse-terminal-block.md)
- [Disconnect terminal block (GA)](https://eloragrid.ai/objects/ga-disconnect-terminal-block): A disconnect terminal provides a defined separable point in a wiring circuit. [Markdown](https://eloragrid.ai/library/entries/ga-disconnect-terminal-block.md)
- [CT shorting test terminal (GA)](https://eloragrid.ai/objects/ga-ct-shorting-test-terminal): A CT test terminal supports the specified measuring and test connection arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-ct-shorting-test-terminal.md)
- [Distribution terminal block (GA)](https://eloragrid.ai/objects/ga-distribution-terminal-block): A distribution block divides a supplied circuit among specified outgoing connections. [Markdown](https://eloragrid.ai/library/entries/ga-distribution-terminal-block.md)
- [Pluggable terminal connector (GA)](https://eloragrid.ai/objects/ga-pluggable-terminal-connector): A pluggable terminal arrangement separates a wiring connector from its mating interface. [Markdown](https://eloragrid.ai/library/entries/ga-pluggable-terminal-connector.md)
- [Terminal end stop (GA)](https://eloragrid.ai/objects/ga-terminal-end-stop): An end stop retains a specified terminal assembly on its mounting rail. [Markdown](https://eloragrid.ai/library/entries/ga-terminal-end-stop.md)
- [Terminal marker strip (GA)](https://eloragrid.ai/objects/ga-terminal-marker-strip): A marker strip carries identification for the terminal arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-terminal-marker-strip.md)
- [DIN mounting rail (GA)](https://eloragrid.ai/objects/ga-din-mounting-rail): A mounting rail provides a mechanical support system for compatible components. [Markdown](https://eloragrid.ai/library/entries/ga-din-mounting-rail.md)
- [Slotted wiring duct (GA)](https://eloragrid.ai/objects/ga-slotted-wiring-duct): A slotted duct routes internal panel wiring along a controlled path. [Markdown](https://eloragrid.ai/library/entries/ga-slotted-wiring-duct.md)
- [Cable gland (GA)](https://eloragrid.ai/objects/ga-cable-gland): A cable gland secures and, where specified, seals a cable at an enclosure entry. [Markdown](https://eloragrid.ai/library/entries/ga-cable-gland.md)
- [Cable-entry frame (GA)](https://eloragrid.ai/objects/ga-cable-entry-frame): A cable-entry frame organises one or more cables through a documented enclosure opening. [Markdown](https://eloragrid.ai/library/entries/ga-cable-entry-frame.md)
- [Bulkhead connector (GA)](https://eloragrid.ai/objects/ga-bulkhead-connector): A bulkhead connector provides a separable electrical or communication interface at a panel surface. [Markdown](https://eloragrid.ai/library/entries/ga-bulkhead-connector.md)
- [Cable cleat (GA)](https://eloragrid.ai/objects/ga-cable-cleat): A cable cleat restrains specified cables along a support route. [Markdown](https://eloragrid.ai/library/entries/ga-cable-cleat.md)
- [Perforated cable tray (GA)](https://eloragrid.ai/objects/ga-perforated-cable-tray): A cable tray supports routed cables with the specified tray and support arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-perforated-cable-tray.md)
- [Wire-mesh cable basket (GA)](https://eloragrid.ai/objects/ga-wire-mesh-cable-basket): A wire-mesh basket provides a cable support path for the selected installation. [Markdown](https://eloragrid.ai/library/entries/ga-wire-mesh-cable-basket.md)
- [Cable-tray horizontal bend (GA)](https://eloragrid.ai/objects/ga-cable-tray-horizontal-bend): A horizontal bend changes the direction of a cable-support route in plan. [Markdown](https://eloragrid.ai/library/entries/ga-cable-tray-horizontal-bend.md)
- [Cable-tray vertical riser (GA)](https://eloragrid.ai/objects/ga-cable-tray-vertical-riser): A riser fitting changes the level of a cable-support route. [Markdown](https://eloragrid.ai/library/entries/ga-cable-tray-vertical-riser.md)
- [Cable support bracket (GA)](https://eloragrid.ai/objects/ga-cable-support-bracket): A support bracket transfers cable-route loads into a documented structural support. [Markdown](https://eloragrid.ai/library/entries/ga-cable-support-bracket.md)
- [Cable trench (GA)](https://eloragrid.ai/objects/ga-cable-trench): A cable trench provides a below-floor route for the specified cabling installation. [Markdown](https://eloragrid.ai/library/entries/ga-cable-trench.md)
- [Cable pit (GA)](https://eloragrid.ai/objects/ga-cable-pit): A cable pit provides an access or pulling location along an underground route. [Markdown](https://eloragrid.ai/library/entries/ga-cable-pit.md)
- [Cable duct bank (GA)](https://eloragrid.ai/objects/ga-cable-duct-bank): A duct bank groups underground cable conduits in a documented civil arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-cable-duct-bank.md)
- [Earth bar (GA)](https://eloragrid.ai/objects/ga-earth-bar): An earth bar provides a designated earthing connection point for multiple conductors. [Markdown](https://eloragrid.ai/library/entries/ga-earth-bar.md)
- [Neutral bar (GA)](https://eloragrid.ai/objects/ga-neutral-bar): A neutral bar groups specified neutral connections within an assembly. [Markdown](https://eloragrid.ai/library/entries/ga-neutral-bar.md)
- [Flexible busbar connection (GA)](https://eloragrid.ai/objects/ga-flexible-busbar-connection): A flexible busbar connection joins selected conductors or equipment terminals. [Markdown](https://eloragrid.ai/library/entries/ga-flexible-busbar-connection.md)
- [Rigid busbar assembly (GA)](https://eloragrid.ai/objects/ga-rigid-busbar-assembly): A busbar assembly carries power through a defined set of conductors and supports. [Markdown](https://eloragrid.ai/library/entries/ga-rigid-busbar-assembly.md)
- [Busbar support insulator (GA)](https://eloragrid.ai/objects/ga-busbar-support-insulator): A support insulator locates and separates busbar conductors within an assembly. [Markdown](https://eloragrid.ai/library/entries/ga-busbar-support-insulator.md)
- [Busway tap-off unit (GA)](https://eloragrid.ai/objects/ga-busway-tap-off-unit): A tap-off unit connects an outgoing circuit to the selected busbar trunking system. [Markdown](https://eloragrid.ai/library/entries/ga-busway-tap-off-unit.md)
- [LV incomer compartment (GA)](https://eloragrid.ai/objects/ga-lv-incomer-compartment): An incomer compartment contains the incoming switching and connection equipment of an assembly. [Markdown](https://eloragrid.ai/library/entries/ga-lv-incomer-compartment.md)
- [LV feeder compartment (GA)](https://eloragrid.ai/objects/ga-lv-feeder-compartment): A feeder compartment houses the specified outgoing circuit equipment. [Markdown](https://eloragrid.ai/library/entries/ga-lv-feeder-compartment.md)
- [Bus-coupler compartment (GA)](https://eloragrid.ai/objects/ga-bus-coupler-compartment): A bus-coupler compartment contains the specified switching connection between bus sections. [Markdown](https://eloragrid.ai/library/entries/ga-bus-coupler-compartment.md)
- [Cable termination compartment (GA)](https://eloragrid.ai/objects/ga-cable-termination-compartment): A cable compartment contains the documented field-cable termination zone. [Markdown](https://eloragrid.ai/library/entries/ga-cable-termination-compartment.md)
- [Busbar compartment (GA)](https://eloragrid.ai/objects/ga-busbar-compartment): A busbar compartment houses the assembly's main bus conductors and their supports. [Markdown](https://eloragrid.ai/library/entries/ga-busbar-compartment.md)
- [Metering compartment (GA)](https://eloragrid.ai/objects/ga-metering-compartment): A metering compartment groups specified measurement devices and associated wiring. [Markdown](https://eloragrid.ai/library/entries/ga-metering-compartment.md)
- [Motor control centre lineup (GA)](https://eloragrid.ai/objects/ga-motor-control-centre-lineup): A motor control centre groups motor feeder equipment into an assembly. [Markdown](https://eloragrid.ai/library/entries/ga-motor-control-centre-lineup.md)
- [Withdrawable motor feeder unit (GA)](https://eloragrid.ai/objects/ga-withdrawable-motor-feeder-unit): A withdrawable feeder unit packages the specified motor feeder equipment in a removable assembly. [Markdown](https://eloragrid.ai/library/entries/ga-withdrawable-motor-feeder-unit.md)
- [MV vacuum circuit-breaker truck (GA)](https://eloragrid.ai/objects/ga-mv-vacuum-circuit-breaker-truck): A vacuum-breaker truck carries the selected medium-voltage breaker and connection mechanism. [Markdown](https://eloragrid.ai/library/entries/ga-mv-vacuum-circuit-breaker-truck.md)
- [Switchgear arc exhaust plenum (GA)](https://eloragrid.ai/objects/ga-switchgear-arc-exhaust-plenum): An exhaust plenum forms part of a specified switchgear pressure-relief arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-switchgear-arc-exhaust-plenum.md)
- [Protection relay panel (GA)](https://eloragrid.ai/objects/ga-protection-relay-panel): A relay panel houses protection, control, test and terminal equipment for defined circuits. [Markdown](https://eloragrid.ai/library/entries/ga-protection-relay-panel.md)
- [Panel power meter (GA)](https://eloragrid.ai/objects/ga-panel-power-meter): A panel power meter measures the specified electrical quantities through its input interfaces. [Markdown](https://eloragrid.ai/library/entries/ga-panel-power-meter.md)
- [Energy submeter (GA)](https://eloragrid.ai/objects/ga-energy-submeter): An energy submeter measures consumption for a specified circuit or group of loads. [Markdown](https://eloragrid.ai/library/entries/ga-energy-submeter.md)
- [Window current transformer (GA)](https://eloragrid.ai/objects/ga-window-current-transformer): A window CT surrounds a conductor or busbar to provide the specified current measurement. [Markdown](https://eloragrid.ai/library/entries/ga-window-current-transformer.md)
- [Split-core current transformer (GA)](https://eloragrid.ai/objects/ga-split-core-current-transformer): A split-core CT can be assembled around the specified existing conductor. [Markdown](https://eloragrid.ai/library/entries/ga-split-core-current-transformer.md)
- [Voltage transformer assembly (VT)](https://eloragrid.ai/objects/ga-voltage-transformer-assembly): A voltage-transformer assembly provides the specified voltage measurement interface. [Markdown](https://eloragrid.ai/library/entries/ga-voltage-transformer-assembly.md)
- [Wall-mounted junction enclosure (GA)](https://eloragrid.ai/objects/ga-wall-mounted-junction-enclosure): A junction enclosure houses the specified wiring connections at a field location. [Markdown](https://eloragrid.ai/library/entries/ga-wall-mounted-junction-enclosure.md)
- [Floor-standing enclosure (GA)](https://eloragrid.ai/objects/ga-floor-standing-enclosure): A floor-standing enclosure provides a physical housing for an electrical assembly. [Markdown](https://eloragrid.ai/library/entries/ga-floor-standing-enclosure.md)
- [Enclosure plinth (GA)](https://eloragrid.ai/objects/ga-enclosure-plinth): A plinth supports a cabinet and provides the selected base or cable-entry arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-enclosure-plinth.md)
- [Enclosure gland plate (GA)](https://eloragrid.ai/objects/ga-enclosure-gland-plate): A gland plate provides a defined removable surface for cable entries. [Markdown](https://eloragrid.ai/library/entries/ga-enclosure-gland-plate.md)
- [Enclosure door swing envelope (GA)](https://eloragrid.ai/objects/ga-enclosure-door-swing-envelope): A door-swing envelope represents the space occupied by an opening cabinet door. [Markdown](https://eloragrid.ai/library/entries/ga-enclosure-door-swing-envelope.md)
- [Equipment maintenance envelope (GA)](https://eloragrid.ai/objects/ga-equipment-maintenance-envelope): A maintenance envelope represents the selected space needed for servicing an item. [Markdown](https://eloragrid.ai/library/entries/ga-equipment-maintenance-envelope.md)
- [Equipment removal route (GA)](https://eloragrid.ai/objects/ga-equipment-removal-route): A removal route identifies the documented path for replacing major equipment. [Markdown](https://eloragrid.ai/library/entries/ga-equipment-removal-route.md)
- [Switchroom egress path (GA)](https://eloragrid.ai/objects/ga-switchroom-egress-path): An egress path records a planned route through the room to the designated exits. [Markdown](https://eloragrid.ai/library/entries/ga-switchroom-egress-path.md)
- [Enclosure anti-condensation heater (GA)](https://eloragrid.ai/objects/ga-enclosure-anti-condensation-heater): A cabinet heater provides the specified enclosure heating arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-enclosure-anti-condensation-heater.md)
- [Enclosure thermostat (GA)](https://eloragrid.ai/objects/ga-enclosure-thermostat): A thermostat controls the specified heating or cooling circuit according to its setting. [Markdown](https://eloragrid.ai/library/entries/ga-enclosure-thermostat.md)
- [Enclosure hygrostat (GA)](https://eloragrid.ai/objects/ga-enclosure-hygrostat): A hygrostat operates the specified control circuit according to humidity conditions. [Markdown](https://eloragrid.ai/library/entries/ga-enclosure-hygrostat.md)
- [Enclosure filter fan (GA)](https://eloragrid.ai/objects/ga-enclosure-filter-fan): A filter fan moves air through the specified cabinet ventilation arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-enclosure-filter-fan.md)
- [Enclosure air conditioner (GA)](https://eloragrid.ai/objects/ga-enclosure-air-conditioner): An enclosure cooling unit provides the selected cabinet thermal-control function. [Markdown](https://eloragrid.ai/library/entries/ga-enclosure-air-conditioner.md)
- [Enclosure air-to-air heat exchanger (GA)](https://eloragrid.ai/objects/ga-enclosure-air-to-air-heat-exchanger): A heat exchanger transfers heat across the specified cabinet/environment boundary. [Markdown](https://eloragrid.ai/library/entries/ga-enclosure-air-to-air-heat-exchanger.md)
- [Switchroom supply fan (GA)](https://eloragrid.ai/objects/ga-switchroom-supply-fan): A supply fan delivers the selected incoming airflow to a room ventilation system. [Markdown](https://eloragrid.ai/library/entries/ga-switchroom-supply-fan.md)
- [Switchroom exhaust fan (GA)](https://eloragrid.ai/objects/ga-switchroom-exhaust-fan): An exhaust fan removes air along the documented room ventilation route. [Markdown](https://eloragrid.ai/library/entries/ga-switchroom-exhaust-fan.md)
- [Ventilation intake louver (GA)](https://eloragrid.ai/objects/ga-ventilation-intake-louver): An intake louver forms a selected air-entry interface in a wall or enclosure. [Markdown](https://eloragrid.ai/library/entries/ga-ventilation-intake-louver.md)
- [Motorised ventilation damper (GA)](https://eloragrid.ai/objects/ga-motorised-ventilation-damper): An actuated damper controls the selected airflow path. [Markdown](https://eloragrid.ai/library/entries/ga-motorised-ventilation-damper.md)
- [Backdraft damper (GA)](https://eloragrid.ai/objects/ga-backdraft-damper): A backdraft damper controls reverse airflow through the specified opening. [Markdown](https://eloragrid.ai/library/entries/ga-backdraft-damper.md)
- [Fire damper (GA)](https://eloragrid.ai/objects/ga-fire-damper): A fire damper forms part of the documented fire-resistance arrangement at an air passage. [Markdown](https://eloragrid.ai/library/entries/ga-fire-damper.md)
- [Smoke-control damper (GA)](https://eloragrid.ai/objects/ga-smoke-control-damper): A smoke damper controls the specified smoke-related airflow boundary. [Markdown](https://eloragrid.ai/library/entries/ga-smoke-control-damper.md)
- [Generator day tank (GA)](https://eloragrid.ai/objects/ga-generator-day-tank): A day tank provides the selected local fuel supply arrangement for a generator. [Markdown](https://eloragrid.ai/library/entries/ga-generator-day-tank.md)
- [Generator bulk fuel tank (GA)](https://eloragrid.ai/objects/ga-generator-bulk-fuel-tank): A bulk tank stores fuel for the documented generator fuel system. [Markdown](https://eloragrid.ai/library/entries/ga-generator-bulk-fuel-tank.md)
- [Generator fuel transfer pump (GA)](https://eloragrid.ai/objects/ga-generator-fuel-transfer-pump): A transfer pump moves fuel along the documented tank supply arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-generator-fuel-transfer-pump.md)
- [Generator fuel bund (GA)](https://eloragrid.ai/objects/ga-generator-fuel-bund): A bund provides the selected secondary containment boundary around fuel equipment. [Markdown](https://eloragrid.ai/library/entries/ga-generator-fuel-bund.md)
- [Generator exhaust silencer (GA)](https://eloragrid.ai/objects/ga-generator-exhaust-silencer): An exhaust silencer is part of the specified engine exhaust path. [Markdown](https://eloragrid.ai/library/entries/ga-generator-exhaust-silencer.md)
- [Generator exhaust flexible connection (GA)](https://eloragrid.ai/objects/ga-generator-exhaust-flexible-connection): A flexible exhaust connection accommodates the specified engine/exhaust interface. [Markdown](https://eloragrid.ai/library/entries/ga-generator-exhaust-flexible-connection.md)
- [Generator exhaust stack (GA)](https://eloragrid.ai/objects/ga-generator-exhaust-stack): An exhaust stack routes the specified engine exhaust to a documented discharge location. [Markdown](https://eloragrid.ai/library/entries/ga-generator-exhaust-stack.md)
- [Generator radiator discharge duct (GA)](https://eloragrid.ai/objects/ga-generator-radiator-discharge-duct): A radiator discharge duct directs the specified cooling airflow away from the generator. [Markdown](https://eloragrid.ai/library/entries/ga-generator-radiator-discharge-duct.md)
- [Generator remote radiator (GA)](https://eloragrid.ai/objects/ga-generator-remote-radiator): A remote radiator forms part of the selected generator cooling circuit. [Markdown](https://eloragrid.ai/library/entries/ga-generator-remote-radiator.md)
- [Generator vibration isolator (GA)](https://eloragrid.ai/objects/ga-generator-vibration-isolator): A vibration isolator supports the generator through the specified resilient mounting arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-generator-vibration-isolator.md)
- [Generator acoustic canopy (GA)](https://eloragrid.ai/objects/ga-generator-acoustic-canopy): An acoustic canopy surrounds the selected generator with its documented access and ventilation arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-generator-acoustic-canopy.md)
- [Generator coolant heater (GA)](https://eloragrid.ai/objects/ga-generator-coolant-heater): A coolant heater supplies the selected standby engine heating function. [Markdown](https://eloragrid.ai/library/entries/ga-generator-coolant-heater.md)
- [Generator starting battery (GA)](https://eloragrid.ai/objects/ga-generator-starting-battery): A starting battery supplies the documented engine starting circuit. [Markdown](https://eloragrid.ai/library/entries/ga-generator-starting-battery.md)
- [Generator paralleling controller (GA)](https://eloragrid.ai/objects/ga-generator-paralleling-controller): A paralleling controller coordinates specified generator and switching functions. [Markdown](https://eloragrid.ai/library/entries/ga-generator-paralleling-controller.md)
- [PV string combiner box (GA)](https://eloragrid.ai/objects/ga-pv-string-combiner-box): A PV combiner groups specified photovoltaic string connections and associated devices. [Markdown](https://eloragrid.ai/library/entries/ga-pv-string-combiner-box.md)
- [PV inverter cabinet (GA)](https://eloragrid.ai/objects/ga-pv-inverter-cabinet): A PV inverter converts the selected array DC power to its specified AC interface. [Markdown](https://eloragrid.ai/library/entries/ga-pv-inverter-cabinet.md)
- [PV DC isolator enclosure (GA)](https://eloragrid.ai/objects/ga-pv-dc-isolator-enclosure): A PV isolator arrangement provides the specified array-side DC switching interface. [Markdown](https://eloragrid.ai/library/entries/ga-pv-dc-isolator-enclosure.md)
- [MPPT solar charge controller (GA)](https://eloragrid.ai/objects/ga-mppt-solar-charge-controller): An MPPT controller interfaces the selected photovoltaic source with a DC charging arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-mppt-solar-charge-controller.md)
- [Battery inverter-charger (GA)](https://eloragrid.ai/objects/ga-battery-inverter-charger): An inverter-charger interfaces a battery circuit with the specified AC supply/load system. [Markdown](https://eloragrid.ai/library/entries/ga-battery-inverter-charger.md)
- [Battery management system module (BMS)](https://eloragrid.ai/objects/ga-battery-management-system-module): A BMS module performs the selected battery monitoring and control interface functions. [Markdown](https://eloragrid.ai/library/entries/ga-battery-management-system-module.md)
- [Battery DC disconnect assembly (GA)](https://eloragrid.ai/objects/ga-battery-dc-disconnect-assembly): A battery disconnect assembly provides the documented DC isolation or switching arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-battery-dc-disconnect-assembly.md)
- [Battery precharge assembly (DC)](https://eloragrid.ai/objects/ga-battery-precharge-assembly): A precharge arrangement controls the specified initial charging of a downstream DC interface. [Markdown](https://eloragrid.ai/library/entries/ga-battery-precharge-assembly.md)
- [Battery DC bus distribution module (DC)](https://eloragrid.ai/objects/ga-battery-dc-bus-distribution-module): A DC distribution module organises battery-side supply and outgoing circuits. [Markdown](https://eloragrid.ai/library/entries/ga-battery-dc-bus-distribution-module.md)
- [Battery current shunt (DC)](https://eloragrid.ai/objects/ga-battery-current-shunt): A current shunt provides a specified DC current-measurement interface. [Markdown](https://eloragrid.ai/library/entries/ga-battery-current-shunt.md)
- [Energy-management controller (EMS)](https://eloragrid.ai/objects/ga-energy-management-controller): An energy-management controller coordinates the selected monitoring and dispatch interfaces. [Markdown](https://eloragrid.ai/library/entries/ga-energy-management-controller.md)
- [Outdoor energy-storage container (GA)](https://eloragrid.ai/objects/ga-outdoor-energy-storage-container): An energy-storage container houses the selected storage, conversion and support equipment arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-outdoor-energy-storage-container.md)
- [Battery cooling unit (GA)](https://eloragrid.ai/objects/ga-battery-cooling-unit): A battery cooling unit provides the selected thermal-control interface for a storage system. [Markdown](https://eloragrid.ai/library/entries/ga-battery-cooling-unit.md)
- [Battery fire-system interface panel (GA)](https://eloragrid.ai/objects/ga-battery-fire-system-interface-panel): A fire-system interface panel provides the documented connection between storage equipment and the project's fire system. [Markdown](https://eloragrid.ai/library/entries/ga-battery-fire-system-interface-panel.md)
- [Smoke detector installation point (GA)](https://eloragrid.ai/objects/ga-smoke-detector-installation-point): A detector installation point records the selected fire-detection location in a coordinated room drawing. [Markdown](https://eloragrid.ai/library/entries/ga-smoke-detector-installation-point.md)
- [Fire alarm control panel location (GA)](https://eloragrid.ai/objects/ga-fire-alarm-control-panel-location): A fire-alarm panel location coordinates the specified control equipment within the room or building layout. [Markdown](https://eloragrid.ai/library/entries/ga-fire-alarm-control-panel-location.md)
- [Emergency stop station (GA)](https://eloragrid.ai/objects/ga-emergency-stop-station): An emergency stop station houses the specified emergency-control actuator and contacts. [Markdown](https://eloragrid.ai/library/entries/ga-emergency-stop-station.md)
- [Pilot-light station (GA)](https://eloragrid.ai/objects/ga-pilot-light-station): A pilot-light station displays the documented equipment states through its lamps. [Markdown](https://eloragrid.ai/library/entries/ga-pilot-light-station.md)
- [Selector-switch station (GA)](https://eloragrid.ai/objects/ga-selector-switch-station): A selector station provides the selected maintained or returning control positions. [Markdown](https://eloragrid.ai/library/entries/ga-selector-switch-station.md)
- [Trapped-key interlock assembly (GA)](https://eloragrid.ai/objects/ga-trapped-key-interlock-assembly): A trapped-key arrangement coordinates access or switching through the selected mechanical key sequence. [Markdown](https://eloragrid.ai/library/entries/ga-trapped-key-interlock-assembly.md)
- [Door-mounted pushbutton enclosure (GA)](https://eloragrid.ai/objects/ga-door-mounted-pushbutton-enclosure): A local control station houses the specified operator actuators and contacts. [Markdown](https://eloragrid.ai/library/entries/ga-door-mounted-pushbutton-enclosure.md)
- [Panel service outlet (GA)](https://eloragrid.ai/objects/ga-panel-service-outlet): A panel service outlet provides the specified auxiliary socket interface. [Markdown](https://eloragrid.ai/library/entries/ga-panel-service-outlet.md)
- [Panel inspection lighting (GA)](https://eloragrid.ai/objects/ga-panel-inspection-lighting): A cabinet luminaire illuminates the selected internal service area. [Markdown](https://eloragrid.ai/library/entries/ga-panel-inspection-lighting.md)
- [AutomationDirect BRX Series PLC (BRX Series PLC)](https://eloragrid.ai/objects/automationdirect-brx-series-plc): AutomationDirect BRX Series PLC is a plc cpu module product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-brx-series-plc.md)
- [AutomationDirect CLICK PLCs (CLICK PLCs)](https://eloragrid.ai/objects/automationdirect-click-plcs): AutomationDirect CLICK PLCs is a plc cpu module product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-click-plcs.md)
- [AutomationDirect Productivity1000 PAC (Productivity1000 PAC)](https://eloragrid.ai/objects/automationdirect-productivity1000-pac): AutomationDirect Productivity1000 PAC is a plc cpu module product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-productivity1000-pac.md)
- [AutomationDirect Productivity2000 PAC (Productivity2000 PAC)](https://eloragrid.ai/objects/automationdirect-productivity2000-pac): AutomationDirect Productivity2000 PAC is a plc cpu module product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-productivity2000-pac.md)
- [AutomationDirect Productivity3000 PAC (Productivity3000 PAC)](https://eloragrid.ai/objects/automationdirect-productivity3000-pac): AutomationDirect Productivity3000 PAC is a plc cpu module product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-productivity3000-pac.md)
- [AutomationDirect Terminator Field I/O (Terminator Field I/O)](https://eloragrid.ai/objects/automationdirect-terminator-field-i-o): AutomationDirect Terminator Field I/O is a remote i/o station product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-terminator-field-i-o.md)
- [AutomationDirect Protos X Field I/O (Protos X Field I/O)](https://eloragrid.ai/objects/automationdirect-protos-x-field-i-o): AutomationDirect Protos X Field I/O is a remote i/o station product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-protos-x-field-i-o.md)
- [AutomationDirect ZIPLinks (ZIPLinks)](https://eloragrid.ai/objects/automationdirect-ziplinks): AutomationDirect ZIPLinks is a terminal marshalling interface product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-ziplinks.md)
- [AutomationDirect DINnectors (DINnectors)](https://eloragrid.ai/objects/automationdirect-dinnectors): AutomationDirect DINnectors is a feed-through terminal block product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-dinnectors.md)
- [AutomationDirect Konnect-It DIN-rail terminals (Konnect-It DIN-rail terminals)](https://eloragrid.ai/objects/automationdirect-konnect-it-din-rail-terminals): AutomationDirect Konnect-It DIN-rail terminals is a feed-through terminal block product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-konnect-it-din-rail-terminals.md)
- [AutomationDirect C-more Panels (C-more Panels)](https://eloragrid.ai/objects/automationdirect-c-more-panels): AutomationDirect C-more Panels is a hmi touchscreen product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-c-more-panels.md)
- [AutomationDirect C-more Micro Graphic Panels (C-more Micro Graphic Panels)](https://eloragrid.ai/objects/automationdirect-c-more-micro-graphic-panels): AutomationDirect C-more Micro Graphic Panels is a hmi touchscreen product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-c-more-micro-graphic-panels.md)
- [AutomationDirect GS and DURApulse AC drives (GS and DURApulse AC drives)](https://eloragrid.ai/objects/automationdirect-gs-and-durapulse-ac-drives): AutomationDirect GS and DURApulse AC drives is a variable-frequency drive product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-gs-and-durapulse-ac-drives.md)
- [AutomationDirect LR Series line reactors (LR Series line reactors)](https://eloragrid.ai/objects/automationdirect-lr-series-line-reactors): AutomationDirect LR Series line reactors is a ac line reactor product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-lr-series-line-reactors.md)
- [AutomationDirect Bimed cable glands (Bimed cable glands)](https://eloragrid.ai/objects/automationdirect-bimed-cable-glands): AutomationDirect Bimed cable glands is a cable gland product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-bimed-cable-glands.md)
- [AutomationDirect ZIPport Multi-Wire Connectors (ZIPport Multi-Wire Connectors)](https://eloragrid.ai/objects/automationdirect-zipport-multi-wire-connectors): AutomationDirect ZIPport Multi-Wire Connectors is a bulkhead connector product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-zipport-multi-wire-connectors.md)
- [AutomationDirect ZIPport Panel Interface Connectors (ZIPport Panel Interface Connectors)](https://eloragrid.ai/objects/automationdirect-zipport-panel-interface-connectors): AutomationDirect ZIPport Panel Interface Connectors is a bulkhead connector product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-zipport-panel-interface-connectors.md)
- [AutomationDirect Gladiator CFS disconnects (Gladiator CFS disconnects)](https://eloragrid.ai/objects/automationdirect-gladiator-cfs-disconnects): AutomationDirect Gladiator CFS disconnects is a fuse-switch disconnector product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-gladiator-cfs-disconnects.md)
- [AutomationDirect WMZT miniature circuit breakers (WMZT miniature circuit breakers)](https://eloragrid.ai/objects/automationdirect-wmzt-miniature-circuit-breakers): AutomationDirect WMZT miniature circuit breakers is a miniature circuit breaker product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-wmzt-miniature-circuit-breakers.md)
- [AutomationDirect Edison Class T fuses (Edison Class T fuses)](https://eloragrid.ai/objects/automationdirect-edison-class-t-fuses): AutomationDirect Edison Class T fuses is a fuse holder product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-edison-class-t-fuses.md)
- [AutomationDirect Edison Power Distribution Blocks (Edison Power Distribution Blocks)](https://eloragrid.ai/objects/automationdirect-edison-power-distribution-blocks): AutomationDirect Edison Power Distribution Blocks is a distribution terminal block product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-edison-power-distribution-blocks.md)
- [AutomationDirect Stride VPN (Stride VPN)](https://eloragrid.ai/objects/automationdirect-stride-vpn): AutomationDirect Stride VPN is a industrial vpn router product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-stride-vpn.md)
- [AutomationDirect AcuAmp (AcuAmp)](https://eloragrid.ai/objects/automationdirect-acuamp): AutomationDirect AcuAmp is a signal conditioner product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/automationdirect-acuamp.md)
- [Fuji Electric BM3 manual motor starters (BM3 manual motor starters)](https://eloragrid.ai/objects/fuji-electric-bm3-manual-motor-starters): Fuji Electric BM3 manual motor starters is a motor-protection circuit breaker product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/fuji-electric-bm3-manual-motor-starters.md)
- [Fuji Electric SC contactors and thermal overload relays (GA)](https://eloragrid.ai/objects/fuji-electric-sc-contactors-and-thermal-overload-relays): Fuji Electric SC contactors and thermal overload relays is a power contactor product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/fuji-electric-sc-contactors-and-thermal-overload-relays.md)
- [Fuji Electric SC-NEXT contactors (SC-NEXT contactors)](https://eloragrid.ai/objects/fuji-electric-sc-next-contactors): Fuji Electric SC-NEXT contactors is a power contactor product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/fuji-electric-sc-next-contactors.md)
- [Fuji Electric Orange Line / Odyssey contactors (Orange Line / Odyssey contactors)](https://eloragrid.ai/objects/fuji-electric-orange-line-odyssey-contactors): Fuji Electric Orange Line / Odyssey contactors is a power contactor product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/fuji-electric-orange-line-odyssey-contactors.md)
- [Fuji Electric Combination starters (Combination starters)](https://eloragrid.ai/objects/fuji-electric-combination-starters): Fuji Electric Combination starters is a power contactor product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/fuji-electric-combination-starters.md)
- [Fuji Electric G-Twin Lambda circuit breakers (G-Twin Lambda circuit breakers)](https://eloragrid.ai/objects/fuji-electric-g-twin-lambda-circuit-breakers): Fuji Electric G-Twin Lambda circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/fuji-electric-g-twin-lambda-circuit-breakers.md)
- [Fuji Electric G-Twin circuit breakers (G-Twin circuit breakers)](https://eloragrid.ai/objects/fuji-electric-g-twin-circuit-breakers): Fuji Electric G-Twin circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/fuji-electric-g-twin-circuit-breakers.md)
- [Fuji Electric EA-UL / SA-UL circuit breakers (EA-UL / SA-UL circuit breakers)](https://eloragrid.ai/objects/fuji-electric-ea-ul-sa-ul-circuit-breakers): Fuji Electric EA-UL / SA-UL circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/fuji-electric-ea-ul-sa-ul-circuit-breakers.md)
- [Fuji Electric EG-UL / SG-UL circuit breakers (EG-UL / SG-UL circuit breakers)](https://eloragrid.ai/objects/fuji-electric-eg-ul-sg-ul-circuit-breakers): Fuji Electric EG-UL / SG-UL circuit breakers is a moulded-case circuit breaker product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/fuji-electric-eg-ul-sg-ul-circuit-breakers.md)
- [Fuji Electric SK contactors and relays (SK contactors and relays)](https://eloragrid.ai/objects/fuji-electric-sk-contactors-and-relays): Fuji Electric SK contactors and relays is a power contactor product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/fuji-electric-sk-contactors-and-relays.md)
- [TDK-Lambda D1SE120-xx-A3 (D1SE120-xx-A3)](https://eloragrid.ai/objects/tdk-lambda-d1se120-xx-a3): TDK-Lambda D1SE120-xx-A3 is a din-rail ac/dc power supply product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/tdk-lambda-d1se120-xx-a3.md)
- [TDK-Lambda D1SE240-xx-A3 (D1SE240-xx-A3)](https://eloragrid.ai/objects/tdk-lambda-d1se240-xx-a3): TDK-Lambda D1SE240-xx-A3 is a din-rail ac/dc power supply product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/tdk-lambda-d1se240-xx-a3.md)
- [TDK-Lambda D1SE480-xx-A3 (D1SE480-xx-A3)](https://eloragrid.ai/objects/tdk-lambda-d1se480-xx-a3): TDK-Lambda D1SE480-xx-A3 is a din-rail ac/dc power supply product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/tdk-lambda-d1se480-xx-a3.md)
- [TDK-Lambda DBM20 (DBM20)](https://eloragrid.ai/objects/tdk-lambda-dbm20): TDK-Lambda DBM20 is a dc buffer module model referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/tdk-lambda-dbm20.md)
- [TDK-Lambda DRB15 (DRB15)](https://eloragrid.ai/objects/tdk-lambda-drb15): TDK-Lambda DRB15 is a din-rail ac/dc power supply model referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/tdk-lambda-drb15.md)
- [TDK-Lambda DRB30 (DRB30)](https://eloragrid.ai/objects/tdk-lambda-drb30): TDK-Lambda DRB30 is a din-rail ac/dc power supply model referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/tdk-lambda-drb30.md)
- [TDK-Lambda DRB480 (DRB480)](https://eloragrid.ai/objects/tdk-lambda-drb480): TDK-Lambda DRB480 is a din-rail ac/dc power supply model referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/tdk-lambda-drb480.md)
- [TDK-Lambda DRF960 (DRF960)](https://eloragrid.ai/objects/tdk-lambda-drf960): TDK-Lambda DRF960 is a din-rail ac/dc power supply model referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/tdk-lambda-drf960.md)
- [TDK-Lambda DRM40 (DRM40)](https://eloragrid.ai/objects/tdk-lambda-drm40): TDK-Lambda DRM40 is a dc redundancy module model referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/tdk-lambda-drm40.md)
- [TDK-Lambda DUSH960-1248-1M (DUSH960-1248-1M)](https://eloragrid.ai/objects/tdk-lambda-dush960-1248-1m): TDK-Lambda DUSH960-1248-1M is a dc ups module model referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/tdk-lambda-dush960-1248-1m.md)
- [PULS QS20.241 (QS20.241)](https://eloragrid.ai/objects/puls-qs20-241): PULS QS20.241 is a din-rail ac/dc power supply model referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/puls-qs20-241.md)
- [Terasaki TemPower AT air circuit breakers (TemPower AT air circuit breakers)](https://eloragrid.ai/objects/terasaki-tempower-at-air-circuit-breakers): Terasaki TemPower AT air circuit breakers is a air circuit breaker product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/terasaki-tempower-at-air-circuit-breakers.md)
- [Terasaki / NHP TemBreak 1 legacy MCCBs (TemBreak 1 legacy MCCBs)](https://eloragrid.ai/objects/terasaki-nhp-tembreak-1-legacy-mccbs): Terasaki / NHP TemBreak 1 legacy MCCBs is a moulded-case circuit breaker product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/terasaki-nhp-tembreak-1-legacy-mccbs.md)
- [Schneider Electric MiCOM protection relays (MiCOM protection relays)](https://eloragrid.ai/objects/schneider-electric-micom-protection-relays): Schneider Electric MiCOM protection relays is a protection relay ied product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-micom-protection-relays.md)
- [Invertek Drives Optidrive Eco (Optidrive Eco)](https://eloragrid.ai/objects/invertek-drives-optidrive-eco): Invertek Drives Optidrive Eco is a variable-frequency drive product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/invertek-drives-optidrive-eco.md)
- [Schneider Electric MasterPact MTZ (MasterPact MTZ)](https://eloragrid.ai/objects/schneider-electric-masterpact-mtz): Schneider Electric MasterPact MTZ is a air circuit breaker product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-masterpact-mtz.md)
- [Schneider Electric MasterPacT MTZ Active (MasterPacT MTZ Active)](https://eloragrid.ai/objects/schneider-electric-masterpact-mtz-active): Schneider Electric MasterPacT MTZ Active is a air circuit breaker product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-masterpact-mtz-active.md)
- [Schneider Electric ComPacT NSX, new generation (ComPacT NSX, new generation)](https://eloragrid.ai/objects/schneider-electric-compact-nsx-new-generation): Schneider Electric ComPacT NSX, new generation is a moulded-case circuit breaker product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-compact-nsx-new-generation.md)
- [Schneider Electric ComPacT NSXm, new generation (ComPacT NSXm, new generation)](https://eloragrid.ai/objects/schneider-electric-compact-nsxm-new-generation): Schneider Electric ComPacT NSXm, new generation is a moulded-case circuit breaker product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-compact-nsxm-new-generation.md)
- [Schneider Electric ComPacT for DC networks, new generation (ComPacT for DC networks, new generation)](https://eloragrid.ai/objects/schneider-electric-compact-for-dc-networks-new-generation): Schneider Electric ComPacT for DC networks, new generation is a dc circuit breaker product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-compact-for-dc-networks-new-generation.md)
- [Schneider Electric Compact INS/INV (Compact INS/INV)](https://eloragrid.ai/objects/schneider-electric-compact-ins-inv): Schneider Electric Compact INS/INV is a switch disconnector product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-compact-ins-inv.md)
- [Schneider Electric Acti9 iC60 (Acti9 iC60)](https://eloragrid.ai/objects/schneider-electric-acti9-ic60): Schneider Electric Acti9 iC60 is a miniature circuit breaker product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-acti9-ic60.md)
- [Schneider Electric Acti9 iC60 RCBO (Acti9 iC60 RCBO)](https://eloragrid.ai/objects/schneider-electric-acti9-ic60-rcbo): Schneider Electric Acti9 iC60 RCBO is a residual-current breaker with overcurrent protection product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-acti9-ic60-rcbo.md)
- [Schneider Electric PrismaSeT 6300 (PrismaSeT 6300)](https://eloragrid.ai/objects/schneider-electric-prismaset-6300): Schneider Electric PrismaSeT 6300 is a floor-standing enclosure product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-prismaset-6300.md)
- [Schneider Electric PrismaSeT G (PrismaSeT G)](https://eloragrid.ai/objects/schneider-electric-prismaset-g): Schneider Electric PrismaSeT G is a floor-standing enclosure product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-prismaset-g.md)
- [Schneider Electric TeSys K contactors (TeSys K contactors)](https://eloragrid.ai/objects/schneider-electric-tesys-k-contactors): Schneider Electric TeSys K contactors is a power contactor product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-tesys-k-contactors.md)
- [Schneider Electric TeSys Giga contactors (TeSys Giga contactors)](https://eloragrid.ai/objects/schneider-electric-tesys-giga-contactors): Schneider Electric TeSys Giga contactors is a power contactor product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-tesys-giga-contactors.md)
- [Schneider Electric TeSys Deca overload relays (TeSys Deca overload relays)](https://eloragrid.ai/objects/schneider-electric-tesys-deca-overload-relays): Schneider Electric TeSys Deca overload relays is a thermal overload relay product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-tesys-deca-overload-relays.md)
- [Schneider Electric TeSys GV2, LC (TeSys GV2, LC)](https://eloragrid.ai/objects/schneider-electric-tesys-gv2-lc): Schneider Electric TeSys GV2, LC is a motor-protection circuit breaker product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-tesys-gv2-lc.md)
- [Schneider Electric PowerLogic PM5000 (PowerLogic PM5000)](https://eloragrid.ai/objects/schneider-electric-powerlogic-pm5000): Schneider Electric PowerLogic PM5000 is a panel power meter product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-powerlogic-pm5000.md)
- [Schneider Electric PowerLogic PM8000 (PowerLogic PM8000)](https://eloragrid.ai/objects/schneider-electric-powerlogic-pm8000): Schneider Electric PowerLogic PM8000 is a panel power meter product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-powerlogic-pm8000.md)
- [Schneider Electric PowerLogic P5 protection relays (PowerLogic P5 protection relays)](https://eloragrid.ai/objects/schneider-electric-powerlogic-p5-protection-relays): Schneider Electric PowerLogic P5 protection relays is a protection relay ied product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-powerlogic-p5-protection-relays.md)
- [Schneider Electric PowerLogic PFC Capacitor Banks (PowerLogic PFC Capacitor Banks)](https://eloragrid.ai/objects/schneider-electric-powerlogic-pfc-capacitor-banks): Schneider Electric PowerLogic PFC Capacitor Banks is a power-factor-correction capacitor bank product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-powerlogic-pfc-capacitor-banks.md)
- [Schneider Electric PowerLogic T500 Substation Controller (PowerLogic T500 Substation Controller)](https://eloragrid.ai/objects/schneider-electric-powerlogic-t500-substation-controller): Schneider Electric PowerLogic T500 Substation Controller is a substation rtu product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-powerlogic-t500-substation-controller.md)
- [Schneider Electric TransferPacT (TransferPacT)](https://eloragrid.ai/objects/schneider-electric-transferpact): Schneider Electric TransferPacT is a source-transfer switch assembly product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/schneider-electric-transferpact.md)
- [ABB MNS switchgear (MNS switchgear)](https://eloragrid.ai/objects/abb-mns-switchgear): ABB MNS switchgear is a low-voltage switchgear lineup product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/abb-mns-switchgear.md)
- [ABB ReliaGear SG switchgear (ReliaGear SG switchgear)](https://eloragrid.ai/objects/abb-reliagear-sg-switchgear): ABB ReliaGear SG switchgear is a low-voltage switchgear lineup product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/abb-reliagear-sg-switchgear.md)
- [ABB UniGear switchgear (UniGear switchgear)](https://eloragrid.ai/objects/abb-unigear-switchgear): ABB UniGear switchgear is a medium-voltage switchgear lineup product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/abb-unigear-switchgear.md)
- [Protection relay IED (GA)](https://eloragrid.ai/objects/ga-protection-relay-ied): A protection relay IED implements the selected measurement, protection and control functions. [Markdown](https://eloragrid.ai/library/entries/ga-protection-relay-ied.md)
- [Medium-voltage switchgear lineup (GA)](https://eloragrid.ai/objects/ga-medium-voltage-switchgear-lineup): A medium-voltage switchgear lineup groups specified switching, protection and connection panels. [Markdown](https://eloragrid.ai/library/entries/ga-medium-voltage-switchgear-lineup.md)
- [Low-voltage switchgear lineup (GA)](https://eloragrid.ai/objects/ga-low-voltage-switchgear-lineup): A low-voltage switchgear lineup groups specified incoming, outgoing and bus-section equipment. [Markdown](https://eloragrid.ai/library/entries/ga-low-voltage-switchgear-lineup.md)
- [Source-transfer switch assembly (GA)](https://eloragrid.ai/objects/ga-source-transfer-switch-assembly): A source-transfer assembly provides the documented switching arrangement between alternative supplies. [Markdown](https://eloragrid.ai/library/entries/ga-source-transfer-switch-assembly.md)
- [Substation RTU (GA)](https://eloragrid.ai/objects/ga-substation-rtu): A substation RTU provides the specified monitoring, control and communications interface. [Markdown](https://eloragrid.ai/library/entries/ga-substation-rtu.md)
- [Industrial ventilation fan (GA)](https://eloragrid.ai/objects/ga-industrial-ventilation-fan): An industrial ventilation fan moves air through a selected room or equipment ventilation route. [Markdown](https://eloragrid.ai/library/entries/ga-industrial-ventilation-fan.md)
- [Lithium battery module (GA)](https://eloragrid.ai/objects/ga-lithium-battery-module): A lithium battery module stores energy and connects through the specified battery management arrangement. [Markdown](https://eloragrid.ai/library/entries/ga-lithium-battery-module.md)
- [DIN-rail adapter accessory (GA)](https://eloragrid.ai/objects/ga-din-rail-adapter-accessory): A DIN-rail adapter provides the selected interface between a device and a mounting rail. [Markdown](https://eloragrid.ai/library/entries/ga-din-rail-adapter-accessory.md)
- [Combined fire-smoke damper (GA)](https://eloragrid.ai/objects/ga-combined-fire-smoke-damper): A combined fire-smoke damper forms the specified closure and airflow-control interface at a building air passage. [Markdown](https://eloragrid.ai/library/entries/ga-combined-fire-smoke-damper.md)
- [Victron Energy MultiPlus-II (MultiPlus-II)](https://eloragrid.ai/objects/victron-energy-multiplus-ii): Victron Energy MultiPlus-II is a battery inverter-charger product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/victron-energy-multiplus-ii.md)
- [Victron Energy Quattro (Quattro)](https://eloragrid.ai/objects/victron-energy-quattro): Victron Energy Quattro is a battery inverter-charger product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/victron-energy-quattro.md)
- [Victron Energy SmartSolar MPPT RS (SmartSolar MPPT RS)](https://eloragrid.ai/objects/victron-energy-smartsolar-mppt-rs): Victron Energy SmartSolar MPPT RS is a mppt solar charge controller product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/victron-energy-smartsolar-mppt-rs.md)
- [Victron Energy Cerbo GX (Cerbo GX)](https://eloragrid.ai/objects/victron-energy-cerbo-gx): Victron Energy Cerbo GX is a energy-management controller product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/victron-energy-cerbo-gx.md)
- [Victron Energy Lynx Distributor (Lynx Distributor)](https://eloragrid.ai/objects/victron-energy-lynx-distributor): Victron Energy Lynx Distributor is a battery dc bus distribution module product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/victron-energy-lynx-distributor.md)
- [Victron Energy Lynx Smart BMS NG (Lynx Smart BMS NG)](https://eloragrid.ai/objects/victron-energy-lynx-smart-bms-ng): Victron Energy Lynx Smart BMS NG is a battery management system module product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/victron-energy-lynx-smart-bms-ng.md)
- [Victron Energy Lithium NG Batteries (Lithium NG Batteries)](https://eloragrid.ai/objects/victron-energy-lithium-ng-batteries): Victron Energy Lithium NG Batteries is a lithium battery module product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/victron-energy-lithium-ng-batteries.md)
- [Victron Energy SmartShunt (SmartShunt)](https://eloragrid.ai/objects/victron-energy-smartshunt): Victron Energy SmartShunt is a battery current shunt product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/victron-energy-smartshunt.md)
- [Victron Energy Skylla-IP65 (Skylla-IP65)](https://eloragrid.ai/objects/victron-energy-skylla-ip65): Victron Energy Skylla-IP65 is a battery charger product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/victron-energy-skylla-ip65.md)
- [Victron Energy Multi RS Solar (Multi RS Solar)](https://eloragrid.ai/objects/victron-energy-multi-rs-solar): Victron Energy Multi RS Solar is a battery inverter-charger product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/victron-energy-multi-rs-solar.md)
- [Victron Energy MultiPlus-II 2x 120V (MultiPlus-II 2x 120V)](https://eloragrid.ai/objects/victron-energy-multiplus-ii-2x-120v): Victron Energy MultiPlus-II 2x 120V is a battery inverter-charger product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/victron-energy-multiplus-ii-2x-120v.md)
- [Victron Energy DIN35 adapter (DIN35 adapter)](https://eloragrid.ai/objects/victron-energy-din35-adapter): Victron Energy DIN35 adapter is a din-rail adapter accessory product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/victron-energy-din35-adapter.md)
- [DEIF iE 250 controllers (iE 250 controllers)](https://eloragrid.ai/objects/deif-ie-250-controllers): DEIF iE 250 controllers is a generator paralleling controller product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/deif-ie-250-controllers.md)
- [Westermo PS2-60 (PS2-60)](https://eloragrid.ai/objects/westermo-ps2-60): Westermo PS2-60 is a din-rail ac/dc power supply model referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/westermo-ps2-60.md)
- [Westermo Lynx 5612-E-F4G-T8G-LV (Lynx 5612-E-F4G-T8G-LV)](https://eloragrid.ai/objects/westermo-lynx-5612-e-f4g-t8g-lv): Westermo Lynx 5612-E-F4G-T8G-LV is a industrial ethernet switch model referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/westermo-lynx-5612-e-f4g-t8g-lv.md)
- [Dagartech BGPSW 15 ST (BGPSW 15 ST)](https://eloragrid.ai/objects/dagartech-bgpsw-15-st): Dagartech BGPSW 15 ST is a diesel generator-set configuration documented on its official product page. [Markdown](https://eloragrid.ai/library/entries/dagartech-bgpsw-15-st.md)
- [Dagartech DGB 415 ST (DGB 415 ST)](https://eloragrid.ai/objects/dagartech-dgb-415-st): Dagartech DGB 415 ST is a diesel generator-set configuration documented on its official product page. [Markdown](https://eloragrid.ai/library/entries/dagartech-dgb-415-st.md)
- [Greenheck QEI inline fan (QEI inline fan)](https://eloragrid.ai/objects/greenheck-qei-inline-fan): Greenheck QEI inline fan is a industrial ventilation fan product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-qei-inline-fan.md)
- [Greenheck QEID inline fan (QEID inline fan)](https://eloragrid.ai/objects/greenheck-qeid-inline-fan): Greenheck QEID inline fan is a industrial ventilation fan product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-qeid-inline-fan.md)
- [Greenheck TBI-FS inline fan (TBI-FS inline fan)](https://eloragrid.ai/objects/greenheck-tbi-fs-inline-fan): Greenheck TBI-FS inline fan is a industrial ventilation fan product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-tbi-fs-inline-fan.md)
- [Greenheck VAB fan (VAB fan)](https://eloragrid.ai/objects/greenheck-vab-fan): Greenheck VAB fan is a industrial ventilation fan product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-vab-fan.md)
- [Greenheck VAD fan (VAD fan)](https://eloragrid.ai/objects/greenheck-vad-fan): Greenheck VAD fan is a industrial ventilation fan product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-vad-fan.md)
- [Greenheck USF fan (USF fan)](https://eloragrid.ai/objects/greenheck-usf-fan): Greenheck USF fan is a industrial ventilation fan product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-usf-fan.md)
- [Greenheck APH plenum fan (APH plenum fan)](https://eloragrid.ai/objects/greenheck-aph-plenum-fan): Greenheck APH plenum fan is a industrial ventilation fan product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-aph-plenum-fan.md)
- [Greenheck SBE wall fan (SBE wall fan)](https://eloragrid.ai/objects/greenheck-sbe-wall-fan): Greenheck SBE wall fan is a industrial ventilation fan product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-sbe-wall-fan.md)
- [Greenheck SBS wall fan (SBS wall fan)](https://eloragrid.ai/objects/greenheck-sbs-wall-fan): Greenheck SBS wall fan is a industrial ventilation fan product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-sbs-wall-fan.md)
- [Greenheck SE wall fan (SE wall fan)](https://eloragrid.ai/objects/greenheck-se-wall-fan): Greenheck SE wall fan is a industrial ventilation fan product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-se-wall-fan.md)
- [Greenheck ESD-435 louver (ESD-435 louver)](https://eloragrid.ai/objects/greenheck-esd-435-louver): Greenheck ESD-435 louver is a ventilation intake louver product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-esd-435-louver.md)
- [Greenheck ESD-635 louver (ESD-635 louver)](https://eloragrid.ai/objects/greenheck-esd-635-louver): Greenheck ESD-635 louver is a ventilation intake louver product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-esd-635-louver.md)
- [Greenheck AFL-501 louver (AFL-501 louver)](https://eloragrid.ai/objects/greenheck-afl-501-louver): Greenheck AFL-501 louver is a ventilation intake louver product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-afl-501-louver.md)
- [Greenheck FSD-311 damper (FSD-311 damper)](https://eloragrid.ai/objects/greenheck-fsd-311-damper): Greenheck FSD-311 damper is a combined fire-smoke damper product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-fsd-311-damper.md)
- [Greenheck FSD-211 damper (FSD-211 damper)](https://eloragrid.ai/objects/greenheck-fsd-211-damper): Greenheck FSD-211 damper is a combined fire-smoke damper product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-fsd-211-damper.md)
- [Greenheck FD-150 damper (FD-150 damper)](https://eloragrid.ai/objects/greenheck-fd-150-damper): Greenheck FD-150 damper is a fire damper product family referenced for electrical equipment layout. [Markdown](https://eloragrid.ai/library/entries/greenheck-fd-150-damper.md)
- [Power cable joint (CABLE JOINT)](https://eloragrid.ai/objects/ga-cable-joint): An assembly joining power-cable sections while maintaining the required conductor, insulation, screen and environmental interfaces. [Markdown](https://eloragrid.ai/library/entries/ga-cable-joint.md)
- [Power quality meter (PQM)](https://eloragrid.ai/objects/ga-power-quality-meter): A measuring device used to monitor electrical quantities and documented power-quality events or waveform characteristics. [Markdown](https://eloragrid.ai/library/entries/ga-power-quality-meter.md)
- [Capacitor voltage transformer (CVT / CCVT)](https://eloragrid.ai/symbols/capacitor-voltage-transformer): An instrument transformer using a capacitive voltage divider and an electromagnetic unit to supply documented voltage measurement or protection signals. [Markdown](https://eloragrid.ai/library/entries/capacitor-voltage-transformer.md)
- [ANSI/IEEE circuit breaker symbol (CB)](https://eloragrid.ai/symbols/ansi-circuit-breaker): IEEE-oriented graphical reference for circuit breaker, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-circuit-breaker.md)
- [ANSI/IEEE thermal circuit breaker symbol (CB TH)](https://eloragrid.ai/symbols/ansi-thermal-circuit-breaker): IEEE-oriented graphical reference for thermal circuit breaker, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-thermal-circuit-breaker.md)
- [ANSI/IEEE thermal-magnetic circuit breaker symbol (CB TM)](https://eloragrid.ai/symbols/ansi-thermal-magnetic-circuit-breaker): IEEE-oriented graphical reference for thermal-magnetic circuit breaker, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-thermal-magnetic-circuit-breaker.md)
- [ANSI/IEEE current-limiting circuit breaker symbol (CB LIM)](https://eloragrid.ai/symbols/ansi-current-limiting-circuit-breaker): IEEE-oriented graphical reference for current-limiting circuit breaker, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-current-limiting-circuit-breaker.md)
- [ANSI/IEEE circuit breaker with undervoltage release symbol (CB UV)](https://eloragrid.ai/symbols/ansi-circuit-breaker-with-undervoltage-release): IEEE-oriented graphical reference for circuit breaker with undervoltage release, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-circuit-breaker-with-undervoltage-release.md)
- [ANSI/IEEE circuit breaker with electronic trip unit symbol (CB ETU)](https://eloragrid.ai/symbols/ansi-circuit-breaker-with-electronic-trip-unit): IEEE-oriented graphical reference for circuit breaker with electronic trip unit, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-circuit-breaker-with-electronic-trip-unit.md)
- [ANSI/IEEE disconnector symbol (Isolator)](https://eloragrid.ai/symbols/ansi-disconnector): IEEE-oriented graphical reference for disconnector, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-disconnector.md)
- [ANSI/IEEE switch-disconnector symbol (SD)](https://eloragrid.ai/symbols/ansi-switch-disconnector): IEEE-oriented graphical reference for switch-disconnector, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-switch-disconnector.md)
- [ANSI/IEEE lockable disconnector symbol (DS LOCK)](https://eloragrid.ai/symbols/ansi-lockable-disconnector): IEEE-oriented graphical reference for lockable disconnector, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-lockable-disconnector.md)
- [ANSI/IEEE lockable switch-disconnector symbol (SD LOCK)](https://eloragrid.ai/symbols/ansi-lockable-switch-disconnector): IEEE-oriented graphical reference for lockable switch-disconnector, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-lockable-switch-disconnector.md)
- [ANSI/IEEE fused switch symbol (SW FUSE)](https://eloragrid.ai/symbols/ansi-fused-switch): IEEE-oriented graphical reference for fused switch, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-fused-switch.md)
- [ANSI/IEEE fuse symbol (FU)](https://eloragrid.ai/symbols/ansi-fuse): IEEE-oriented graphical reference for fuse, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-fuse.md)
- [ANSI/IEEE fuse-switch symbol (FUSE SW)](https://eloragrid.ai/symbols/ansi-fuse-switch): IEEE-oriented graphical reference for fuse-switch, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-fuse-switch.md)
- [ANSI/IEEE current transformer symbol (CT)](https://eloragrid.ai/symbols/ansi-current-transformer): IEEE-oriented graphical reference for current transformer, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-current-transformer.md)
- [ANSI/IEEE current transformer with two secondaries symbol (CT 2SEC)](https://eloragrid.ai/symbols/ansi-current-transformer-with-two-secondaries): IEEE-oriented graphical reference for current transformer with two secondaries, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-current-transformer-with-two-secondaries.md)
- [ANSI/IEEE tapped-secondary current transformer symbol (CT TAP)](https://eloragrid.ai/symbols/ansi-tapped-secondary-current-transformer): IEEE-oriented graphical reference for tapped-secondary current transformer, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-tapped-secondary-current-transformer.md)
- [ANSI/IEEE voltage transformer symbol (VT / PT)](https://eloragrid.ai/symbols/ansi-voltage-transformer): IEEE-oriented graphical reference for voltage transformer, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-voltage-transformer.md)
- [ANSI/IEEE power transformer symbol (TX)](https://eloragrid.ai/symbols/ansi-power-transformer): IEEE-oriented graphical reference for power transformer, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-power-transformer.md)
- [ANSI/IEEE electrostatically screened transformer symbol (TX SCREEN)](https://eloragrid.ai/symbols/ansi-electrostatically-screened-transformer): IEEE-oriented graphical reference for electrostatically screened transformer, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-electrostatically-screened-transformer.md)
- [ANSI/IEEE three-winding transformer symbol (TX 3W)](https://eloragrid.ai/symbols/ansi-three-winding-transformer): IEEE-oriented graphical reference for three-winding transformer, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-three-winding-transformer.md)
- [ANSI/IEEE adjustable-ratio transformer symbol (TX ADJ)](https://eloragrid.ai/symbols/ansi-adjustable-ratio-transformer): IEEE-oriented graphical reference for adjustable-ratio transformer, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-adjustable-ratio-transformer.md)
- [ANSI/IEEE single-phase autotransformer symbol (AT 1PH)](https://eloragrid.ai/symbols/ansi-single-phase-autotransformer): IEEE-oriented graphical reference for single-phase autotransformer, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-single-phase-autotransformer.md)
- [ANSI/IEEE reactor symbol (L)](https://eloragrid.ai/symbols/ansi-reactor): IEEE-oriented graphical reference for reactor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-reactor.md)
- [ANSI/IEEE iron-core reactor symbol (L IRON)](https://eloragrid.ai/symbols/ansi-iron-core-reactor): IEEE-oriented graphical reference for iron-core reactor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-iron-core-reactor.md)
- [ANSI/IEEE gapped-core inductor symbol (L GAP)](https://eloragrid.ai/symbols/ansi-gapped-core-inductor): IEEE-oriented graphical reference for gapped-core inductor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-gapped-core-inductor.md)
- [ANSI/IEEE adjustable-core inductor symbol (L ADJ)](https://eloragrid.ai/symbols/ansi-adjustable-core-inductor): IEEE-oriented graphical reference for adjustable-core inductor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-adjustable-core-inductor.md)
- [ANSI/IEEE normally open contact symbol (NO)](https://eloragrid.ai/symbols/ansi-normally-open-contact): IEEE-oriented graphical reference for normally open contact, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-normally-open-contact.md)
- [ANSI/IEEE normally closed contact symbol (NC)](https://eloragrid.ai/symbols/ansi-normally-closed-contact): IEEE-oriented graphical reference for normally closed contact, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-normally-closed-contact.md)
- [ANSI/IEEE changeover contact symbol (CO)](https://eloragrid.ai/symbols/ansi-changeover-contact): IEEE-oriented graphical reference for changeover contact, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-changeover-contact.md)
- [ANSI/IEEE relay coil symbol (Coil)](https://eloragrid.ai/symbols/ansi-relay-coil): IEEE-oriented graphical reference for relay coil, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-relay-coil.md)
- [ANSI/IEEE mechanically latched relay coil symbol (K LATCH)](https://eloragrid.ai/symbols/ansi-mechanically-latched-relay-coil): IEEE-oriented graphical reference for mechanically latched relay coil, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-mechanically-latched-relay-coil.md)
- [ANSI/IEEE relay reset coil symbol (K RESET)](https://eloragrid.ai/symbols/ansi-relay-reset-coil): IEEE-oriented graphical reference for relay reset coil, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-relay-reset-coil.md)
- [ANSI/IEEE polarised relay coil symbol (K POL)](https://eloragrid.ai/symbols/ansi-polarised-relay-coil): IEEE-oriented graphical reference for polarised relay coil, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-polarised-relay-coil.md)
- [ANSI/IEEE ac relay coil symbol (K AC)](https://eloragrid.ai/symbols/ansi-ac-relay-coil): IEEE-oriented graphical reference for ac relay coil, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-ac-relay-coil.md)
- [ANSI/IEEE relay coil with diode suppression symbol (K DIODE)](https://eloragrid.ai/symbols/ansi-relay-coil-with-diode-suppression): IEEE-oriented graphical reference for relay coil with diode suppression, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-relay-coil-with-diode-suppression.md)
- [ANSI/IEEE relay coil with rc suppression symbol (K RC)](https://eloragrid.ai/symbols/ansi-relay-coil-with-rc-suppression): IEEE-oriented graphical reference for relay coil with rc suppression, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-relay-coil-with-rc-suppression.md)
- [ANSI/IEEE on-delay timer relay symbol (TON)](https://eloragrid.ai/symbols/ansi-on-delay-timer-relay): IEEE-oriented graphical reference for on-delay timer relay, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-on-delay-timer-relay.md)
- [ANSI/IEEE off-delay timer relay symbol (TOFF)](https://eloragrid.ai/symbols/ansi-off-delay-timer-relay): IEEE-oriented graphical reference for off-delay timer relay, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-off-delay-timer-relay.md)
- [ANSI/IEEE maintained normally-open contact symbol (NO HOLD)](https://eloragrid.ai/symbols/ansi-maintained-normally-open-contact): IEEE-oriented graphical reference for maintained normally-open contact, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-maintained-normally-open-contact.md)
- [ANSI/IEEE maintained normally-closed contact symbol (NC HOLD)](https://eloragrid.ai/symbols/ansi-maintained-normally-closed-contact): IEEE-oriented graphical reference for maintained normally-closed contact, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-maintained-normally-closed-contact.md)
- [ANSI/IEEE early-make normally-open contact symbol (NO EARLY)](https://eloragrid.ai/symbols/ansi-early-make-normally-open-contact): IEEE-oriented graphical reference for early-make normally-open contact, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-early-make-normally-open-contact.md)
- [ANSI/IEEE late-make normally-open contact symbol (NO LATE)](https://eloragrid.ai/symbols/ansi-late-make-normally-open-contact): IEEE-oriented graphical reference for late-make normally-open contact, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-late-make-normally-open-contact.md)
- [ANSI/IEEE early-break normally-closed contact symbol (NC EARLY)](https://eloragrid.ai/symbols/ansi-early-break-normally-closed-contact): IEEE-oriented graphical reference for early-break normally-closed contact, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-early-break-normally-closed-contact.md)
- [ANSI/IEEE late-break normally-closed contact symbol (NC LATE)](https://eloragrid.ai/symbols/ansi-late-break-normally-closed-contact): IEEE-oriented graphical reference for late-break normally-closed contact, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-late-break-normally-closed-contact.md)
- [ANSI/IEEE motor overload trip nc contact symbol (OL NC)](https://eloragrid.ai/symbols/ansi-motor-overload-trip-nc-contact): IEEE-oriented graphical reference for motor overload trip nc contact, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-motor-overload-trip-nc-contact.md)
- [ANSI/IEEE motor overload alarm no contact symbol (OL NO)](https://eloragrid.ai/symbols/ansi-motor-overload-alarm-no-contact): IEEE-oriented graphical reference for motor overload alarm no contact, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-motor-overload-alarm-no-contact.md)
- [ANSI/IEEE normally open pushbutton symbol (PB NO)](https://eloragrid.ai/symbols/ansi-pushbutton-no): IEEE-oriented graphical reference for normally open pushbutton, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-pushbutton-no.md)
- [ANSI/IEEE normally closed pushbutton symbol (PB NC)](https://eloragrid.ai/symbols/ansi-pushbutton-nc): IEEE-oriented graphical reference for normally closed pushbutton, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-pushbutton-nc.md)
- [ANSI/IEEE illuminated normally-open pushbutton symbol (PB NO LAMP)](https://eloragrid.ai/symbols/ansi-illuminated-normally-open-pushbutton): IEEE-oriented graphical reference for illuminated normally-open pushbutton, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-illuminated-normally-open-pushbutton.md)
- [ANSI/IEEE illuminated normally-closed pushbutton symbol (PB NC LAMP)](https://eloragrid.ai/symbols/ansi-illuminated-normally-closed-pushbutton): IEEE-oriented graphical reference for illuminated normally-closed pushbutton, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-illuminated-normally-closed-pushbutton.md)
- [ANSI/IEEE maintained normally-open pushbutton symbol (PB NO HOLD)](https://eloragrid.ai/symbols/ansi-maintained-normally-open-pushbutton): IEEE-oriented graphical reference for maintained normally-open pushbutton, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-maintained-normally-open-pushbutton.md)
- [ANSI/IEEE maintained normally-closed pushbutton symbol (PB NC HOLD)](https://eloragrid.ai/symbols/ansi-maintained-normally-closed-pushbutton): IEEE-oriented graphical reference for maintained normally-closed pushbutton, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-maintained-normally-closed-pushbutton.md)
- [ANSI/IEEE selector switch symbol (SS)](https://eloragrid.ai/symbols/ansi-selector-switch): IEEE-oriented graphical reference for selector switch, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-selector-switch.md)
- [ANSI/IEEE three-position maintained selector symbol (SEL 3 HOLD)](https://eloragrid.ai/symbols/ansi-three-position-maintained-selector): IEEE-oriented graphical reference for three-position maintained selector, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-three-position-maintained-selector.md)
- [ANSI/IEEE three-position centre-return selector symbol (SEL 3 CRET)](https://eloragrid.ai/symbols/ansi-three-position-centre-return-selector): IEEE-oriented graphical reference for three-position centre-return selector, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-three-position-centre-return-selector.md)
- [ANSI/IEEE three-position key selector symbol (KEY SEL 3)](https://eloragrid.ai/symbols/ansi-three-position-key-selector): IEEE-oriented graphical reference for three-position key selector, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-three-position-key-selector.md)
- [ANSI/IEEE four-position maintained selector symbol (SEL 4 HOLD)](https://eloragrid.ai/symbols/ansi-four-position-maintained-selector): IEEE-oriented graphical reference for four-position maintained selector, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-four-position-maintained-selector.md)
- [ANSI/IEEE four-position key selector symbol (KEY SEL 4)](https://eloragrid.ai/symbols/ansi-four-position-key-selector): IEEE-oriented graphical reference for four-position key selector, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-four-position-key-selector.md)
- [ANSI/IEEE normally-open limit switch symbol (LS NO)](https://eloragrid.ai/symbols/ansi-normally-open-limit-switch): IEEE-oriented graphical reference for normally-open limit switch, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-normally-open-limit-switch.md)
- [ANSI/IEEE normally-closed limit switch symbol (LS NC)](https://eloragrid.ai/symbols/ansi-normally-closed-limit-switch): IEEE-oriented graphical reference for normally-closed limit switch, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-normally-closed-limit-switch.md)
- [ANSI/IEEE roller-operated limit switch symbol (LS ROLLER)](https://eloragrid.ai/symbols/ansi-roller-operated-limit-switch): IEEE-oriented graphical reference for roller-operated limit switch, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-roller-operated-limit-switch.md)
- [ANSI/IEEE pressure switch no symbol (PS NO)](https://eloragrid.ai/symbols/ansi-pressure-switch-no): IEEE-oriented graphical reference for pressure switch no, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-pressure-switch-no.md)
- [ANSI/IEEE pressure switch nc symbol (PS NC)](https://eloragrid.ai/symbols/ansi-pressure-switch-nc): IEEE-oriented graphical reference for pressure switch nc, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-pressure-switch-nc.md)
- [ANSI/IEEE temperature switch no symbol (TS NO)](https://eloragrid.ai/symbols/ansi-temperature-switch-no): IEEE-oriented graphical reference for temperature switch no, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-temperature-switch-no.md)
- [ANSI/IEEE temperature switch nc symbol (TS NC)](https://eloragrid.ai/symbols/ansi-temperature-switch-nc): IEEE-oriented graphical reference for temperature switch nc, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-temperature-switch-nc.md)
- [ANSI/IEEE float level switch no symbol (LS FLOAT NO)](https://eloragrid.ai/symbols/ansi-float-level-switch-no): IEEE-oriented graphical reference for float level switch no, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-float-level-switch-no.md)
- [ANSI/IEEE float level switch nc symbol (LS FLOAT NC)](https://eloragrid.ai/symbols/ansi-float-level-switch-nc): IEEE-oriented graphical reference for float level switch nc, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-float-level-switch-nc.md)
- [ANSI/IEEE liquid flow switch symbol (FS LIQ)](https://eloragrid.ai/symbols/ansi-liquid-flow-switch): IEEE-oriented graphical reference for liquid flow switch, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-liquid-flow-switch.md)
- [ANSI/IEEE terminal connection symbol (Terminal)](https://eloragrid.ai/symbols/ansi-terminal): IEEE-oriented graphical reference for terminal connection, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-terminal.md)
- [ANSI/IEEE numbered terminal symbol (TERM 1)](https://eloragrid.ai/symbols/ansi-numbered-terminal): IEEE-oriented numbered connection-point form, with public vendor evidence and terminal-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-numbered-terminal.md)
- [ANSI/IEEE plug and socket connector pair symbol (PLUG SOCKET)](https://eloragrid.ai/symbols/ansi-plug-and-socket-connector-pair): IEEE-oriented graphical reference for plug and socket connector pair, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-plug-and-socket-connector-pair.md)
- [ANSI/IEEE connector plug half symbol (PLUG)](https://eloragrid.ai/symbols/ansi-connector-plug-half): IEEE-oriented graphical reference for connector plug half, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-connector-plug-half.md)
- [ANSI/IEEE connector socket half symbol (SOCKET)](https://eloragrid.ai/symbols/ansi-connector-socket-half): IEEE-oriented graphical reference for connector socket half, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-connector-socket-half.md)
- [ANSI/IEEE wire splice symbol (SPLICE)](https://eloragrid.ai/symbols/ansi-wire-splice): IEEE-oriented graphical reference for wire splice, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-wire-splice.md)
- [ANSI/IEEE protective earth symbol (PE)](https://eloragrid.ai/symbols/ansi-protective-earth): IEEE-oriented graphical reference for protective earth, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-protective-earth.md)
- [ANSI/IEEE functional earth symbol (FE)](https://eloragrid.ai/symbols/ansi-functional-earth): IEEE-oriented graphical reference for functional earth, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-functional-earth.md)
- [ANSI/IEEE resistor symbol (R)](https://eloragrid.ai/symbols/ansi-resistor): IEEE-oriented graphical reference for resistor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-resistor.md)
- [ANSI/IEEE variable resistor symbol (R VAR)](https://eloragrid.ai/symbols/ansi-variable-resistor): IEEE-oriented graphical reference for variable resistor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-variable-resistor.md)
- [ANSI/IEEE potentiometer symbol (POT)](https://eloragrid.ai/symbols/ansi-potentiometer): IEEE-oriented graphical reference for potentiometer, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-potentiometer.md)
- [ANSI/IEEE light-dependent resistor symbol (LDR)](https://eloragrid.ai/symbols/ansi-light-dependent-resistor): IEEE-oriented graphical reference for light-dependent resistor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-light-dependent-resistor.md)
- [ANSI/IEEE heating element symbol (HEATER)](https://eloragrid.ai/symbols/ansi-heating-element): IEEE-oriented graphical reference for heating element, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-heating-element.md)
- [ANSI/IEEE varistor symbol (VDR)](https://eloragrid.ai/symbols/ansi-varistor): IEEE-oriented graphical reference for varistor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-varistor.md)
- [ANSI/IEEE current-measuring shunt symbol (SHUNT)](https://eloragrid.ai/symbols/ansi-current-measuring-shunt): IEEE-oriented graphical reference for current-measuring shunt, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-current-measuring-shunt.md)
- [ANSI/IEEE capacitor symbol (C)](https://eloragrid.ai/symbols/ansi-capacitor): IEEE-oriented graphical reference for capacitor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-capacitor.md)
- [ANSI/IEEE electrolytic capacitor symbol (C ELEC)](https://eloragrid.ai/symbols/ansi-electrolytic-capacitor): IEEE-oriented graphical reference for electrolytic capacitor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-electrolytic-capacitor.md)
- [ANSI/IEEE feedthrough capacitor symbol (C FEED)](https://eloragrid.ai/symbols/ansi-feedthrough-capacitor): IEEE-oriented graphical reference for feedthrough capacitor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-feedthrough-capacitor.md)
- [ANSI/IEEE adjustable capacitor symbol (C ADJ)](https://eloragrid.ai/symbols/ansi-adjustable-capacitor): IEEE-oriented graphical reference for adjustable capacitor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-adjustable-capacitor.md)
- [ANSI/IEEE diode symbol (D)](https://eloragrid.ai/symbols/ansi-diode): IEEE-oriented graphical reference for diode, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-diode.md)
- [ANSI/IEEE photodiode symbol (PD)](https://eloragrid.ai/symbols/ansi-photodiode): IEEE-oriented graphical reference for photodiode, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-photodiode.md)
- [ANSI/IEEE zener diode symbol (ZD)](https://eloragrid.ai/symbols/ansi-zener-diode): IEEE-oriented graphical reference for zener diode, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-zener-diode.md)
- [ANSI/IEEE single-phase bridge rectifier symbol (BR 1PH)](https://eloragrid.ai/symbols/ansi-single-phase-bridge-rectifier): IEEE-oriented graphical reference for single-phase bridge rectifier, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-single-phase-bridge-rectifier.md)
- [ANSI/IEEE silicon-controlled rectifier symbol (SCR)](https://eloragrid.ai/symbols/ansi-silicon-controlled-rectifier): IEEE-oriented graphical reference for silicon-controlled rectifier, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-silicon-controlled-rectifier.md)
- [ANSI/IEEE triac symbol (TRIAC)](https://eloragrid.ai/symbols/ansi-triac): IEEE-oriented graphical reference for triac, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-triac.md)
- [ANSI/IEEE voltmeter symbol (V)](https://eloragrid.ai/symbols/ansi-voltmeter): IEEE-oriented graphical reference for voltmeter, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-voltmeter.md)
- [ANSI/IEEE ammeter symbol (A)](https://eloragrid.ai/symbols/ansi-ammeter): IEEE-oriented graphical reference for ammeter, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-ammeter.md)
- [ANSI/IEEE power-factor meter symbol (PF)](https://eloragrid.ai/symbols/ansi-power-factor-meter): IEEE-oriented graphical reference for power-factor meter, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-power-factor-meter.md)
- [ANSI/IEEE frequency meter symbol (Hz)](https://eloragrid.ai/symbols/ansi-frequency-meter): IEEE-oriented graphical reference for frequency meter, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-frequency-meter.md)
- [ANSI/IEEE recording wattmeter symbol (W REC)](https://eloragrid.ai/symbols/ansi-recording-wattmeter): IEEE-oriented graphical reference for recording wattmeter, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-recording-wattmeter.md)
- [ANSI/IEEE reactive-power meter symbol (var)](https://eloragrid.ai/symbols/ansi-reactive-power-meter): IEEE-oriented graphical reference for reactive-power meter, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-reactive-power-meter.md)
- [ANSI/IEEE synchronoscope symbol (SYNC SCOPE)](https://eloragrid.ai/symbols/ansi-synchronoscope): IEEE-oriented graphical reference for synchronoscope, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-synchronoscope.md)
- [ANSI/IEEE running-hours meter symbol (HOURS)](https://eloragrid.ai/symbols/ansi-running-hours-meter): IEEE-oriented graphical reference for running-hours meter, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-running-hours-meter.md)
- [ANSI/IEEE single-phase ac motor symbol (M 1PH AC)](https://eloragrid.ai/symbols/ansi-single-phase-ac-motor): IEEE-oriented graphical reference for single-phase ac motor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-single-phase-ac-motor.md)
- [ANSI/IEEE three-phase ac motor symbol (M 3PH)](https://eloragrid.ai/symbols/ansi-three-phase-ac-motor): IEEE-oriented graphical reference for three-phase ac motor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-three-phase-ac-motor.md)
- [ANSI/IEEE wound-rotor induction motor symbol (M WR)](https://eloragrid.ai/symbols/ansi-wound-rotor-induction-motor): IEEE-oriented graphical reference for wound-rotor induction motor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-wound-rotor-induction-motor.md)
- [ANSI/IEEE dc motor symbol (M DC)](https://eloragrid.ai/symbols/ansi-dc-motor): IEEE-oriented graphical reference for dc motor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-dc-motor.md)
- [ANSI/IEEE permanent-magnet dc motor symbol (M DC PM)](https://eloragrid.ai/symbols/ansi-permanent-magnet-dc-motor): IEEE-oriented graphical reference for permanent-magnet dc motor, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-permanent-magnet-dc-motor.md)
- [ANSI/IEEE three-phase synchronous generator symbol (G 3PH SYNC)](https://eloragrid.ai/symbols/ansi-three-phase-synchronous-generator): IEEE-oriented graphical reference for three-phase synchronous generator, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-three-phase-synchronous-generator.md)
- [ANSI/IEEE dc generator symbol (G DC)](https://eloragrid.ai/symbols/ansi-dc-generator): IEEE-oriented graphical reference for dc generator, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-dc-generator.md)
- [ANSI/IEEE indicator lamp symbol (Lamp)](https://eloragrid.ai/symbols/ansi-indicator-lamp): IEEE-oriented graphical reference for indicator lamp, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-indicator-lamp.md)
- [ANSI/IEEE transformer-fed indicator lamp symbol (LAMP TX)](https://eloragrid.ai/symbols/ansi-transformer-fed-indicator-lamp): IEEE-oriented graphical reference for transformer-fed indicator lamp, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-transformer-fed-indicator-lamp.md)
- [ANSI/IEEE push-to-test indicator lamp symbol (LAMP TEST)](https://eloragrid.ai/symbols/ansi-push-to-test-indicator-lamp): IEEE-oriented graphical reference for push-to-test indicator lamp, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-push-to-test-indicator-lamp.md)
- [ANSI/IEEE led indicator lamp symbol (LAMP LED)](https://eloragrid.ai/symbols/ansi-led-indicator-lamp): IEEE-oriented graphical reference for led indicator lamp, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-led-indicator-lamp.md)
- [ANSI/IEEE on-delay normally-open contact symbol (TON NO)](https://eloragrid.ai/symbols/ansi-on-delay-normally-open-contact): IEEE-oriented graphical reference for on-delay normally-open contact, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-on-delay-normally-open-contact.md)
- [ANSI/IEEE on-delay normally-closed contact symbol (TON NC)](https://eloragrid.ai/symbols/ansi-on-delay-normally-closed-contact): IEEE-oriented graphical reference for on-delay normally-closed contact, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-on-delay-normally-closed-contact.md)
- [ANSI/IEEE off-delay normally-open contact symbol (TOFF NO)](https://eloragrid.ai/symbols/ansi-off-delay-normally-open-contact): IEEE-oriented graphical reference for off-delay normally-open contact, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-off-delay-normally-open-contact.md)
- [ANSI/IEEE off-delay normally-closed contact symbol (TOFF NC)](https://eloragrid.ai/symbols/ansi-off-delay-normally-closed-contact): IEEE-oriented graphical reference for off-delay normally-closed contact, with public vendor evidence and drawing-reading notes. [Markdown](https://eloragrid.ai/library/entries/ansi-off-delay-normally-closed-contact.md)
- [Positive-operation direction qualifier (Q070109)](https://eloragrid.ai/symbols/iec-positive-operation-direction-qualifier): A positive-operation qualifier identifies the documented mechanically imposed operating direction. [Markdown](https://eloragrid.ai/library/entries/iec-positive-operation-direction-qualifier.md)
- [Manual-operation qualifier (Q021301)](https://eloragrid.ai/symbols/iec-manual-operation-qualifier): This qualifier identifies an operator action applied to the associated mechanism. [Markdown](https://eloragrid.ai/library/entries/iec-manual-operation-qualifier.md)
- [Protected-access manual-operation qualifier (Q021302)](https://eloragrid.ai/symbols/iec-protected-access-manual-operation-qualifier): This qualifier indicates that manual access to the operating mechanism is protected or restricted. [Markdown](https://eloragrid.ai/library/entries/iec-protected-access-manual-operation-qualifier.md)
- [Pushbutton-operation qualifier (Q021305)](https://eloragrid.ai/symbols/iec-pushbutton-operation-qualifier): A pushbutton qualifier identifies the actuation method of a contact or device. [Markdown](https://eloragrid.ai/library/entries/iec-pushbutton-operation-qualifier.md)
- [Emergency-operation qualifier (Q021308)](https://eloragrid.ai/symbols/iec-emergency-operation-qualifier): An emergency-operation qualifier marks the documented emergency actuation role. [Markdown](https://eloragrid.ai/library/entries/iec-emergency-operation-qualifier.md)
- [Rotary-operation qualifier (Q021304)](https://eloragrid.ai/symbols/iec-rotary-operation-qualifier): This qualifier identifies an operating mechanism actuated by rotation. [Markdown](https://eloragrid.ai/library/entries/iec-rotary-operation-qualifier.md)
- [Key-operation qualifier (Q021313)](https://eloragrid.ai/symbols/iec-key-operation-qualifier): A key-operation qualifier identifies a mechanism requiring the specified key action. [Markdown](https://eloragrid.ai/library/entries/iec-key-operation-qualifier.md)
- [Foot-operation qualifier (Q021310)](https://eloragrid.ai/symbols/iec-foot-operation-qualifier): This qualifier identifies actuation by a foot-operated mechanism. [Markdown](https://eloragrid.ai/library/entries/iec-foot-operation-qualifier.md)
- [Lever-operation qualifier (Q021311)](https://eloragrid.ai/symbols/iec-lever-operation-qualifier): A lever-operation qualifier identifies a manually moved lever mechanism. [Markdown](https://eloragrid.ai/library/entries/iec-lever-operation-qualifier.md)
- [Crank-operation qualifier (Q021214)](https://eloragrid.ai/symbols/iec-crank-operation-qualifier): This qualifier identifies manual operation through a crank mechanism. [Markdown](https://eloragrid.ai/library/entries/iec-crank-operation-qualifier.md)
- [Handwheel-operation qualifier (Q021309)](https://eloragrid.ai/symbols/iec-handwheel-operation-qualifier): A handwheel qualifier identifies an operating mechanism moved by a wheel. [Markdown](https://eloragrid.ai/library/entries/iec-handwheel-operation-qualifier.md)
- [Liquid-level actuation qualifier (Q021401)](https://eloragrid.ai/symbols/iec-liquid-level-actuation-qualifier): This qualifier identifies actuation responding to liquid level. [Markdown](https://eloragrid.ai/library/entries/iec-liquid-level-actuation-qualifier.md)
- [Event-count actuation qualifier (Q021402)](https://eloragrid.ai/symbols/iec-event-count-actuation-qualifier): This qualifier identifies operation related to a count of events. [Markdown](https://eloragrid.ai/library/entries/iec-event-count-actuation-qualifier.md)
- [Liquid-flow actuation qualifier (Q021403)](https://eloragrid.ai/symbols/iec-liquid-flow-actuation-qualifier): A liquid-flow qualifier identifies the process input operating a device. [Markdown](https://eloragrid.ai/library/entries/iec-liquid-flow-actuation-qualifier.md)
- [Gas-flow actuation qualifier (Q021404)](https://eloragrid.ai/symbols/iec-gas-flow-actuation-qualifier): A gas-flow qualifier identifies operation responding to gas movement. [Markdown](https://eloragrid.ai/library/entries/iec-gas-flow-actuation-qualifier.md)
- [Motor-operation qualifier (Q021326)](https://eloragrid.ai/symbols/iec-motor-operation-qualifier): This qualifier identifies an operating mechanism driven by a motor. [Markdown](https://eloragrid.ai/library/entries/iec-motor-operation-qualifier.md)
- [Timed-operation qualifier (Q021327)](https://eloragrid.ai/symbols/iec-timed-operation-qualifier): A timed-operation qualifier identifies operation influenced by the documented timing function. [Markdown](https://eloragrid.ai/library/entries/iec-timed-operation-qualifier.md)
- [Roller-operation qualifier (Q021315)](https://eloragrid.ai/symbols/iec-roller-operation-qualifier): This qualifier identifies contact with a roller-operated mechanism. [Markdown](https://eloragrid.ai/library/entries/iec-roller-operation-qualifier.md)
- [Cam-operation qualifier (Q021316)](https://eloragrid.ai/symbols/iec-cam-operation-qualifier): This qualifier identifies operation by a cam mechanism. [Markdown](https://eloragrid.ai/library/entries/iec-cam-operation-qualifier.md)
- [Cam-profile indication (Q021317)](https://eloragrid.ai/symbols/iec-cam-profile-indication): A cam-profile indication describes the mechanical profile associated with an operating sequence. [Markdown](https://eloragrid.ai/library/entries/iec-cam-profile-indication.md)
- [Switch-position function qualifier (Q070106)](https://eloragrid.ai/symbols/iec-switch-position-function-qualifier): This qualifier marks the publisher's switch-position function element. [Markdown](https://eloragrid.ai/library/entries/iec-switch-position-function-qualifier.md)
- [Isolation-function qualifier (Q070103)](https://eloragrid.ai/symbols/iec-isolation-function-qualifier): An isolation qualifier identifies the documented disconnector function attached to a switching representation. [Markdown](https://eloragrid.ai/library/entries/iec-isolation-function-qualifier.md)
- [Switch-disconnector function qualifier (Q070104)](https://eloragrid.ai/symbols/iec-switch-disconnector-function-qualifier): This qualifier identifies combined switching and isolation in the associated representation. [Markdown](https://eloragrid.ai/library/entries/iec-switch-disconnector-function-qualifier.md)
- [Circuit-breaker function qualifier (Q070102)](https://eloragrid.ai/symbols/iec-circuit-breaker-function-qualifier): A breaker-function qualifier identifies automatic interruption capability in the compound representation. [Markdown](https://eloragrid.ai/library/entries/iec-circuit-breaker-function-qualifier.md)
- [Power-contactor function qualifier (Q070101)](https://eloragrid.ai/symbols/iec-power-contactor-function-qualifier): This qualifier marks the power-contactor function of the associated switching device. [Markdown](https://eloragrid.ai/library/entries/iec-power-contactor-function-qualifier.md)
- [Automatic-trip qualifier (Q070105)](https://eloragrid.ai/symbols/iec-automatic-trip-qualifier): An automatic-trip qualifier indicates that the associated mechanism can operate automatically under its documented condition. [Markdown](https://eloragrid.ai/library/entries/iec-automatic-trip-qualifier.md)
- [Spring-return qualifier (Q070107)](https://eloragrid.ai/symbols/iec-spring-return-qualifier): A spring-return qualifier indicates return after the specified operating force is removed. [Markdown](https://eloragrid.ai/library/entries/iec-spring-return-qualifier.md)
- [Maintained-position qualifier (Q070108)](https://eloragrid.ai/symbols/iec-maintained-position-qualifier): A maintained-position qualifier indicates that the operating position remains after actuation. [Markdown](https://eloragrid.ai/library/entries/iec-maintained-position-qualifier.md)
- [One-way linear-motion qualifier (Q020401R)](https://eloragrid.ai/symbols/iec-one-way-linear-motion-qualifier): A linear-motion qualifier identifies movement or force in one documented direction. [Markdown](https://eloragrid.ai/library/entries/iec-one-way-linear-motion-qualifier.md)
- [Two-way linear-motion qualifier (Q020402)](https://eloragrid.ai/symbols/iec-two-way-linear-motion-qualifier): This qualifier identifies motion or force in both directions along a linear path. [Markdown](https://eloragrid.ai/library/entries/iec-two-way-linear-motion-qualifier.md)
- [Transition indication (Q101101)](https://eloragrid.ai/symbols/iec-transition-indication): A transition indication identifies a documented change between positions or states. [Markdown](https://eloragrid.ai/library/entries/iec-transition-indication.md)
- [One-way rotary-motion qualifier (Q020403)](https://eloragrid.ai/symbols/iec-one-way-rotary-motion-qualifier): A rotary-motion qualifier identifies movement or torque in one direction of rotation. [Markdown](https://eloragrid.ai/library/entries/iec-one-way-rotary-motion-qualifier.md)
- [Two-way rotary-motion qualifier (Q020404)](https://eloragrid.ai/symbols/iec-two-way-rotary-motion-qualifier): This qualifier identifies a mechanism capable of rotary movement in either direction. [Markdown](https://eloragrid.ai/library/entries/iec-two-way-rotary-motion-qualifier.md)
- [Limited two-way rotary-motion qualifier (Q020405)](https://eloragrid.ai/symbols/iec-limited-two-way-rotary-motion-qualifier): This qualifier identifies rotary movement in both directions over a limited travel. [Markdown](https://eloragrid.ai/library/entries/iec-limited-two-way-rotary-motion-qualifier.md)
- [Unidirectional propagation qualifier (Q020501)](https://eloragrid.ai/symbols/iec-unidirectional-propagation-qualifier): This qualifier indicates a signal or propagation path with one documented direction. [Markdown](https://eloragrid.ai/library/entries/iec-unidirectional-propagation-qualifier.md)
- [Simultaneous bidirectional propagation qualifier (Q020502)](https://eloragrid.ai/symbols/iec-simultaneous-bidirectional-propagation-qualifier): This qualifier distinguishes a path supporting propagation in both directions at the same time. [Markdown](https://eloragrid.ai/library/entries/iec-simultaneous-bidirectional-propagation-qualifier.md)
- [Alternating bidirectional propagation qualifier (Q020503)](https://eloragrid.ai/symbols/iec-alternating-bidirectional-propagation-qualifier): This qualifier identifies opposite-direction propagation occurring alternately. [Markdown](https://eloragrid.ai/library/entries/iec-alternating-bidirectional-propagation-qualifier.md)
- [Signal-transmission qualifier (Q020504)](https://eloragrid.ai/symbols/iec-signal-transmission-qualifier): A transmission qualifier identifies the sending role of a signal interface. [Markdown](https://eloragrid.ai/library/entries/iec-signal-transmission-qualifier.md)
- [Signal-reception qualifier (Q020505)](https://eloragrid.ai/symbols/iec-signal-reception-qualifier): A reception qualifier identifies the receiving role of a signal interface. [Markdown](https://eloragrid.ai/library/entries/iec-signal-reception-qualifier.md)
- [Outbound-energy-flow qualifier (Q020506)](https://eloragrid.ai/symbols/iec-outbound-energy-flow-qualifier): An outbound-energy qualifier identifies energy leaving the represented device or boundary. [Markdown](https://eloragrid.ai/library/entries/iec-outbound-energy-flow-qualifier.md)
- [Inbound-energy-flow qualifier (Q020507)](https://eloragrid.ai/symbols/iec-inbound-energy-flow-qualifier): An inbound-energy qualifier identifies energy entering a represented device or system. [Markdown](https://eloragrid.ai/library/entries/iec-inbound-energy-flow-qualifier.md)
- [Bidirectional-energy-flow qualifier (Q020508)](https://eloragrid.ai/symbols/iec-bidirectional-energy-flow-qualifier): This qualifier identifies an energy interface intended to operate in both directions. [Markdown](https://eloragrid.ai/library/entries/iec-bidirectional-energy-flow-qualifier.md)
- [Thermal-effect qualifier (Q020801)](https://eloragrid.ai/symbols/iec-thermal-effect-qualifier): A thermal-effect qualifier identifies a function responding to or producing heat-related behaviour. [Markdown](https://eloragrid.ai/library/entries/iec-thermal-effect-qualifier.md)
- [Magnetic-effect qualifier (Q020802)](https://eloragrid.ai/symbols/iec-magnetic-effect-qualifier): This qualifier identifies a function involving a magnetic effect. [Markdown](https://eloragrid.ai/library/entries/iec-magnetic-effect-qualifier.md)
- [Magnetostrictive-effect qualifier (Q020803)](https://eloragrid.ai/symbols/iec-magnetostrictive-effect-qualifier): A magnetostrictive qualifier identifies a function using the relationship between magnetisation and mechanical deformation. [Markdown](https://eloragrid.ai/library/entries/iec-magnetostrictive-effect-qualifier.md)
- [Magnetic-field-effect qualifier (Q020804)](https://eloragrid.ai/symbols/iec-magnetic-field-effect-qualifier): This qualifier identifies response to a magnetic field in the represented function. [Markdown](https://eloragrid.ai/library/entries/iec-magnetic-field-effect-qualifier.md)
- [Non-ionising radiation qualifier (Q020901)](https://eloragrid.ai/symbols/iec-non-ionising-radiation-qualifier): This qualifier identifies the publisher's non-ionising radiation family, with the radiation role stated in the device description. [Markdown](https://eloragrid.ai/library/entries/iec-non-ionising-radiation-qualifier.md)
- [Ionising-radiation qualifier (Q020903)](https://eloragrid.ai/symbols/iec-ionising-radiation-qualifier): An ionising-radiation qualifier identifies the radiation role attached to a measuring or operating function. [Markdown](https://eloragrid.ai/library/entries/iec-ionising-radiation-qualifier.md)
- [Presumed-fault-location indication (Q021701)](https://eloragrid.ai/symbols/iec-presumed-fault-location-indication): This indication marks the presumed location of a fault or failure in a diagnostic diagram. [Markdown](https://eloragrid.ai/library/entries/iec-presumed-fault-location-indication.md)
- [Insulation-failure indication (Q021702)](https://eloragrid.ai/symbols/iec-insulation-failure-indication): An insulation-failure indication identifies the documented insulation-related failure condition. [Markdown](https://eloragrid.ai/library/entries/iec-insulation-failure-indication.md)
- [Two-phase winding connection (Q060201)](https://eloragrid.ai/symbols/iec-two-phase-winding-connection): This connection qualifier identifies a two-phase winding arrangement in the publisher's reference family. [Markdown](https://eloragrid.ai/library/entries/iec-two-phase-winding-connection.md)
- [Partial-V winding connection (Q060202)](https://eloragrid.ai/symbols/iec-partial-v-winding-connection): This qualifier identifies the publisher's partial-V three-phase winding form. [Markdown](https://eloragrid.ai/library/entries/iec-partial-v-winding-connection.md)
- [Four-phase winding with accessible connection (Q060203)](https://eloragrid.ai/symbols/iec-four-phase-winding-with-accessible-connection): This qualifier identifies a four-phase winding form with an accessible connection described by the publisher as accessible ground. [Markdown](https://eloragrid.ai/library/entries/iec-four-phase-winding-with-accessible-connection.md)
- [Three-phase T winding connection (Q060204)](https://eloragrid.ai/symbols/iec-three-phase-t-winding-connection): A T winding qualifier identifies the publisher's three-phase T connection form. [Markdown](https://eloragrid.ai/library/entries/iec-three-phase-t-winding-connection.md)
- [Six-phase double-delta winding connection (Q060210)](https://eloragrid.ai/symbols/iec-six-phase-double-delta-winding-connection): This qualifier identifies a six-phase winding arrangement using the publisher's double-delta form. [Markdown](https://eloragrid.ai/library/entries/iec-six-phase-double-delta-winding-connection.md)
- [Six-phase polygon winding connection (Q060211)](https://eloragrid.ai/symbols/iec-six-phase-polygon-winding-connection): A polygon winding qualifier identifies the publisher's six-phase polygon connection. [Markdown](https://eloragrid.ai/library/entries/iec-six-phase-polygon-winding-connection.md)
- [Six-phase star winding connection (Q060212)](https://eloragrid.ai/symbols/iec-six-phase-star-winding-connection): This qualifier identifies a six-phase winding connected at a common star point. [Markdown](https://eloragrid.ai/library/entries/iec-six-phase-star-winding-connection.md)
- [Six-phase double-zigzag winding connection (Q060213)](https://eloragrid.ai/symbols/iec-six-phase-double-zigzag-winding-connection): This qualifier identifies the publisher's six-phase double-zigzag form with an accessible connection. [Markdown](https://eloragrid.ai/library/entries/iec-six-phase-double-zigzag-winding-connection.md)
- [Direct-current supply qualifier (Q020201)](https://eloragrid.ai/symbols/iec-direct-current-supply-qualifier): A direct-current qualifier identifies the supply character associated with a circuit or device. [Markdown](https://eloragrid.ai/library/entries/iec-direct-current-supply-qualifier.md)
- [Alternating-current supply qualifier (Q020204)](https://eloragrid.ai/symbols/iec-alternating-current-supply-qualifier): An alternating-current qualifier identifies the supply character of a represented circuit. [Markdown](https://eloragrid.ai/library/entries/iec-alternating-current-supply-qualifier.md)
- [Rectified-current with AC component qualifier (Q020212)](https://eloragrid.ai/symbols/iec-rectified-current-with-ac-component-qualifier): This qualifier distinguishes rectified current with a remaining alternating component. [Markdown](https://eloragrid.ai/library/entries/iec-rectified-current-with-ac-component-qualifier.md)
- [Automatic mechanical-return indication (Q021207)](https://eloragrid.ai/symbols/iec-automatic-mechanical-return-indication): This indication identifies the automatic return behaviour of a mechanical control relationship. [Markdown](https://eloragrid.ai/library/entries/iec-automatic-mechanical-return-indication.md)
- [Mechanical stop-latch indication (Q021208)](https://eloragrid.ai/symbols/iec-mechanical-stop-latch-indication): A stop-latch indication identifies a mechanically retained control position. [Markdown](https://eloragrid.ai/library/entries/iec-mechanical-stop-latch-indication.md)
- [Mechanical stop latch in neutral state (Q021209)](https://eloragrid.ai/symbols/iec-mechanical-stop-latch-in-neutral-state): This form identifies the neutral state of the represented stop-latch mechanism. [Markdown](https://eloragrid.ai/library/entries/iec-mechanical-stop-latch-in-neutral-state.md)
- [Mechanical stop latch in engaged state (Q021210)](https://eloragrid.ai/symbols/iec-mechanical-stop-latch-in-engaged-state): This form identifies an engaged stop-latch mechanism. [Markdown](https://eloragrid.ai/library/entries/iec-mechanical-stop-latch-in-engaged-state.md)
- [Mechanical interlock between devices (Q021211)](https://eloragrid.ai/symbols/iec-mechanical-interlock-between-devices): A mechanical interlock indication links devices whose movements are constrained by a physical relationship. [Markdown](https://eloragrid.ai/library/entries/iec-mechanical-interlock-between-devices.md)
- [Two-way latching device (Q1020603)](https://eloragrid.ai/symbols/iec-two-way-latching-device): This form identifies the publisher's two-way latching-device arrangement. [Markdown](https://eloragrid.ai/library/entries/iec-two-way-latching-device.md)
- [Manually released latching device (Q1020604)](https://eloragrid.ai/symbols/iec-manually-released-latching-device): This qualifier identifies release of a latching mechanism by manual action. [Markdown](https://eloragrid.ai/library/entries/iec-manually-released-latching-device.md)
- [Key-controlled two-way latching device (Q1029603)](https://eloragrid.ai/symbols/iec-key-controlled-two-way-latching-device): This form identifies a two-way latch using a documented key operation. [Markdown](https://eloragrid.ai/library/entries/iec-key-controlled-two-way-latching-device.md)
- [Mechanical clutch connection (Q021216)](https://eloragrid.ai/symbols/iec-mechanical-clutch-connection): A clutch qualifier identifies a selectively coupled mechanical relationship. [Markdown](https://eloragrid.ai/library/entries/iec-mechanical-clutch-connection.md)
- [Disconnected mechanical coupling (Q021217)](https://eloragrid.ai/symbols/iec-disconnected-mechanical-coupling): This indication identifies the disconnected state of a mechanical coupling. [Markdown](https://eloragrid.ai/library/entries/iec-disconnected-mechanical-coupling.md)
- [Engaged mechanical coupling (Q021218)](https://eloragrid.ai/symbols/iec-engaged-mechanical-coupling): This indication identifies engagement between the represented mechanical elements. [Markdown](https://eloragrid.ai/library/entries/iec-engaged-mechanical-coupling.md)
- [Mechanical gear connection (Q021223)](https://eloragrid.ai/symbols/iec-mechanical-gear-connection): A gear-connection indication identifies transmission through a gearing relationship. [Markdown](https://eloragrid.ai/library/entries/iec-mechanical-gear-connection.md)
- [Thermocouple with terminal board (HTC1LTB)](https://eloragrid.ai/symbols/iec-thermocouple-with-terminal-board): This representation distinguishes a thermocouple circuit expanded to show its terminal-board interface. [Markdown](https://eloragrid.ai/library/entries/iec-thermocouple-with-terminal-board.md)
- [Pyrometer indication (HIN1P25)](https://eloragrid.ai/symbols/iec-pyrometer-indication): A pyrometer indication identifies the documented temperature-measurement display function. [Markdown](https://eloragrid.ai/library/entries/iec-pyrometer-indication.md)
- [Clock indication (HIN1P29)](https://eloragrid.ai/symbols/iec-clock-indication): A clock indication identifies a time display or clock function in the circuit documentation. [Markdown](https://eloragrid.ai/library/entries/iec-clock-indication.md)
- [Minute-pulse clock contact (HIN1P33)](https://eloragrid.ai/symbols/iec-minute-pulse-clock-contact): This representation identifies the publisher's normally-open clock contact that closes every minute. [Markdown](https://eloragrid.ai/library/entries/iec-minute-pulse-clock-contact.md)
- [Pressure-to-current converter (HIN1B10)](https://eloragrid.ai/symbols/iec-pressure-to-current-converter): This representation identifies conversion of a pressure input to a current-signal output. [Markdown](https://eloragrid.ai/library/entries/iec-pressure-to-current-converter.md)
- [Single-phase AC-to-DC current converter (HIN1G1)](https://eloragrid.ai/symbols/iec-single-phase-ac-to-dc-current-converter): This representation identifies the publisher's single-phase AC/DC current-conversion function. [Markdown](https://eloragrid.ai/library/entries/iec-single-phase-ac-to-dc-current-converter.md)
- [Tachometric dynamo (HIN1B11)](https://eloragrid.ai/symbols/iec-tachometric-dynamo): A tachometric dynamo indication identifies a speed-related generating measurement function. [Markdown](https://eloragrid.ai/library/entries/iec-tachometric-dynamo.md)
- [Impulse tachometric transducer (HIN1B12)](https://eloragrid.ai/symbols/iec-impulse-tachometric-transducer): This representation distinguishes an impulse-output speed-measurement function. [Markdown](https://eloragrid.ai/library/entries/iec-impulse-tachometric-transducer.md)
- [Optical tachometric transducer (HIN1B13)](https://eloragrid.ai/symbols/iec-optical-tachometric-transducer): This representation identifies optical speed-sensing in the publisher's tachometric family. [Markdown](https://eloragrid.ai/library/entries/iec-optical-tachometric-transducer.md)
- [Audible bell (HAN1B)](https://eloragrid.ai/symbols/iec-audible-bell): A bell indication identifies an audible annunciation output in a control circuit. [Markdown](https://eloragrid.ai/library/entries/iec-audible-bell.md)
- [Audible buzzer (HAN1Z)](https://eloragrid.ai/symbols/iec-audible-buzzer): A buzzer indication identifies the specified audible signalling output. [Markdown](https://eloragrid.ai/library/entries/iec-audible-buzzer.md)
- [Audible siren (HAN1S)](https://eloragrid.ai/symbols/iec-audible-siren): A siren indication identifies an audible alarm output with the documented operating role. [Markdown](https://eloragrid.ai/library/entries/iec-audible-siren.md)
- [Loudspeaker annunciation (HAN1B7)](https://eloragrid.ai/symbols/iec-loudspeaker-annunciation): A loudspeaker indication identifies conversion of an electrical signal to an audible output. [Markdown](https://eloragrid.ai/library/entries/iec-loudspeaker-annunciation.md)
- [Combined loudspeaker and microphone (HAN1B8)](https://eloragrid.ai/symbols/iec-combined-loudspeaker-and-microphone): This representation identifies an electroacoustic device serving loudspeaker and microphone roles. [Markdown](https://eloragrid.ai/library/entries/iec-combined-loudspeaker-and-microphone.md)
- [Microphone input (HAN1B9)](https://eloragrid.ai/symbols/iec-microphone-input): A microphone indication identifies an acoustic-input transducer in a communications circuit. [Markdown](https://eloragrid.ai/library/entries/iec-microphone-input.md)
- [Solenoid valve actuator (HSV1)](https://eloragrid.ai/symbols/iec-solenoid-valve-actuator): This representation identifies the electrical actuator associated with a solenoid-operated valve. [Markdown](https://eloragrid.ai/library/entries/iec-solenoid-valve-actuator.md)
- [Solenoid closing function for an open valve (HSV1Y1)](https://eloragrid.ai/symbols/iec-solenoid-closing-function-for-an-open-valve): This representation identifies the publisher's open-valve closing function associated with solenoid operation. [Markdown](https://eloragrid.ai/library/entries/iec-solenoid-closing-function-for-an-open-valve.md)
- [Electromagnetic brake actuator (HSV1Y4)](https://eloragrid.ai/symbols/iec-electromagnetic-brake-actuator): This representation identifies an electromagnetic brake actuated through its documented electrical circuit. [Markdown](https://eloragrid.ai/library/entries/iec-electromagnetic-brake-actuator.md)
- [Solenoid-valve NO auxiliary contact (HSV21)](https://eloragrid.ai/symbols/iec-solenoid-valve-no-auxiliary-contact): This form identifies a normally-open auxiliary contact associated with a solenoid valve. [Markdown](https://eloragrid.ai/library/entries/iec-solenoid-valve-no-auxiliary-contact.md)
- [Solenoid-valve NC auxiliary contact (HSV22)](https://eloragrid.ai/symbols/iec-solenoid-valve-nc-auxiliary-contact): This form identifies a normally-closed auxiliary contact associated with a solenoid valve. [Markdown](https://eloragrid.ai/library/entries/iec-solenoid-valve-nc-auxiliary-contact.md)
- [Ultrasonic proximity switch (HPX1U)](https://eloragrid.ai/symbols/iec-ultrasonic-proximity-switch): An ultrasonic-switch representation identifies presence or distance switching using an ultrasonic sensing principle. [Markdown](https://eloragrid.ai/library/entries/iec-ultrasonic-proximity-switch.md)
- [Ultrasonic NO switching output (HPX11U)](https://eloragrid.ai/symbols/iec-ultrasonic-no-switching-output): This form identifies a normally-open switching output in the ultrasonic sensor family. [Markdown](https://eloragrid.ai/library/entries/iec-ultrasonic-no-switching-output.md)
- [Ultrasonic NC switching output (HPX12U)](https://eloragrid.ai/symbols/iec-ultrasonic-nc-switching-output): This form identifies a normally-closed switching output in the ultrasonic sensor family. [Markdown](https://eloragrid.ai/library/entries/iec-ultrasonic-nc-switching-output.md)
- [Three-wire ultrasonic sensor (HPX11U3)](https://eloragrid.ai/symbols/iec-three-wire-ultrasonic-sensor): This representation distinguishes a three-wire ultrasonic sensor interface from a simple contact depiction. [Markdown](https://eloragrid.ai/library/entries/iec-three-wire-ultrasonic-sensor.md)
- [Touch-sensitive switch (HPX1TS)](https://eloragrid.ai/symbols/iec-touch-sensitive-switch): A touch-switch representation identifies operation by the documented touch-sensing mechanism. [Markdown](https://eloragrid.ai/library/entries/iec-touch-sensitive-switch.md)
- [Touch-switch NO output (HPX11TS)](https://eloragrid.ai/symbols/iec-touch-switch-no-output): This form identifies a normally-open touch-switch output. [Markdown](https://eloragrid.ai/library/entries/iec-touch-switch-no-output.md)
- [Touch-switch NC output (HPX12TS)](https://eloragrid.ai/symbols/iec-touch-switch-nc-output): This form identifies a normally-closed touch-switch output. [Markdown](https://eloragrid.ai/library/entries/iec-touch-switch-nc-output.md)
- [Three-wire touch-sensitive switch (HPX11TS3)](https://eloragrid.ai/symbols/iec-three-wire-touch-sensitive-switch): This representation distinguishes a separately supplied three-wire touch-switch interface. [Markdown](https://eloragrid.ai/library/entries/iec-three-wire-touch-sensitive-switch.md)
- [Phase-to-phase voltmeter selector (HSW1S90)](https://eloragrid.ai/symbols/iec-phase-to-phase-voltmeter-selector): This representation identifies selection among phase-to-phase voltage measurement connections. [Markdown](https://eloragrid.ai/library/entries/iec-phase-to-phase-voltmeter-selector.md)
- [Phase-to-neutral voltmeter selector (HSW1S91)](https://eloragrid.ai/symbols/iec-phase-to-neutral-voltmeter-selector): This representation identifies selection among phase-to-neutral voltage measurement connections. [Markdown](https://eloragrid.ai/library/entries/iec-phase-to-neutral-voltmeter-selector.md)
- [Combined line and phase voltmeter selector (HSW1S92)](https://eloragrid.ai/symbols/iec-combined-line-and-phase-voltmeter-selector): This representation identifies a selector covering phase-to-phase and phase-to-neutral voltage measurements. [Markdown](https://eloragrid.ai/library/entries/iec-combined-line-and-phase-voltmeter-selector.md)
- [Two-network voltage measurement selector (HSW1S93)](https://eloragrid.ai/symbols/iec-two-network-voltage-measurement-selector): This representation distinguishes voltage selection between two three-phase networks. [Markdown](https://eloragrid.ai/library/entries/iec-two-network-voltage-measurement-selector.md)
- [Three-point current measurement selector (HSW1S94)](https://eloragrid.ai/symbols/iec-three-point-current-measurement-selector): This representation identifies selection among three current-measurement points. [Markdown](https://eloragrid.ai/library/entries/iec-three-point-current-measurement-selector.md)
- [Four-point current measurement selector (HSW1S95)](https://eloragrid.ai/symbols/iec-four-point-current-measurement-selector): This representation identifies selection among four current-measurement points. [Markdown](https://eloragrid.ai/library/entries/iec-four-point-current-measurement-selector.md)
- [Latched pull-cord switch (HPC11L)](https://eloragrid.ai/symbols/iec-latched-pull-cord-switch): This representation distinguishes a pull-cord actuator whose operated state is latched. [Markdown](https://eloragrid.ai/library/entries/iec-latched-pull-cord-switch.md)
- [Latched foot-operated switch (HFT11L)](https://eloragrid.ai/symbols/iec-latched-foot-operated-switch): This representation distinguishes a foot actuator with a retained operated state. [Markdown](https://eloragrid.ai/library/entries/iec-latched-foot-operated-switch.md)
- [Latched lever-operated switch (HPB11LSL)](https://eloragrid.ai/symbols/iec-latched-lever-operated-switch): This representation distinguishes a lever actuator with a maintained or latched operated state. [Markdown](https://eloragrid.ai/library/entries/iec-latched-lever-operated-switch.md)
- [Three-phase motor with four connections (HMO14)](https://eloragrid.ai/symbols/iec-three-phase-motor-with-four-connections): This representation distinguishes the publisher's three-phase motor form with four indicated connections. [Markdown](https://eloragrid.ai/library/entries/iec-three-phase-motor-with-four-connections.md)
- [Three-phase induction motor with series excitation (HMO1M3)](https://eloragrid.ai/symbols/iec-three-phase-induction-motor-with-series-excitation): This representation identifies the publisher's asynchronous motor form with series excitation. [Markdown](https://eloragrid.ai/library/entries/iec-three-phase-induction-motor-with-series-excitation.md)
- [Star-stator wound-rotor motor with rotor starter (HMO1M5)](https://eloragrid.ai/symbols/iec-star-stator-wound-rotor-motor-with-rotor-starter): This representation distinguishes star-connected stator and a starter arrangement associated with the rotor circuit. [Markdown](https://eloragrid.ai/library/entries/iec-star-stator-wound-rotor-motor-with-rotor-starter.md)
- [Six-pole asynchronous motor (HMO1M11)](https://eloragrid.ai/symbols/iec-six-pole-asynchronous-motor): This form identifies the publisher's six-pole asynchronous motor representation. [Markdown](https://eloragrid.ai/library/entries/iec-six-pole-asynchronous-motor.md)
- [Single-phase series-connected AC motor (HMO1M10)](https://eloragrid.ai/symbols/iec-single-phase-series-connected-ac-motor): This representation distinguishes the publisher's single-phase AC motor with series connection. [Markdown](https://eloragrid.ai/library/entries/iec-single-phase-series-connected-ac-motor.md)
- [Single-phase synchronous motor (HMO1M16)](https://eloragrid.ai/symbols/iec-single-phase-synchronous-motor): This representation identifies a single-phase synchronous machine function. [Markdown](https://eloragrid.ai/library/entries/iec-single-phase-synchronous-motor.md)
- [Permanent-magnet linear DC motor (HMO1M14)](https://eloragrid.ai/symbols/iec-permanent-magnet-linear-dc-motor): This representation identifies linear motion produced by a permanent-magnet DC machine. [Markdown](https://eloragrid.ai/library/entries/iec-permanent-magnet-linear-dc-motor.md)
- [Permanent-magnet stepping motor (HMO1M15)](https://eloragrid.ai/symbols/iec-permanent-magnet-stepping-motor): This representation identifies a permanent-magnet stepping-motor function. [Markdown](https://eloragrid.ai/library/entries/iec-permanent-magnet-stepping-motor.md)
- [Shunt-excited DC motor (HMO1M8)](https://eloragrid.ai/symbols/iec-shunt-excited-dc-motor): This representation distinguishes the publisher's derived or shunt-excitation DC motor form. [Markdown](https://eloragrid.ai/library/entries/iec-shunt-excited-dc-motor.md)
- [Resistor with disconnecting slider (HVR1R5)](https://eloragrid.ai/symbols/iec-resistor-with-disconnecting-slider): This form distinguishes a movable resistor contact with a disconnecting position. [Markdown](https://eloragrid.ai/library/entries/iec-resistor-with-disconnecting-slider.md)
- [Carbon-disc variable resistor (HVR1R8)](https://eloragrid.ai/symbols/iec-carbon-disc-variable-resistor): This representation identifies the publisher's carbon-disc variable-resistance form. [Markdown](https://eloragrid.ai/library/entries/iec-carbon-disc-variable-resistor.md)
- [Magnetoresistive element (HVR1S00689)](https://eloragrid.ai/symbols/iec-magnetoresistive-element): This representation identifies a resistive element whose response is associated with a magnetic field. [Markdown](https://eloragrid.ai/library/entries/iec-magnetoresistive-element.md)
- [Differential capacitor (HCA1_S00573)](https://eloragrid.ai/symbols/iec-differential-capacitor): This representation distinguishes a differential capacitive arrangement with related variable capacitances. [Markdown](https://eloragrid.ai/library/entries/iec-differential-capacitor.md)
- [Preset-adjustable capacitor (HCA1_S00575)](https://eloragrid.ai/symbols/iec-preset-adjustable-capacitor): This form distinguishes a capacitor with a preset or trim adjustment. [Markdown](https://eloragrid.ai/library/entries/iec-preset-adjustable-capacitor.md)
- [Split adjustable capacitor (HCA1_S00579)](https://eloragrid.ai/symbols/iec-split-adjustable-capacitor): This representation distinguishes the publisher's split and adjustable capacitor form. [Markdown](https://eloragrid.ai/library/entries/iec-split-adjustable-capacitor.md)
- [Cable identification marker (HW01)](https://eloragrid.ai/symbols/iec-cable-identification-marker): A cable marker identifies a cable association within a schematic conductor group. [Markdown](https://eloragrid.ai/library/entries/iec-cable-identification-marker.md)
- [Additional cable-core marker (HW02)](https://eloragrid.ai/symbols/iec-additional-cable-core-marker): An additional-core marker associates another conductor with an existing cable record. [Markdown](https://eloragrid.ai/library/entries/iec-additional-cable-core-marker.md)
- [Twisted-pair indication (HT0_TW)](https://eloragrid.ai/symbols/iec-twisted-pair-indication): A twisted-pair indication identifies the documented association of two conductors as a twisted pair. [Markdown](https://eloragrid.ai/library/entries/iec-twisted-pair-indication.md)
- [Single power receptacle (HCN1RSGL)](https://eloragrid.ai/symbols/iec-single-power-receptacle): This form identifies a single power receptacle connection in the publisher's installation family. [Markdown](https://eloragrid.ai/library/entries/iec-single-power-receptacle.md)
- [Duplex power receptacle (HCN1RDUP)](https://eloragrid.ai/symbols/iec-duplex-power-receptacle): This form distinguishes a duplex receptacle arrangement. [Markdown](https://eloragrid.ai/library/entries/iec-duplex-power-receptacle.md)
- [Generic device boundary (HDV1T6)](https://eloragrid.ai/symbols/iec-generic-device-boundary): A generic device boundary groups the terminals belonging to one documented component or function. [Markdown](https://eloragrid.ai/library/entries/iec-generic-device-boundary.md)
- [Standalone source cross-reference (HA2S1_REF)](https://eloragrid.ai/symbols/iec-standalone-source-cross-reference): A source cross-reference identifies the originating side of a diagram continuation relationship. [Markdown](https://eloragrid.ai/library/entries/iec-standalone-source-cross-reference.md)
- [Standalone destination cross-reference (HA2D1_REF)](https://eloragrid.ai/symbols/iec-standalone-destination-cross-reference): A destination cross-reference identifies the receiving side of a diagram continuation relationship. [Markdown](https://eloragrid.ai/library/entries/iec-standalone-destination-cross-reference.md)
- [Reference-only wire arrow (HA1X1)](https://eloragrid.ai/symbols/iec-reference-only-wire-arrow): A reference-only arrow directs the reader to an associated wire continuation or annotation. [Markdown](https://eloragrid.ai/library/entries/iec-reference-only-wire-arrow.md)
- [One-line connector representation (HC01PJ_1-)](https://eloragrid.ai/symbols/iec-one-line-connector-representation): A one-line connector representation identifies a connector interface in a simplified circuit view. [Markdown](https://eloragrid.ai/library/entries/iec-one-line-connector-representation.md)
- [One-line terminal representation (HT0001_1-)](https://eloragrid.ai/symbols/iec-one-line-terminal-representation): A one-line terminal identifies a termination point in a simplified circuit view. [Markdown](https://eloragrid.ai/library/entries/iec-one-line-terminal-representation.md)
- [One-line cable identification (HW01_1-)](https://eloragrid.ai/symbols/iec-one-line-cable-identification): A one-line cable marker identifies the cable represented by a simplified connection line. [Markdown](https://eloragrid.ai/library/entries/iec-one-line-cable-identification.md)
- [One-line bus tap (HDV1_BT_1-)](https://eloragrid.ai/symbols/iec-one-line-bus-tap): A bus-tap representation identifies a branch from a bus in a simplified power circuit. [Markdown](https://eloragrid.ai/library/entries/iec-one-line-bus-tap.md)
- [One-line power receptacle (HC01WR_1-)](https://eloragrid.ai/symbols/iec-one-line-power-receptacle): A one-line receptacle represents a power outlet within a simplified circuit view. [Markdown](https://eloragrid.ai/library/entries/iec-one-line-power-receptacle.md)
- [Connector retaining wire identity (HC01PJ)](https://eloragrid.ai/symbols/iec-connector-retaining-wire-identity): This form identifies a separable connector whose publisher representation preserves wire-number identity across the interface. [Markdown](https://eloragrid.ai/library/entries/iec-connector-retaining-wire-identity.md)
- [Connector changing wire identity (HCN1PJ)](https://eloragrid.ai/symbols/iec-connector-changing-wire-identity): This form identifies a connector representation that allows wire-number identities to change across the interface. [Markdown](https://eloragrid.ai/library/entries/iec-connector-changing-wire-identity.md)
- [Terminal carrying wire identification (HT0W02)](https://eloragrid.ai/symbols/iec-terminal-carrying-wire-identification): This terminal representation carries the associated wire identifier at the connection point. [Markdown](https://eloragrid.ai/library/entries/iec-terminal-carrying-wire-identification.md)
- [Terminal with wire-number transition (HT1002)](https://eloragrid.ai/symbols/iec-terminal-with-wire-number-transition): This representation identifies a terminal across which the publisher permits a wire-number change. [Markdown](https://eloragrid.ai/library/entries/iec-terminal-with-wire-number-transition.md)
- [Conductor connection junction (JUNCTION)](https://eloragrid.ai/symbols/iec-conductor-connection-junction): A junction indication marks a documented electrical connection between conductor branches. [Markdown](https://eloragrid.ai/library/entries/iec-conductor-connection-junction.md)
- [Unconnected conductor crossing (CROSSING)](https://eloragrid.ai/symbols/iec-unconnected-conductor-crossing): An unconnected crossing shows conductors passing across each other in the drawing without an electrical junction. [Markdown](https://eloragrid.ai/library/entries/iec-unconnected-conductor-crossing.md)
- [Three-phase conductor group (3~)](https://eloragrid.ai/symbols/iec-three-phase-conductor-group): A conductor group represents the documented phase conductors of a circuit shown individually. [Markdown](https://eloragrid.ai/library/entries/iec-three-phase-conductor-group.md)
- [Dy5 transformer connection reference (Dy5)](https://eloragrid.ai/symbols/iec-dy5-transformer-connection-reference): This reference identifies the publisher's Dy5 transformer connection form with delta/star winding topology. [Markdown](https://eloragrid.ai/library/entries/iec-dy5-transformer-connection-reference.md)
- [Dd6 transformer connection reference (Dd6)](https://eloragrid.ai/symbols/iec-dd6-transformer-connection-reference): This reference identifies the publisher's Dd6 transformer connection form with delta/delta winding topology. [Markdown](https://eloragrid.ai/library/entries/iec-dd6-transformer-connection-reference.md)
- [Yd5 transformer connection reference (Yd5)](https://eloragrid.ai/symbols/iec-yd5-transformer-connection-reference): This reference identifies the publisher's Yd5 transformer connection form with star/delta winding topology. [Markdown](https://eloragrid.ai/library/entries/iec-yd5-transformer-connection-reference.md)
- [Yy6 transformer connection reference (Yy6)](https://eloragrid.ai/symbols/iec-yy6-transformer-connection-reference): This reference identifies the publisher's Yy6 transformer connection form with star/star winding topology. [Markdown](https://eloragrid.ai/library/entries/iec-yy6-transformer-connection-reference.md)
- [Yd11 transformer connection reference (Yd11)](https://eloragrid.ai/symbols/iec-yd11-transformer-connection-reference): This reference identifies the publisher's Yd11 transformer connection form with star/delta winding topology. [Markdown](https://eloragrid.ai/library/entries/iec-yd11-transformer-connection-reference.md)
- [Dy11 transformer connection reference (Dy11)](https://eloragrid.ai/symbols/iec-dy11-transformer-connection-reference): This reference identifies the publisher's Dy11 transformer connection form with delta/star winding topology. [Markdown](https://eloragrid.ai/library/entries/iec-dy11-transformer-connection-reference.md)
- [Dz0 transformer connection reference (Dz0)](https://eloragrid.ai/symbols/iec-dz0-transformer-connection-reference): This reference identifies the publisher's Dz0 transformer connection form with delta/zigzag winding topology. [Markdown](https://eloragrid.ai/library/entries/iec-dz0-transformer-connection-reference.md)
- [Yz5 transformer connection reference (Yz5)](https://eloragrid.ai/symbols/iec-yz5-transformer-connection-reference): This reference identifies the publisher's Yz5 transformer connection form with star/zigzag winding topology. [Markdown](https://eloragrid.ai/library/entries/iec-yz5-transformer-connection-reference.md)
- [Dz6 transformer connection reference (Dz6)](https://eloragrid.ai/symbols/iec-dz6-transformer-connection-reference): This reference identifies the publisher's Dz6 transformer connection form with delta/zigzag winding topology. [Markdown](https://eloragrid.ai/library/entries/iec-dz6-transformer-connection-reference.md)
- [Yz11 transformer connection reference (Yz11)](https://eloragrid.ai/symbols/iec-yz11-transformer-connection-reference): This reference identifies the publisher's Yz11 transformer connection form with star/zigzag winding topology. [Markdown](https://eloragrid.ai/library/entries/iec-yz11-transformer-connection-reference.md)
- [Schottky diode (SBD)](https://eloragrid.ai/symbols/schottky-diode): A metal-semiconductor diode used for rectification or clamping with device-specific forward and reverse characteristics. [Markdown](https://eloragrid.ai/library/entries/schottky-diode.md)
- [Unidirectional TVS diode (TVS)](https://eloragrid.ai/symbols/unidirectional-tvs-diode): A transient-suppression diode intended to clamp a documented surge polarity across a protected circuit. [Markdown](https://eloragrid.ai/library/entries/unidirectional-tvs-diode.md)
- [Light-emitting diode (LED)](https://eloragrid.ai/symbols/light-emitting-diode): A semiconductor diode that emits light when operated with the appropriate forward current. [Markdown](https://eloragrid.ai/library/entries/light-emitting-diode.md)
- [Varactor diode (VAR)](https://eloragrid.ai/symbols/varactor-diode): A reverse-biased diode whose junction capacitance is used as a voltage-controlled circuit element. [Markdown](https://eloragrid.ai/library/entries/varactor-diode.md)
- [PIN diode (PIN)](https://eloragrid.ai/symbols/pin-diode): A diode structure used in applications such as RF switching or attenuation with a documented bias circuit. [Markdown](https://eloragrid.ai/library/entries/pin-diode.md)
- [NPN bipolar transistor (NPN)](https://eloragrid.ai/symbols/npn-bipolar-transistor): A bipolar transistor with base, collector and emitter terminals arranged for NPN operation. [Markdown](https://eloragrid.ai/library/entries/npn-bipolar-transistor.md)
- [PNP bipolar transistor (PNP)](https://eloragrid.ai/symbols/pnp-bipolar-transistor): A bipolar transistor with base, collector and emitter terminals arranged for PNP operation. [Markdown](https://eloragrid.ai/library/entries/pnp-bipolar-transistor.md)
- [NPN Darlington transistor (NPN-DAR)](https://eloragrid.ai/symbols/npn-darlington-transistor): Two NPN transistor stages connected as a Darlington pair to provide a combined current-amplifying device. [Markdown](https://eloragrid.ai/library/entries/npn-darlington-transistor.md)
- [PNP Darlington transistor (PNP-DAR)](https://eloragrid.ai/symbols/pnp-darlington-transistor): Two PNP transistor stages connected as a compound current-amplifying device. [Markdown](https://eloragrid.ai/library/entries/pnp-darlington-transistor.md)
- [N-channel JFET (N-JFET)](https://eloragrid.ai/symbols/n-channel-jfet): A junction field-effect transistor using an N-type channel controlled through a gate junction. [Markdown](https://eloragrid.ai/library/entries/n-channel-jfet.md)
- [P-channel JFET (P-JFET)](https://eloragrid.ai/symbols/p-channel-jfet): A junction field-effect transistor using a P-type channel and the corresponding gate-bias polarity. [Markdown](https://eloragrid.ai/library/entries/p-channel-jfet.md)
- [N-channel enhancement MOSFET (N-MOS)](https://eloragrid.ai/symbols/n-channel-enhancement-mosfet): An insulated-gate transistor whose N-channel conduction is enabled by the documented gate-to-source drive. [Markdown](https://eloragrid.ai/library/entries/n-channel-enhancement-mosfet.md)
- [P-channel enhancement MOSFET (P-MOS)](https://eloragrid.ai/symbols/p-channel-enhancement-mosfet): An insulated-gate transistor using a P-channel and the corresponding gate-to-source drive polarity. [Markdown](https://eloragrid.ai/library/entries/p-channel-enhancement-mosfet.md)
- [N-channel depletion MOSFET (N-DMOS)](https://eloragrid.ai/symbols/n-channel-depletion-mosfet): An N-channel insulated-gate device that conducts at zero gate-to-source voltage according to its device characteristics. [Markdown](https://eloragrid.ai/library/entries/n-channel-depletion-mosfet.md)
- [Insulated-gate bipolar transistor (IGBT)](https://eloragrid.ai/symbols/insulated-gate-bipolar-transistor): A power transistor combining insulated-gate control with a bipolar collector-emitter conduction structure. [Markdown](https://eloragrid.ai/library/entries/insulated-gate-bipolar-transistor.md)
- [MOSFET body diode (BODY-D)](https://eloragrid.ai/symbols/mosfet-body-diode): The intrinsic diode associated with a MOSFET's semiconductor structure, often shown within the device reference. [Markdown](https://eloragrid.ai/library/entries/mosfet-body-diode.md)
- [GaN enhancement-mode HEMT (E-HEMT)](https://eloragrid.ai/symbols/gan-enhancement-hemt): A normally-off gallium-nitride high-electron-mobility transistor used as a controlled power switch. [Markdown](https://eloragrid.ai/library/entries/gan-enhancement-hemt.md)
- [Integrated gate-commutated thyristor (IGCT)](https://eloragrid.ai/symbols/integrated-gate-commutated-thyristor): A high-power thyristor device operated with an integrated gate-unit arrangement for controlled switching. [Markdown](https://eloragrid.ai/library/entries/integrated-gate-commutated-thyristor.md)
- [NPN phototransistor (PHOTO-NPN)](https://eloragrid.ai/symbols/npn-phototransistor): An NPN transistor whose collector-emitter conduction responds to incident light in the documented detector arrangement. [Markdown](https://eloragrid.ai/library/entries/npn-phototransistor.md)
- [Phototransistor optocoupler (OPTO-TR)](https://eloragrid.ai/symbols/phototransistor-optocoupler): An optical isolation component using an input light emitter and a transistor output on the isolated side. [Markdown](https://eloragrid.ai/library/entries/phototransistor-optocoupler.md)
- [Photodiode optocoupler (OPTO-PD)](https://eloragrid.ai/symbols/photodiode-optocoupler): An optically coupled component using photodiode output sensing for an isolation or feedback arrangement. [Markdown](https://eloragrid.ai/library/entries/photodiode-optocoupler.md)
- [Phototriac optocoupler (OPTO-TRIAC)](https://eloragrid.ai/symbols/phototriac-optocoupler): An optical isolation device whose output is a light-triggered triac-type switching element. [Markdown](https://eloragrid.ai/library/entries/phototriac-optocoupler.md)
- [Photovoltaic MOSFET driver (PV-DRV)](https://eloragrid.ai/symbols/photovoltaic-mosfet-driver): An optical component producing an isolated photovoltaic output used to drive a MOSFET gate circuit. [Markdown](https://eloragrid.ai/library/entries/photovoltaic-mosfet-driver.md)
- [Capacitive digital isolator (DIG-ISO)](https://eloragrid.ai/symbols/capacitive-digital-isolator): Transfers digital information between separately referenced electrical domains through a capacitive isolation structure. [Markdown](https://eloragrid.ai/library/entries/capacitive-digital-isolator.md)
- [Isolated gate driver (ISO-GD)](https://eloragrid.ai/symbols/isolated-gate-driver): Transfers a switching command across an isolation barrier and drives a power-transistor gate circuit. [Markdown](https://eloragrid.ai/library/entries/isolated-gate-driver.md)
- [Low-side gate driver (LS-GD)](https://eloragrid.ai/symbols/low-side-gate-driver): Provides gate-drive current for a power switch referenced to the driver's low-side return. [Markdown](https://eloragrid.ai/library/entries/low-side-gate-driver.md)
- [High-side gate driver (HS-GD)](https://eloragrid.ai/symbols/high-side-gate-driver): Drives a high-side power transistor with the output circuit referenced to its switching node. [Markdown](https://eloragrid.ai/library/entries/high-side-gate-driver.md)
- [Bootstrap gate-drive supply (BOOT)](https://eloragrid.ai/symbols/bootstrap-gate-supply): A diode-capacitor arrangement used to supply a floating high-side gate-driver circuit under documented switching conditions. [Markdown](https://eloragrid.ai/library/entries/bootstrap-gate-supply.md)
- [Ideal-diode controller (IDEAL-D)](https://eloragrid.ai/symbols/ideal-diode-controller): Controls an external transistor to obtain the documented low-loss directional or reverse-blocking power path. [Markdown](https://eloragrid.ai/library/entries/ideal-diode-controller.md)
- [Hot-swap controller (HOT-SWAP)](https://eloragrid.ai/symbols/hot-swap-controller): Controls a power path during equipment insertion or power-up to manage the documented inrush sequence. [Markdown](https://eloragrid.ai/library/entries/hot-swap-controller.md)
- [Electronic fuse IC (EFUSE)](https://eloragrid.ai/symbols/electronic-fuse-ic): An integrated semiconductor power-path device providing the selected current-limiting and protection functions. [Markdown](https://eloragrid.ai/library/entries/electronic-fuse-ic.md)
- [Half-bridge power module (HB-MOD)](https://eloragrid.ai/symbols/half-bridge-power-module): A packaged power-switch arrangement forming one half-bridge switching leg. [Markdown](https://eloragrid.ai/library/entries/half-bridge-power-module.md)
- [Three-phase sixpack power module (6-PACK)](https://eloragrid.ai/symbols/three-phase-sixpack-power-module): A power module containing three switching legs for a three-phase bridge arrangement. [Markdown](https://eloragrid.ai/library/entries/three-phase-sixpack-power-module.md)
- [AND gate (AND)](https://eloragrid.ai/symbols/logic-and-gate): A logic element whose output is true when all stated positive-logic inputs are true. [Markdown](https://eloragrid.ai/library/entries/logic-and-gate.md)
- [OR gate (OR)](https://eloragrid.ai/symbols/logic-or-gate): A positive-logic element whose output is true when at least one input is true. [Markdown](https://eloragrid.ai/library/entries/logic-or-gate.md)
- [NAND gate (NAND)](https://eloragrid.ai/symbols/logic-nand-gate): A logic gate that inverts the result of an AND operation. [Markdown](https://eloragrid.ai/library/entries/logic-nand-gate.md)
- [NOR gate (NOR)](https://eloragrid.ai/symbols/logic-nor-gate): A logic gate that inverts an inclusive-OR result. [Markdown](https://eloragrid.ai/library/entries/logic-nor-gate.md)
- [Exclusive-OR gate (XOR)](https://eloragrid.ai/symbols/logic-xor-gate): For two positive-logic inputs, produces a true output when the input states differ. [Markdown](https://eloragrid.ai/library/entries/logic-xor-gate.md)
- [Exclusive-NOR gate (XNOR)](https://eloragrid.ai/symbols/logic-xnor-gate): For two positive-logic inputs, produces a true output when the input states are equal. [Markdown](https://eloragrid.ai/library/entries/logic-xnor-gate.md)
- [Logic inverter (NOT)](https://eloragrid.ai/symbols/logic-inverter): Produces the opposite logical state of its defined digital input. [Markdown](https://eloragrid.ai/library/entries/logic-inverter.md)
- [Non-inverting logic buffer (BUF)](https://eloragrid.ai/symbols/logic-buffer): Transfers a digital state through a non-inverting logic output stage. [Markdown](https://eloragrid.ai/library/entries/logic-buffer.md)
- [Three-state logic buffer (3STATE)](https://eloragrid.ai/symbols/logic-three-state-buffer): A digital output stage that can drive logical states or enter its documented high-impedance state. [Markdown](https://eloragrid.ai/library/entries/logic-three-state-buffer.md)
- [Schmitt-trigger inverter (SCHMITT-NOT)](https://eloragrid.ai/symbols/schmitt-trigger-inverter): A digital inverter with hysteresis between its input switching thresholds. [Markdown](https://eloragrid.ai/library/entries/schmitt-trigger-inverter.md)
- [Schmitt-trigger buffer (SCHMITT)](https://eloragrid.ai/symbols/schmitt-trigger-buffer): A non-inverting digital element with separate rising and falling input thresholds. [Markdown](https://eloragrid.ai/library/entries/schmitt-trigger-buffer.md)
- [Positive-edge D flip-flop (D-FF)](https://eloragrid.ai/symbols/positive-edge-d-flip-flop): Captures its data input at the documented positive clock edge and retains that digital state. [Markdown](https://eloragrid.ai/library/entries/positive-edge-d-flip-flop.md)
- [Negative-edge JK flip-flop (JK-FF)](https://eloragrid.ai/symbols/negative-edge-jk-flip-flop): Updates or toggles its stored state from J and K inputs at the selected negative clock edge. [Markdown](https://eloragrid.ai/library/entries/negative-edge-jk-flip-flop.md)
- [Set-reset latch (SR-LATCH)](https://eloragrid.ai/symbols/set-reset-latch): Retains a digital state that is changed by the defined set or reset input conditions. [Markdown](https://eloragrid.ai/library/entries/set-reset-latch.md)
- [Transparent D latch (D-LATCH)](https://eloragrid.ai/symbols/transparent-d-latch): Follows the input data while its latch-enable condition is active and retains it when that condition ends. [Markdown](https://eloragrid.ai/library/entries/transparent-d-latch.md)
- [Serial-in parallel-out register (SIPO)](https://eloragrid.ai/symbols/serial-in-parallel-out-register): Shifts serial input data through storage stages to parallel outputs at the documented clock events. [Markdown](https://eloragrid.ai/library/entries/serial-in-parallel-out-register.md)
- [Parallel-in serial-out register (PISO)](https://eloragrid.ai/symbols/parallel-in-serial-out-register): Loads a parallel word and presents its bits through a serial shift output. [Markdown](https://eloragrid.ai/library/entries/parallel-in-serial-out-register.md)
- [Shift register with output latch (SHIFT-LATCH)](https://eloragrid.ai/symbols/latched-shift-register): Combines a serial shift path with a separate output-storage stage. [Markdown](https://eloragrid.ai/library/entries/latched-shift-register.md)
- [Ripple binary counter (CTR-RIP)](https://eloragrid.ai/symbols/ripple-binary-counter): Counts clock events through cascaded storage stages whose output changes do not occur simultaneously. [Markdown](https://eloragrid.ai/library/entries/ripple-binary-counter.md)
- [Synchronous binary counter (CTR-SYNC)](https://eloragrid.ai/symbols/synchronous-binary-counter): Updates its binary count from a common clock with the documented count-enable, load and clear controls. [Markdown](https://eloragrid.ai/library/entries/synchronous-binary-counter.md)
- [Decoded decade counter (DECADE)](https://eloragrid.ai/symbols/one-hot-decade-counter): Advances a decoded output sequence through the documented ten-state counter arrangement. [Markdown](https://eloragrid.ai/library/entries/one-hot-decade-counter.md)
- [Retriggerable monostable (ONE-SHOT)](https://eloragrid.ai/symbols/retriggerable-monostable): Produces a timed output pulse that can be extended by a qualifying retrigger condition. [Markdown](https://eloragrid.ai/library/entries/retriggerable-monostable.md)
- [Binary decoder / demultiplexer (DEC)](https://eloragrid.ai/symbols/binary-decoder-demultiplexer): Uses binary selection and enable conditions to activate the documented selected output. [Markdown](https://eloragrid.ai/library/entries/binary-decoder-demultiplexer.md)
- [Priority encoder (ENC-PRI)](https://eloragrid.ai/symbols/priority-encoder): Encodes the highest-priority qualifying input into the specified binary output word. [Markdown](https://eloragrid.ai/library/entries/priority-encoder.md)
- [Digital multiplexer (MUX)](https://eloragrid.ai/symbols/digital-multiplexer): Selects one of several digital inputs for the documented output according to its selection controls. [Markdown](https://eloragrid.ai/library/entries/digital-multiplexer.md)
- [Digital magnitude comparator (MAG-COMP)](https://eloragrid.ai/symbols/digital-magnitude-comparator): Compares two digital words to provide the specified equality and magnitude indications. [Markdown](https://eloragrid.ai/library/entries/digital-magnitude-comparator.md)
- [Binary full adder (ADD)](https://eloragrid.ai/symbols/binary-full-adder): Adds binary input words with the documented carry-in and produces sum and carry outputs. [Markdown](https://eloragrid.ai/library/entries/binary-full-adder.md)
- [Logic bus transceiver (BUS-TR)](https://eloragrid.ai/symbols/logic-bus-transceiver): Drives data between two digital buses according to the selected direction and enable conditions. [Markdown](https://eloragrid.ai/library/entries/logic-bus-transceiver.md)
- [Logic voltage-level translator (LEVEL)](https://eloragrid.ai/symbols/logic-voltage-level-translator): Transfers digital information between the documented logic-voltage domains. [Markdown](https://eloragrid.ai/library/entries/logic-voltage-level-translator.md)
- [Open-collector buffer (OC-BUF)](https://eloragrid.ai/symbols/open-collector-buffer): Provides a logic output through a transistor pull-down stage requiring the documented external load or pull-up. [Markdown](https://eloragrid.ai/library/entries/open-collector-buffer.md)
- [Parity generator / checker (PARITY)](https://eloragrid.ai/symbols/parity-generator-checker): Computes a parity indication from the defined digital input word. [Markdown](https://eloragrid.ai/library/entries/parity-generator-checker.md)
- [Phase-locked loop (PLL)](https://eloragrid.ai/symbols/phase-locked-loop): Controls an oscillator through a phase-comparison feedback arrangement to follow the documented reference. [Markdown](https://eloragrid.ai/library/entries/phase-locked-loop.md)
- [Voltage-controlled oscillator (VCO)](https://eloragrid.ai/symbols/voltage-controlled-oscillator): Generates an oscillating output whose frequency responds to the documented control voltage. [Markdown](https://eloragrid.ai/library/entries/voltage-controlled-oscillator.md)
- [Clock generator (CLK-GEN)](https://eloragrid.ai/symbols/clock-generator): Provides the documented clock signal or signals used by digital circuitry. [Markdown](https://eloragrid.ai/library/entries/clock-generator.md)
- [Watchdog timer (WDT)](https://eloragrid.ai/symbols/watchdog-timer): Supervises a qualifying activity signal and operates its output when the documented watchdog timing condition is violated. [Markdown](https://eloragrid.ai/library/entries/watchdog-timer.md)
- [Operational amplifier (OP-AMP)](https://eloragrid.ai/symbols/operational-amplifier): An analogue amplifier represented by inverting and non-inverting inputs, an output and its supply connections. [Markdown](https://eloragrid.ai/library/entries/operational-amplifier.md)
- [Voltage comparator (COMP)](https://eloragrid.ai/symbols/voltage-comparator): Compares two analogue input voltages and produces the documented output-state indication. [Markdown](https://eloragrid.ai/library/entries/voltage-comparator.md)
- [Instrumentation amplifier (INA)](https://eloragrid.ai/symbols/instrumentation-amplifier): Amplifies a differential input signal using an instrumentation-amplifier input and gain arrangement. [Markdown](https://eloragrid.ai/library/entries/instrumentation-amplifier.md)
- [Difference amplifier (DIFF-AMP)](https://eloragrid.ai/symbols/difference-amplifier): Produces an analogue output related to the difference between two input signals with the documented gain/reference arrangement. [Markdown](https://eloragrid.ai/library/entries/difference-amplifier.md)
- [Fully differential amplifier (FDA)](https://eloragrid.ai/symbols/fully-differential-amplifier): Processes an analogue input to provide two complementary output signals around a defined common-mode level. [Markdown](https://eloragrid.ai/library/entries/fully-differential-amplifier.md)
- [Current-sense amplifier (CSA)](https://eloragrid.ai/symbols/current-sense-amplifier): Amplifies a voltage associated with a current-sensing shunt using the selected measurement-input arrangement. [Markdown](https://eloragrid.ai/library/entries/current-sense-amplifier.md)
- [Isolation amplifier (ISO-AMP)](https://eloragrid.ai/symbols/isolation-amplifier): Transfers an analogue measurement across the documented electrical isolation boundary. [Markdown](https://eloragrid.ai/library/entries/isolation-amplifier.md)
- [Operational transconductance amplifier (OTA)](https://eloragrid.ai/symbols/operational-transconductance-amplifier): Produces an output current controlled by its differential input voltage and documented bias arrangement. [Markdown](https://eloragrid.ai/library/entries/operational-transconductance-amplifier.md)
- [Analogue multiplier (MULT)](https://eloragrid.ai/symbols/analog-multiplier): Produces an analogue output related to the product of two input quantities and the selected scaling/summing arrangement. [Markdown](https://eloragrid.ai/library/entries/analog-multiplier.md)
- [Analogue bilateral switch (A-SW)](https://eloragrid.ai/symbols/analog-bilateral-switch): Connects or disconnects an analogue signal path under its documented digital control. [Markdown](https://eloragrid.ai/library/entries/analog-bilateral-switch.md)
- [Analogue multiplexer (A-MUX)](https://eloragrid.ai/symbols/analog-multiplexer): Selects a continuous-signal channel through the documented controlled switching arrangement. [Markdown](https://eloragrid.ai/library/entries/analog-multiplexer.md)
- [Sample-and-hold amplifier (S/H)](https://eloragrid.ai/symbols/sample-and-hold-amplifier): Acquires an analogue signal during the documented sampling interval and retains a representation during hold. [Markdown](https://eloragrid.ai/library/entries/sample-and-hold-amplifier.md)
- [Analogue-to-digital converter (ADC)](https://eloragrid.ai/symbols/analog-to-digital-converter): Converts a sampled analogue quantity into the selected digital representation. [Markdown](https://eloragrid.ai/library/entries/analog-to-digital-converter.md)
- [Digital-to-analogue converter (DAC)](https://eloragrid.ai/symbols/digital-to-analog-converter): Converts a digital code into the documented analogue output quantity. [Markdown](https://eloragrid.ai/library/entries/digital-to-analog-converter.md)
- [Series voltage reference (VREF-S)](https://eloragrid.ai/symbols/series-voltage-reference): Provides a reference voltage through a series-connected supply and output arrangement. [Markdown](https://eloragrid.ai/library/entries/series-voltage-reference.md)
- [Shunt voltage reference (VREF-H)](https://eloragrid.ai/symbols/shunt-voltage-reference): Establishes a reference voltage using a shunt-current path and the documented bias or feedback circuit. [Markdown](https://eloragrid.ai/library/entries/shunt-voltage-reference.md)
- [Precision rectifier (PREC-RECT)](https://eloragrid.ai/symbols/precision-rectifier): Uses an active amplifier/diode arrangement to rectify a signal according to the documented circuit. [Markdown](https://eloragrid.ai/library/entries/precision-rectifier.md)
- [RMS-to-DC converter (RMS-DC)](https://eloragrid.ai/symbols/rms-to-dc-converter): Produces a DC output related to the RMS value of its input signal under the selected implementation. [Markdown](https://eloragrid.ai/library/entries/rms-to-dc-converter.md)
- [Voltage / frequency converter (V/F)](https://eloragrid.ai/symbols/voltage-frequency-converter): Converts between an analogue voltage and a pulse-frequency representation in the documented selected configuration. [Markdown](https://eloragrid.ai/library/entries/voltage-frequency-converter.md)
- [Inverting amplifier circuit (INV-AMP)](https://eloragrid.ai/symbols/inverting-amplifier-circuit): Uses an amplifier feedback connection that produces the documented inverted signal relationship. [Markdown](https://eloragrid.ai/library/entries/inverting-amplifier-circuit.md)
- [Non-inverting amplifier circuit (NI-AMP)](https://eloragrid.ai/symbols/non-inverting-amplifier-circuit): Uses an amplifier feedback arrangement to amplify a signal without the intended polarity inversion. [Markdown](https://eloragrid.ai/library/entries/non-inverting-amplifier-circuit.md)
- [Op-amp integrator (INTEGRATOR)](https://eloragrid.ai/symbols/op-amp-integrator): Uses a documented amplifier/capacitor feedback arrangement to obtain an integrating signal response. [Markdown](https://eloragrid.ai/library/entries/op-amp-integrator.md)
- [Op-amp differentiator (DIFFERENTIATOR)](https://eloragrid.ai/symbols/op-amp-differentiator): Uses an amplifier input/feedback arrangement to obtain a differentiating response over its intended operating band. [Markdown](https://eloragrid.ai/library/entries/op-amp-differentiator.md)
- [Active low-pass filter (LPF)](https://eloragrid.ai/symbols/active-low-pass-filter): Passes the intended lower-frequency signal content while attenuating higher-frequency content through an active filter circuit. [Markdown](https://eloragrid.ai/library/entries/active-low-pass-filter.md)
- [Active high-pass filter (HPF)](https://eloragrid.ai/symbols/active-high-pass-filter): Attenuates lower-frequency content while passing the intended higher-frequency signal band. [Markdown](https://eloragrid.ai/library/entries/active-high-pass-filter.md)
- [Active band-pass filter (BPF)](https://eloragrid.ai/symbols/active-band-pass-filter): Passes an intended frequency band while attenuating content below and above that band. [Markdown](https://eloragrid.ai/library/entries/active-band-pass-filter.md)
- [Active notch filter (NOTCH)](https://eloragrid.ai/symbols/active-notch-filter): Attenuates a defined frequency region while retaining the intended content outside it. [Markdown](https://eloragrid.ai/library/entries/active-notch-filter.md)
- [Transimpedance amplifier (TIA)](https://eloragrid.ai/symbols/transimpedance-amplifier): Converts an input current into an output voltage through the documented feedback arrangement. [Markdown](https://eloragrid.ai/library/entries/transimpedance-amplifier.md)
- [Buck converter topology (BUCK)](https://eloragrid.ai/symbols/buck-converter-topology): A switching converter arrangement used to produce a lower DC output from its input under the documented operating conditions. [Markdown](https://eloragrid.ai/library/entries/buck-converter-topology.md)
- [Boost converter topology (BOOST)](https://eloragrid.ai/symbols/boost-converter-topology): A switching converter arrangement used to obtain a higher DC output from its documented input range. [Markdown](https://eloragrid.ai/library/entries/boost-converter-topology.md)
- [Inverting buck-boost topology (INV-BB)](https://eloragrid.ai/symbols/inverting-buck-boost-topology): A buck-boost arrangement whose output polarity is opposite to its defined input reference. [Markdown](https://eloragrid.ai/library/entries/inverting-buck-boost-topology.md)
- [Four-switch buck-boost topology (4SW-BB)](https://eloragrid.ai/symbols/four-switch-buck-boost-topology): A non-inverting conversion arrangement with switching legs that support documented buck and boost operation. [Markdown](https://eloragrid.ai/library/entries/four-switch-buck-boost-topology.md)
- [SEPIC converter topology (SEPIC)](https://eloragrid.ai/symbols/sepic-converter-topology): A non-inverting conversion topology using its documented inductive and series-capacitor energy-transfer arrangement. [Markdown](https://eloragrid.ai/library/entries/sepic-converter-topology.md)
- [Cuk converter topology (CUK)](https://eloragrid.ai/symbols/cuk-converter-topology): An inverting conversion topology using a capacitor as part of the energy-transfer path between inductive stages. [Markdown](https://eloragrid.ai/library/entries/cuk-converter-topology.md)
- [Zeta converter topology (ZETA)](https://eloragrid.ai/symbols/zeta-converter-topology): A non-inverting converter arrangement using its documented inductive and capacitive transfer circuit. [Markdown](https://eloragrid.ai/library/entries/zeta-converter-topology.md)
- [Flyback converter topology (FLYBACK)](https://eloragrid.ai/symbols/flyback-converter-topology): A conversion arrangement that uses coupled magnetic energy storage and transfers energy through the documented switching sequence. [Markdown](https://eloragrid.ai/library/entries/flyback-converter-topology.md)
- [Forward converter topology (FORWARD)](https://eloragrid.ai/symbols/forward-converter-topology): A conversion topology transferring power through coupled windings during the documented primary conduction interval. [Markdown](https://eloragrid.ai/library/entries/forward-converter-topology.md)
- [Active-clamp forward topology (ACF)](https://eloragrid.ai/symbols/active-clamp-forward-topology): A forward converter arrangement with an actively controlled clamp/reset circuit. [Markdown](https://eloragrid.ai/library/entries/active-clamp-forward-topology.md)
- [Push-pull converter topology (PUSH-PULL)](https://eloragrid.ai/symbols/push-pull-converter-topology): A converter arrangement driving two primary paths alternately through the documented coupled winding. [Markdown](https://eloragrid.ai/library/entries/push-pull-converter-topology.md)
- [Half-bridge DC converter topology (HB-DC)](https://eloragrid.ai/symbols/half-bridge-dc-converter-topology): A DC conversion stage using one switching leg and the documented magnetic/secondary circuit. [Markdown](https://eloragrid.ai/library/entries/half-bridge-dc-converter-topology.md)
- [Full-bridge DC converter topology (FB-DC)](https://eloragrid.ai/symbols/full-bridge-dc-converter-topology): A DC conversion stage using two switching legs to apply the documented waveform to a magnetic primary. [Markdown](https://eloragrid.ai/library/entries/full-bridge-dc-converter-topology.md)
- [Phase-shifted full-bridge topology (PSFB)](https://eloragrid.ai/symbols/phase-shift-full-bridge-topology): A full-bridge conversion arrangement controlled through the documented relative switching-leg phase shift. [Markdown](https://eloragrid.ai/library/entries/phase-shift-full-bridge-topology.md)
- [LLC resonant converter topology (LLC)](https://eloragrid.ai/symbols/llc-resonant-converter-topology): A converter arrangement using the documented resonant inductive/capacitive network and magnetic transfer path. [Markdown](https://eloragrid.ai/library/entries/llc-resonant-converter-topology.md)
- [Dual-active-bridge topology (DAB)](https://eloragrid.ai/symbols/dual-active-bridge-topology): A conversion stage with controlled bridges on both sides of a coupled magnetic link. [Markdown](https://eloragrid.ai/library/entries/dual-active-bridge-topology.md)
- [Single-phase voltage-source inverter (1PH-VSI)](https://eloragrid.ai/symbols/single-phase-voltage-source-inverter): A switching bridge that forms a documented single-phase AC output from a DC-link source. [Markdown](https://eloragrid.ai/library/entries/single-phase-voltage-source-inverter.md)
- [Three-phase voltage-source inverter (3PH-VSI)](https://eloragrid.ai/symbols/three-phase-voltage-source-inverter): A three-leg bridge producing the documented three-phase output from a DC-link source. [Markdown](https://eloragrid.ai/library/entries/three-phase-voltage-source-inverter.md)
- [Neutral-point-clamped inverter (NPC)](https://eloragrid.ai/symbols/neutral-point-clamped-inverter): A multilevel switching arrangement using the documented split DC link and neutral-point clamping paths. [Markdown](https://eloragrid.ai/library/entries/neutral-point-clamped-inverter.md)
- [Active front-end rectifier (AFE)](https://eloragrid.ai/symbols/active-front-end-rectifier): An actively switched AC/DC stage using a documented current-control and DC-link regulation arrangement. [Markdown](https://eloragrid.ai/library/entries/active-front-end-rectifier.md)

## Guides

- [How to read an electrical single line diagram](https://eloragrid.ai/library/guides/read-a-single-line-diagram): Follow the sources, switching, bus sections and loads—and separate a symbol from the equipment information behind it.
- [IEC, IEEE, ANSI and JIC: what the drawing references mean](https://eloragrid.ai/library/guides/iec-ieee-ansi-and-jic-symbols): Understand the different reference systems without assuming every similarly named library uses the same graphic or code.
- [CT vs VT: reading instrument transformers on drawings](https://eloragrid.ai/library/guides/current-transformer-vs-voltage-transformer): Distinguish current and voltage measurement, then follow the ratio, polarity, terminal and secondary-circuit references.
- [A GA object is not a manufacturer footprint](https://eloragrid.ai/library/guides/ga-object-vs-manufacturer-footprint): Move from a generic arrangement concept to the exact product drawing, with the correct views, interfaces and document revision.
- [What to reference in a switchroom GA drawing](https://eloragrid.ai/library/guides/switchroom-ga-drawing-checklist): A practical document checklist for equipment identity, views, cable interfaces, access information and links to the electrical drawings.
- [Microgrid drawings: identify the equipment boundaries](https://eloragrid.ai/library/guides/microgrid-drawing-equipment-boundaries): Distinguish generating sources, battery storage, power conversion, switching and controls before connecting their electrical and GA references.