{"schemaVersion":1,"slug":"capacitor-trip-operating-interface","name":"Capacitor-trip operating interface","kind":"symbol","abbreviation":"COI","aliases":["Switching-device operating references","switchgear Switching-device operating references","switchgear","Switchgear","Charged capacitor unit","Trip operating energy"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Uses stored electrical energy in a documented capacitor-trip unit to support an opening operation.","description":["Uses stored electrical energy in a documented capacitor-trip unit to support an opening operation. A switching-device operating reference adds the specific mechanism or duty context needed to interpret its place in a power circuit. The same basic switching outline can serve different equipment constructions, so the added description must remain attached to its device tag.","In a medium-voltage switchgear drawing, the operating reference helps the reader distinguish the interrupting device from its isolation, earthing and auxiliary-control interfaces. For this reference, the drawing identifies “Charged capacitor unit” at the input and “Trip operating energy” at the output. Stored charge requires its own supervision and handling rules.","Use the device schedule for its actual construction, operating duty and ratings. These original functional illustrations describe the named role and do not certify a standard glyph or product footprint. The functional block is an independent explanation of this named application. Equipment-specific ratings, terminal connections and operating conditions must be established in the project documentation."],"readingNotes":["Start at the named input: Charged capacitor unit. Identify its source device or document and the state represented on the drawing.","Follow the named output: Trip operating energy. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Stored charge requires its own supervision and handling rules.","Use the device schedule for its actual construction, operating duty and ratings. These original functional illustrations describe the named role and do not certify a standard glyph or product footprint."],"drawingChecklist":["Label the source and connection reference for charged capacitor unit.","Identify the destination and defined state of trip operating energy.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Stored charge requires its own supervision and handling rules."],"distinction":"Stored charge requires its own supervision and handling rules. This reference describes the named application; it does not establish a new IEC graphical symbol, an ANSI device-function number or an exact manufacturer connection diagram.","facts":[{"label":"Representation","value":"Functional block"},{"label":"Installation focus","value":"Switchgear"},{"label":"Input / boundary","value":"Charged capacitor unit"},{"label":"Output / connection","value":"Trip operating energy"},{"label":"Lookup label","value":"COI is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-breaker-products","relevance":"Public technical context for switching-device operating references. Circuit-breaker construction and interruption families. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["circuit-breaker","disconnector","undervoltage-release-holding-interface"],"artwork":"pi26-capacitor-trip-operating-interface","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchgear","family":"device-functions","input":"Charged capacitor unit","output":"Trip operating energy"},"plainEnglish":{"title":"What this block does","introduction":"Uses stored electrical energy in a documented capacitor-trip unit to support an opening operation.","example":"In a medium-voltage switchgear drawing, the operating reference helps the reader distinguish the interrupting device from its isolation, earthing and auxiliary-control interfaces. For this reference, the drawing identifies “Charged capacitor unit” at the input and “Trip operating energy” at the output. Stored charge requires its own supervision and handling rules.","drawings":"Start at the named input: Charged capacitor unit. Identify its source device or document and the state represented on the drawing. Follow the named output: Trip operating energy. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Charged capacitor unit"},{"name":"Output","meaning":"Trip operating energy"},{"name":"Application reference","meaning":"An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections."}],"diagram":"flow","steps":["Charged capacitor unit","COI","Trip operating energy"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"High-voltage circuit breakers","url":"https://www.siemens-energy.com/global/en/home/products-services/product-offerings/circuit-breakers.html"}],"profileId":"power-installation-device-functions"},"url":"https://eloragrid.ai/symbols/capacitor-trip-operating-interface","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/capacitor-trip-operating-interface.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pi26-breaker-products","publisher":"Siemens Energy","title":"High-voltage circuit breakers","url":"https://www.siemens-energy.com/global/en/home/products-services/product-offerings/circuit-breakers.html","scope":"Circuit-breaker construction and interruption families.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for switching-device operating references. Circuit-breaker construction and interruption families. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}