{"schemaVersion":1,"slug":"earthing-switch-motor-operator-interface","name":"Earthing-switch motor operator interface","kind":"symbol","abbreviation":"EMOI","aliases":["Switching-device operating references","switchgear Switching-device operating references","switchgear","Switchgear","Permitted earthing command","Earthing-switch drive action"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Shows the control interface of the selected electrically operated earthing switch.","description":["Shows the control interface of the selected electrically operated earthing switch. 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 “Permitted earthing command” at the input and “Earthing-switch drive action” at the output. Earthing operation depends on the complete isolation scheme.","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: Permitted earthing command. Identify its source device or document and the state represented on the drawing.","Follow the named output: Earthing-switch drive action. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Earthing operation depends on the complete isolation scheme.","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 permitted earthing command.","Identify the destination and defined state of earthing-switch drive action.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Earthing operation depends on the complete isolation scheme."],"distinction":"Earthing operation depends on the complete isolation scheme. 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":"Permitted earthing command"},{"label":"Output / connection","value":"Earthing-switch drive action"},{"label":"Lookup label","value":"EMOI 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","circuit-breaker-trip-free-mechanism-reference"],"artwork":"pi26-earthing-switch-motor-operator-interface","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchgear","family":"device-functions","input":"Permitted earthing command","output":"Earthing-switch drive action"},"plainEnglish":{"title":"What this block does","introduction":"Shows the control interface of the selected electrically operated earthing switch.","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 “Permitted earthing command” at the input and “Earthing-switch drive action” at the output. Earthing operation depends on the complete isolation scheme.","drawings":"Start at the named input: Permitted earthing command. Identify its source device or document and the state represented on the drawing. Follow the named output: Earthing-switch drive action. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Permitted earthing command"},{"name":"Output","meaning":"Earthing-switch drive action"},{"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":["Permitted earthing command","EMOI","Earthing-switch drive action"],"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/earthing-switch-motor-operator-interface","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/earthing-switch-motor-operator-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."}]}