{"schemaVersion":1,"slug":"breaker-position-discrepancy-alarm","name":"Breaker position-discrepancy alarm","kind":"symbol","abbreviation":"BPA","aliases":["Breaker position and status interfaces","switchgear Breaker position and status interfaces","switchgear","Switchgear","Auxiliary-contact disagreement","Position-discrepancy alarm"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Reports an auxiliary-contact combination that persists beyond the allowed transition interval.","description":["Reports an auxiliary-contact combination that persists beyond the allowed transition interval. Breaker status indications describe the operating mechanism, the removable truck or the health of a supporting system. These signals are related but are not interchangeable: an open breaker can still have its truck connected to live bus contacts.","In a switchgear control schematic, the bay controller compares independent status contacts before displaying a position or allowing another operation. The signal labels explain which physical state each contact represents. For this reference, the drawing identifies “Auxiliary-contact disagreement” at the input and “Position-discrepancy alarm” at the output. The transition allowance is project-specific.","Keep contact reference conditions, terminal numbers and interpretation logic together. Distinguish a mechanically operated indication from a measured current or voltage condition. 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: Auxiliary-contact disagreement. Identify its source device or document and the state represented on the drawing.","Follow the named output: Position-discrepancy alarm. Cross-reference its destination and separate the command from confirmation that the equipment responded.","The transition allowance is project-specific.","Keep contact reference conditions, terminal numbers and interpretation logic together. Distinguish a mechanically operated indication from a measured current or voltage condition."],"drawingChecklist":["Label the source and connection reference for auxiliary-contact disagreement.","Identify the destination and defined state of position-discrepancy alarm.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: The transition allowance is project-specific."],"distinction":"The transition allowance is project-specific. 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":"Auxiliary-contact disagreement"},{"label":"Output / connection","value":"Position-discrepancy alarm"},{"label":"Lookup label","value":"BPA is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-masterclad","relevance":"Public technical context for breaker position and status interfaces. Breaker control, mechanism, position contacts, racking interlocks and test interfaces. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["circuit-breaker","normally-open-contact","breaker-intermediate-position-indication"],"artwork":"pi26-breaker-position-discrepancy-alarm","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchgear","family":"positions","input":"Auxiliary-contact disagreement","output":"Position-discrepancy alarm"},"plainEnglish":{"title":"What this block does","introduction":"Reports an auxiliary-contact combination that persists beyond the allowed transition interval.","example":"In a switchgear control schematic, the bay controller compares independent status contacts before displaying a position or allowing another operation. The signal labels explain which physical state each contact represents. For this reference, the drawing identifies “Auxiliary-contact disagreement” at the input and “Position-discrepancy alarm” at the output. The transition allowance is project-specific.","drawings":"Start at the named input: Auxiliary-contact disagreement. Identify its source device or document and the state represented on the drawing. Follow the named output: Position-discrepancy alarm. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Auxiliary-contact disagreement"},{"name":"Output","meaning":"Position-discrepancy alarm"},{"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":["Auxiliary-contact disagreement","BPA","Position-discrepancy alarm"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"Masterclad medium-voltage switchgear: circuit-breaker section interlocks","url":"https://productinfo.se.com/masterclad_mv_switchgear_ib/6055-30-masterclad-15kv-mv-switchgear-ib/English/6055-30%20Masterclad%20MV%20Switchgear%20Indoor%20%28bookmap%29_DD00646805.xml/%24/Section6-CircuitBreakerSectionInter-58DD6EC7"}],"profileId":"power-installation-positions"},"url":"https://eloragrid.ai/symbols/breaker-position-discrepancy-alarm","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/breaker-position-discrepancy-alarm.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pi26-masterclad","publisher":"Schneider Electric","title":"Masterclad medium-voltage switchgear: circuit-breaker section interlocks","url":"https://productinfo.se.com/masterclad_mv_switchgear_ib/6055-30-masterclad-15kv-mv-switchgear-ib/English/6055-30%20Masterclad%20MV%20Switchgear%20Indoor%20%28bookmap%29_DD00646805.xml/%24/Section6-CircuitBreakerSectionInter-58DD6EC7","scope":"Breaker control, mechanism, position contacts, racking interlocks and test interfaces.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for breaker position and status interfaces. Breaker control, mechanism, position contacts, racking interlocks and test interfaces. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}