{"schemaVersion":1,"slug":"spring-charge-timeout-alarm","name":"Spring-charge timeout alarm","kind":"symbol","abbreviation":"STA","aliases":["Stored-energy mechanism supervision","switchgear Stored-energy mechanism supervision","switchgear","Switchgear","Charging demand and status","Charge-timeout alarm"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Detects failure to obtain the charged indication within the defined supervision interval.","description":["Detects failure to obtain the charged indication within the defined supervision interval. A stored-energy breaker mechanism has charging, release, indication and supervision functions. Motor supply, stored spring energy and the ability to complete an opening operation are separate drawing concerns.","In a switchgear panel, a charging motor replenishes the mechanism after an operation. Supervisory contacts let the controller report an incomplete charge or repeated charging demand before an operator requests another operation. For this reference, the drawing identifies “Charging demand and status” at the input and “Charge-timeout alarm” at the output. The alarm interval is not a universal charging limit.","Show the individual contacts and the relevant motor or release circuit. Supply voltage, charging time, operating duty and permissible alarms must follow the chosen mechanism documentation. 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: Charging demand and status. Identify its source device or document and the state represented on the drawing.","Follow the named output: Charge-timeout alarm. Cross-reference its destination and separate the command from confirmation that the equipment responded.","The alarm interval is not a universal charging limit.","Show the individual contacts and the relevant motor or release circuit. Supply voltage, charging time, operating duty and permissible alarms must follow the chosen mechanism documentation."],"drawingChecklist":["Label the source and connection reference for charging demand and status.","Identify the destination and defined state of charge-timeout alarm.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: The alarm interval is not a universal charging limit."],"distinction":"The alarm interval is not a universal charging limit. 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":"Charging demand and status"},{"label":"Output / connection","value":"Charge-timeout alarm"},{"label":"Lookup label","value":"STA is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-masterclad","relevance":"Public technical context for stored-energy mechanism supervision. 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","motor","repeated-spring-charging-alarm"],"artwork":"pi26-spring-charge-timeout-alarm","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchgear","family":"mechanism","input":"Charging demand and status","output":"Charge-timeout alarm"},"plainEnglish":{"title":"What this block does","introduction":"Detects failure to obtain the charged indication within the defined supervision interval.","example":"In a switchgear panel, a charging motor replenishes the mechanism after an operation. Supervisory contacts let the controller report an incomplete charge or repeated charging demand before an operator requests another operation. For this reference, the drawing identifies “Charging demand and status” at the input and “Charge-timeout alarm” at the output. The alarm interval is not a universal charging limit.","drawings":"Start at the named input: Charging demand and status. Identify its source device or document and the state represented on the drawing. Follow the named output: Charge-timeout alarm. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Charging demand and status"},{"name":"Output","meaning":"Charge-timeout 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":["Charging demand and status","STA","Charge-timeout 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-mechanism"},"url":"https://eloragrid.ai/symbols/spring-charge-timeout-alarm","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/spring-charge-timeout-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 stored-energy mechanism supervision. 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."}]}