{"schemaVersion":1,"slug":"control-power-loss-event-capture","name":"Control-power loss event capture","kind":"symbol","abbreviation":"CLEC","aliases":["Switchgear control-power supervision","switchgear Switchgear control-power supervision","switchgear","Switchgear","Supply-state transitions","Time-tagged power event"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Records loss and restoration of the assigned control supply for later diagnosis.","description":["Records loss and restoration of the assigned control supply for later diagnosis. Control power supplies the command, protection and indication equipment associated with a switchgear assembly. The drawing must distinguish the source, each distribution branch and the functions lost if that branch fails.","In a switchgear lineup, separate protected branches may feed trip coils, closing coils and protection electronics. Their alarm contacts help the station controller identify which operating capability is unavailable. For this reference, the drawing identifies “Supply-state transitions” at the input and “Time-tagged power event” at the output. Recorder power continuity affects event capture.","Follow the actual positive, negative or neutral returns and the protective device on each branch. A healthy voltage indication does not establish that every downstream path can deliver its required operating current. 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: Supply-state transitions. Identify its source device or document and the state represented on the drawing.","Follow the named output: Time-tagged power event. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Recorder power continuity affects event capture.","Follow the actual positive, negative or neutral returns and the protective device on each branch. A healthy voltage indication does not establish that every downstream path can deliver its required operating current."],"drawingChecklist":["Label the source and connection reference for supply-state transitions.","Identify the destination and defined state of time-tagged power event.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Recorder power continuity affects event capture."],"distinction":"Recorder power continuity affects event capture. 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":"Supply-state transitions"},{"label":"Output / connection","value":"Time-tagged power event"},{"label":"Lookup label","value":"CLEC is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-station-power","relevance":"Public technical context for switchgear control-power supervision. Independent AC and DC sources for station auxiliary power. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["relay-coil","ac-to-dc-power-supply","trip-supply-dc-distribution-branch"],"artwork":"pi26-control-power-loss-event-capture","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchgear","family":"control-power","input":"Supply-state transitions","output":"Time-tagged power event"},"plainEnglish":{"title":"What this block does","introduction":"Records loss and restoration of the assigned control supply for later diagnosis.","example":"In a switchgear lineup, separate protected branches may feed trip coils, closing coils and protection electronics. Their alarm contacts help the station controller identify which operating capability is unavailable. For this reference, the drawing identifies “Supply-state transitions” at the input and “Time-tagged power event” at the output. Recorder power continuity affects event capture.","drawings":"Start at the named input: Supply-state transitions. Identify its source device or document and the state represented on the drawing. Follow the named output: Time-tagged power event. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Supply-state transitions"},{"name":"Output","meaning":"Time-tagged power event"},{"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":["Supply-state transitions","CLEC","Time-tagged power event"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"SEL-RPM redundant power module","url":"https://selinc.com/products/RPM/"}],"profileId":"power-installation-control-power"},"url":"https://eloragrid.ai/symbols/control-power-loss-event-capture","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/control-power-loss-event-capture.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pi26-station-power","publisher":"SEL","title":"SEL-RPM redundant power module","url":"https://selinc.com/products/RPM/","scope":"Independent AC and DC sources for station auxiliary power.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for switchgear control-power supervision. Independent AC and DC sources for station auxiliary power. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}