{"schemaVersion":1,"slug":"cabinet-control-supply-healthy-relay","name":"Cabinet control-supply healthy relay","kind":"symbol","abbreviation":"CCHR","aliases":["Switchgear control-power supervision","switchgear Switchgear control-power supervision","switchgear","Switchgear","Cabinet supply measurements","Supply-healthy contact"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Provides the defined common health indication for the cabinet's monitored control supply.","description":["Provides the defined common health indication for the cabinet's monitored control supply. 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 “Cabinet supply measurements” at the input and “Supply-healthy contact” at the output. Its monitored boundary must be stated.","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: Cabinet supply measurements. Identify its source device or document and the state represented on the drawing.","Follow the named output: Supply-healthy contact. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Its monitored boundary must be stated.","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 cabinet supply measurements.","Identify the destination and defined state of supply-healthy contact.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Its monitored boundary must be stated."],"distinction":"Its monitored boundary must be stated. 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":"Cabinet supply measurements"},{"label":"Output / connection","value":"Supply-healthy contact"},{"label":"Lookup label","value":"CCHR 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","control-power-fuse-failure-aggregation"],"artwork":"pi26-cabinet-control-supply-healthy-relay","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchgear","family":"control-power","input":"Cabinet supply measurements","output":"Supply-healthy contact"},"plainEnglish":{"title":"What this block does","introduction":"Provides the defined common health indication for the cabinet's monitored control supply.","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 “Cabinet supply measurements” at the input and “Supply-healthy contact” at the output. Its monitored boundary must be stated.","drawings":"Start at the named input: Cabinet supply measurements. Identify its source device or document and the state represented on the drawing. Follow the named output: Supply-healthy contact. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Cabinet supply measurements"},{"name":"Output","meaning":"Supply-healthy contact"},{"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":["Cabinet supply measurements","CCHR","Supply-healthy contact"],"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/cabinet-control-supply-healthy-relay","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/cabinet-control-supply-healthy-relay.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."}]}