{"schemaVersion":1,"slug":"auxiliary-board-load-shedding-input","name":"Auxiliary-board load-shedding input","kind":"symbol","abbreviation":"ALI","aliases":["Switchroom auxiliary AC distribution","switchrooms Switchroom auxiliary AC distribution","switchrooms","Switchrooms","Load-shedding command","Assigned auxiliary-load disconnection"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Receives the command to disconnect the room loads selected by the load-priority scheme.","description":["Receives the command to disconnect the room loads selected by the load-priority scheme. An auxiliary AC distribution diagram identifies the supplies serving room services and control-support equipment. Essential, backed-up and ordinary circuits can have different source paths and operating priorities.","In a switchroom, the lighting, service sockets, charger input and room cooling may be fed from different auxiliary branches. A source change must preserve the identities of loads that require continuity. For this reference, the drawing identifies “Load-shedding command” at the input and “Assigned auxiliary-load disconnection” at the output. The essential-load definition governs exclusions.","Label source, branch protection and load purpose. The arrangement does not establish conductor sizes, protection settings or installation compliance; it links the operating role to the selected equipment schedule. 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: Load-shedding command. Identify its source device or document and the state represented on the drawing.","Follow the named output: Assigned auxiliary-load disconnection. Cross-reference its destination and separate the command from confirmation that the equipment responded.","The essential-load definition governs exclusions.","Label source, branch protection and load purpose. The arrangement does not establish conductor sizes, protection settings or installation compliance; it links the operating role to the selected equipment schedule."],"drawingChecklist":["Label the source and connection reference for load-shedding command.","Identify the destination and defined state of assigned auxiliary-load disconnection.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: The essential-load definition governs exclusions."],"distinction":"The essential-load definition governs exclusions. 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":"Switchrooms"},{"label":"Input / boundary","value":"Load-shedding command"},{"label":"Output / connection","value":"Assigned auxiliary-load disconnection"},{"label":"Lookup label","value":"ALI is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-station-power","relevance":"Public technical context for switchroom auxiliary ac distribution. 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":["ga-panel-service-outlet","ac-uninterruptible-power-supply","switchroom-essential-ac-bus"],"artwork":"pi26-auxiliary-board-load-shedding-input","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchrooms","family":"room-ac","input":"Load-shedding command","output":"Assigned auxiliary-load disconnection"},"plainEnglish":{"title":"What this block does","introduction":"Receives the command to disconnect the room loads selected by the load-priority scheme.","example":"In a switchroom, the lighting, service sockets, charger input and room cooling may be fed from different auxiliary branches. A source change must preserve the identities of loads that require continuity. For this reference, the drawing identifies “Load-shedding command” at the input and “Assigned auxiliary-load disconnection” at the output. The essential-load definition governs exclusions.","drawings":"Start at the named input: Load-shedding command. Identify its source device or document and the state represented on the drawing. Follow the named output: Assigned auxiliary-load disconnection. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Load-shedding command"},{"name":"Output","meaning":"Assigned auxiliary-load disconnection"},{"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":["Load-shedding command","ALI","Assigned auxiliary-load disconnection"],"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-room-ac"},"url":"https://eloragrid.ai/symbols/auxiliary-board-load-shedding-input","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/auxiliary-board-load-shedding-input.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 switchroom auxiliary ac distribution. 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."}]}