{"schemaVersion":1,"slug":"air-circuit-breaker","name":"Air circuit breaker","kind":"symbol","abbreviation":"ACB","aliases":["air breaker"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"An ACB is a low-voltage circuit breaker using air as its interrupting medium.","description":["An ACB is a low-voltage circuit breaker using air as its interrupting medium. It is frequently used for main incomers or bus couplers and may be fixed or withdrawable."],"readingNotes":["The draw-out mechanism, trip unit and main poles are distinct pieces of drawing information.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State fixed or withdrawable construction","Reference main-pole ratings","Link control and position indication"],"distinction":"ACB denotes an interrupting technology and product family, not a generic synonym for every breaker.","facts":[{"label":"Drawing role","value":"Circuit interruption"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."}],"references":[{"sourceId":"pub-symbol-breaker-types","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}],"related":["circuit-breaker","52-ac-circuit-breaker"],"artwork":"edu-air-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/air-circuit-breaker","illustration":{"url":"https://eloragrid.ai/library/illustrations/air-circuit-breaker.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pub-symbol-breaker-types","title":"Circuit breakers and switches","publisher":"Schneider Electric","url":"https://www.se.com/au/en/product-category/4200-circuit-breakers-and-switches/","type":"manufacturer","scope":"Public manufacturer explanation of the equipment function and selection context.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."}]}