{"schemaVersion":1,"slug":"single-pole-circuit-breaker","name":"Single-pole circuit breaker","kind":"symbol","abbreviation":"CB 1P","aliases":["HCB1","VCB1"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"A circuit breaker interrupts one pole of a circuit.","description":["A circuit breaker interrupts one pole of a circuit. In an expanded schematic the remaining conductors, neutral and protective conductor are drawn separately; the single-pole image does not describe a complete supply arrangement."],"readingNotes":["Count the protected and switched poles independently of the circuit phase count.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["State pole count","Identify trip characteristic","Cross-reference the neutral arrangement"],"distinction":"A one-line feeder symbol can represent a multipole device; a single-pole schematic element represents one actual pole.","facts":[{"label":"Drawing role","value":"Circuit interruption"},{"label":"Representation scope","value":"Functional concept; not an official standard graphic or a product footprint"},{"label":"Public vendor block reference","value":"HCB1, VCB1 (Autodesk identifiers; not IEC symbol numbers)"},{"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":"autodesk-breakers","relevance":"Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic."},{"sourceId":"breaker-characteristics","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-single-pole-circuit-breaker","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/single-pole-circuit-breaker","illustration":{"url":"https://eloragrid.ai/library/illustrations/single-pole-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":"autodesk-breakers","title":"Circuit-breaker symbol variants","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-DB1548A3-A4D3-47E5-86AC-37000DC57D80.htm","type":"cad-reference","scope":"Circuit-breaker variants and thermal, magnetic and differential qualifiers.","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."},{"id":"breaker-characteristics","title":"Fundamental characteristics of a circuit-breaker","publisher":"Schneider Electric — Electrical Installation Guide","url":"https://www.electrical-installation.org/enwiki/Fundamental_characteristics_of_a_circuit-breaker","type":"manufacturer","scope":"Voltage, current, tripping and breaking-capacity concepts; not a product selection or settings prescription.","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."}]}