# Air circuit breaker

Canonical URL: https://eloragrid.ai/symbols/air-circuit-breaker
Publisher: Elora Grid
Updated: 2026-10-13
Lookup label: ACB
Drawing use: SLD, Schematic
Reference families: IEC, Manufacturer

An ACB is a low-voltage circuit breaker using air as its interrupting medium.

## What it represents

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.

## How to read it

- 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.

## Information to show or reference

- State fixed or withdrawable construction
- Reference main-pole ratings
- Link control and position indication

## Important distinction

ACB denotes an interrupting technology and product family, not a generic synonym for every breaker.

## Facts

- Drawing role: Circuit interruption
- Representation scope: Functional concept; not an official standard graphic or a product footprint
- Identifier status: 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.

## Public references

- [Circuit breakers and switches](https://www.se.com/au/en/product-category/4200-circuit-breakers-and-switches/) — Schneider Electric. Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.