CB
Circuit breaker
A switching device that can interrupt a circuit, with specified fault-interruption capability.
SLD / Schematic
Symbols · ACB
Air circuit breaker
An ACB is a low-voltage circuit breaker using air as its interrupting medium.
SLD / Schematic · ACB
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
A distinction that matters
ACB denotes an interrupting technology and product family, not a generic synonym for every breaker.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Circuit breakers and switches
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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