CB
Circuit breaker
A switching device that can interrupt a circuit, with specified fault-interruption capability.
SLD / Schematic
Symbols · CB 1P
Single-pole circuit breaker
A circuit breaker interrupts one pole of a circuit.
SLD / Schematic · CB 1P
What it represents
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.
How to read it
- 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.
Information to show or reference
- State pole count
- Identify trip characteristic
- Cross-reference the neutral arrangement
A distinction that matters
A one-line feeder symbol can represent a multipole device; a single-pole schematic element represents one actual pole.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Circuit-breaker symbol variants
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.
Fundamental characteristics of a circuit-breaker
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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