CB
Circuit breaker
A switching device that can interrupt a circuit, with specified fault-interruption capability.
SLD / Schematic
IEEE / ANSI · CB
ANSI/IEEE circuit breaker symbol
IEEE-oriented graphical reference for circuit breaker, with public vendor evidence and drawing-reading notes.
IEEE / ANSI · Autodesk IEEE-oriented 1 Pole Circuit Breakers functional form
Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
SLD / Schematic · CB
What it represents
The breaker representation identifies the interrupting device in an IEEE-oriented schematic library. Follow its two power connections before interpreting the operating or protection annotation; auxiliary contacts and trip coils belong to separately linked circuits.
This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic.
How to read it
- A one-line breaker endpoint does not expose every pole of the physical device.
- Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code.
Information to show or reference
- State protected circuit
- Record pole count
- Cross-reference trip and auxiliary circuits
A distinction that matters
The graphical breaker reference identifies equipment; ANSI device number 52 identifies an AC circuit-breaker function and is not a substitute glyph.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEEE Symbol Preview — 1 Pole Circuit Breakers
Exact public IEEE-oriented category page verifying the component name and vendor block identifier.
IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
Graphic-symbol standards context and official status; not a source of reproduced artwork.
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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Load-break switch
A switch with a specified capability to make and break normal load current.
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52
AC circuit breaker
The device-function number identifying an AC circuit breaker.
Protection functions
Put the reference into a drawing workflow.
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