CB
Circuit breaker
A switching device that can interrupt a circuit, with specified fault-interruption capability.
SLD / Schematic
Protection functions · 22
Equalizer circuit breaker
Switches an equalising connection used in a machine or generator arrangement.
SLD / Schematic · 22
What it represents
Switches an equalising connection used in a machine or generator arrangement.
In a drafting package, connect this reference to the equaliser conductors and connected machines. The associated drawing should trace the breaker operating and interlocking circuits; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.
This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design.
How to read it
- Identify the equaliser conductors and connected machines.
- Trace the breaker operating and interlocking circuits.
Information to show or reference
- Label the equaliser conductors and connected machines.
- Cross-reference the breaker operating and interlocking circuits.
- Identify the device tag, manual revision and logic drawing that define this implementation.
A distinction that matters
The equalising connection has a specific system purpose; do not infer a bus-coupler application solely from the number.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
ANSI device-number and suffix reference table
Public manufacturer number/name association. Drafting explanations are independently written.
IEEE C37.2-2022: power-system device function numbers
Normative device-number publication; exact edition wording and compliance require the licensed standard.
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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