CB
Circuit breaker
A switching device that can interrupt a circuit, with specified fault-interruption capability.
SLD / Schematic
Protection functions · 84
Operating mechanism
Provides the motive action that operates electrical apparatus.
SLD / Schematic · 84
What it represents
Provides the motive action that operates electrical apparatus.
In a drafting package, connect this reference to the mechanism motor or actuator supply. The associated drawing should trace the operated apparatus, command circuit and position proof; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.
How to read it
- Identify the mechanism motor or actuator supply.
- Trace the operated apparatus, command circuit and position proof.
Information to show or reference
- Label the mechanism motor or actuator supply.
- Cross-reference the operated apparatus, command circuit and position proof.
- Identify the device tag, manual revision and logic drawing that define this implementation.
A distinction that matters
The mechanism and the power-switching device are separate drawing functions even when supplied as one assembly.
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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