CB
Circuit breaker
A switching device that can interrupt a circuit, with specified fault-interruption capability.
SLD / Schematic
Protection functions · 6
Starting circuit breaker
Connects a machine to the electrical supply used during starting.
SLD / Schematic · 6
What it represents
Connects a machine to the electrical supply used during starting.
In a drafting package, connect this reference to the starting supply and machine connection. The associated drawing should trace the starting breaker control and status; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.
How to read it
- Identify the starting supply and machine connection.
- Trace the starting breaker control and status.
Information to show or reference
- Label the starting supply and machine connection.
- Cross-reference the starting breaker control and status.
- Identify the device tag, manual revision and logic drawing that define this implementation.
A distinction that matters
A starting breaker serves the start arrangement; device 42 identifies the normal running connection.
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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