M
Three-phase motor
An electrical motor load connected to its switching and protective equipment.
SLD / Schematic
Protection functions · 42
Running circuit breaker
Connects a machine to the supply or connection used for normal running.
SLD / Schematic · 42
What it represents
Connects a machine to the supply or connection used for normal running.
In a drafting package, connect this reference to the normal operating supply and machine terminals. The associated drawing should trace the running connection and start/run interlocks; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.
How to read it
- Identify the normal operating supply and machine terminals.
- Trace the running connection and start/run interlocks.
Information to show or reference
- Label the normal operating supply and machine terminals.
- Cross-reference the running connection and start/run interlocks.
- Identify the device tag, manual revision and logic drawing that define this implementation.
A distinction that matters
The running connection may be distinct from the starting circuit numbered 6.
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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