SS
Selector switch
An operator switch selecting between documented control positions.
Schematic
Symbols · SEL 3 CRET
Three-position centre-return selector
A centre-return selector returns from both outer positions to its documented central rest position.
Schematic · SEL 3 CRET
What it represents
A centre-return selector returns from both outer positions to its documented central rest position. It can issue opposite momentary commands without retaining either outer position.
How to read it
- The centre rest position still needs a defined contact state.
- The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation.
Information to show or reference
- Name centre condition
- Identify both momentary commands
- State contact schedule
A distinction that matters
Centre return describes the mechanism; centre off describes a contact condition.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
AutoCAD Electrical: Three-position selectors
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.
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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