KEY SEL 3
Three-position key selector
A three-position key selector combines position selection with a key-operated mechanism.
Schematic
IEEE / ANSI · KEY SEL 3
ANSI/IEEE three-position key selector symbol
IEEE-oriented graphical reference for three-position key selector, with public vendor evidence and drawing-reading notes.
IEEE / ANSI · Autodesk IEEE-oriented 3 Position Selector Switches functional form
Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · KEY SEL 3
What it represents
The key-operated three-position selector form combines a contact schedule with controlled operator access. Stable positions, return behaviour and key-removal restrictions must be supplied by the chosen operator assembly.
This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic.
How to read it
- Identify where the key may be removed without assuming every position permits it.
- Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code.
Information to show or reference
- Label three positions
- State key-removal conditions
- Reference terminal schedule
A distinction that matters
Key access does not change the contacts' electrical ratings or establish an isolation function.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEEE Symbol Preview — 3 Position Selector Switches
Exact public IEEE-oriented category page verifying the component name and vendor block identifier.
IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
Graphic-symbol standards context and official status; not a source of reproduced artwork.
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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