# ANSI/IEEE three-position key selector symbol

Canonical URL: https://eloragrid.ai/symbols/ansi-three-position-key-selector
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: KEY SEL 3
Drawing use: Schematic
Reference families: IEEE / ANSI, Manufacturer

## Symbol convention

Convention: IEEE / ANSI
Form: 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.
Related representation: [Three-position key selector](https://eloragrid.ai/symbols/three-position-key-selector)

IEEE-oriented graphical reference for three-position key selector, with public vendor evidence and drawing-reading notes.

## 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

## Important distinction

Key access does not change the contacts' electrical ratings or establish an isolation function.

## Facts

- Convention evidence: Autodesk IEEE Symbol Preview — 3 Position Selector Switches
- Public vendor block name: HSS11S40 (Autodesk identifier; not an IEEE symbol number)
- Standards context: IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved.
- Artwork scope: Original functional illustration; exact standard glyph and compliance are not certified

## Public references

- [Autodesk IEEE Symbol Preview — 3 Position Selector Switches](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-5B722789-B342-4708-8671-579360D15DCA.htm) — Autodesk. 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](https://standards.ieee.org/ieee/315/515/) — IEEE Standards Association. Graphic-symbol standards context and official status; not a source of reproduced artwork.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.