# Three-position key selector

Canonical URL: https://eloragrid.ai/symbols/three-position-key-selector
Publisher: Elora Grid
Updated: 2026-10-13
Lookup label: KEY SEL 3
Drawing use: Schematic
Reference families: IEC, Manufacturer

A three-position key selector combines position selection with a key-operated mechanism.

## What it represents

A three-position key selector combines position selection with a key-operated mechanism. Stable positions, return behaviour and key-removal conditions are all required for a complete control description.

## How to read it

- Do not assume that a removable key is allowed in every selected position.
- 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

- List positions
- State key-removal conditions
- Cross-reference contact schedule

## Important distinction

Key operation adds access control to a selector; it does not change its electrical contact ratings.

## Facts

- Drawing role: Position selection
- Representation scope: Functional concept; not an official standard graphic or a product footprint
- Public vendor block reference: HSS11S40, VSS11S40 (Autodesk identifiers; not IEC symbol numbers)
- Identifier status: The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name.

## Public references

- [AutoCAD Electrical: Three-position selectors](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-D8675B9D-9CBF-4B7F-8F09-2444779614D0.htm) — Autodesk. Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.

## 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.