# ANSI/IEEE circuit breaker with undervoltage release symbol

Canonical URL: https://eloragrid.ai/symbols/ansi-circuit-breaker-with-undervoltage-release
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: CB UV
Drawing use: SLD, Schematic
Reference families: IEEE / ANSI, Manufacturer

## Symbol convention

Convention: IEEE / ANSI
Form: Autodesk IEEE-oriented 1 Pole Circuit Breakers 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: [Circuit breaker with undervoltage release](https://eloragrid.ai/symbols/circuit-breaker-with-undervoltage-release)

IEEE-oriented graphical reference for circuit breaker with undervoltage release, with public vendor evidence and drawing-reading notes.

## What it represents

This combined breaker form marks a current protective device with a documented loss-of-voltage operating function. The control-voltage path must be established from the actual equipment diagram because it can differ from the feeder voltage being interrupted.
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

- Follow the release supply independently of the main feeder.
- 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

- State release input
- Show control terminals
- Reference voltage-loss behaviour

## Important distinction

A breaker release and a voltage-measuring relay are different devices even when both contribute to the same trip sequence.

## Facts

- Convention evidence: Autodesk IEEE Symbol Preview — 1 Pole Circuit Breakers
- Public vendor block name: HCB11Q33 (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 — 1 Pole Circuit Breakers](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7F08A484-0517-4954-BD68-1648DDBC84A1.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.