# Three-pole gang-operated breaker reference

Canonical URL: https://eloragrid.ai/symbols/three-pole-gang-operated-breaker-reference
Publisher: Elora Grid
Updated: 2026-11-03
Lookup label: TGBR
Drawing use: Schematic
Reference families: Manufacturer

Representation: Functional block
Installation focus: switchgear
Input: Common mechanism command
Output: Three-pole operation

Identifies a mechanism arrangement coordinating all three poles through its documented operation.

## In plain English

### What this block does

Identifies a mechanism arrangement coordinating all three poles through its documented operation.

### A simple example

In a medium-voltage switchgear drawing, the operating reference helps the reader distinguish the interrupting device from its isolation, earthing and auxiliary-control interfaces. For this reference, the drawing identifies “Common mechanism command” at the input and “Three-pole operation” at the output. Simultaneous command does not imply identical contact timing.

### What the drawings help you do

Start at the named input: Common mechanism command. Identify its source device or document and the state represented on the drawing. Follow the named output: Three-pole operation. Cross-reference its destination and separate the command from confirmation that the equipment responded.

### Terms

- Input: Common mechanism command
- Output: Three-pole operation
- Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.

Concept diagram: Common mechanism command → TGBR → Three-pole operation
A reading guide. The entry's original illustration and input/output facts describe this application.

- [High-voltage circuit breakers](https://www.siemens-energy.com/global/en/home/products-services/product-offerings/circuit-breakers.html)


## What it represents

Identifies a mechanism arrangement coordinating all three poles through its documented operation. A switching-device operating reference adds the specific mechanism or duty context needed to interpret its place in a power circuit. The same basic switching outline can serve different equipment constructions, so the added description must remain attached to its device tag.
In a medium-voltage switchgear drawing, the operating reference helps the reader distinguish the interrupting device from its isolation, earthing and auxiliary-control interfaces. For this reference, the drawing identifies “Common mechanism command” at the input and “Three-pole operation” at the output. Simultaneous command does not imply identical contact timing.
Use the device schedule for its actual construction, operating duty and ratings. These original functional illustrations describe the named role and do not certify a standard glyph or product footprint. The functional block is an independent explanation of this named application. Equipment-specific ratings, terminal connections and operating conditions must be established in the project documentation.

## How to read it

- Start at the named input: Common mechanism command. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Three-pole operation. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Simultaneous command does not imply identical contact timing.
- Use the device schedule for its actual construction, operating duty and ratings. These original functional illustrations describe the named role and do not certify a standard glyph or product footprint.

## Information to show or reference

- Label the source and connection reference for common mechanism command.
- Identify the destination and defined state of three-pole operation.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: Simultaneous command does not imply identical contact timing.

## Important distinction

Simultaneous command does not imply identical contact timing. This reference describes the named application; it does not establish a new IEC graphical symbol, an ANSI device-function number or an exact manufacturer connection diagram.

## Facts

- Representation: Functional block
- Installation focus: Switchgear
- Input / boundary: Common mechanism command
- Output / connection: Three-pole operation
- Lookup label: TGBR is a library lookup label, not a standard device designation.

## Public references

- [High-voltage circuit breakers](https://www.siemens-energy.com/global/en/home/products-services/product-offerings/circuit-breakers.html) — Siemens Energy. Public technical context for switching-device operating references. Circuit-breaker construction and interruption families. The application text and educational graphic are independently authored; the publisher does not certify this representation.

## 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.