# Breaker ready-to-close aggregation

Canonical URL: https://eloragrid.ai/symbols/breaker-ready-to-close-aggregation
Publisher: Elora Grid
Updated: 2026-11-03
Lookup label: BRA
Drawing use: Schematic
Reference families: Manufacturer

Representation: Functional block
Installation focus: switchgear
Input: Required readiness conditions
Output: Ready-to-close signal

Combines the separately documented mechanism and protection conditions into one readiness indication.

## In plain English

### What this block does

Combines the separately documented mechanism and protection conditions into one readiness indication.

### A simple example

In a switchgear bus-coupler panel, a close request is checked against position, mechanism readiness and the selected live-bus or dead-bus conditions before the closing circuit is enabled. For this reference, the drawing identifies “Required readiness conditions” at the input and “Ready-to-close signal” at the output. Display readiness and coil permission may differ.

### What the drawings help you do

Start at the named input: Required readiness conditions. Identify its source device or document and the state represented on the drawing. Follow the named output: Ready-to-close signal. Cross-reference its destination and separate the command from confirmation that the equipment responded.

### Terms

- Input: Required readiness conditions
- Output: Ready-to-close signal
- Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.

Concept diagram: Required readiness conditions → BRA → Ready-to-close signal
A reading guide. The entry's original illustration and input/output facts describe this application.

- [Masterclad medium-voltage switchgear: circuit-breaker section interlocks](https://productinfo.se.com/masterclad_mv_switchgear_ib/6055-30-masterclad-15kv-mv-switchgear-ib/English/6055-30%20Masterclad%20MV%20Switchgear%20Indoor%20%28bookmap%29_DD00646805.xml/%24/Section6-CircuitBreakerSectionInter-58DD6EC7)


## What it represents

Combines the separately documented mechanism and protection conditions into one readiness indication. A closing circuit combines an operator or automatic request with the conditions that allow the breaker to close. The closing coil releases stored mechanism energy where that construction is used; it is different from the spring-charging motor.
In a switchgear bus-coupler panel, a close request is checked against position, mechanism readiness and the selected live-bus or dead-bus conditions before the closing circuit is enabled. For this reference, the drawing identifies “Required readiness conditions” at the input and “Ready-to-close signal” at the output. Display readiness and coil permission may differ.
Follow request, permission and final coil output as separate signals. A permissive diagram must say which conditions block closing and what happens if a feedback signal becomes unavailable. 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: Required readiness conditions. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Ready-to-close signal. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Display readiness and coil permission may differ.
- Follow request, permission and final coil output as separate signals. A permissive diagram must say which conditions block closing and what happens if a feedback signal becomes unavailable.

## Information to show or reference

- Label the source and connection reference for required readiness conditions.
- Identify the destination and defined state of ready-to-close signal.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: Display readiness and coil permission may differ.

## Important distinction

Display readiness and coil permission may differ. 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: Required readiness conditions
- Output / connection: Ready-to-close signal
- Lookup label: BRA is a library lookup label, not a standard device designation.

## Public references

- [Masterclad medium-voltage switchgear: circuit-breaker section interlocks](https://productinfo.se.com/masterclad_mv_switchgear_ib/6055-30-masterclad-15kv-mv-switchgear-ib/English/6055-30%20Masterclad%20MV%20Switchgear%20Indoor%20%28bookmap%29_DD00646805.xml/%24/Section6-CircuitBreakerSectionInter-58DD6EC7) — Schneider Electric. Public technical context for breaker closing controls. Breaker control, mechanism, position contacts, racking interlocks and test interfaces. 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.