# Breaker trip-cause indication

Canonical URL: https://eloragrid.ai/symbols/breaker-trip-cause-indication
Publisher: Elora Grid
Updated: 2026-11-03
Lookup label: BTI
Drawing use: Schematic
Reference families: Manufacturer

Representation: Functional block
Installation focus: switchgear
Input: Trip initiations and event time
Output: Trip-cause record

Retains the originating protection or control cause associated with the recorded opening event.

## In plain English

### What this block does

Retains the originating protection or control cause associated with the recorded opening event.

### A simple example

In a switchgear control schematic, the bay controller compares independent status contacts before displaying a position or allowing another operation. The signal labels explain which physical state each contact represents. For this reference, the drawing identifies “Trip initiations and event time” at the input and “Trip-cause record” at the output. Cause indication is distinct from opening confirmation.

### What the drawings help you do

Start at the named input: Trip initiations and event time. Identify its source device or document and the state represented on the drawing. Follow the named output: Trip-cause record. Cross-reference its destination and separate the command from confirmation that the equipment responded.

### Terms

- Input: Trip initiations and event time
- Output: Trip-cause record
- Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.

Concept diagram: Trip initiations and event time → BTI → Trip-cause record
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

Retains the originating protection or control cause associated with the recorded opening event. Breaker status indications describe the operating mechanism, the removable truck or the health of a supporting system. These signals are related but are not interchangeable: an open breaker can still have its truck connected to live bus contacts.
In a switchgear control schematic, the bay controller compares independent status contacts before displaying a position or allowing another operation. The signal labels explain which physical state each contact represents. For this reference, the drawing identifies “Trip initiations and event time” at the input and “Trip-cause record” at the output. Cause indication is distinct from opening confirmation.
Keep contact reference conditions, terminal numbers and interpretation logic together. Distinguish a mechanically operated indication from a measured current or voltage condition. 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: Trip initiations and event time. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Trip-cause record. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Cause indication is distinct from opening confirmation.
- Keep contact reference conditions, terminal numbers and interpretation logic together. Distinguish a mechanically operated indication from a measured current or voltage condition.

## Information to show or reference

- Label the source and connection reference for trip initiations and event time.
- Identify the destination and defined state of trip-cause record.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: Cause indication is distinct from opening confirmation.

## Important distinction

Cause indication is distinct from opening confirmation. 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: Trip initiations and event time
- Output / connection: Trip-cause record
- Lookup label: BTI 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 position and status interfaces. 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.