# Breaker intermediate-position indication

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

Representation: Functional block
Installation focus: switchgear
Input: Incomplete position combination
Output: Intermediate-state indication

Identifies the temporary or unresolved state between the defined open and closed indications.

## In plain English

### What this block does

Identifies the temporary or unresolved state between the defined open and closed indications.

### 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 “Incomplete position combination” at the input and “Intermediate-state indication” at the output. An intermediate state is not a stable open indication.

### What the drawings help you do

Start at the named input: Incomplete position combination. Identify its source device or document and the state represented on the drawing. Follow the named output: Intermediate-state indication. Cross-reference its destination and separate the command from confirmation that the equipment responded.

### Terms

- Input: Incomplete position combination
- Output: Intermediate-state indication
- Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.

Concept diagram: Incomplete position combination → BII → Intermediate-state indication
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

Identifies the temporary or unresolved state between the defined open and closed indications. 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 “Incomplete position combination” at the input and “Intermediate-state indication” at the output. An intermediate state is not a stable open indication.
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: Incomplete position combination. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Intermediate-state indication. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- An intermediate state is not a stable open indication.
- 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 incomplete position combination.
- Identify the destination and defined state of intermediate-state indication.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: An intermediate state is not a stable open indication.

## Important distinction

An intermediate state is not a stable open indication. 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: Incomplete position combination
- Output / connection: Intermediate-state indication
- Lookup label: BII 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.