# Spring-charged closing permissive

Canonical URL: https://eloragrid.ai/symbols/spring-charged-closing-permissive
Publisher: Elora Grid
Updated: 2026-11-03
Lookup label: SCP
Drawing use: Schematic
Reference families: Manufacturer

Representation: Functional block
Installation focus: switchgear
Input: Spring-ready contact
Output: Closing permission

Allows the closing path only when the stored-energy mechanism reports ready.

## In plain English

### What this block does

Allows the closing path only when the stored-energy mechanism reports ready.

### 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 “Spring-ready contact” at the input and “Closing permission” at the output. Mechanical readiness is not a synchronism check.

### What the drawings help you do

Start at the named input: Spring-ready contact. Identify its source device or document and the state represented on the drawing. Follow the named output: Closing permission. Cross-reference its destination and separate the command from confirmation that the equipment responded.

### Terms

- Input: Spring-ready contact
- Output: Closing permission
- Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.

Concept diagram: Spring-ready contact → SCP → Closing permission
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

Allows the closing path only when the stored-energy mechanism reports ready. 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 “Spring-ready contact” at the input and “Closing permission” at the output. Mechanical readiness is not a synchronism check.
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: Spring-ready contact. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Closing permission. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Mechanical readiness is not a synchronism check.
- 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 spring-ready contact.
- Identify the destination and defined state of closing permission.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: Mechanical readiness is not a synchronism check.

## Important distinction

Mechanical readiness is not a synchronism check. 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: Spring-ready contact
- Output / connection: Closing permission
- Lookup label: SCP 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.