# Test-link normal-position supervision

Canonical URL: https://eloragrid.ai/symbols/test-link-normal-position-supervision
Publisher: Elora Grid
Updated: 2026-11-03
Lookup label: TNS
Drawing use: Schematic
Reference families: Manufacturer

Representation: Functional block
Installation focus: switchgear
Input: Test-link status contacts
Output: Normal-position indication

Reports whether the selected test links have returned to their documented service positions.

## In plain English

### What this block does

Reports whether the selected test links have returned to their documented service positions.

### A simple example

In a switchgear relay panel, test links can separate a protective relay from the trip coils while maintaining the specified current-transformer secondary arrangement. For this reference, the drawing identifies “Test-link status contacts” at the input and “Normal-position indication” at the output. A healthy indication does not certify completed commissioning.

### What the drawings help you do

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

### Terms

- Input: Test-link status contacts
- Output: Normal-position indication
- Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.

Concept diagram: Test-link status contacts → TNS → Normal-position 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

Reports whether the selected test links have returned to their documented service positions. A test interface separates measurement, command and indication paths so their behavior can be checked in the documented test configuration. The test boundary must show which real equipment outputs remain enabled.
In a switchgear relay panel, test links can separate a protective relay from the trip coils while maintaining the specified current-transformer secondary arrangement. For this reference, the drawing identifies “Test-link status contacts” at the input and “Normal-position indication” at the output. A healthy indication does not certify completed commissioning.
Trace the source and destination on each side of the test boundary. Use the selected test-device instructions for actual operations and never infer a safe current-transformer switching sequence from an educational diagram. 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: Test-link status contacts. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Normal-position indication. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- A healthy indication does not certify completed commissioning.
- Trace the source and destination on each side of the test boundary. Use the selected test-device instructions for actual operations and never infer a safe current-transformer switching sequence from an educational diagram.

## Information to show or reference

- Label the source and connection reference for test-link status contacts.
- Identify the destination and defined state of normal-position indication.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: A healthy indication does not certify completed commissioning.

## Important distinction

A healthy indication does not certify completed commissioning. 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: Test-link status contacts
- Output / connection: Normal-position indication
- Lookup label: TNS 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 switchgear test and commissioning 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.