# Magnetically latched operating mechanism reference

Canonical URL: https://eloragrid.ai/symbols/magnetically-latched-operating-mechanism-reference
Publisher: Elora Grid
Updated: 2026-11-03
Lookup label: MLOMR
Drawing use: Schematic
Reference families: Manufacturer

Representation: Functional block
Installation focus: switchgear
Input: Operating release input
Output: Latched mechanism movement

Identifies an operating mechanism that uses the documented magnetic latching construction.

## In plain English

### What this block does

Identifies an operating mechanism that uses the documented magnetic latching construction.

### A simple example

In a medium-voltage switchgear drawing, the operating reference helps the reader distinguish the interrupting device from its isolation, earthing and auxiliary-control interfaces. For this reference, the drawing identifies “Operating release input” at the input and “Latched mechanism movement” at the output. Coil polarity and energy depend on the equipment.

### What the drawings help you do

Start at the named input: Operating release input. Identify its source device or document and the state represented on the drawing. Follow the named output: Latched mechanism movement. Cross-reference its destination and separate the command from confirmation that the equipment responded.

### Terms

- Input: Operating release input
- Output: Latched mechanism movement
- Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.

Concept diagram: Operating release input → MLOMR → Latched mechanism movement
A reading guide. The entry's original illustration and input/output facts describe this application.

- [High-voltage circuit breakers](https://www.siemens-energy.com/global/en/home/products-services/product-offerings/circuit-breakers.html)


## What it represents

Identifies an operating mechanism that uses the documented magnetic latching construction. A switching-device operating reference adds the specific mechanism or duty context needed to interpret its place in a power circuit. The same basic switching outline can serve different equipment constructions, so the added description must remain attached to its device tag.
In a medium-voltage switchgear drawing, the operating reference helps the reader distinguish the interrupting device from its isolation, earthing and auxiliary-control interfaces. For this reference, the drawing identifies “Operating release input” at the input and “Latched mechanism movement” at the output. Coil polarity and energy depend on the equipment.
Use the device schedule for its actual construction, operating duty and ratings. These original functional illustrations describe the named role and do not certify a standard glyph or product footprint. 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: Operating release input. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Latched mechanism movement. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Coil polarity and energy depend on the equipment.
- Use the device schedule for its actual construction, operating duty and ratings. These original functional illustrations describe the named role and do not certify a standard glyph or product footprint.

## Information to show or reference

- Label the source and connection reference for operating release input.
- Identify the destination and defined state of latched mechanism movement.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: Coil polarity and energy depend on the equipment.

## Important distinction

Coil polarity and energy depend on the equipment. 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: Operating release input
- Output / connection: Latched mechanism movement
- Lookup label: MLOMR is a library lookup label, not a standard device designation.

## Public references

- [High-voltage circuit breakers](https://www.siemens-energy.com/global/en/home/products-services/product-offerings/circuit-breakers.html) — Siemens Energy. Public technical context for switching-device operating references. Circuit-breaker construction and interruption families. 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.