# Microgrid generator load-dependent start

Canonical URL: https://eloragrid.ai/symbols/microgrid-generator-load-dependent-start
Publisher: Elora Grid
Updated: 2026-11-03
Lookup label: MGLS
Drawing use: Schematic
Reference families: Manufacturer

Representation: Functional block
Installation focus: microgrids
Input: Load and reserve condition
Output: Additional generator start

Requests additional generation when the defined connected-load or reserve condition is reached.

## In plain English

### What this block does

Requests additional generation when the defined connected-load or reserve condition is reached.

### A simple example

In a microgrid power station, the controller can request an additional generator when available reserve falls and later unload a selected machine before its documented stop sequence. For this reference, the drawing identifies “Load and reserve condition” at the input and “Additional generator start” at the output. Start timing and reserve criteria are application-specific.

### What the drawings help you do

Start at the named input: Load and reserve condition. Identify its source device or document and the state represented on the drawing. Follow the named output: Additional generator start. Cross-reference its destination and separate the command from confirmation that the equipment responded.

### Terms

- Input: Load and reserve condition
- Output: Additional generator start
- Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.

Concept diagram: Load and reserve condition → MGLS → Additional generator start
A reading guide. The entry's original illustration and input/output facts describe this application.

- [AGC power management options G4, G5 and G8](https://www.deif.com/media/5a4bx0xv/agc-3-option-g4-g5-and-g8-power-management-4189340696-uk.pdf)


## What it represents

Requests additional generation when the defined connected-load or reserve condition is reached. Generating-set coordination decides which available machines should operate and how their power contribution is shared. Engine starting, breaker connection, load acceptance and stopping are separate stages with their own feedback.
In a microgrid power station, the controller can request an additional generator when available reserve falls and later unload a selected machine before its documented stop sequence. For this reference, the drawing identifies “Load and reserve condition” at the input and “Additional generator start” at the output. Start timing and reserve criteria are application-specific.
Preserve the engine and generator electrical boundaries, command authority and source readiness. Starting duty, minimum loading, synchronising, fuel systems and cooling behavior require the selected generator documentation. 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: Load and reserve condition. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Additional generator start. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Start timing and reserve criteria are application-specific.
- Preserve the engine and generator electrical boundaries, command authority and source readiness. Starting duty, minimum loading, synchronising, fuel systems and cooling behavior require the selected generator documentation.

## Information to show or reference

- Label the source and connection reference for load and reserve condition.
- Identify the destination and defined state of additional generator start.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: Start timing and reserve criteria are application-specific.

## Important distinction

Start timing and reserve criteria are application-specific. 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: Microgrids
- Input / boundary: Load and reserve condition
- Output / connection: Additional generator start
- Lookup label: MGLS is a library lookup label, not a standard device designation.

## Public references

- [AGC power management options G4, G5 and G8](https://www.deif.com/media/5a4bx0xv/agc-3-option-g4-g5-and-g8-power-management-4189340696-uk.pdf) — DEIF. Public technical context for microgrid generating-set coordination. Generator start/stop, load sharing, reserve and power management. 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.