# Auxiliary-board load-shedding input

Canonical URL: https://eloragrid.ai/symbols/auxiliary-board-load-shedding-input
Publisher: Elora Grid
Updated: 2026-11-03
Lookup label: ALI
Drawing use: Schematic
Reference families: Manufacturer

Representation: Functional block
Installation focus: switchrooms
Input: Load-shedding command
Output: Assigned auxiliary-load disconnection

Receives the command to disconnect the room loads selected by the load-priority scheme.

## In plain English

### What this block does

Receives the command to disconnect the room loads selected by the load-priority scheme.

### A simple example

In a switchroom, the lighting, service sockets, charger input and room cooling may be fed from different auxiliary branches. A source change must preserve the identities of loads that require continuity. For this reference, the drawing identifies “Load-shedding command” at the input and “Assigned auxiliary-load disconnection” at the output. The essential-load definition governs exclusions.

### What the drawings help you do

Start at the named input: Load-shedding command. Identify its source device or document and the state represented on the drawing. Follow the named output: Assigned auxiliary-load disconnection. Cross-reference its destination and separate the command from confirmation that the equipment responded.

### Terms

- Input: Load-shedding command
- Output: Assigned auxiliary-load disconnection
- Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.

Concept diagram: Load-shedding command → ALI → Assigned auxiliary-load disconnection
A reading guide. The entry's original illustration and input/output facts describe this application.

- [SEL-RPM redundant power module](https://selinc.com/products/RPM/)


## What it represents

Receives the command to disconnect the room loads selected by the load-priority scheme. An auxiliary AC distribution diagram identifies the supplies serving room services and control-support equipment. Essential, backed-up and ordinary circuits can have different source paths and operating priorities.
In a switchroom, the lighting, service sockets, charger input and room cooling may be fed from different auxiliary branches. A source change must preserve the identities of loads that require continuity. For this reference, the drawing identifies “Load-shedding command” at the input and “Assigned auxiliary-load disconnection” at the output. The essential-load definition governs exclusions.
Label source, branch protection and load purpose. The arrangement does not establish conductor sizes, protection settings or installation compliance; it links the operating role to the selected equipment schedule. 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-shedding command. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Assigned auxiliary-load disconnection. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- The essential-load definition governs exclusions.
- Label source, branch protection and load purpose. The arrangement does not establish conductor sizes, protection settings or installation compliance; it links the operating role to the selected equipment schedule.

## Information to show or reference

- Label the source and connection reference for load-shedding command.
- Identify the destination and defined state of assigned auxiliary-load disconnection.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: The essential-load definition governs exclusions.

## Important distinction

The essential-load definition governs exclusions. 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: Switchrooms
- Input / boundary: Load-shedding command
- Output / connection: Assigned auxiliary-load disconnection
- Lookup label: ALI is a library lookup label, not a standard device designation.

## Public references

- [SEL-RPM redundant power module](https://selinc.com/products/RPM/) — SEL. Public technical context for switchroom auxiliary ac distribution. Independent AC and DC sources for station auxiliary power. 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.