# Transformer-fed indicator lamp

Canonical URL: https://eloragrid.ai/symbols/transformer-fed-indicator-lamp
Publisher: Elora Grid
Updated: 2026-10-13
Lookup label: LAMP TX
Drawing use: Schematic
Reference families: IEC, Manufacturer

A transformer-fed indicator lamp includes a documented internal voltage-conversion arrangement.

## What it represents

A transformer-fed indicator lamp includes a documented internal voltage-conversion arrangement. Its supply terminals and lamp indication are shown according to the selected assembly.

## How to read it

- Use the assembly input rating rather than the internal lamp voltage as the wiring supply requirement.
- The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation.

## Information to show or reference

- State input voltage
- Name indicated condition
- Reference assembly terminals

## Important distinction

A built-in lamp transformer is different from a separately drawn panel control transformer.

## Facts

- Drawing role: Visual signal
- Representation scope: Functional concept; not an official standard graphic or a product footprint
- Public vendor block reference: HLT1H23A, VLT1H23A (Autodesk identifiers; not IEC symbol numbers)
- Identifier status: The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name.

## Public references

- [AutoCAD Electrical: Transformer-fed indicator lamps](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-CCA59550-27D3-4BC0-B576-617C8934EC2B.htm) — Autodesk. Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.

## 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.