# Adjustable-ratio transformer

Canonical URL: https://eloragrid.ai/symbols/adjustable-ratio-transformer
Publisher: Elora Grid
Updated: 2026-10-13
Lookup label: TX ADJ
Drawing use: SLD, Schematic
Reference families: IEC, Manufacturer

An adjustable-ratio transformer includes a documented means of varying its voltage ratio.

## What it represents

An adjustable-ratio transformer includes a documented means of varying its voltage ratio. The functional drawing should identify the adjustment or tap connection without assuming on-load operation.

## How to read it

- Establish whether changes are permitted energised or only under the manufacturer's off-circuit conditions.
- 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

- Record adjustment range
- Identify operating mechanism
- Reference tap-position notation

## Important distinction

Adjustable ratio does not automatically imply an on-load tap changer.

## Facts

- Drawing role: Winding connection
- Representation scope: Functional concept; not an official standard graphic or a product footprint
- Public vendor block reference: HXF1T5, VXF1T5 (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

- [Power, potential and autotransformer symbols](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-C1FE1690-DBF4-4F69-85C4-28E41F0A6392.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.