# Adjustable-core inductor

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

An adjustable-core inductor varies its documented inductive characteristic through a magnetic adjustment.

## What it represents

An adjustable-core inductor varies its documented inductive characteristic through a magnetic adjustment. Its permissible range and adjustment method require equipment information.

## How to read it

- Separate the adjustment mechanism from the electrical winding terminals.
- 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 adjustment range
- Show winding connections
- Reference adjustment instructions

## Important distinction

Adjustable inductance is not an on/off switching function.

## Facts

- Drawing role: Inductive component
- Representation scope: Functional concept; not an official standard graphic or a product footprint
- Public vendor block reference: HRT1L4, VRT1L4 (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: Reactors and inductors](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-BAD50DBF-0951-44A0-BB4C-A57B4A4ED895.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.