# Delta winding connection

Canonical URL: https://eloragrid.ai/symbols/delta-winding-connection
Publisher: Elora Grid
Updated: 2026-10-13
Lookup label: DELTA
Drawing use: SLD, Schematic
Reference families: IEC, Manufacturer

A delta winding connects three phase windings in a closed loop.

## What it represents

A delta winding connects three phase windings in a closed loop. This connection modifier describes topology within a transformer or machine representation and needs matching terminal labels.

## How to read it

- Follow all three winding-to-winding connections before interpreting external line 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

- Label line terminals
- State winding voltage
- Reference complete machine or transformer connection

## Important distinction

A delta connection has no inherent star neutral point.

## Facts

- Drawing role: Three-phase winding
- Representation scope: Functional concept; not an official standard graphic or a product footprint
- 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: Winding arrangements and AC/DC indications](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-3F5A759D-872A-4990-8AAE-7CCAFBBBD4C5.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.