Surf Wiki
Save to docs
general/electric-transformers

From Surf Wiki (app.surf) — the open knowledge base

Delta–wye transformer

3-phase electric power transformer design

Delta–wye transformer
Summary

3-phase electric power transformer design

Delta–wye transformer, primary to secondary.

A delta–wye transformer (Δ–Y transformer) is a type of three-phase electric power transformer design that employs delta-connected windings on its primary and wye/star connected windings on its secondary. A neutral wire can be provided on wye output side. It can be a single three-phase transformer, or built from three independent single-phase units. An equivalent term is delta–star transformer.

Transformers

fix-attempted=yes }}</ref>

Delta–wye transformers are common in commercial, industrial, and high-density residential locations, to supply three-phase distribution systems.

An example would be a distribution transformer with a delta primary, running on three 11 kilovolt phases with no neutral or earth required, and a star (or wye) secondary providing a 3-phase supply at 415 V, with the domestic voltage of 240 V available between each phase and the earthed (grounded) neutral point.

The delta winding allows third-harmonic currents to circulate within the transformer, and prevents third-harmonic currents from flowing in the supply line.

Delta–wye transformers introduce a 30, 150, 210, or 330 degree phase shift. Thus they cannot be paralleled with wye–wye (or delta–delta) transformers. However, they can be paralleled with identical configurations and some different configurations of other delta–wye (or wye–delta with some attention) transformers.

References

References

  1. (November 2019). "Annex D - Three-phase transformer connections". IEC.
  2. ''Electrical Transmission and Distribution Reference Book'', Westinghouse Electric Corporation, 1964, Chapter 5, table 15.
  3. (November 2019). "IEC Standard 60076-1 Edition 2:1993 consolidated with amendment 1:1999". IEC.
Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

electric-transformers three-phase-ac-power
Want to explore this topic further?

Ask Mako anything about Delta–wye transformer — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report