IEC 60076-21 ED3

Power transformers - Part 21: Standard requirements, terminology, and test code for step-voltage regulators

Current stage: 20.99 WD approved for registration as CD Feb 27, 2026

Next stage: CD Next stage date : Mar 31, 2026

Originator: IEC

Owner: TC 14

Type: International Standard

ICS: 29.180 Transformers. Reactors

IN_DEVELOPMENT
IEC 60076-21 ED3
20.99 WD approved for registration as CD
Feb 27, 2026