Current stage: 20.99 Effective date: Jun 18, 2026
Next stage: CD Next stage date: Nov 30, 2026
Originator: IEC
Owner: TC 57
Type: International Standard
ICS: 33.200
PUBLISHED IEC 61850-4:2011 ED2
PUBLISHED IEC 61850-4:2011/AMD1:2020 ED2
IN_DEVELOPMENT IEC 61850-4 ED3 20.99 WD approved for registration as CD Jun 18, 2026