Current stage: 40.99 Effective date: Sep 25, 2026
Next stage: DECFDIS Next stage date: Sep 29, 2026
Originator: IEC
Owner: TC 21/SC 21A
Type: International Standard
ICS: 29.220.30
PUBLISHED IEC 61951-1:2017 ED4
PUBLISHED IEC 61951-1:2017/AMD1:2023 ED4
IN_DEVELOPMENT IEC 61951-1 ED5 40.99 Full report circulated: DIS approved for registration as FDIS Sep 25, 2026