Current stage: 20.99 Effective date: 12 dhj 2025
Next stage: CD Next stage date: 6 mar 2026
Originator: IEC
Owner: TC 7
Type: International Standard
ICS: 29.240.20 29.060.10
PUBLISHED IEC 61089:1991 ED1
PUBLISHED IEC 62219:2002 ED1
IN_DEVELOPMENT IEC 63559 ED1 20.99 WD approved for registration as CD 12 dhj 2025