Current stage: 20.99 Effective date: Aug 15, 2025
Next stage: CD Next stage date: Jan 23, 2026
Originator: IEC
Owner: TC 47/SC 47F
Type: International Standard
ICS: 31.080.99
IN_DEVELOPMENT IEC 62047-57 ED1 20.99 WD approved for registration as CD Aug 15, 2025