Current stage: 30.99 Effective date: Nov 6, 2026
Next stage: TCDV Next stage date: Jan 31, 2027
Originator: IEC
Owner: TC 47
Type: International Standard
ICS: 31.080.99
IN_DEVELOPMENT IEC 63551-2 ED1 30.99 CD approved for registration as DIS Nov 6, 2026