Current stage: 30.99 Effective date: Mar 13, 2026
Next stage: TCDV Next stage date: May 1, 2026
Originator: IEC
Owner: TC 47
Type: International Standard
ICS: 31.080.99
IN_DEVELOPMENT IEC 63551-6 ED1 30.99 CD approved for registration as DIS Mar 13, 2026