Current stage: 30.99 Effective date: Jun 6, 2025
Next stage: TCDV Next stage date: Jun 30, 2025
Originator: IEC
Owner: TC 47
Type: International Standard
ICS: 31.080.99
IN_DEVELOPMENT IEC 63550-4 ED1 30.99 CD approved for registration as DIS Jun 6, 2025