Current stage: 30.99 Effective date: Feb 27, 2026
Next stage: TCDV Next stage date: Mar 5, 2027
Originator: IEC
Owner: TC 23
Type: International Standard
ICS: 29.120.99
IN_DEVELOPMENT IEC 61535/AMD1/FRAG1 ED3 30.99 CD approved for registration as DIS Feb 27, 2026