Current stage: 40.00 Effective date: Feb 27, 2026
Next stage: CCDV Next stage date: Apr 17, 2026
Originator: IEC
Owner: TC 34
Type: International Standard
ICS: 29.140.01 29.140.99
IN_DEVELOPMENT IEC 63640 ED1 40.00 DIS registered Feb 27, 2026