Current stage: 20.99 Effective date: 6 mar 2026
Next stage: CD Next stage date: 1 pri 2026
Originator: IEC
Owner: TC 65
Type: International Standard
ICS: 25.040.40 01.080.40
IN_DEVELOPMENT IEC 63131-3 ED1 20.99 WD approved for registration as CD 6 mar 2026