Current stage: 30.99 Effective date: 5 qer 2026
Next stage: TCDV Next stage date: 31 gush 2026
Originator: IEC
Owner: TC 125
Type: International Standard
ICS: 43.120
IN_DEVELOPMENT IEC 63281-5-1 ED1 30.99 CD approved for registration as DIS 5 qer 2026