Current stage: 20.99 Effective date: 23 jan 2026
Next stage: CD Next stage date: 6 shk 2026
Originator: IEC
Owner: TC 115
Type: Technical Specification
ICS: 29.240.01 03.100.10
IN_DEVELOPMENT IEC TS 62978 ED1 20.99 WD approved for registration as CD 23 jan 2026