Current stage: 20.99 Effective date: 8 mar 2024
Next stage: CD Next stage date: 30 tet 2025
Originator: IEC
Owner: TC 22/SC 22E
Type: Technical Specification
ICS: 29.200
IN_DEVELOPMENT IEC TS 63557 ED1 20.99 WD approved for registration as CD 8 mar 2024