Current stage: 40.99 Effective date: Oct 30, 2026
Next stage: RDTS Next stage date: Mar 31, 2027
Originator: IEC
Owner: TC 87
Type: Technical Specification
ICS: 17.140.50
IN_DEVELOPMENT IEC TS 63587 ED1 40.99 Full report circulated: DIS approved for registration as FDIS Oct 30, 2026