IEC 61857-51 ED1

Electrical insulation systems - Procedures for thermal evaluation - Part 51: Specific requirements for electrical insulation systems in dry-type resin-encapsulated high-voltage windings using AC dielectric breakdown as diagnostic

Current stage: 20.99 WD approved for registration as CD Oct 31, 2025

Next stage: CD Next stage date : Oct 2, 2026

Originator: IEC

Owner: TC 112

Type: International Standard

IN_DEVELOPMENT
IEC 61857-51 ED1
20.99 WD approved for registration as CD
Oct 31, 2025