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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

General information

20.99     Oct 31, 2025

CD    Oct 2, 2026

IEC

TC 112

International Standard

Life cycle

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