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IEC TR 63646 ED1

Guideline for retrofilling mineral oil immersed transformers up to 72,5 kV with ester-based insulating liquids

General information

40.99     Feb 13, 2026

TDTR    May 29, 2026

IEC

TC 10

Technical Report

29.040.10  

Life cycle

NOW

IN_DEVELOPMENT
IEC TR 63646 ED1
40.99 Full report circulated: DIS approved for registration as FDIS
Feb 13, 2026