IEC TR 63646 ED1

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

Current stage: 50.00 Final text received or FDIS registered for formal approval Jul 1, 2026

Next stage: CDTR Next stage date : Aug 26, 2026

Originator: IEC

Owner: TC 10

Type: Technical Report

ICS: 29.040.10 Insulating oils

IN_DEVELOPMENT
IEC TR 63646 ED1
50.00 Final text received or FDIS registered for formal approval
Jul 1, 2026