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prSSH EN IEC 62770:2025

Fluids for electrotechnical applications - Unused natural esters for transformers and similar electrical equipment

General information

10.00     Nov 19, 2025

DPS

DPS/KT 3

European Norm

29.040.01  

Scope

IEC 62770:2024 describes specifications and test methods for unused natural esters in transformers and similar liquid-immersed electrical equipment in which a liquid is required as an insulating and heat transfer medium. The exposure of natural ester to air leads to deterioration of the insulating liquid. Use of natural esters is therefore restricted to sealed units, or with the conservator tank protected from the contact with atmosphere by a membrane or other suitable system.

Life cycle

PREVIOUSLY

PUBLISHED
SSH EN 62770:2014

NOW

IN_DEVELOPMENT
prSSH EN IEC 62770:2025
10.00 Proposal for new project registered
Nov 19, 2025

Related project

Adopted from EN IEC 62770:2024 IDENTICAL

Adopted from IEC 62770:2024 ED2 IDENTICAL