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EVS-EN IEC 62770:2024

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

General information

Valid from 02.12.2024
Base Documents
IEC 62770:2024; EN IEC 62770:2024
Directives or regulations
None

Standard history

Status
Date
Type
Name
02.12.2024
Main
05.06.2014
Main
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.

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