IEC 61203 ED2

Synthetic organic esters - Guidelines for maintenance and use in electrical equipment

Scope

IEC 61203 ED2 provides procedures and supervision for the use and maintenance of synthetic esters in transformers and other electrical equipment.
IEC 61203 ED2 is applicable to synthetic esters, originally supplied conforming to IEC 61099 and other applicable standards in transformers, switchgear and electrical apparatus where liquid sampling is practical and where the normal operating conditions specified in the equipment specifications apply.
IEC 61203 ED2 is also intended to assist the power equipment operator in evaluating the condition of the synthetic ester and in maintaining it in a serviceable condition. It also provides a common basis for the preparation of more specific and complete local codes of practice.
IEC 61203 ED2 includes recommendations on tests and evaluation procedures and outlines methods for reconditioning and reclaiming the liquid, when necessary.