PARTIAL DISCHARGE MEASUREMENT AS A DIAGNOSTIC TOOL FOR CURRENT TRANSFORMER

Current Transformer (CT) is used for protection of major components and to provide reliable operation in power system. Failure of a CT may cause incorrect current signals and lead to loss of supply. Therefore, insulation diagnosis is of great importance for evaluation of CT. To ensure economic operation of high voltage current transformer reliable condition evaluation concepts are essential. It is important to know the degradation of insulation materials for the study of partial discharge behavior in CT. In this article, partial discharge phenomenon has been discussed, along with different partial discharge detection methods. The application of partial discharge data for the diagnosis of insulation in high voltage current transformer is discussed.