Leakage current characteristics at different shed of epoxy resin insulator under rain contaminants

In this paper we present the characteristics of leakage current at different shed of epoxy resin insulator under rain contaminants. The aim of this paper compared the leakage current characteristics under rain contaminant and dry test. Also it compared when used same and different sheds. The tests were conducted at high voltage laboratory with AC high voltage 50 Hz. Leakage current characteristic of 20 kV outdoor insulators with epoxy resin has been investigated under dry and rain contaminant condition. The chamber was used to placing the insulator. The research results showed that the leakage currents characteristics on insulator surface were affected by rain contaminant and form of shed. A minimum leakage current achieved at outdoor insulator without contaminant or dry test conditions. For outdoor insulator under rain contaminant test, the characteristics of leakage current tend to increase. Shed form of insulator influences the characteristics of leakage current also was analyzed.