Relation between leakage current and NSDD on the surface of polymer insulator

This paper describes relation between leakage current and non solubility deposits density (NSDD) on the surface of a polymer insulator. Until now, we have studied outdoor polymer insulators in the coastal region in west Japan. In addition we proposed a novel on-line monitoring system, adopting differential techniques to separate the leakage current of outdoor polymer insulators into three components such as a conductive current, a corona discharge and a dry band arc discharge current. The results indicated that leakage current was influenced by NSDD rather than equipment solubility deposits density (ESDD). In this study, the test to clarity the above stated factor was performed.