Development of Partial Discharge Measurement Method for Pre-mold cable accessories with Separated Shielding Layers

Abstract

Most of the accidents of XLPE cable line are caused by defective constructions of cable accessories. So we developed a method to measure paratial discharges in pre-mold cable accessories. We provided separared shielding layers as detection electorodes in accessories, and discriminate between paratial discharge pulse and noise pulse using realtime comparation of pulse current magnitudes from both de-tection electrodes.
This paper describe the principle of noise discrimination method, portabale paratial discharge mea-surement apparatus, and the result of field test.