Abstract

This study deals with pre-shutdown test system in AC withstand voltage test for XLPE power cable, which is able to minimize electrical damage enough to investigate source of defects with naked eye when electrical breakdown is happened. Principle of this system is based on high speed shutdown of the test voltage just before the electrical breakdown by PBD system combined with time domain reflection (TDR) method of partial discharge. By experiments with model cables having artificial defects, its working abilities, such as shutdown speed and accuracy as well as operating condition were investigated. Through the test result of power cables with unknown defect, it was proven that this pre- shutdown AC voltage test system was successfully worked in the AC voltage test for power cable.

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