Measurement of Dielectric Breakdown Voltage of Oil Film Using Electrical Wear Test machine

Abstract

In order to measure the dielectric breakdown voltage of the thin oil film, the dynamic electrical wear test machine was designed and developed. It consisted of the rotating steel ring and the steel ball. The gap between the ring and the ball was adjustable at the accuracy of 1μm. With increasing the gap at 50rpm, the dielectric breakdown voltage increased at the rate of about 54V/μm. With increasing the concentration of contaminant or the rotational speed, the dielectric breakdown occurred easily at wider gap or lower voltage.