Solid investigation in oil barrier dielectric under non-uniform electric field

Abstract

This paper presents the dielectric barrier breakdown test in transformer oil which is between electrodes in point - point and point - plate types. Polyvinyl Chloride hard (PVC), Ply methyl meth cry late (PMMA), glass, and wood were used as solid insulator with thickness of 2.0 mm. The results of the experiment showed that, in the case of point-point electrode type, PVC can withstand the breakdown voltage up to 205 kV. Whereas, point-plate electrode type, it can withstand the breakdown voltage up to 183.5 kV due to different electrode types. Consequently, the voltage and electric field of these two types are different. The insulator materials - PMMA, glass, wood, transformer oil and air can withstand lower breakdown voltage, respectively. This experiment leads to design the solid insulator which is effectively capable to use in high voltage equipments with the transformer oil as insulation.