Analysis of Dielectric Strength of Virgin Coconut Oil as an Alternative Transformer Liquid insulation

Abstract

This paper presents the experimental results of a study, which has been carried out to analyze dielectric strength of virgin coconut oil in order to check the suitability as liquid insulation in power transformers.In this study dielectric strength response measurements after five times breakdown voltage test both mushroom electrode and spherical electrode slightly decreased, but the value of breakdown voltage is still high enough. While the measurement of the water content decrease is not stable, viscosity increase almost linear, the same thing also happened linear increase in measurement of flash point.