Comparing the Dielectric Properties of Papaya Oil with Mineral Insulating Liquid under Temperature Variation

Abstract

The world’s energy requisite has been controlled by petroleum oil for a long
time in transportation, household and power sectors. Mineral Transformation Oil (MTO),
being an essential insulating material in transformers, has been used for over fifteen
decades. MTO application in the power sector could be hazardous to the environment,
especially during a transformer explosion which may cause a spill of oil to the soil or water
stream. Owing to the threat of MTO to environment aspects, alternative insulating oil with
biodegradable characteristics has attracted a lot of devotions in recent studies. To validate
the aptness of using Purified Papaya Seed Oil (PPSO) as an insulating fluid in an electric
transformer, it is vital to compare dielectric properties of PPSO with that of MTO
insulating liquid. This study presents a comparison of temperatur e effect on dielectric
properties of PPSO with the MTO insulating liquid. Breakdown voltage, dissipation factor
(tan δ) and dielectric constant were measured by existing established testing standards. The
breakdown voltage was determined by IEC 156 standard test method, whereas the
dissipation factor and dielectric constant were determined based on IEC 60247 standard
test method. The results revealed that the variation of dielectric properties of PPSO due to
temperature change was similar to that of MTO. However, the dissipation factors and
breakdown voltages of dielectric properties of PPSO were better when compared with
those of MTO at higher temperatures, but with a slight decrease in dielectric constants with
the increase in temperature.

Keywords: Papaya seed oil, Dissipation factor, Dielectric constant, Breakdown voltage,
Temperature, Transformer.

PACS: 77.84. Nh, 88.05. Lg.