Statistical Analysis of AC Breakdown Voltages in Persea Americana Oil,Mineral Insulation oil and their Mixtures

Abstract

This paper reports on a comparative study of statistical Breakdown Voltage (BDV) in Persea americana oil (PAO) and mineral insulation oil (MIO) and their respective mixtures. Two types of PAO are tested, that is extra virgin Persea americana oil (EVPAO) and refined Persea americana oil (RPAO). PAO and MIO and the oil mixtures (namely 50%RPAO+50%MIO and 50%EVPAO+50%MIO) are subjected to AC voltages. At least ten tests were carried out for each as per IEEE guide for the statistical analysis of electrical insulation breakdown data (IEEE 930 or IEC 62539). It is shown that the average AC breakdown voltage of RPAO is higher than that of MIO. It also observed that AC mean breakdown voltage of RPAO is higher than that of oils mixture (50%RPAO+50%MIO) and MIO. (50%RPAO+50%MIO) BDV is higher than that of MIO. AC mean breakdown voltage of EVPAO and MIO mixture is the lowest one. Thus PAO constitutes a potential liquid for replacing mineral oil in high voltage equipment. Keywords— Breakdown voltage, Statistical analysis, Persea americana oil (PAO), mineral insulation oil (MIO), PAO/MO mixtures, Refined Persea americana oil (RPAO).