Breakdown voltage and resistivity of MO and RBDPO mixture as potential liquid insulation at ambient temperature of transformers / Yusnida Mohd Yusof, Ahmad Farid Abidin and Mohd Abdul Talib Mat Yusoh

The paper presents an investigation based on an experimental work of the dielectric behaviour for transformer oil with palm oil at different mixture and temperature. The basic properties of transformers mineral insulating oil should be introduced to have a better understanding of dielectric strength of oil mixture. The author has highlighted oil resistivity and breakdown voltage (BDV) during the experimental work of Deodorized Palm Oil (RBDPO) mixed with transformer oil namely mineral oil (MO) at 40°C to 60°C. Testing was made at 40°C to 60°C according to IEC 156 standard by using AC Modul System circuit of Hi volt Power Diagnostic and Mega Ohm 1KV 3005A megger was used to evaluate the resistivity. The highest breakdown strength is achieved 44kv at 80% of RBDPO content. The result of resistivity that was influenced by temperature also presented.