Vegetable-based insulating oil can be used as an alternative to insulating oil, one of which is palm oil mill effluent. Research on POME oil is still minimal, so it is necessary to carry out Flash Point, BDV, Tan Delta tests to find out the results of the oil characteristic tests. The results of the Flash Point (°C) test with the addition of nano silica of 0%, 0.03%, 0.08% and 0.13% were 150,1…