This study aims to analyze the dielectric characteristics of blended vegetable oils as an alternative liquid insulation to replace mineral oil in power transformers. The samples used were canola oil (CO), rice bran oil (RBO), and groundnut oil (GO), blended at ratios of 20:80, 40:60, and 50:50 for both RBO:CO and GO:CO mixtures. The dielectric dissipation factor (tan δ) and breakdown voltage w…