Addition of inorganic fillers for resin Epoxy helps to improve the electrical properties of polymer insulation materials, according to the percentage of filler concentrations and filler types. Experiments and measurements have been performed to study and analyze the flashover voltage of Epoxy with Magnesium hydroxide, Silica and Mica fillers with variety of samples lengths at different weather conditions. These measurements also aimed to improve the electrical properties in addition to maximize the flash overvoltage. Flashover voltage value at dry condition for resin Epoxy was 41.97kV at 25mm sample length. Epoxy with Silica filler at 50wt% concentration reached 49.84kV and this value is the greatest flashover voltage at the same sample length. The flashover voltage for resin Epoxy samples takes the same trend for than that of Epoxy with mica filler samples. The results of flashover voltage for samples of Epoxy with Magnesium hydroxide resulted in lowest values than other samples.
