INVESTIGATION OF FLASHOVER VOLTAGE FOR EPOXY COMPOSITES FILLED WITH VARIOUS FILLERS
Minerals fillers such as Magnesium Oxide (MgO), Alumina Trihydrate (ATH), Calcium Carbonate (CaCo3), and Silica (SiO2) were used to produce epoxy composite for high and medium voltage in electrical application. Effects of types and percentage weight of filler on flashover voltage properties of epoxy resin were determined. Cylindrical rod epoxy samples with different lengths (10, 20, and 30mm) and filler types have been prepared, these fillers with 30% percentage loading of epoxy samples by weight. Flashover voltage of composite material was measured under various environmental conditions, to check the accuracy the test was carried out for five times on each sample under the same condition. Results showed that flashover voltage of composite improved with epoxy/ATH filler at all lengths and conditions, also flashover voltage for samples in dry condition is higher than samples with other conditions at all filler and lengths.
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