High Voltage Epoxy Resin Insulator Wet Flashover Voltage Is High

The hydrophobicity of the low-energy surface of organic composite materials is the main reason for the excellent wet dirt resistance of composite high voltage standoff insulators. Under severe meteorological conditions such as heavy fog, light rain, dew, melting snow, melting ice, etc., separate water drops are formed on the surface of composite high voltage epoxy instead of continuous water film, and the conductivity of the dirt layer is very low, so the leakage current of epoxy resin insulator is also very small, and it is not easy to have strong local arcs, and local arcs are also difficult to further develop and cause external insulation flashover. After a period of operation, after the surface of composite high voltage epoxy resin is polluted, the hydrophobicity can migrate to the surface of the dirt layer. This is a unique feature of silicone rubber materials. Under the same degree of dirtiness, its pollution flashover voltage can reach more than twice the same leakage distance high voltage standoff.