Measuring The Insulation Resistance Of Epoxy Resin Insulators

Humidity has a great influence on surface leakage current because moisture is absorbed by the insulation surface to form a water film, which will significantly reduce the insulation resistance.
high voltage standoff insulators Deterioration caused by mechanical overload.
Deterioration of hygroscopicity of porcelain parts.
Deterioration of overlapping stresses inside and outside porcelain parts.
Deterioration caused by thermal expansion of porcelain high voltage epoxy.
Deterioration of saturated expansion of cement poured on steel cap.
Deterioration of frozen expansion of cement poured on steel cap.
Deterioration of electrical corrosion of steel cap and steel foot.
epoxy resin insulator Deterioration caused by overvoltage.
high voltage epoxy resin Deterioration caused by internal defects.
Note on measuring high voltage standoff resistance: measurement should be suspended when humidity is high.