Test Methods Useful in Determining the Wet Voltage Capability of Polymer Insulator Systems after Lime Related Outdoor Exposures

The use of an HV fog chamber in conjunction with a variety of environmental exposures to study degradation in the surface properties of polymer systems and how this affects wet electrical insulation is dealt with. Emphasis is placed on studying the conditions for leakage current inception and further current development leading to a flashover condition. The relationship between surface current, time, and voltage are plotted graphically and discussed.