Abstract

This paper describes the relation between interelectrode resistance and inception voltages of scintillation discharges on wet and polluted surfaces of organic insulating materials. Three different sorts of plate specimens were used for the test. The inception voltages were measured under several conditions such as specimen sizes, concentrations of electrolytic solution and applied voltp.ges. l Scintillation inception voltages are mainly determined by the resistance over electrodes. The inception voltages rise with increase in width of the specimen, are low when the width of the two ends of the specimens is different. They are lower for direct voltage than for alternating voltage. These phenomena are discussed from the view~oint of temperature rise brought about by the current in the pollution layer and thennal properties of the insulating materials.

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