Surface Charge Accumulation of DC-GIS Spacer

——Investigation of Surface Charge Saturation Tendency by Applying Voltage for 10000 Hours——

Abstract

Surface charge accumulation phenomena on insulating epoxy spacer are measured under DC-GIS simulated environment. Homo-charges are accumulated near the electrodes, and charge injection from the electrodes is assumed to be dominant in surface charge accumulation. The surface charge is saturated at a time constant of 1000 hours below 20°C, and the saturated charge amount tends to increase with room temperature rising.