The Influence of Corona Intensity on the TSC of HTV Silicone Rubber

In this paper, the influence of corona intensity on the TSC characteristics of HTV silicone rubber was investigated. Five levels of corona voltage were employed to deteriorate the samples respectively. The TSC was measured for the samples exposure different deteriorating duration. Experimental results show that the variation trend of TSC curves with the corona intensity is not identical at different deteriorating period. During the whole deterioration progress, the peak value of TSC gradually increases with the improvement of corona voltage. The temperature corresponded to TSC peak, however, becomes higher only when the corona voltage is elevated to a certain value at given corona deterioration period. Along with the prolonging of deterioration duration, the greater the corona intensity, the higher the temperature corresponded to TSC peak. The calculated traps parameters reveal that the trap energy level would not be deepened by strengthen of corona intensity. The reason was analyzed in this paper considering the microstructure variation.