Abstract
This paper describes the effect of barrier shape upon creeping discharge characteristics in SF6, N2 gas and their mixture. The dependency of interelectrode length on the flashover voltage was investigated under the negative pulse voltage. The flashover voltage increased as increasing interelectrode length. However, the flashover voltage characteristics varied greatly with changing barrier shape in N2 gas. In SF6 gas the effects of the barrier shape on interelectrode distance dependence of flashover voltage were hardly found. In order to make clear the effect of the barrier shape on creeping discharge characteristics, we observed the creeping discharge extension images by using an ultra-high speed digital framing camera (IMACON 468).
