Influence of impulse voltage waveshape on the flashover of clean and particle-contaminated spacers in SF/sub 6/ gas-insulated system

Discharge characteristics of long SF6gas gap with and without insulator in GIS under VFTO and LI

“…Thus, the streamer head near the inner electrode is attracted to the insulator surface. The interaction of the partial arc and insulator will cause damage to the insulator, leaving a dark trace on the insulator surface [18]. The streamer head near the outer electrode is instead pushed away from the insulator surface where insulator damage is less probable.…”