EFFECT OF RIBS ON SURFACE DISCHARGE IN SF6 GAS

ABSTRACT Cylindrical post spacers were used to investigate fundamental effects of ribs on particle-initiated breakdown characteristics. The Improvement in breakdown characteristics, obtained by attaching the ribs, changed with the distance between them. The shorter the distance was, the higher the breakdown voltage. When the distance was less than 20 to 30% of the spacer length, the breakdown voltage increased 20 to 60%.