Title :
Barrier effects of surface discharge propagation in SF6 gas
Author :
Inui, A. ; Yamada, S. ; Taniguchi, Y. ; Murase, H. ; Teranishi, T. ; Ohshima, I.
Author_Institution :
Toshiba Corp., Kawasaki, Japan
Abstract :
The effects of a barrier with PET film on surface discharges in a composite insulating system in SF6 gas were investigated. The relationship between surface discharge propagation characteristics and the protection effect of barriers was clarified. If a barrier has a right-angle bottom, the positive breakdown voltages are higher but the negative breakdown voltages remain unchanged. If a barrier having a bottom is installed near the high-voltage electrode, positive breakdown voltages are higher under a higher gas pressure, but are nearly the same under a lower gas pressure as without a barrier. If a barrier having a bottom is installed near the high-voltage electrode, a barrier effect is also observed with negative discharges, allowing breakdown voltage to rise
Keywords :
composite insulating materials; electric breakdown of gases; electric breakdown of solids; gaseous insulation; organic insulating materials; polymer films; surface discharges; PET film; composite insulating system; high-voltage electrode; negative breakdown voltages; positive breakdown voltages; protection effect; surface discharge propagation; Breakdown voltage; Dielectrics and electrical insulation; Electrodes; Gas insulation; Optical propagation; Positron emission tomography; Power transformer insulation; Solids; Sulfur hexafluoride; Surface discharges;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1992. Annual Report. Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-0565-5
DOI :
10.1109/CEIDP.1992.283210
