Title :
Coating effect on AC and impulse breakdown stress of SF6
Author :
Matsuo, T. ; Hirotsu, K. ; Hata, R.
Author_Institution :
Sumitomo Electr. Ind. Ltd., Osaka, Japan
Abstract :
Under a uniform electric field and high (0.3 MPa) gas pressure, sulfur hexafluoride (SF6) gas insulation breakdown strength was measured. When the coating is so thick that the electrical stress concentration caused by surface roughness is almost negligible, the breakdown stress for AC and impulse voltage is respectively 30~88% and 18~40% higher than that with bare electrodes. Breakdown stress dependence on the coating thickness and the electrode materials is discussed
Keywords :
SF6 insulation; electric breakdown; electric strength; high-pressure effects; insulating thin films; surface topography; 0.3 MPa; AC breakdown stress; SF6; breakdown strength; breakdown stress; coating effect; coating thickness; electrical stress concentration; electrode materials; gas insulation; high gas pressure; impulse breakdown stress; impulse voltage; sulfur hexafluoride; surface roughness; uniform electric field; Breakdown voltage; Coatings; Electric breakdown; Electric fields; Electric variables measurement; Electrodes; Gas insulation; Pressure measurement; Stress; Sulfur hexafluoride;
Conference_Titel :
Electrical Insulating Materials, 1998. Proceedings of 1998 International Symposium on
Conference_Location :
Toyohashi
Print_ISBN :
4-88686-050-8
DOI :
10.1109/ISEIM.1998.741734
