Title :
Development of 550 kV-8000 A composite insulator gas bushing
Author :
Kobayashi, Akihiro ; Murase, Hiroshi ; Toyoda, M. ; Shiiki, M. ; Yamaguchi, M. ; Ogata, K.
Author_Institution :
Toshiba Corp., Kawasaki, Japan
Abstract :
A composite insulator gas bushing of 550 kV-8000 A, one of the commonly used largest sizes, has been designed, and various verification tests have been carried out. The rounded shed tip of the hollow insulator makes the bushing partial discharge free up to 635 kV (2E). A creepage distance of 20500 mm lets the bushing withstand the clean fog test with a pollution class of 0.12 mg/cm2, and with an applied voltage of 572 kV (1.8E). Taking advantages of the cylindrical shape of the composite hollow insulator, successful thermal design is realized to flow 8000 A without a heat radiator. Sufficient mechanical performance is observed in seismic tests
Keywords :
bushings; composite insulators; electric breakdown; insulator contamination; insulator testing; silicone rubber insulators; 20500 mm; 550 kV; 572 kV; 635 kV; 8000 A; clean fog test; composite insulator gas bushing development; creepage distance; cylindrical shape; hollow insulator; mechanical performance; rounded shed tip; seismic tests; thermal design; verification tests; Costs; Dielectrics and electrical insulation; Fiber reinforced plastics; Gas insulation; Insulator testing; Partial discharges; Pollution; Porcelain; Rubber; Voltage;
Conference_Titel :
Power Engineering Society Winter Meeting, 2000. IEEE
Print_ISBN :
0-7803-5935-6
DOI :
10.1109/PESW.2000.847712
