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

Volume

3

fYear

2000

fDate

23-27 Jan 2000

Firstpage

2294

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Society Winter Meeting, 2000. IEEE

Print_ISBN

0-7803-5935-6

Type

conf

DOI

10.1109/PESW.2000.847712

Filename

847712