Finnegan, Henderson, Farabow, Garrett & Dunner L.L.P.
Gas circuit breaker
A gas circuit breaker of an embodiment includes a sealed container, a first contact part and a second contact part, an operation mechanism, an insulating nozzle, a pressure accumulator, and an electric field shield. The insulating nozzle is displaced in conjunction with the first contact part in a separation process of the first contact part and the second contact part. The insulating nozzle surrounds arc discharge generated between the first contact part and the second contact part. The electric field shield is attached to the insulating nozzle. The electric field shield has a floating potential during a period of at least part of the separation process. The electric field shield is electrically connected to the second contact part such that the electric field shield has the same potential in a completely open electrode state in which separation between the first contact part and the second contact part is terminated.
KABUSHIKI KAISHA TOSHIBA TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION
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Tadashi Amane Norimitsu Toshiyuki Takanori Tooru Akira Tsutomu
Mori Majima Kato Uchii Yasuoka Inoue Shimamura Tanaka