High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Air-current blowout
Reexamination Certificate
2002-09-25
2004-04-27
Mai, Anh (Department: 2832)
High-voltage switches with arc preventing or extinguishing devic
Arc preventing or extinguishing devices
Air-current blowout
C218S045000, C218S080000, C361S612000
Reexamination Certificate
active
06727454
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a gas-insulated switchgear and, more specifically, to a gas-insulated switchgear facilitating maintenance work.
The components including a bus duct and gas-insulated circuit breaker of a conventional gas-insulated switchgear are disassembled and examined individually for maintenance, such as periodic inspection, and are assembled individually after the completion of maintenance work. Thus, the maintenance of the conventional gas-insulated switchgear needs much time for disassembling and assembling the gas-insulated switchgear.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a gas-insulated switchgear facilitating maintenance work.
According to the present invention, a gas-insulated switchgear includes first three-phase buses, second three-phase buses, and a plurality of circuit breakers, wherein a bay unit is formed for each circuit breaker, the bay unit is provided with a bus duct housing the buses of the first and the second three-phase buses, and the bus ducts of the bay units are connected by bellows expansion joints.
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patent: 6134101 (2000-10-01), Bucher et al.
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patent: 6399911 (2002-06-01), Tsuzura et al.
patent: 6510046 (2003-01-01), Arioka et al.
patent: 2000050438 (2000-02-01), None
Miyamoto Toshihisa
Okabe Mamoru
Ozawa Isamu
Yamada Hitoshi
Fishman M.
Hitachi , Ltd.
Mai Anh
Mattingly Stanger & Malur, P.C.
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