Hitachi, Ltd.

Japan Ae Power Systems Corporation

Shunji Ito

Rei Henmi

Keiichi Tsuzura

Ryoichi Shinohara

Masahiro Takahoshi

Yoriyuki Aiko

Fumihiro Endo

Toshiaki Rokunohe

Tomoaki Utsumi

Takashi Omori

Yoshitaka Yagihashi

Ryouichi Shinohara

Ryouichi Mitsugi

Hiroyasu Watanabe

In a gas-insulated switchgear tank in which an electric insulating characteristic is improved by a gas, and which has a vacuum circuit-breaker, a disconnecting switch, and a container in which container the vacuum circuit-breaker and the disconnecting switch are arranged and an inside of which container is adapted to be hermetically sealed and filled with the gas in such a manner that the vacuum circuit-breaker and the disconnecting switch are at least partially surrounded by the gas, the gas includes Nand O.

Gas-insulated switchgear tank

In a gas-insulated switching device capable of reducing the physical installation space while suppressing the installation height of the device, busbar connecting lines are disposed perpendicularly to and between as pair of main busbars to connect the main busbars. Three sets (one set per phase) of three serially connected horizontal broker units are placed in parallel, and each of the main busbars has three busbar units along a portion extending vertically from the end of the busbar connecting line.

Gas insulated switchgear

In order to shorten the length of connection buses and reduce a cost, in the present invention, a plurality of T-branched circuit breaker units are arranged in a direction perpendicular to the T-branch direction, and the plurality of circuit breaker units are connected by first connection bus units and second connection bus units in series alternately in a rectangular wave shape on a horizontal plane of approximately the same height as the T-branch portions of the circuit breaker units . Thereby, first connection buses and second connection buses are stretched around on the horizontal plane of the same height as the T-branch portions of the circuit breaker units , but not stretched around in an up and down direction. Therefore, the length of the connection buses can be reduced, and the cost also can be reduced.

A gas insulated switchgear includes a plurality of T-branched circuit breaker units arranged in a direction perpendicular to the T-branch direction, and connected by first connection bus units and second connection bus units in series alternately in a rectangular wave shape on a horizontal plane of approximately the same height as the T-branch portions of the circuit breaker units. First connection buses and second connection buses are arranged around on the horizontal plane of the same height as the T-branch portions of the circuit breaker units, but are not arranged in an up and down direction.

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Hitachi, Japan

Shunji Ito