Hitachi, Ltd.

Yoshiaki Inami

Toyokazu Tanaka

Takashi Omori

Takahide Seki

Koichi Nakano

Kazuhiro Fujii

Katsuyuki Takada

Masafumi Ooshima

Shunji Itou

A switchgear having a primary circuit breaker and a secondary circuit breaker respectively arranged on the primary side and secondary side of a load switch or a voltage and current transformer for an instrument, a primary grounding switch arranged between the load switch or voltage and current transformer for an instrument and the primary circuit breaker, and a secondary grounding switch arranged between the load switch or voltage and current transformer for an instrument and the secondary circuit breaker, wherein to the primary and secondary circuit breakers and grounding switches, connection means are respectively connected so as to move the moving electrodes of the circuit breakers and grounding switches and an operation device for operating the moving electrodes in connection with each other via the connection bars is included and a receiving transformation apparatus using it.

Switchgear and receiving transformation apparatus using the same

A switchgear wherein a connecting portion to be connected to a transmission side branch bus container and a connecting portion to be connected to a receiving side branch bus container are provided on a circuit breaker container in an up and down relation so as to face the same direction. Any one of the transmission side branch bus container and the receiving side branch bus container is connected to the connecting portion positioned on the upper side, and the other is connected to the connecting portion positioned on the lower side, and a transmission side power cable terminal container or a receiving side power cable terminal container is arranged at a position deviated horizontally from the axis of the transmission side branch bus container or the receiving side branch bus container.

Switchgear

A power receiving unit is arranged in one side of an instrument potential/current unit transformer. A transformer-side unit is arranged in the other side of the instrument potential/current transformer units. A bypass bus connecting the power receiving unit and the transformer-side unit is arranged in parallel to the row of cubicles. The gas insulated switchgear can be made small in size and the work for adding a bank can be performed with substantially small man-power. The size of the gas insulated switchgear can be also prevented from increasing due to the addition of a bank.

Gas insulated switchgear equipment including a bypass bus and bypass

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Hitachi, Japan

Yoshiaki Inami