Hitachi, Ltd.

Yuko Kajiyama

Kenji Tsuchiya

Shuichi Kikukawa

Daisuke Sugai

Yoshinori Nishizawa

The vacuum insulated switch-gear is configured to be capable of being lifted up with a jack-up bolt to adjust a seated height of the vacuum insulated switch-gear. The switch-gear comprises a nut fixed on a base plate forming a bottom of the vacuum insulated switch-gear. The nut is used as a mating component with the jack-up bolt.

Vacuum insulated switch-gear and its height adjusting method

A vacuum insulated switchgear is provided with: an enclosure having a switch block defined by a grounded metal plate, a bus block positioned above the switch block, and a cable block positioned on the rear side of the bus block; a bus provided in the bus block and connected with a fixed contact of a vacuum double-break three-position switch; the vacuum double-break three-position switch provided in the switch block so that its movable contacts are positioned below its fixed contacts; an operating device provided in the switch block so as to be positioned below the vacuum double-break three-position switch; and a lever mechanism that couples together the movable contacts of the vacuum double-break three-position switch and the operating device.

Vacuum insulated switchgear

Switchgear having a vacuum-insulated switchgearcomprising switches having at least breaking and disconnecting functions, each placed in a unit, and solid-insulated bus barsfor electrically connecting the switches in each unit; an air-insulated switchgearcomprising switches having at least breaking and disconnecting functions, each placed in a unit, and air-insulated bus bars for electrically connecting the switches in each unit; and_the vacuum-insulated switchgearand the air-insulated switchgearare installed side-by-side, wherein the vacuum-insulated switchgearand the air-insulated switchgearare electrically connected through flexible conductorswhich are provided between the solid-insulated bus barsand the air-insulated bus bars.

Switchgear

A distribution switchgear has an equipment room, main busbar room and cable room, which are formed in a distribution panel housing by partitioning the housing, from front to back such that the equipment room is located just behind the front door of the housing, with the busbar room behind the equipment room. In the equipment room are disposed a circuit breaker, a current transformer on a load side of the circuit breaker and a zero-phase-sequence current transformer on a power supply side of the circuit breaker. The equipment units are vertically arranged in the equipment room. In the busbar room are a solid-insulated main busbar, a solid-insulated link busbar connected with the main busbar and connected with one side of each of the equipment units and a solid-insulated branch busbar connected with the other side of each of the equipment units.

Growing community of inventors

Hitachiota, Japan

Yuko Kajiyama