Abstract: A gas insulated switchgear apparatus comprising connection conductors connected to a connection portion to breaker side, disconnectors connected to the connection conductors, cable heads connected to the disconnectors, lightning arresters having one end connected between the disconnectors and the cable heads, single phase voltage transformers provided in one of three phases and having one end connected between the disconnectors and the cable heads and a disconnector cylindrical vessel filled with an insulating gas and containing the connection conductors, the disconnectors, the cable heads, the lightning arresters and the single phase voltage transformers therein. The cable heads are disposed so that the axis of the disconnector cylindrical vessel and the axes of the cable heads are parallel. The lightning arresters are disposed so that the axis of the disconnector cylindrical vessel and the axes of the lightning arresters are parallel.

Abstract: A gas filled switchgear comprising a first grounding switch housed sealingly in a container and having a plurality of linearly reciprocally movable first contacts and a second grounding switch housed sealingly in the container and having a plurality of second movable contacts. The second movable contacts are linearly reciprocally movable in a direction making a predetermined angle with respect to the reciprocal movement of the first contacts. A driving shaft drives the first movable contacts and second movable contacts.

Abstract: A gas insulated switchgear in which the fastening portion at the lead-in terminals connecting the first cable head vessel and the second cable head vessel is at a level lower than the level of the fastening portion at the lead-in terminals connecting the interrupter vessel and the first cable head vessel. The conductors extend from the interrupter in the interrupter vessel to the first cable heads through the lead-in terminals at one side of the first cable head vessel, and from the first cable heads to the second cable heads through the opposite side of the first cable head vessel. Therefore, the height dimension of the second cable head vessel can be decreased to provide a gas insulated switchgear which is economically superior and efficiently utilizes the total space.

Abstract: A gas insulated switchgear includes an interrupter connected to at least one bus bar through a disconnector and a monitor panel and having an operating mechanism disposed at eye level (with respect to ground). The operators of respective grounded switches, which are operable to disable the switchgear to allow inspections of the bus bar disconnector and the interrupter are arranged and positioned in the vicinity, and at the same face, of the operating mechanism of the interrupter, whereby the disconnector and the grounded switches can be operated and inspected at eye level.

Abstract: A gas insulated switchgear comprises main circuit disconnector units for three phases contained within a single vessel and a shunt circuit disconnector unit also contained within the vessel and provided in the vicinity of a side portion of the main circuit disconnector units. Each of the main circuit disconnector units and the shunt circuit disconnector unit comprises a stationary side electrode and a movable side electrode. Axes passing through the electrodes are arranged substantially parallel to each other. One of the movable side electrode and the stationary side electrode of the shunt circuit disconnector unit is electrically connected to one of the movable side electrode and the stationary side electrode of one of the main circuit disconnector units, whereby electrical paths can be lead out of the vessel through the shunt circuit disconnector unit.