Patent ID: 8254088

Claim:
Gas-insulated switchgear of double bus type that is structured by connecting a plurality of breaker units having breakers via double buses, wherein each breaker unit includes a breaker that is arranged such that a longitudinal direction is horizontal, that has two outlets branching perpendicularly in same direction keeping a predetermined interval in the longitudinal direction, and that has an operation device therefor arranged on an opposite side to the outlets; a lower disconnector that is connected to one of the outlets of the breaker and is arranged above the breaker; a line-side device that is connected to the other of the outlets and is arranged above the breaker; a lower bus that is connected to the lower disconnector and is arranged between the two outlets; an upper disconnector that is arranged above the lower disconnector; an upper bus that is connected to the upper disconnector and is arranged above the lower bus in a layered manner; a first bellows that is arranged so as to connect the lower disconnector and the upper disconnector vertically; a first support frame that supports the breaker from below; a second support frame that is arranged under the first support frame and that is separatable from the first support frame; a second bellows that is arranged only at one end of the upper bus at a bus connection with an adjacent unit of the plurality of breaker units; and a third bellows that is arranged only at one end of the lower bus at a bus connection with an adjacent unit.