Patent ID: 8000087

Claim:
Gas insulated switchgear including a plurality of integral units, in each of which a first partial unit, a second partial unit, and a third partial unit are connected in series in sequence while line-side devices are branched from a position between the first partial unit and the second partial unit and from a position between the second partial unit and the third partial unit, each of the first, the second, and the third partial units including: a circuit breaker of a vertical type having two branch outlets formed of upper and lower branch outlets that horizontally branch from a lateral face of the circuit breaker in a same direction; a current transformer and an upper disconnector that are connected in sequence to the upper branch outlet; and another current transformer and a lower disconnector that are connected in sequence to the lower branch outlet, one end of each of the integral units being connected to an upper main bus, whereas other end of each of the integral units being connected to a lower main bus, the upper and lower main buses being provided in an upper position and a lower position, respectively, wherein the first, the second, and the third partial units are arranged in an arranged direction side by side such that heights of the circuit breakers are equal to one another and that the two branch outlets therein are oriented in a same direction, the lower disconnector included in the second partial unit and the lower disconnector included in the first or the third partial unit are at a same height and are connected by a connection bus, whereas the upper disconnector included in the second partial unit and the upper disconnector included in the first or the third partial unit, which is not connected to the lower disconnector included in the second partial unit, are at a same height and are connected by a connection bus, the upper and lower disconnectors in each of the first, the second, and the third partial units are interposed between the upper and lower main buses extending in the arranging direction, the upper disconnector included in the first or the third partial unit that is connected to the lower disconnector included in the second partial unit is connected to the upper main bus via a T-shaped branch structure provided on the upper main bus, and the lower disconnector included in the first or the third partial unit that is connected to the upper disconnector included in the second partial unit is connected to the lower main bus via a T-shaped branch structure provided on the lower main bus.