Patent ID: 8228665

Claim:
A gas insulated switchgear in which a plurality of breaker units are connected in series to form a ring bus and line-side devices are branched from between the breaker units, each of the breaker units including a vertical breaker provided with two branch ports that are an upper port and a lower port and are branched horizontally from a side surface thereof in the same direction, and an instrument current transformer and a disconnector that are connected in this order to each of the two branch ports, wherein: the two branch ports of each of the breaker units face the same direction, the breaker units are arranged linearly in a direction orthogonal to the same direction, upper disconnectors or lower disconnectors of any two adjacent breaker units are connected by a connection bus, and the connection bus is arranged to run alternately at upper and lower levels with respect to an alignment direction of the breaker units; a disconnector of two disconnectors of a breaker unit positioned at one end of the alignment direction, which is not connected to a disconnector of an adjacent breaker unit to the breaker unit, is connected by a communication bus to a disconnector of two disconnectors of a breaker unit at the other end of the alignment direction, which is not connected to a disconnector of an adjacent breaker unit to the breaker unit, so that the breaker units at the two ends of the alignment direction communicate with each other; at least one of two disconnectors of each of the breaker units is connected to the line-side devices, and the line-side devices are arranged to face the breaker units across the disconnectors, the breaker units are arranged in such a manner that distances between any two adjacent breaker units are determined to be alternately long and short with respect to the alignment direction, and in at least all of the breaker units other than the breaker units positioned at the two ends of the alignment direction, an operating device of each of the two disconnectors that are respectively connected to the two branch ports is arranged to overlap each corresponding disconnector when seen in plane view from above.