Patent ID: 8675350

Claim:
A gas insulated switchgear comprising: a metal container enclosing insulation gas; a center conductor through which a current flows, the center conductor being arranged to extend horizontally in the metal container; a cylindrical member being arranged in the metal container to surround the center conductor, and formed by curving a metal plate-like member into a cylindrical shape and then joining circumferentially opposed both ends of the plate-like member by welding the ends to each other to form a welding portion, the welding portion being located on a lower side of the cylindrical member; a support member on which one axial direction end of the cylindrical member is mounted, the support member being fixed to the metal container to support the cylindrical member; and a cylindrical device that has the cylindrical member inserted therein and is supported by the cylindrical member, and is arranged to surround the center conductor, wherein openings are formed on the cylindrical member by the welding portion, a plurality of the welding portions that are separated away from each other are formed at least at three locations including both axial direction ends of the cylindrical member, and each of the welding portions includes a metal spacer sandwiched between the circumferentially opposed ends of the plate-like member, and the spacer and the circumferentially opposed ends are welded to each other.