To prevent entry of rainwater from gaps at a threaded portion between a bolt and a nut.
In a gas insulated electrical apparatus wherein, an insulation spacer 9 is sandwiched between flanges 8a that are provided at respective end portions of a pair of opposing cylindrically formed containers, a plurality of bolt holes 8b, 9a are provided through the respective flanges 8a and the insulation spacer 9 in the direction of the circumference, the flanges 8a and the insulation spacer 9 are fastened by a bolt 10 and a nut 11 piercing through the bolt holes 8b, 9a, and the insulation spacer 9 supports the electrical apparatus with insulation gas sealed in the containers, ventilating holes 8c are provided on the flanges 8a that communicated with the bolt holes 8b, 9a and the exterior while foam material 12 that is caused to foam inside the bolt holes 8b, 9a is filled in the bolt holes 8b, 9a.
HARA KAZUHIKO
YAMAUCHI SHIRO
TADA MINORU
