To reduce an installation space by disposing a vertical one-point cut porcelain gas circuit breaker and a vertical single-cut breaker on a common bed.
A vertical single-out breaker 31 is disposed on one end side of a common frame 35, and with an insulation distance A between its upper terminal 31d portion and the front end portion of an isolator blade 33c in the pole open condition of the isolator 33 taken as a required minimum insulation distance withstanding the voltage applied to the point between poles at the time of pole opening of the vertical single-cut breaker 31, the mobile side supporting insulator 33a of the disconnector 33 is disposed. A fixed side support porcelain 33h is arranged at the input position of a disconnector blade 33c. In an insulation distance B between three phases, the disconnector 33 is of vertical single-cut, and the portion of the lower terminal 31c of the vertical single-cut breaker 31 becomes the largest, so that in the energizing condition of the portion, a phase-to-phase distance is determined as a required minimum distance withstanding the voltage applied to between the phases. The vertical single-cut breaker and the disconnector 33 are installed on a common bed 35.
KISHIDA RYOJI
SOTOJIMA NORICHIKA
