Patent attributes
A power switchgear includes: a vacuum switch tube in a ground tank; a movable side conductor which passes through the ground tank to connect to one side of the vacuum switch tube, and extends to the upper side of the tank; a fixed side conductor which passes through the ground tank and connects to another side of the vacuum switch tube, and extends to the upper side of the tank. A conical insulator is placed on an opening of the ground tank, and a tip end is inserted in the ground tank; an insulation cylinder is placed at a rear end of the conical insulator to cover the inside of a concave portion of the conical insulator, and protrudes outside the ground tank; and a surge suppression apparatus inside the insulation cylinder has a terminal in the conical insulator and connected to a main circuit of the vacuum switch tube.
