Abstract: A switchgear includes a movable part capable of reciprocating movement, a movable contact coupled to the movable part, a member that biases the movable contact, a latch capable of switching between a first state in which movement of the movable contact is restricted and a second state in which movement is permitted, a part that accommodates the movable part and the movable contact therein, a fixed contact provided outside of the accommodating part, and a moving part that moves with the movable contact. The latch is switched to the second state when the movable contact has moved against the biasing force. The accommodating part contains a first region and a second region, which is on a side of the fixed contact with respect to the first region within a range of movement of the moving part. The first region has an inner diameter smaller than that of the second region.

Abstract: 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.