Patent ID: 7759595

Claim:
A gas insulating switchgear equipped with a grounding switchgear, the gas insulating switchgear comprising: a sealing vessel that fills an insulation gas; a main circuit-switching fixed electrode that is fixed to the sealing vessel; a movable electrode that comes in contact with the main circuit-switching fixed electrode; a grounding-switching fixed electrode capable of conducting current; and a driving device that drives the movable electrode, the main circuit being switched by the driving of the movable electrode, wherein the main circuit-switching fixed electrode and the grounding-switching fixed electrode are linearly arranged in a longitudinal direction of the movable electrode, and the driving device drives linearly the movable electrode to three positions of a closed-circuit position, an open-circuit position, and a grounding position and holds the movable electrode there, wherein the driving device includes: an insulated link that drives the movable electrode; a driving shaft that turns the insulated link; a positioning cam that is fixed to the driving shaft to determine the three positions; a driving lever that is fixed to an operating shaft; an overshoot preventing claw that is engaged with the driving lever; a driving cam that is engaged with the driving lever by a toggle spring; and a roller that is provide in a hub fixed to the driving shaft so as to be driven by the driving cam.