Patent ID: 9123491
Filing Date: 2015-09-01
Classification: H01H

Abstract:
1. A gas insulated switchgear comprising: an enclosure; a stationary contact arm fixedly installed within the enclosure; a movable contact arm movably installed within the enclosure such that it can be brought into contact with or separated from the stationary contact arm; a cam moving the movable contact arm by reciprocating between a closing position and an opening position; and an actuator moving the cam, wherein the cam comprises an opening cam surface allowing the movable contact arm to move away from the stationary contact arm and a closing cam surface allowing the movable contact arm to move toward the stationary contact arm, wherein the opening cam surface comprises first and second cam surfaces, wherein movement acceleration of the movable contact arm by the first cam surface is greater than movement acceleration of the movable contact arm by the second cam surface when the actuator moves the cam to the opening position, and wherein a movement distance of the movable contact arm by the first cam surface is less than a movement distance of the movable contact arm by the second cam surface when the actuator moves the cam to the opening position.