Patent ID: 8859924
Filing Date: 2014-10-14
Classification: H01H

Abstract:
1. A gas circuit breaker comprising: a fixed part comprising a fixed arc contact and a first fixed contact maker; a movable part comprising a movable arc contact selectively making contact with the fixed arc contact, a cylinder in which the movable arc contact is disposed, and a second fixed contact maker guiding a movement of the cylinder; a piston disposed in the second fixed contact maker; and a double compression mechanism configured to move the piston in a direction opposite to a moving direction of the movable part when the movable part is moved to separate the fixed arc contact and the movable arc contact for interrupting a fault current, wherein the movable part further comprises a manipulation device connecting part extending from a side of a barrier dividing an inner space of the cylinder into a compression chamber and an expansion chamber, and the manipulation device connection part is inserted through the piston, wherein the movable arc contact extends from the other side of the barrier and is disposed in the expansion chamber.