Patent ID: 8592708
Filing Date: 2013-11-26
Classification: H01H,H02B

Abstract:
1. A gas-insulated vacuum circuit breaker comprising: a sealed tank being filled with insulating gas; a vacuum valve being arranged in the sealed tank, the vacuum valve including a movable electrode, a fixed electrode, a bellows, and a vacuum tank, and opening the movable electrode from the fixed electrode maintaining vacuum condition within the bellows; a medium-pressure space being arranged in the sealed tank, the medium-pressure space applying pressure on one surface of the bellows that is the other surface of the bellows on which vacuum pressure being applied, the medium-pressure space being maintained to an intermediate pressure condition between the pressure of the insulating gas filled in the sealed tank and the vacuum pressure; a sealed chamber for monitoring pressure being provided on the sealed tank to monitor the gas pressure; an insulated pipe being installed between the sealed chamber for monitoring pressure and the medium-pressure space connecting therebetween; and a pressure monitoring and controlling means being installed in the sealed chamber for monitoring pressure, the pressure monitoring and controlling means monitoring the internal pressure thereof and controlling the internal pressure according to a predetermined setting value.