Patent ID: 6696657
Filing Date: 2004-02-24
Classification: H01H

Abstract:
A puffer type gas circuit breaker with an arc suppression gas feed insulated nozzle made of heat proof resin provided on the periphery of a movable arc contact characterized in that;said insulated nozzle comprises a downstream area, an area in the vicinity of a throat and an upstream area, and wherein said area in the vicinity of the throat of said insulated nozzle contains inorganic material, while the said downstream area and said upstream area do not contain said inorganic material; a movable arc contact cover is installed between said nozzle and said movable arc contact so as to surround said moveable arc contact; and said movable arc contact cover has a downstream area and an upstream area, and said downstream area is made of heat proof resin containing inorganic material, while said upstream area is made of heat proof resin not containing said inorganic material.