Patent ID: 6515248
Filing Date: 2003-02-04
Classification: H01H

Abstract:
A gas circuit breaker comprising:a vessel containing insulating gas, a fixed contact installed inside said vessel, a movable contact installed face-to-face with said fixed contact so that it can be disconnected with said fixed contact, a shaft provided with a hollow portion to allow said movable contact to be moved by the force of an operation mechanism transmitted through an insulating rod, a puffer chamber provided outside said shaft to compress gas to be blown on an arc occurring between said fixed and movable contacts, an insulation nozzle for guiding to said arc the gas compressed in said puffer chamber, and a gas exhaust chamber provided on the rear of said puffer chamber; and wherein means are provided whereby the hot gas discharged from the hollow portion of said shaft is discharged into the inner side of said vessel after gas temperature and velocity have been interrupted by convection of the gas in said gas exhaust chamber.