Hitachi, Ltd.

Hiroshi Kozawa

Takahide Seki

Syunji Itoh

A gas circuit breaker having a single supporting structure easy to be inspected. The gas circuit breaker includes: a grounded tank in which a gas is enclosed; a fixed contact contained in the tank; a moving contact contained in the tank and electrically connected to the fixed contact; an insulating grounded support for supporting the moving contact in a state that the moving contact is insulated from the tank; an inter-contact insulating tube for supporting the fixed contact in such a manner that the fixed contact is insulated from the moving contact; an in-bushing conductor connected to the side of the fixed contact; an in-bushing conductor connected to the side of the moving contact; and a maintenance cover removably provided on a side end portion of the tank. The gas circuit breaker further includes a fixed contact side conductor mounted on the fixed contact; and a connecting conductor, mounted on the fixed contact side conductor, for slidably supporting the in-bushing conductor, wherein a hole which allows the connecting conductor to be moved in the axial direction of the in-bushing conductor is formed in the fixed contact side conductor.

Gas circuit breaker

A switch apparatus for use in a distribution system, having a case, a pair of bushings arranged on the case so as to oppose each other, and a breaker arranged in the case such that breaking and closing actions take place in a direction perpendicular to an imaginary line interconnecting the pair of bushings. Both terminals of the breaker are connected to the corresponding bushings through conductors.

Growing community of inventors

Katsuta, Japan

Hiroshi Kozawa