Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Denki K.k.

Hideo Suhara

Hiroshi Fujii

Shigemi Tamaru

Setsuo Hosogai

Shinji Yamagata

Fumiyuki Hisatsune

Junichi Terachi

Kiyomi Yamamoto

Takuo Takatsuka

A circuit interrupter which comprises a pair of separable contact structures each including a contact element, at least one of the contact structures being movable between a closed position and an open position relative to the other contact structure for opening and closing an electric circuit extending through the circuit interrupter, the movable contact structure having an arm support that is pivotable about an axis, a movable contact arm pivotally supported on the arm support and extending in a parallel and an opposite direction to the other contact structure for generating an electromagnetic repulsive force therebetween, and a biasing means connected between the arm support and the movable contact arm for biasing the movable contact arm to a predetermined position with respect to said arm support, and an operating mechanism connected to the arm support of the movable contact structure for separating the movable contact structure from the stationary contact structure in response to an overcurrent flowing through the circuit interrupter, the movable contact arm having a common pivot axis to the pivot axis of the arm support.

Circuit interrupter

A circuit interrupter which comprises, in a compartment defined in an electrically insulating housing, a pair of separable contacts defining, when separated, an arcing region therebetween, and an operating mechanism, including a tripping unit and an operating handle, for opening and closing the separable contacts. The housing which includes an electrically insulating bottom wall has a gas exhaust passage having an inlet opening in the inner surface of the housing. The inlet of the gas exhaust passage is located in the bottom wall at a position effective for exhausting an arced gas generated in the arcing region without contacting the operating mechanism.

Growing community of inventors

Hiroshima, Japan

Hideo Suhara