Mitsubishi Electric Corporation

Toshihiko Takematsu

Yuichi Takai

Taiki Donen

Satoshi Ochi

Ryo Kamimae

Takayuki Kai

An object of the present disclosure is to provide a switchgear that reduces a cost of periodic replacement of a drive unit and ensures reliability. A switchgear of the present disclosure includes a fixed electrode, a movable electrode provided to face the fixed electrode, the movable electrode being contactable with and separable from the fixed electrode, a piston provided opposite to the fixed electrode to drive the movable electrode via a movable shaft connected to the movable electrode, a container to accommodate the piston, and an arc generation mechanism bridging including metal and provided in the container at a position opposite to the fixed electrode, the arc generation mechanism bridging a terminal unit connected to an external circuit, the arc generation mechanism bridging opening a circuit with the terminal unit when energized to generate an arc at an opened portion.

Switchgear and power converter

Provided is a small-sized, reliable vacuum interrupter that does not involve upsizing and complication of the reduction load application mechanism. A vacuum interrupter of the present invention includes a magnetic body disposed on a circumferential edge around a stem surface of at least one of a moving current-carrying stem and a fixed current-carrying stem. The magnetic body includes a lower magnetic permeance portion having a lower magnetic permeance than the other portion. The lower magnetic permeance portion produces a magnetic field parallel to the axial direction. Arc discharge is driven in the direction of the parallel magnetic field, thus being extinguished.

Growing community of inventors

Chiyoda-ku, Japan

Toshihiko Takematsu