Mitsubishi Denki Kabushiki Kaisha

Tatsunori Ikeda

Shinji Yamagata

Fumiyuki Hisatsune

Manabu Sogabe

Hirotoshi Ohishi

A remotely operated circuit breaker comprises a handle which is selectively positioned at one of three operating positions: a handle off position into which the handle is manually positioned to forcibly open the electrical contacts in the circuit breaker; a handle auto position into which the handle is positioned manually so that the electrical contacts are driven to normally open and close by a control mechanism which in turn is controlled by an electromagnetic driving unit response to a remote control voltage applied thereto; and a trip position into which the handle is automatically positioned by the control mechanism and a forcible overcurrent protecting unit to and the electrical contacts are opened rapidly when an overcurrent as well as a short-circuit current flows through the electrical contacts.

Remotely-operated circuit breaker

A circuit breaker has current-limiting resistances (12) which are provided between a base (1) and a cover (18) and which limit a current to a tripping bimetal (11) for preventing fusing of the tripping bimetal (11).

Growing community of inventors

Hiroshima, Japan

Tatsunori Ikeda