Mitsubishi Denki Kabushiki Kaisha

Mineo Sano

Haruhiko Ito

Yuji Sako

A thermally-sensitive overcurrent protective relay includes a housing case, a bimetal strip bendable in response to an operating current flowing through a control circuit of the overcurrent protective relay, and a movable contact biased by a spring to form a toggle mechanism operable in response to the bending action of the bimetal. A lever supporting bracket mechanically supports the movable contact at a fulcrum portion and electrically connects the movable contact to a terminal. The terminal is mounted in the housing case to conduct current to the control circuit through a contact spring for electrically connecting the lever supporting bracket. This lever supporting member includes a trip current adjusting mechanism adapted to be rotated at its end portion by turning an adjusting screw for adjustment of the operation current.

Thermally-sensitive overcurrent protective relay including wire

A thermally-sensible overcurrent protective relay comprising a toggle mechanism operable in connection with the bending operation of a bimetal bendable in response to current flowing through a main circuit a normally-open contact having a normally-open fixed contact element and a normally-open movable contact element both formed by a resilient conductive thin plate having a contact portion at one end thereof a normally-closed contact having a normally-closed fixed contact element and a normally-closed movable contact element both formed by a resilient conductive thin plate having a contact portion at one end thereof, and a mechanism adapted to be selected to an automatic resetting position and a manual resetting position in such a manner as to contact one surface of the contact portion of the normally-open fixed contact element at one end of a changeover lever pivotally rotatable to displace the normally-open fixed contact element toward the normally-open movable contact element and retain the normally-open contact in two positions at the other end of the changeover lever; wherein the normally-closed contact and the normally-open contact are interlockingly operated by the operation of the toggle mechanism.

Thermally-sensible overcurrent protective relay including automatic

An electromagnet for use in a contactor, for example, is provided with non-magnetic thin plates fixed to either or both of the fixed and moving-iron core contacting surfaces. The plates provide good abrasion and shock resistance and prevent attraction between the fixed and moving cores due to magnetic remanence.

Growing community of inventors

Mie, Japan

Mineo Sano