Mitsubishi Denki Kabushiki Kaisha

Shunichi Katsube

Kazunori Fukuya

Shinji Yamagata

Hiroshi Adachi

Fumiaki Baba

Takao Mitsuhashi

Kazuharu Kato

Kenichi Nishina

Itsuo Nishiyama

Shoji Yamaguchi

Osamu Hiroi

Tadaki Murakami

Tosikazu Uemoto

Mitugu Takahasi

Mitsugu Takahashi

Satoru Yamasaki

Circuit breaker

An organic and inorganic complex composition wherein the resin is at 15-70 wt % and the content of one or more inorganic compounds capable of dehydration at 150&deg; C. or more is at 80-30 wt %. When the composition is exposed to combustion, inorganic compounds being capable of dehydration at 150&deg; C. or more and being contained in the organic and inorganic complex composition generate steam which then suppresses combustion. Simultaneously, endothermic reaction during steam generation deprives combustion heat. A switch having a molded article of which the entirety or a part is composed of an organic and inorganic complex composition is provided, wherein the base inside of the base of a box is composed of for example an organic and inorganic complex composition with the resin content at 15-70 wt % and the content of one or more inorganic compounds capable of dehydration at 150&deg; C. or more at 80-30 wt %.

Organic and inorganic complex compound and switch using same

A switch having a molded article of which the entirety or a part is composed of an organic and inorganic complex composition is provided, wherein the base inside of the base of a box is composed of for example an organic and inorganic complex composition with the resin content at 15 to 70 wt % and the content of one or more inorganic compounds capable of dehydration at 150&deg; C. or more at 80 to 30 wt %.

Polyester resin composition, switch made from the same, and method of

A switch containing a switch case, contacts adapted to be opened and closed, an arc extinguishing chamber disposed in the vicinity of the contacts, and an arc extinguishing material capable of reducing the amount of metal particles and free carbons to be scattered from components disposed within the switch by an arc generated when the contacts are opened or closed or capable of insulating the metal particles and the free carbons to convert into an insulator, thereby inhibiting a decrease in arc resistance expected to occur upon the generation and extinction of the arc and a decrease in insulation resistance expected to occur within and around the arc extinguishing chamber and at inner wall surfaces of the switch case upon and after the extinction of the arc. The switch is applicable to a switch expected to generate an arc upon interruption of electric current flowing therethrough such as a circuit breaker, current-limiting device or electromagnetic contactor and is capable of immediately extinguishing the arc and inhibiting the decrease in insulation resistance within and around the arc extinguishing chamber and at inner wall surfaces of the switch case.

Switch and arc extinguishing material for use therein

A switch comprising a switch case, contacts adapted to be opened and closed, an arc extinguishing chamber disposed in the vicinity of the contacts, and an arc extinguishing material capable of reducing the amount of metal particles and free carbons to be scattered from components disposed within the switch by an arc generated when the contacts are opened or closed or capable of insulating the metal particles and the free carbons to convert into an insulator, thereby inhibiting a decrease in arc resistance expected to occur upon the generation and extinction of the arc and a decrease in insulation resistance expected to occur within and around the arc extinguishing chamber and at inner wall surfaces of the switch case upon and after the extinction of the arc. The switch according to the present invention is applicable to a switch expected to generate an arc upon interruption of electric current flowing therethrough such as a circuit breaker, current-limiting device or electromagnetic contactor and is capable of immediately extinguishing the arc and inhibiting the decrease in insulation resistance within and around the arc extinguishing chamber and at inner wall surfaces of the switch case.

Growing community of inventors

Fukuyama, Japan

Shunichi Katsube