Mitsubishi Denki Kabushiki Kaisha

Kenichi Nishina

Takao Mitsuhashi

Shinji Yamagata

Kazunori Fukuya

Mitsugu Takahashi

Hiroshi Adachi

Fumiaki Baba

Kazuharu Kato

Shunichi Katsube

Itsuo Nishiyama

Shoji Yamaguchi

Osamu Hiroi

Tadaki Murakami

Mitugu Takahasi

Satoru Yamasaki

Tosikazu Uemoto

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 %.

Organic and inorganic complex compound and switch using same

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.

A switch includes a moving element having a traveling contact at one end thereof, and a repelling element having a repelling contact at one end thereof and extending substantially parallel to the moving element, and the repelling contact capable of making and breaking contact with the traveling contact, and the switch further comprising a conductor connecting the repelling element to the side of a power source system, and the conductor including a first conductor portion positioned within the limits of the traveling contact and said repelling contact when said moving element and the repelling element are opened so as to be connected to the side of the power source system, and a second conductor portion connecting the first conductor portion to the repelling element at an end on the side opposed to the repelling contact.

Switch including a moving element, a repelling element and a conductor

A switch includes a fixed contact having a first conductor portion connected to a terminal, a second conductor portion having a stationary contact, and a third conductor portion. The third conductor portion is disposed on the side of the other end of a moving contact to which a traveling contact is not mounted with respect to a position of the stationary contact, and on the side opposed to the terminal. The first conductor portion is disposed above a contact surface of contacts at a contact closing time, and is disposed below a contact surface of the traveling contact at a contact opening time. A position of the first conductor portion which can be surveyed from a surface of the traveling contact at an opening time of the contacts is coated with an insulator. Thereby, it is possible to provide an excellent current-limiting performance since an entire current path of the fixed contact generates electromagnetic force to stretch an arc on the side of the terminal, and since the arc is cooled by vapor generated from the insulator.

High voltage switch including U-shaped, slitted stationary contact

A switch is configured that: in the closed-circuit state, at least part of its movable contact arm enters into a oblong generally hexahedral space defined by its elongated stationary conductor in its closed circuit position. Both contacting and breaking of the moving contact and the fixed contact occur in the space. Overall electromagnetic forces generated by the current flowing through the stationary conductor, movable contact arm and the arc induced at the time of breaking effectively act to extend the arc toward a terminal section of the stationary conductor and to increase the arc resistance at the time just after the breaking of both the contacts.

Growing community of inventors

Fukuyama, Japan

Kenichi Nishina