Switch and arc extinguishing material for use therein
First Claim
1. An arc extinguishing material comprising an arc extinguishing insulator composition comprising:
- at least one filler selected from the group consisting of a glass fiber containing not more than 1% by weight of compounds of group 1A metals of the periodic table in total, an inorganic mineral containing not more than 1% by weight of compounds of group 1A metals of the periodic table in total, and a ceramic fiber containing not more than 1% by weight of compounds of group 1A metals of the periodic table in total; and
a matrix resin containing as a principal component at least one member selected from the group consisting of a polyolefin, an olefin copolymer, a polyamide, a polyamide polymer blend, a polyacetal and a polyacetal polymer blend.
3 Assignments
0 Petitions
Accused Products
Abstract
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.
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Citations
43 Claims
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1. An arc extinguishing material comprising an arc extinguishing insulator composition comprising:
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at least one filler selected from the group consisting of a glass fiber containing not more than 1% by weight of compounds of group 1A metals of the periodic table in total, an inorganic mineral containing not more than 1% by weight of compounds of group 1A metals of the periodic table in total, and a ceramic fiber containing not more than 1% by weight of compounds of group 1A metals of the periodic table in total; and a matrix resin containing as a principal component at least one member selected from the group consisting of a polyolefin, an olefin copolymer, a polyamide, a polyamide polymer blend, a polyacetal and a polyacetal polymer blend. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An arc extinguishing material comprising an arc extinguishing insulator composition containing, as a principal component thereof, a polyacetal polymer blend comprising a polyacetal and a thermoplastic resin which is incompatible with the polyacetal and has a melting point of not less than that of the polyacetal.
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16. An arc extinguishing material comprising an arc extinguishing insulator molded product, said product comprising:
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an arc receiving layer made of a reinforced or non-reinforced arc extinguishing insulator composition comprising 0 to 20% by weight of at least one filler selected from the group consisting of a glass fiber containing not more than 1% by weight of compounds of group 1A metals of the periodic table in total, an inorganic mineral containing not more than 1% by weight of compounds of group 1A metals of the periodic table in total and a ceramic fiber containing not more than 1% by weight of compounds of group 1A metals of the periodic table in total, and a matrix resin containing as a principal component at least one member selected from the group consisting of a polyolefin, an olefin copolymer, a polyamide, a polyamide polymer blend, a polyacetal and a polyacetal polymer blend; and a base layer underlying said arc receiving layer and made of an arc extinguishing insulator composition comprising 20 to 65% by weight of at least one filler selected from the group consisting of a glass fiber, an inorganic mineral and a ceramic fiber, and a matrix resin containing as a principal component at least one member selected from the group consisting of a polyolefin, an olefin copolymer, a polyamide, a polyamide polymer blend, a polyacetal and a polyacetal polymer blend. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. An arc extinguishing material comprising an arc extinguishing insulator molded product, said product comprising:
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an arc receiving layer made of a reinforced or non-reinforced arc extinguishing insulator composition comprising 0 to 20% by weight of at least one filler selected from the group consisting of a glass fiber containing not more than 1% by weight of compounds of group 1A metals of the periodic table in total, an inorganic mineral containing not more than 1% by weight of compounds of group 1A metals of the periodic table in total and a ceramic fiber containing not more than 1% by weight of compounds of group 1A metals of the periodic table in total, and a matrix resin containing as a principal component at least one member selected from the group consisting of a polyolefin, an olefin copolymer, a polyamide, a polyamide polymer blend, a polyacetal and a polyacetal polymer blend; and a base layer underlying said arc receiving layer and made of an arc extinguishing insulator composition comprising 20 to 65% by weight of at least one filler selected from the group consisting of a glass fiber, an inorganic mineral and a ceramic fiber, and a matrix resin containing, as a principal component thereof, a thermoplastic resin or a thermosetting resin. - View Dependent Claims (24, 25)
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- 26. An arc extinguishing material for use in a switch comprising a gas generating source compound capable of generating an insulation imparting gas combinable with particles of metals which are scattered from contact elements, contacts and other metal components located adjacent thereto of the switch by an arc generated when the contacts of the contact elements are operated to be opened or closed, said insulation imparting gas being reactive with said metals or being per se electrically insulative, said gas generating source compound is a metal peroxide, a metal alkoxide hydrolysate, a metal sulfate, a metal sulfide, a metal fluoride, or a fluorine-containing silicate.
- 28. An arc extinguishing material for use in a switch comprising a thermoplastic resin, and a gas generating source compound capable of generating an insulation imparting gas combinable with particles of metals which are scattered from contact elements, contacts and other metal components located adjacent thereto of the switch by an arc generated when the contacts of the contact elements are operated to be opened or closed, said insulation imparting gas being reactive with said metals or being per se electrically insulative, said gas generating source compound is a metal peroxide, a metal alkoxide hydrolysate, a metal sulfate, a metal sulfide, a metal fluoride, or a fluorine-containing silicate.
- 31. An arc extinguishing material for use in a switch comprising a thermosetting resin, and a gas generating source compound capable of generating an insulation imparting gas combinable with particles of metals which are scattered from contact elements, contacts and other metal components located adjacent thereto of the switch by an arc generated when the contacts of the contact elements are operated to be opened or closed, said insulation imparting gas being reactive with said metals or being per se electrically insulative, said gas generating source compound is a metal peroxide, a metal alkoxide hydrolysate, a metal sulfate, a metal sulfide, a metal fluoride, or a fluorine-containing silicate.
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33. An arc extinguishing material for use in a switch comprising a reinforcing filler, a thermoplastic or thermosetting resin, and a gas generating source compound capable of generating an insulation imparting gas combinable with particles of metals which are scattered from contact elements, contacts and other metal components located adjacent thereto of the switch by an arc generated when the contacts of the contact elements are operated to be opened or closed, said insulation imparting gas being reactive with said metals or being per se electrically insulative, said gas generating source compound is a metal peroxide, a metal alkoxide hydrolysate, a metal sulfate, a metal sulfide, a metal fluoride, or a fluorine-containing silicate.
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34. A switch comprising a fixed contact element having a fixed contact joined to the upper surface thereof, a moving contact element having a moving contact joined to the under surface thereof so as to provide electrical contact with the fixed contact, and an arc extinguishing device including a gas generating source material capable of generating an insulation imparting gas combinable with particles of metals which are scattered from the contact elements, contacts and other metal components located adjacent thereto by an arc generated when the contacts of the contact elements are operated to be opened or closed, said insulation imparting gas being reactive with said metals or being per se electrically insulative, the gas generating source material being provided in the vicinity of the contact elements, contacts and other metal components located adjacent thereto and being a metal peroxide, a metal alkoxide hydrolysate, a metal sulfate, a metal sulfide, a metal fluoride, or a fluorine-containing silicate.
- 35. An arc extinguishing plate material comprising 35 to 50% by weight of a reinforcing inorganic material sheet, and 50 to 65% by weight of an inorganic binder composition (B), said arc extinguishing plate material being prepared by pressure-molding and aging of a sheet comprising said reinforcing inorganic material sheet and an inorganic binder composition (A) containing an aqueous solution of a primary metal salt of phosphoric acid or an aqueous solution of a condensed alkali metal phosphate as a binder.
- 41. An arc extinguishing plate material (II) which is obtained by pressure molding and aging an inorganic binder composition (C) comprising 40 to 55% by weight of an insulation imparting gas generating source compound, 25 to 40% by weight of an arc resistant inorganic powder, 8 to 18% by weight of a primary metal salt of phosphoric acid, 5 to 10% by weight of a curing agent for the primary metal salt of phosphoric acid, 2.6 to 12% by weight of water, and 2 to 10% by weight of a reinforcing inorganic fiber.
Specification