Class 218/85 - Arc extinguishing medium

Subclass of Class 218 - High-voltage switches with arc preventing or extinguishing devices
Definition: Subject matter comprising a specific material or substance
No. of patents: 24
Last issue date: 07/13/2010

Number	Title	Issue Date
7754991	Medium-voltage or high voltage electrical switchgear This electrical switchgear has an interrupting chamber enclosing an interrupting gas (G) substantially devoid of SF6 and of CF4, and a first arcing contact (10) and a second arcing contact (18), the two arcing contacts moving caus...	07/13/2010
7211614	Insulating nozzle for gas blast circuit breaker The invention concerns an insulating nozzle for a gas blast circuit breaker. In accordance with the invention, the material constituting the nozzle comprises (A) 90% to 99.9% by weight of a fluorinated polymer, and (B) 0.1% to 10% by weight of a filler based on at l...	05/01/2007
6797909	High-voltage loadbreak switch with enhanced arc suppression A high-voltage loadbreak switch operates submersed in a dielectric fluid and may be configured to switch one or more phases of power using one or more phase switches. Each phase switch may include first and second stationary contacts. The first stationary contact ma...	09/28/2004
6252190	Electrical high speed circuit breaker with explosive charges including ablative arc extinguishing material A simple high-speed circuit breaker which is cheap to produce is specified for alternating currents which have to be switched off, which switches such currents off within one half-cycle at the current zero crossing, by means of a gas-generating explosive ...	06/26/2001
6107590	Circuit-breaker with an explosive charge ignited during opening operation Extending between a fixed tulip contact (1) and a slide tulip (4) is an arcing chamber (5) which is occupied in the closed position by a movable contact pin (3) which fills up both an exhaust (9) surrounded by the slide tulip (4) and a blowout opening (7)...	08/22/2000
5828026	Stock giving off arc-extinguishing gas, and gas-blast circuit breaker comprising such a stock The stock contains an insulating-material matrix and a filler embedded in the matrix and is distinguished by a cellular structure. The predominant portion of the cells is filled with a material having arc-extinguishing properties or contains a material wh...	10/27/1998
5629506	Low voltage AC contactor including high recovery voltage gas system An AC contactor having a high recovery voltage strength includes a contact assembly and a high recovery voltage gas system coupled to the contact assembly. The contact assembly includes two contact pads per electrical phase, with one of the contact pads b...	05/13/1997
4931687	Spark gap switch having a two-phase fluid flow A two-phase fluid is injected into a volume upstream of the spark gap flow channel of a spark switch. The injected two-phase flow can be separated, causing the liquid component of the two-phase fluid to form a layer adjacent the wall of the flow channel a...	06/05/1990
4831220	High-voltage compressed-gas circuit breaker A high-voltage compressed-gas circuit breaker having a filter accommodated in a separate housing for the purification of the gas in the gas space of the circuit breaker. For easy accessibility, the housing of the filter is attached at the housing of the c...	05/16/1989
4700029	High-tension circuit-breaker having arc-extinguishing gas under pressure A high-tension circuit-breaker having dielectric gas under pressure, the circuit-breaker comprising at least one assembled pair of first and second superposed insulating columns, the first column (3) acting as a support and the second column enclosing a c...	10/13/1987
4698468	Sulphur hexafluoride circuit breaker usable at very low outside temperatures A sulphur hexafluoride circuit breaker usable at very low outside temperatures, the circuit breaker comprising: a sealed enclosure containing a fixed contact assembly and a moving contact assembly; a drive rod for driving the moving contact assembly, said rod ...	10/06/1987
4618753	Insulating chamber This invention deals with a new chamber meant to be used in insulating operation shafts or rods, with a view to disconnect electric switches, connect them again, or, besides, to act as contactors, so as to extinguish the electric are formed during the ope...	10/21/1986
4562322	SF₆ Gas arc extinguishing electric apparatus and process for producing the same A SF6 gas insulating electric apparatus usable as a circuit breaker, etc., containing a SF6 gas insulator and a resin insulator, both of which insulators are present in an atmosphere to be exposed to arcs, characterized by making at ...	12/31/1985
4547316	Insulating gas for electric device An insulating gas for an electric device which comprises pentafluoropropionitrile or a mixture of pentafluoropropionitrile and sulfur hexafluoride and at least one nitrite ester selected from methyl nitrite, ethyl nitrite, propyl nitrite, butyl nitrite, a...	10/15/1985
4495435	Plasma switch A plasma switch includes means to introduce a cloud of particulate AII3 or AlCl3 and SiO2 is to a conductive gas discharge. The chemicals undergo a plasma reaction and generate SiI4 or SiCl4 both of w...	01/22/1985
4204084	Apparatus with dielectric gas mixtures in substantially uniform field Dielectric gas mixtures are described with improved dielectric strength in uniform fields compared to pure sulfur hexafluoride. Sulfur hexafluoride is mixed with about 1 to about 10 mole % of a noble gas such as helium, argon, krypton or neon and used in ...	05/20/1980
4166798	Electrical device with fluorinated divalent sulfur dielectric gas Electronegative, normally gaseous, fluorinated compounds with sulfur at valence state 2 act as good dielectric gases alone or in combination with sulfur hexafluoride. In particular bis (trifluoromethyl) sulfide has a higher dielectric strength than sulfur...	09/04/1979
4110580	Gas-type circuit-interrupters having admixtures of helium with small concentrations of sulfur-hexafluoride (SF₆) gas An improved gas-type circuit-interrupter is provided utilizing a mixture of helium and sulfur-hexafluoride (SF6) gases, with the percentage concentration of sulfur-hexafluoride (SF6) gas being 10%, or less, by volume. The improved ga...	08/29/1978
4104238	Silica-alumina trihydrate filled epoxy castings resistant to arced SF₆ A cured, insulating, casting composition, having a coefficient of linear thermal expansion of below about 38 × 10-6 in./in./° C and being resistant to arced sulfur hexafluoride gas, in contact with a metal surface in a sulfur hexafluoride gas...	08/01/1978
4071461	Gaseous dielectric mixtures for suppressing carbon formation Carbon formation on voltage breakdown and sparking, and consequent carbon deposits on insulators and other surfaces, is suppressed in dielectric gases of halogenated alkanes by adding SF6 and/or CO2 to the halogenated alkane to form ...	01/31/1978
4052555	Gaseous dielectric compositions Perfluorinated ethers evidence useful properties as gaseous dielectrics and do not exhibit a high carbon tracking tendency, which is commonly a problem with halogenated alkanes. Mixtures of the perfluorinated ethers with SF6 and/or CO2	10/04/1977
3995130	Arc quenching chamber component structure for circuit breakers operating with pressurized gas A structural component such as nozzle-forming member to be utilized in conjunction with the arc quenching chamber of an electrical circuit breaker operating with a pressurized gaseous fluid such as SF6 and made from a polytetrafluoroethylene co...	11/30/1976
3968381	Arc type switch An arc type switch has means to inject an auxiliary plasma between the main switch electrodes with high initial velocity. The switch conduction is initiated through a plasma that is already in motion along the surfaces of the main electrodes thereby reduc...	07/06/1976
3944886	Protection apparatus for a capacitor connected in series with an electric power circuit A protecting apparatus for a series capacitor in an AC power circuit includes an enclosure filled with a low pressure insulating gas. A discharge gap device, a bypass switch for the series capacitor and an electromagnetic repulsion device for closing the ...	03/16/1976

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Class 218/85 - Arc extinguishing medium