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| Number | Title | Issue Date |
| 8044318 | Interrupting chamber of a circuit-breaker having two compression volumes A current interrupting chamber comprising a moving assembly movable axially between a start position and an end position of an operation of opening the circuit-breaker. The current interrupting chamber includes a first compression chamber; a hollow drive tube having... | 10/25/2011 |
| 7507931 | Switching chamber for a gas-insulated high-voltage circuit breaker The switching chamber is intended for a gas-insulated high-voltage circuit breaker. It contains an axially symmetrical housing and a contact arrangement held in the housing with two switching pieces, of which at least one is arranged such that it can move along the ... | 03/24/2009 |
| 7498540 | Gas-blast circuit breaker The gas-blast circuit breaker includes an electrically conductive vessel charged with insulating gases and kept at earth potential, a stationary arc-extinguishing chamber accommodated in a ground metal tank and corresponding to a moving part to extinguish an arc gen... | 03/03/2009 |
| 7202435 | Circuit-breaker An exemplary circuit breaker includes at least one arcing chamber that is filled with isolating gas, extends along a longitudinal axis, is designed to be essentially radially symmetrical, contains an arc area and has at least two power contact pieces. At least one o... | 04/10/2007 |
| 7138597 | Circuit breaker with arc gas propelled movable contact and opposed arc cutoff shutters The support for the moving contact of a circuit breaker has a piston that is driven by arc gases generated by initial separation of the contacts through magnetic repulsion to rapidly open the contacts. A pair of telescoping shield sleeves that have aligned openings ... | 11/21/2006 |
| 6919785 | Pressure sensitive trip mechanism for a rotary breaker A pressure sensitive trip mechanism for actuating a circuit breaker operating mechanism to trip a circuit breaker includes a trip lever and a trip bar. The trip lever is rotatable about a first pivot. The trip bar is positioned proximate the trip lever. The trip bar... | 07/19/2005 |
| 6703575 | Arc-extinguishing system for a contact switching apparatus An arc-extinguishing system for a contact switching apparatus having a plurality pieces of grid plate for arc extinction arranged outside the contact switching apparatus so as to be substantially vertical to a movable contact, and an arc box as well as an... | 03/09/2004 |
| 5850065 | Gas circuit breaker A dielectric gas produced at the time of current interruption is exhausted into an exhaust structure 1 through an opening 8 formed on a fixed-side support member 6 combined with a fixed arcing contact 4. The exhaust structure 1 has an enlarged portion wit... | 12/15/1998 |
| 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 |
| 5181164 | Compartment barrier for padmounted switchgear In an electrical distribution apparatus a switchgear device has a fixed element disposed within a shielded region of an enclosure of the apparatus, and a movable element supported for movement between a closed position in contact with the fixed element an... | 01/19/1993 |
| 4937406 | Insulator-type gas circuit interrupter An insulator-type gas circuit interrupter which comprises a movable contact and a stationary contact for closing and separating a main circuit and an insulator tube in which an arc-extinguishing chamber of a frustoconical configuration is defined. The mov... | 06/26/1990 |
| 4899250 | Gas insulated switchgear with circuit breakers perpendicular to main buses In one-and-a half system gas insulated switchgear, three circuit breakers (3, 4, 5) are parallelly aligned between a pair of main buses (1, 2) with a right angle thereto and connected in series with each other between the main buses.... | 02/06/1990 |
| 4883931 | High pressure arc extinguishing chamber An arc extinguishing chamber for an electrical switchgear device, notably a circuit breaker or a current limiting unit, comprises an almost tightly sealed case made of gas-producing insulating material to house separable contacts with electrodynamic repul... | 11/28/1989 |
| 4777334 | Porcelain clad, gas, circuit interrupter operation rod structure A porcelain clad gas circuit interrupter is disclosed which includes: an arc extinguishing porcelain tube defining therein an arc extinguishing chamber in which a stationary and a movable contact are disposed, the arc extinguishing chamber being filled wi... | 10/11/1988 |
| 4748305 | Gas-blast switch A gas-blast switch has a housing which encloses an arcing chamber, an accumulator space and an expansion space. Two relatively moveable contact members are arranged in the housing. One of the contact members moves through a nozzle. The nozzle is formed of... | 05/31/1988 |
| 4716266 | Electrical arc quenching chamber, in particular for fluid-quenched circuit breakers The present invention relates to an electrical arc interruption chamber, in particular for fluid-quenched circuit breakers, in which, inside a tightly sealed insulating encasing, containing an arc-quenching gas, provided are current-bearing connections, r... | 12/29/1987 |
| 4688136 | Gas insulated switchgear A protective device in a gas insulated switchgear having a housing providing a gas chamber containing a gaseous medium and insulating a bus bar circuit inside the gas chamber. The protective device includes a fault detector outside the gas chamber and con... | 08/18/1987 |
| 4684773 | Gas-blast switch A gas-blast switch preferably suitable for the switching of medium voltage has two switch pieces interacting in an insulating gas filled housing. A fixed switch piece is provided with a hollow space which is connected via channels to a pressure reservoir ... | 08/04/1987 |
| 4652709 | Gas blast switch A gas blast switch, preferably for switching medium voltages, has two cylindrical contacts movable relative to one another along the cylinder axis in a casing filled with extinguishing gas. The contacts are coaxially surrounded by a hot space. The hot spa... | 03/24/1987 |
| 4594488 | High-voltage electric switch with arc extinguishing device using self-generation of a quenching pressure A high-voltage electric switch is proposed comprising an arc extinguishing device using self-generation of a quenching fluid pressure. Inside a container there is formed a compression chamber surrounded by fixed main contacts cooperating with mobile main ... | 06/10/1986 |
| 4563556 | Internal combustion circuit breaker An internal combustion electrical circuit breaker comprising at least one: (a) insulating cylinder; (b) pair of electrical conductors penetrating the cylinder approximately perpendicular to its longitudinal axis at a distance from both cylinder's plane si... | 01/07/1986 |
| 4458121 | DC Circuit breaker A DC circuit breaker of the type using a blown arc-extinguishing gas is disclosed which allows for reliable fast interruption of DC currents through the provision of arc extension current paths. The extension current paths are relatively long and are bent... | 07/03/1984 |
| 4395607 | Gas blast switch The gas blast switch of the invention has an insulating housing which is divided into an arcing enclosure for an auxiliary arc intended to build up the pressure, a storage enclosure for storing fresh quenching gas, a quenching enclosure meant for the quen... | 07/26/1983 |
| 4268732 | Arc quenching chamber for high breaking capacity circuit breakers In a quenching chamber for a high voltage circuit breaker, a pair of separable contoured contacts are held in abutment by springs along a contact surface, a high velocity arc quenching stream flowable between the contact surfaces during the separation the... | 05/19/1981 |
| 4072838 | Electrical power switch with pressurized gas blasting device for lengthening the switching arc An electrical power switch operating with a pressurized gas for actuating the switch contacts and also providing a quenching action in which the arc is lengthened and extinguished includes a container in which the pressurized gas is stored, the outlet fro... | 02/07/1978 |
| 3985988 | Electric circuit breaker assembly A circuit breaker assembly is provided with a pair of contact elements defining therebetween an arc site across which an arc is struck upon separation of the contacts to break the circuit within which the breaker is connected. A compressed gas contained w... | 10/12/1976 |
