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| Number | Title | Issue Date |
| 7414827 | Gas-insulated switchgear device Disclosed is a gas-insulated switchgear device, in which a space for dismantlement and inspection work which facilitates the dismantlement and inspection work of circuit breakers at the time of the occurrence of accidents of the circuit breakers are provided and an ... | 08/19/2008 |
| 7154061 | Interrupter assembly for a circuit breaker A preferred embodiment of an interrupter assembly for a circuit breaker includes a first contact, a conductor, and a second contact mounted on the conductor. The second contact and the conductor are movable in relation to the first contact between a first position w... | 12/26/2006 |
| 7041928 | Interrupter unit for a high-voltage power switch An interrupter unit (1) for a high-voltage power switch supported by a supporting element (5,6) radially surrounding the interrupter element (1) and consisting of two sections (5a, 5b, 6a, 6b | 05/09/2006 |
| 6631075 | Switchgear The instrumentation transformers 6a to 6d and 7a to 7f for measuring the voltage of the main circuit are arranged within the container 15b located in the midst of the containers 15a to 15c. In the present invention, the containers 15a and 15b are linked b... | 10/07/2003 |
| 6459569 | Switchgear The instrumentation transformers 6a to 6d and 7a to 7f for measuring the voltage of the main circuit are arranged within the container 15b located in the midst of the containers 15a to 15c. In the present invention, the containers 15a and 15b are linked b... | 10/01/2002 |
| 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 |
| 6111212 | Interrupt assembly for a primary circuit breaker An interrupt assembly for a primary circuit breaker of a distribution transformer includes an elongated housing that is divided into separate chambers for holding insulating fluid that extinguish an arc generated when a high-voltage electrical path betwee... | 08/29/2000 |
| 5936217 | Switching apparatus and activation suppression method for electric contact A switching apparatus wherein the life and the reliability of an electric contact are improved by fundamentally suppressing formation of black powder and activation of the surface of the contact by a chemical reaction. Microcapsules in which organic acid ... | 08/10/1999 |
| 5717183 | High-voltage power switch with a cooling device for cooling the quenching gas An electric high-voltage power switch has two contacts and at least one gas outlet for quenching gas heated by the arc generated between the contacts. A cooling device is provided for cooling the quenching gas. The cooling device is formed of a metal body... | 02/10/1998 |
| 4935165 | Method for preventing the poor conduction at electrical switch contacts which is caused by organopolysiloxane gas The poor electrical conduction at an electrical switch contact caused by organopolysiloxane gas can be prevented by providing that a nitrogenous base gas be simultaneously present with the organopolysiloxane gas. Nitrogeneous base gases can be aliphatic a... | 06/19/1990 |
| 4845460 | Multipole low-voltage circuit breaker with an insulating material housing and arc-quenching chambers A multipole low-voltage circuit breaker with an insulating material housing and arc quenching chambers. By a new mechanical design, the installation of the arc quenching devices is to be facilitated. All arc quenching chambers of a switchgear are arranged... | 07/04/1989 |
| 4788392 | Tank type gas circuit breaker A tank type gas circuit breaker for a three-phase alternating current, comprises: three hollow members spaced in parallel with each other; a single stationary side end plate air-tightly fixed to first ends of the three hollow members; a single mechanism s... | 11/29/1988 |
| 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 |
| 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 |
| 4604508 | Electric circuit breaker of the type using an arc quenching fluid with pressure self-generating due to the breakdown of the fluid In an electric circuit breaker of the type using an arc quenching fluid with pressure self-generating by the breakdown of the fluid due to the same arc, comprising, inside a tightly sealed insulating casing filled with the extinguishing fluid, in particul... | 08/05/1986 |
| 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 |
| 4553008 | Load interrupter An load interrupter is disclosed having the characteristics of an ordinary puffer interrupter and a self-extinguishing gas flow interrupter. The load interrupter comprises a generally hollow cylinder which is adapted to be filled with an arc extinguishing... | 11/12/1985 |
| 4485283 | Current limiter unit A current limiter unit employs both a magnetic repulsion field and a gas pressure force to direct arcs to within the high voltage region of an arc chute. The unit confines the evolved gas pressure in all directions except in the direction of the arc plate... | 11/27/1984 |
| 4465910 | Self-generating gas flow interrupter An electrical circuit interrupter is disclosed having the characteristic of a puffer interrupter and a self-extinguishing gas flow interrupter. The interrupter comprises a generally hollow movable cylinder which is adapted to be filled with an arc extingu... | 08/14/1984 |
| 4459447 | Self extinguishing type gas circuit breaker A self extinguishing type gas circuit breaker includes a body member having a first end connected to a terminal plate and a second end with a nozzle formed of electrical insulation material and defining a nozzle opening in communication with the interior ... | 07/10/1984 |
| 4444671 | Arc extinguishing material An arc quenching composition suitable for deionizing and extinguishing a high voltage electrical arc comprising an effective proportion of hexamethylenetetramine. Depending on the application in which the arc extinguishing composition is employed, the hex... | 04/24/1984 |
| 4436831 | Calcined member for arc-extinguishing chambers A calcined member for arc-extinguishing chambers which are installed in electromagnetic contactors and magnetic circuit breakers for high-voltage applications. The calcined member consists of an inorganic composite material obtained by molding and heat-tr... | 03/13/1984 |
| 4413062 | Molding composition and product produced therefrom A ceramic useful as an electrically insulating material is produced by calcining wollastonite powder, admixing the calcined powder with phosphoric acid of certain P2 O5 concentration range, die-pressing the resulting mixture, and fir... | 11/01/1983 |
| 4375023 | Gas-blast switch A movable, tubular-shaped contact element is displaceably guided in a partition wall subdividing the internal space of the gas-blast switch housing into an extinguishing chamber and an expansion chamber. During the cut-off stroke a current connection prev... | 02/22/1983 |
| 4313099 | Current limiting fuse having aluminum sulfate arc-quenching filler A current limiting fuse construction including a fuse element extending between electrically conductive terminals carries a body of arc-quenching filler material within a hollow casing of electrical insulating material. The filler material includes a firs... | 01/26/1982 |
| 4306130 | Arc self-extinguishing switch device A switch comprises an envelope including a pressure increasing compartment filled with an arc extinguishing fluid. A slit extends through one longitudinal side of the envelope to communicate with the compartment. A movable contact member having a flat cro... | 12/15/1981 |
| 4280098 | Coaxial spark gap switch The switch is usable for switching currents of 40 kiloamperes at 250 kilovolts to produce current pulses a few nanoseconds in duration at kilohertz rates. In a preferred embodiment, the switch includes three independently-triggerable spark gaps which are ... | 07/21/1981 |
| 4202591 | Apparatus for the remote grounding, connection and disconnection of high voltage electrical circuits A high voltage electrical connector of the type employed to connect a high voltage cable to the terminal of an electrical apparatus, such as a transformer, in a power distribution circuit is provided with a connector element which enables a ground connect... | 05/13/1980 |
| 4192572 | Electrical connector apparatus Apparatus for connecting and disconnecting a male contact element and a high voltage cable includes a housing securable to the cable and defining an axial passage having a cavity, a piston assembly with a female contact element movable in the passage and ... | 03/11/1980 |
| 4186985 | Electrical connector Disclosed herein is a female electrical connector for separably connecting a male contact element with a high voltage circuit. The connector comprises a conductive housing having a first end adapted to receive the male contact element, a second end adapte... | 02/05/1980 |
| 4170394 | High voltage separable connector system with modified dwell position A separable electrical connector assembly includes mating rod connector and bore switch modules. The bore switch module includes a grasping bore contact member for electrically engaging with a rod contact member which is included in the rod connector modu... | 10/09/1979 |
| 4143256 | Arc chute having plates coated with weld deterent material An arc chute for assisting in the extinction of an arc drawn between circuit interrupting contacts opening in air includes a stack of closely spaced metallic plates coated with a weld deterent material, such as silicone varnish. By virtue of this coating,... | 03/06/1979 |
| 4131329 | Current interchange for a gas actuated bushing A high voltage bushing for an electrical device such as a transformer, the bushing including a fixed cylindrical conductor and a gas actuated bore contact mounted for reciprocal movement in the conductor and a fixed current interchange device in the form ... | 12/26/1978 |
| 4119358 | Electrical connector switching module A connector module for loadbreak operation having an insulating housing and a switch insert. The insert includes a container with a major portion of uniform diameter and a configuration such that the diameter does not increase from its outer end to its in... | 10/10/1978 |
| 4116515 | Spring actuated contact for high voltage bushing A high voltage bushing having a bore contact mounted for axial movement within the bushing housing, the bore contact being biased for movement into engagement with a rod contact and a magnetically responsive trip mechanism releasably engaging the bore con... | 09/26/1978 |
| 4068913 | Electrical connector apparatus Apparatus for connecting and disconnecting a male contact element and a high voltage cable includes a housing securable to the cable and defining an axial passage having a cavity, a piston assembly with a female contact element movable in the passage and ... | 01/17/1978 |
| 4066322 | Male contact assembly for use in loadbreak A male contact assembly for high voltage switching applications includes a male contact with an electrically insulative member arranged concentrically with the contact and extending longitudinally therefrom. The insulative member has a hollow interior adj... | 01/03/1978 |
| 4059816 | Electrical loadbreak fuse and canister assembly An electrical loadbreak fuse and canister assembly with arc quenching means operative upon withdrawal of the fuse from the canister or upon insertion of the fuse in the canister under either load or fault conditions. The canister, formed of a glass filled... | 11/22/1977 |
| 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 |
| 4045113 | Connector safety tip A safety tip for a connector contact of the type having a conductive body surrounding the contact is provided. The tip is made of an insulating material, preferably plastic.... | 08/30/1977 |
