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| Number | Title | Issue Date |
| 7777150 | Three-pole apparatus for a medium or high voltage cubicle and associated cubicle comprising such a three-pole apparatus A three-pole apparatus, configured to be installed in a cubicle of an electric substation, comprises an air-insulated three-pole disconnector and a three-pole circuit breaker. The air-insulated three-pole disconnector is configured to isolate an electric line leavin... | 08/17/2010 |
| 7368674 | Compact integral rotational drawout stop device with linear permissive A stop device for an electrical device cell includes a generally flat, rectangular stop member and a generally flat, elongated permissive member. The stop member is, preferably, part of a stop member assembly that includes a biasing device. The cell includes a pair ... | 05/06/2008 |
| 7357656 | Electrical energy disconnection device A disconnection device is designed to separate a first portion of an electrical circuit electrically from a second portion of said circuit, the disconnection device including: at least one pair of contacts, one of which contacts is a moving contact, the pair of cont... | 04/15/2008 |
| 7102101 | High voltage circuit breaker with internal tank heater A high voltage circuit breaker with a gas-insulated tank is provided. Enclosed with the tank is an elongated heater having at least one heating element enclosed in an outer tube. The heater is located coaxially within the tank and is surrounded by the insulating gas... | 09/05/2006 |
| 6995330 | Earthing switch A high for medium voltage gas insulated earthing switch comprises at least one conducting bar in an enclosure, with a corresponding earthing contact and a phase contact fixed to the said bar that will be electrically connected to the earthing contact to earth the sa... | 02/07/2006 |
| 6236562 | Section of a high-voltage system having cooling means and including a conductor The section of an electrical high-voltage system has a gas-filled housing of predominantly symmetrical design. Provided in the housing are a conductor extending along a plane of symmetry of the housing, and cooling means for producing a circulation flow w... | 05/22/2001 |
| 6175486 | Switch gear for medium voltage with separately connectable multiple phases The invention relates to switch gear comprising at least one group of n power switches (4), which extend substantially in a longitudinal direction perpendicular to the front of the switch gear, at least one busbar compartment (13,13') containing n busbars... | 01/16/2001 |
| 5510591 | High tension circuit breaker capable of interrupting fault currents having a delayed zero crossing The invention relates to a high tension circuit breaker capable of interrupting alternating fault currents which have a pseudo period T. The faults occur at an instant t0 and delay the zero crossing of the current after a maximum time lapse of ... | 04/23/1996 |
| 5357068 | Sulfur hexafluoride isolating circuit-breaker and use thereof in prefabricated stations, substations, and bays A sulfur hexafluoride isolating circuit-breaker comprises an SF6 -filled gastight case for each cell containing fixed contacts and arcing contacts, the poles are fixed to a common grounded metal bar capable of pivoting between two end walls of ... | 10/18/1994 |
| 5298703 | Gas circuit breaker A three-phase common tank type gas circuit breaker has a grounded tank filled with an insulating gas and accommodating three interrupter assemblies for three phases of the electric power. Each assembly includes a parallel electrical connection of an inter... | 03/29/1994 |
| 5084600 | Gas-blast load-break switch A gas-blast load-break switch comprises a pressure storage chamber for storing pressure of arc-extinguishing gas with arc energy generated by the disconnection between contacts, and a suction chamber including a piston which is moved in connection with th... | 01/28/1992 |
| 5023415 | Switch apparatus A switch apparatus for use in a distribution system, having a case, a pair of bushings arranged on the case so as to oppose each other, and a breaker arranged in the case such that breaking and closing actions take place in a direction perpendicular to an... | 06/11/1991 |
| 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 |
| 4779197 | Three-phase-enclosure type gas insulated switchgear A three-phase-enclosure type gas insulated switchgear in which high-voltage conductors in a metallic vessel are disposed in parallel to each other to pass through apexes of a substantially right angled equilateral triangle, and in which each of the high-v... | 10/18/1988 |
| 4774627 | Metal-encapsulated switching apparatus A metal-encapsulated switching apparatus includes a housing having first and second opposite ends, a first insulator disposed at the first end and a second insulator disposed at the second end. First terminals are supported on the first insulator. First p... | 09/27/1988 |
| 4745522 | Gas-insulated switchgear apparatus A gas insulated switchgear apparatus, in particular a phase-separated, double main bus-type switchgear apparatus, in which first and second phase-separated main buses are interchangeable and are arranged in horizontal planes in such a manner as to reduce ... | 05/17/1988 |
| 4742423 | Gas insulated apparatus A gas insulated apparatus for high voltage, 3-phase applications in which an insulating, self-arc-extinguishing gas separates the high voltage lines from grounded vessels. According to the invention, the transverse impedance of the vessels is chosen so th... | 05/03/1988 |
| 4678876 | Isolating switch apparatus for a high-voltage switching system which may be insulated with SF6 gas An isolating switch apparatus, includes an encapsulation having at least one disconnection point and a plurality of contact points corresponding to a given number of phases therein, a plurality of phase conductors at least partially disposed in the encaps... | 07/07/1987 |
| 4612428 | Compressed gas circuit breaker able to be assembled and disassembled without a significant loss of gas The circuit breaker comprises first (2A) and second (2B) compressed-gas-filled enclosures, said first enclosure containing fixed contacts and a moving assembly comprising contacts cooperating with said fixed contacts, which moving assembly is movable by m... | 09/16/1986 |
| 4570042 | Gas-insulated switching apparatus A gas-insulated switching apparatus comprises gas-insulated interrupters, gas-insulated buses and gas-insulated disconnecting switches, whereby the movable electrode side terminals of all the disconnecting switches accommodated in the apparatus are so arr... | 02/11/1986 |
| 4440998 | Segmented circuit breaker housing with rotatably adjustable bushing positions A multi-pole circuit breaker has interrupters contained in respective housing sections which have two bushings extending perpendicularly from either end of the housing section. Each housing section is segmented at its center so that the two halves which a... | 04/03/1984 |
| 4429199 | Three-pole cable connecting unit for a three-pole metal-encapsulated, high-voltage switching installation A three-pole cable connecting unit for a compressed gas-insulated high-voltage switching installation is disclosed having three cable connecting elements, a three-pole isolating switch and (optionally) a three-pole ground mechanism, as well as two three-p... | 01/31/1984 |
| 4417111 | Three-phase combined type circuit breaker A three-phase combined type circuit breaker is disclosed which comprises a common housing, three-phase interrupting units in said common housing, movable contacts of the interrupting units connected through link mechanisms to operating devices for three p... | 11/22/1983 |
| 4184058 | Polyphase isolator switches A polyphase, e.g. three phase, isolator switch, of which the movable contact members of all phases extend through a common bushing insulator mounted in a partition between two compartments for rotation about an axis normal to said partition and are simult... | 01/15/1980 |
| 4027125 | Gas insulated circuit breaker A single pull rod mechanism for actuating the contacts of each phase of a three-phase gas insulated circuit breaker arrangement utilizes acceleration springs only in relation to the second and third phases. Contact parting velocity is measured externally ... | 05/31/1977 |
| 4024365 | Compressed-gas multiphase circuit-breaker installation An improved multiphase compressed-gas circuit-interrupter installation is provided having compact, serviceable and inexpensive operating arrangements with an improved gas-leakage detection arrangement and system for detecting a loss of high-pressure gas i... | 05/17/1977 |
| 4007346 | Encapsulated switching installation Encapsulated switching installation with a substantially cylindrical tank which is insulatingly sealed at both ends and a switching device accommodated within the tank, which by means of contacts can be connected to the conductor of throughpassages secure... | 02/08/1977 |
