| Patent Number |
Title Of Patent |
Date Issued |
| 6339202 |
Composite material insulative jacket for generator circuit-breakers |
January 15, 2002 |
| A composite material tubular insulative jacket contains a dielectric gas under pressure and electrical switchgear and includes a metallic collar fixed to one end at least and provided with a member for fixing the collar to a support member. A seal is disposed between the support member a |
| 6205846 |
Method of determining with great accuracy the rate of leakage from the case of an electrical app |
March 27, 2001 |
| In the method, pairs of pressure and temperature values are recorded using a pressure sensor and a temperature sensor fixed to a case from the outside and communicating with a dielectric gas, thereby enabling a density value to be calculated for the dielectric gas corresponding to ea |
| 6125692 |
Density sensor for monitoring the rate of leakage from a switchgear case with improved reliabili |
October 3, 2000 |
| A density sensor for monitoring a rate of leakage from the case of electrical switchgear filled with dielectric gas under pressure, the sensor comprising a fixing support mounted from the outside in the thickness of the case and communicating with the dielectric gas. A radiator is pl |
| 6121566 |
Switchgear for a power station generator and a transformer, with a three-position disconnector c |
September 19, 2000 |
| The switchgear comprises a circuit breaker connected between a generator and a transformer, together with a disconnector connected between the circuit breaker and the transformer, the disconnector having a fixed pole common to three positions: a first position and a second position r |
| 6118257 |
Switchgear for a power station generator and a transformer with a three-position disconnector |
September 12, 2000 |
| The switchgear comprises a circuit breaker having an open position for isolating a generator from the network, and a closed position for connecting the generator to the network, together with a disconnector having a fixed pole connected to the generator and a contact connected to the |
| 6091039 |
Gas-insulated line with an incorporated power capacitor and circuit breaker |
July 18, 2000 |
| The gas-insulated line comprises a conductor (1A) disposed inside a case (3A) filled with a dielectric gas under pressure. A power capacitor (5) is electrically connected to the conductor while being disposed inside a compartment (3P) secured to the case (3A) and filled with a dielectric |
| 6064025 |
Control means for electrical equipment, E.G. for a high-voltage circuit-breaker |
May 16, 2000 |
| A controller for electrical equipment, in particular for a high-voltage circuit-breaker, the equipment being housed in a casing filled with a dielectric gas under pressure. An interrupting chamber within the casing extinguishes arcs produced by the main circuit-breaker contacts. The |
| 6064010 |
Composite insulator end fitting |
May 16, 2000 |
| An end fitting having a bore that forms a sleeve for the shank of an electrical insulator of composite structure. The bore has a substantially frustoconical wall that flares away from the bore opening towards the end wall of the bore and has an annular swelling directed towards the insid |
| 6023404 |
Method of monitoring and diagnosing the operation of high voltage electrical apparatus |
February 8, 2000 |
| During opening or closing of the apparatus, in particular a circuit breaker while it is electrically isolated, the method consists in:i) recording a signal representative of the variation over time of the pressure inside the interrupter chamber by means of a sensor disposed outside the i |
| 6018133 |
Low-compression puffer circuit-breaker |
January 25, 2000 |
| A circuit-breaker of the puffer type, comprising two arcing contacts, at least one of the arcing contacts being part of a moving contact assembly made up of a first tube co-operating with a second tube to define a blast chamber, and a compression chamber closed by a semi-moving piston, t |
| 6016247 |
Electricity distribution substation |
January 18, 2000 |
| A substation of the "one-and-one-half breaker" type has three identical gastight cubicles in the form of a rectangular parallelepipeds (11, 11', 11") each containing one circuit breaker and two disconnects, and each having electricity lead-ins for connecting the disconnectors with extern |
| 6015960 |
Compressed gas interrupter with a rack mechanism |
January 18, 2000 |
| A compressed gas interrupter having a first contact piece having a hollow wear contact into which, during closure, there is inserted a rod-shaped wear contact provided on a second contact piece, an insulating nozzle on the same axis as the two contact pieces and fixed to the first contac |
| 6013888 |
Generator circuit breaker having a single mechanical control mechanism |
January 11, 2000 |
| A circuit breaker comprising a first permanent current contact and a first arcing contact that are fixed, a second permanent current contact and a second arcing contact that are movable in a longitudinal direction to be connected with or separated from the fixed contacts, and a mechanism |
| 6005307 |
Switching system including a current-injecting disconnector integrated in a circuit breaker for |
December 21, 1999 |
| A switching system having a plurality of positions for separating or interconnecting a generator, a network transformer, and a starter device, the system including a circuit breaker for the generator and a busbar disconnector for separating or interconnecting the generator and the ne |
| 5997616 |
Moisture absorption device for electrical apparatus containing dielectric gas |
December 7, 1999 |
| A molecular sieve moisture absorption device for electrical apparatus containing a dielectric gas includes a box in which the molecular sieve is placed. The box is closed by a plate provided with a valve through which the inside of the box is evacuated. The plate is held in place on a |
| 5994999 |
Low voltage link for transmitting on/off orders |
November 30, 1999 |
| A low voltage link for converting on/off orders between a relay building and remote high or medium voltage electrical disconnection apparatus, the link being mainly constituted by a bundle of electrical lines extending from the building to the remote apparatus, each line serving to conve |
| 5977862 |
Polymer high voltage current limiters packaged in series |
November 2, 1999 |
| A polymer high voltage current limiter comprising, per phase, a fast circuit-breaker pole, a semi-fast protection circuit-breaker pole, and a set of polymer-based elements having very low resistivity, filled with carbon black, and connected in series and in parallel, wherein each ele |
| 5959274 |
Operating mechanism for high-voltage circuit-breakers |
September 28, 1999 |
| Operating mechanism for actuating an operating rod (13) of a circuit-breaker including at least one interrupter chamber filled with a pressurized dielectric gas, said operating mechanism using a tripping spring (21) held charged when the circuit-breaker is closed by a selectively ope |
| 5955715 |
Circuit breaker having a closure resistance |
September 21, 1999 |
| A circuit breaker which includes first arcing and permanent contacts that are mounted stationary inside an enclosure, second arcing and permanent contacts that are mounted to move inside the enclosure along a longitudinal direction and designed to co-operate with the first contacts, |
| 5952635 |
Generator circuit breaker |
September 14, 1999 |
| The generator circuit breaker includes synchronization means for separating its main contacts before its arcing contacts are separated. It has a lever which is hinged at one of its ends to a fixed contact piece and which is constrained to move firstly with the moving main contact and sec |
| 5952606 |
Gas-insulated electric cable |
September 14, 1999 |
| A gas-insulated cable having a plurality of lengths connected end to end, each length containing three conductors with the ends of the conductors of a length having respective metal endpieces engaging in respective cylindrical terminal metal portions of the corresponding conductors of th |
| 5939692 |
Gas-filled interrupter with compressible thermal expansion chamber |
August 17, 1999 |
| A compressed gas interrupter comprises two contact assemblies each including at least one wear contact and one of which is mobile along an axis relative to the other, which is fixed. The mobile contact assembly is moved along the axis by an insulative maneuvering rod and has a gas co |
| 5936213 |
Operating mechanism for a five-pole phase inverter isolating switch |
August 10, 1999 |
| An electric switch for use in a five-pole isolating switch used as a phase inverter has a fixed contact and a mobile contact cooperating with the fixed contact to open or close an electrical line. The mobile contact is moved in a longitudinal direction by an articulated pair of levers. A |
| 5930415 |
Monitoring device for a gas-insulated cable |
July 27, 1999 |
| A gas-insulated cable includes a plurality of sections separated by sealed partitions, each section including a cylindrical steel case, a cylindrical aluminum screen coaxial with and inside the case and three conductors. A monitoring device includes, between the case and the screen, opti |
| 5916397 |
Method of manufacturing an insulator made of a composite material |
June 29, 1999 |
| The present invention relates to a method of manufacturing an insulator made of a composite material and including a cylindrical casing provided with annular fins. The method includes the steps of manufacturing an epoxy resin cylinder provided with epoxy resin annular fins covering the |
| 5910872 |
Method of discriminating between an internal arc and an interruption arc detected inside a metal |
June 8, 1999 |
| A method of discriminating an arc detected in metal-clad equipment includes detecting an arc, generating an arc-appearance signal, transmitting the arc-appearance signal to a computer, and determining a time lapse T. The time lapse T is determined according to the formula t.sub.o -t.sub. |
| 5898556 |
Protection system for a three-phase distribution transformer insulated in a liquid dielectric |
April 27, 1999 |
| A protection system for a three-phase distribution transformer immersed in a liquid dielectric contained in a tank, at least two of the three phases being equipped on the high voltage side of the transformer with respective current-limiting fuses. On each of the two phases equipped with |
| 5898151 |
Circuit-breaker with a disconnector |
April 27, 1999 |
| A circuit-breaker including main contacts and arcing contacts includes a shaft carrying a first lever connected to the moving main contact. A hub is mounted inside the shaft and carries a second lever connected to the moving arcing contact; the shaft and the hub being shaped over a certa |
| 5889467 |
Method of monitoring a leakage rate from the envelope of high voltage electrical apparatus |
March 30, 1999 |
| The method consists in: i) making a series of recordings of the density of the gas at regular time intervals during a nighttime period by means of a temperature-compensated pressure sensor fixed on the outside of the envelope and communicating with the gas via a duct formed through the |
| 5877465 |
High-tension circuit-breaker with damper |
March 2, 1999 |
| A high-tension circuit-breaker includes fixed contacts and a mobile assembly including mobile contacts. The mobile assembly is connected to an operating mechanism by an operating rod. The circuit-breaker includes a device for damping movement of the rod at the end of a tripping maneuver. |
| 5859591 |
Control device for high-voltage equipment including a display panel |
January 12, 1999 |
| A control device for high-voltage equipment includes a computer adapted to receive status information from the equipment via at least one transmission cable. A display system includes a support device carrying on its visible face an equipment status mimic diagram associated with indi |
| 5859399 |
Circuit breaker having semi-moving piston |
January 12, 1999 |
| A puffer type circuit breaker comprising a compression chamber closed by a pressure wall of a semi-moving piston, a first mechanism for preventing the piston from moving during a first portion of the opening displacement of the moving contact assembly, and a second mechanism for axially |
| 5841614 |
High voltage circuit breaker with insertion of resistance on closure |
November 24, 1998 |
| A high voltage circuit breaker with insertion of resistance on closing, wherein the resistance is inserted by a fixed insertion electrode co-operating with the end of the moving main contact, the blast nozzle and the arcing contact of the moving assembly being secured to each other, and |
| 5834909 |
Device for actuating electrical equipment, in particular a high-voltage section switch or a high |
November 10, 1998 |
| A system for actuating electrical equipment, in particular a high-voltage section switch or a high-voltage grounding section switch includes, in a control box, a rotary drive unit for driving the contacts of the equipment. A control circuit includes "end-of-stroke" contacts associated |
| 5828540 |
Method of protecting against failure of a circuit breaker |
October 27, 1998 |
| The invention relates to a method of protecting against circuit breaker failure, said circuit breaker having contacts capable of moving between a closed position and an open position, and vice versa, and being fitted with protection apparatus including fault detector apparatus for puttin |
| 5808257 |
High-voltage gas-blast circuit-breaker |
September 15, 1998 |
| A gas-blast gas-insulated high-voltage circuit-breaker comprises a fixed main contact, a fixed arc contact and a mobile assembly comprising a main contact, an arc contact and a compression volume cooperating with a fixed piston and communicating with a blast volume leading to a blast noz |
| 5780799 |
Reduced autocompression circuit-breaker |
July 14, 1998 |
| This present invention concerns a circuit-breaker of the self-blasting type including a system for immobilizing the semi-mobile piston during a first part of displacement of the mobile contact assembly between the closed position and the open position and for displacing the piston axiall |
| 5756952 |
Straight spring operating mechanism for high-voltage circuit-breakers |
May 26, 1998 |
| An operating mechanism for a circuit-breaker, for carrying out an O-C-O cycle, followed by a C-O cycle, includes a tripping spring and a setting spring, coaxial with each other. Expansion of the setting spring compresses the tripping spring. The setting spring is compressed by an arr |
| 5753860 |
Conductor bar for a metal-clad high voltage electrical apparatus |
May 19, 1998 |
| A conductor bar for a metal-clad high voltage electrical apparatus, the bar including a metal tubular cylinder of diameter (D) provided at at least one of its ends with a connection flange for connection to an insulator. Between an end and the flange, the bar presents a cylindrical porti |
| 5742017 |
Circuit-breaker provided with a closure resistance having an insertion assembly |
April 21, 1998 |
| A circuit-breaker including a moving assembly having a moving main contact (14) electrically connected to a first terminal (2A), a fixed assembly having a fixed arcing contact electrically connected to a resistance (5) which is connected to a second terminal (3A), and a temporary inserti |
| 5742001 |
Buried electrical transmission line equipped with a cooling device |
April 21, 1998 |
| A buried armored power transmission line includes a metal jacket housing at least one conductive busbar. The line is equipped with a cooling device operating by transferring heat from the jacket to the surface of the soil, including a metallic structure fixed to the jacket and extending |
| 5739489 |
Rotary mechanism for driving signalling contacts of an electrical apparatus, in particular a hig |
April 14, 1998 |
| A drive mechanism for driving a rotary signalling switch of a high voltage electrical apparatus, in particular a disconnector or a grounding switch, the mechanism connecting the rotary shaft of the signalling switch to a rotary actuator shaft of an actuator mechanism for actuating the co |
| 5736704 |
Circuit-breaker with grounded metal enclosure |
April 7, 1998 |
| A grounded metal enclosure circuit-breaker comprises, for each pole, a metal enclosure having two insulative bushings. The enclosure and the bushings are adapted to be filled with insulative gas. The enclosure contains first and second metal supports and a set of fixed contacts and a |
| 5729477 |
Method and apparatus for eliminating a disturbing component from a periodic signal, and applicat |
March 17, 1998 |
| A method of eliminating a disturbing component from a periodic signal. The method includes the steps performing at least two measurements on the signal at two distinct instants, calculating the parameters of the disturbing component on the basis of the measurements, and subtracting the |
| 5726575 |
Path for acquiring a voltage pulse, and a method and a system for measuring partial discharges a |
March 10, 1998 |
| The invention relates to an acquisition path for acquiring a voltage pulse, and to a system and a method making use of said path, the path comprises:a path input for a pulse signal;a module for determining the polarity and for limiting acquisition of the input signal;a control module for con |
| 5717184 |
High-voltage circuit-breaker that inserts a resistance on closure |
February 10, 1998 |
| The present invention relates to a high-voltage circuit-breaker including a casing that is filled with a dielectric gas and that contains a first arcing contact and a second arcing contact, which arcing contacts are mounted to move in opposite directions from an open position to a closed |
| 5715134 |
Screened medium-voltage substation |
February 3, 1998 |
| A medium-voltage substation includes at least two insulative material chambers each provided with at least one opening for the gas-tight passage of a set of three-phase busbars. Each chamber contains a three-position three-phase switch for connecting the busbars to first gas-tight el |
| 5693873 |
Method and a system for determining the density of an insulating gas in an electrical apparatus |
December 2, 1997 |
| A method and a system for determining the density of an insulating gas in electrical apparatus in the vicinity of parts carrying electrical current, the method comprising the following steps:a) a reference temperature is measured outside the apparatus and in the vicinity thereof;b) the c |
| 5684270 |
Joint with a boss for a long distance gas-insulated three-phase cable |
November 4, 1997 |
| A joint with a boss for fitting to an assembly compartment for assembling together two adjacent lengths of a long-distance gas-insulated three-phase cable, the joint including a boss containing the seats of an externally-controllable valve whose drive combinations make it possible to |
| 5668360 |
Circuit-breaker having two interrupting chambers per pole with drive mechanism and drive rods is |
September 16, 1997 |
| A circuit-breaker having two interrupting chambers per pole, the chambers being disposed in a T or V configuration at the end of a column provided at its base with a control system for operating a drive rod, each chamber containing a moving assembly connected via a linkage to the drive r |
