| Patent Number |
Title Of Patent |
Date Issued |
| 5435641 |
Cabinet for electrical equipment |
July 25, 1995 |
| A cabinet formed from a unitary open-faced cubicle structure having two lateral walls, an upper wall, a bottom wall, and a rear wall. A door closes the open face of the structure. The cabinet has at least one chimney along one lateral wall, the chimney extending from the front, open |
| 5221862 |
A.C. electrical power supply system including a backup power supply equipped with an inverter op |
June 22, 1993 |
| A first control loop enables the inverter to be made to operate as a current generator when it recharges the batteries of a back-up power supply. Two other control loops enable the inverter to compensate on the one hand the harmonics, and on for other hand for the reactive part of the |
| 5220479 |
Electronic trip device whose front panel is formed by a flat screen display |
June 15, 1993 |
| The front panel of the trip device is formed by a flat screen display, for example liquid crystal, controlled by the trip device microprocessor. The display provides a permanent display of the information relating to the type of trip device, the tripping parameters and measured values, f |
| 5208720 |
Electronic trip device with short delay function |
May 4, 1993 |
| The short time delay circuit comprises a counter which is zero reset when the signal representative of the current is greater than or equal to a threshold, and controls count-down of an up-down counter, when the content of the counter reaches a preset value. A clock circuit controls the |
| 5207601 |
Device for mechanical and electrical assembly of miniature molded cases |
May 4, 1993 |
| A runner (20) for mechanical assembly between two miniature molded cases (10,11) performs at the same time the electrical connection of the control circuits of the two cases (10,11). For this purpose, contact pads (27) are arranged in the bottom of the slide (19) in which the runner (20) |
| 5202818 |
Sealed switchgear cabinet |
April 13, 1993 |
| The framework of a switchgear cabinet is formed by identical frame sections in the shape of corner-pieces whose edges are folded at right angles to form folded ends. The edges of the corner-pieces are moreover joined together by a diagonal sealing partition which provides the sealing |
| 5195012 |
Electronic trip device comprising an improved long delay function |
March 16, 1993 |
| To perform the long delay function of an electronic trip device, a quantity (TLR1) representative of the thermal current state varies proportionally to the difference (I.sup.2 -Is.sup.2) between the square of a value (I) representative of the current flowing in a conductor to be protecte |
| 5164876 |
Static trip device comprising an earth protection desensitization system |
November 17, 1992 |
| The differential tripping threshold of the trip device is a polynomial function of an order greater than or equal to two of the highest phase current flowing in the power system protected by the circuit breaker comprising the trip device. |
| 5153802 |
Static switch |
October 6, 1992 |
| For a preset period following application of a closing order, the semi-conductor of the static power switch, supplied with DC voltage, is controlled by a regulating circuit so as to operate as a current generator limiting the current to a value much lower than its rated value. A fuse |
| 5150057 |
Continuous monitoring system of the electrical conduction of a mains system |
September 22, 1992 |
| The monitoring system of the conduction of a low voltage A.C. mains system comprises at least one measuring module creating a D.C. current component between two mains system conductors. The measuring module computes a value representative of the line resistance of the mains system which |
| 5148064 |
Medium voltage static switch |
September 15, 1992 |
| The medium voltage static switch is formed by serial connection of power semi-conductors, preferably of MOS type, controlled by a capacitive line. A diode is connected in parallel with the capacitor of the capacitive line between the gates of two adjacent semi-conductors. The control vol |
| 5147981 |
Low voltage electrical switchgear cabinet |
September 15, 1992 |
| An electrical switchgear cabinet comprises a frame, formed by uprights and switchgear support rails, which is fixed to props securedly united to a back plate. The sides of the back plate are folded forwards over a limited height smaller than the distance between the rails and the back pl |
| 5132865 |
Ultra high-speed circuit breaker with galvanic isolation |
July 21, 1992 |
| A circuit breaker comprises a static switch electrically connected in series with a disconnecting switch having an operating mechanism with a handle to close and open a system of main contacts. A voltage sensor ocmprises an electromagnet with a moving core capable of occupying an act |
| 5101160 |
Digital isolation monitor for an electrical power system |
March 31, 1992 |
| A digital isolation monitor comprises a digital processing signal processor P1 designed to synthesize a sine wave in real time by a table, and to send the digital values of this sine wave to a digital-to-analog converter of an input channel to generate a low-frequency AC reference signal |
| 5095183 |
Gas-blast electrical circuit breaker |
March 10, 1992 |
| A pole-unit of a gas-blast electrical circuit breaker comprises a tranverse partition made of injected insulating plastic material which at the same time performs guiding of the movable contact which passes through it. The injected material part bears an O-ring ensuring tightness with th |
| 5083081 |
Current sensor for an electronic trip device |
January 21, 1992 |
| A measuring sensor of an electronic trip device of a circuit breaker comprises a shunt in the form of a hollow cylinder inside which there is located an electronic processing unit, comprising an amplifier circuit and an input resistance in good thermal contact with the internal face of t |
| 5077627 |
Solid-state trip device for a protective circuit breaker of a three-phase mains system, enabling |
December 31, 1991 |
| The solid-state trip device of a protective circuit breaker of a three-phase mains system comprises a fault type detection circuit comparing the currents flowing in the mains system conductors with a first threshold and a second threshold, higher than the first one. It supplies a sig |
| 5075628 |
Insulation monitoring system of a direct current power supply system |
December 24, 1991 |
| Insulation monitoring of a direct current power supply system is achieved by application of an alternating current and the detector is constituted by a current transformer and a Hall-effect current sensor. This Hall-effect sensor controls a direct current generator, which supplies a |
| 5062525 |
Production machine incorporationg a high-speed lift and carry device with double walking beam, a |
November 5, 1991 |
| A production machine equipped with two walking beam lift and carry devices forming two parallel tracks, a main track and a branch track. Transfer of a part from the branch track to the main track is achieved by a handling unit synchronized with the walking beam. |
| 5057655 |
Electrical circuit breaker with self-extinguishing expansion and insulating gas |
October 15, 1991 |
| An inside of tubular contacts of a self-extinguishing expansion SF.sub.6 -gas circuit breaker including guiding ribs arranged to oppose any vortex-effect swirling gas flow between a first extinguishing chamber and a second expansion chamber. The presence of these ribs improves the di |
| 5003138 |
Rotating arc electrical switch |
March 26, 1991 |
| A medium-voltage electrical switch comprises contacts actuated by a connecting rod and crank system. Parallel to the main contacts there is arranged an arcing circuit comprising a cylindrical electrode disposed inside a coil and whose internal surface cooperates with a movable arcing |
| 5001313 |
Rotating arc circuit breaker with centrifugal extinguishing gas effect |
March 19, 1991 |
| A rotating arc circuit breaker comprising a pair of separable arcing contacts, a coil to set the arc in rotation, and an annular migration electrode. Guiding fins are arranged in the extinguishing chamber to slow down the rotation of the gas in a first peripheral zone, so as to generate |
| 4903185 |
Filtering device of the common mode disturbances affecting the printed circuit boards of a stati |
February 20, 1990 |
| The control and monitoring data transmission conductors between the control board and the transistor conversion circuit are formed into a flexible flat cable whose intermediate part is wound on a single magnetic circuit to constitute a common mode inductance designed to compensate the |
| 4883931 |
High pressure arc extinguishing chamber |
November 28, 1989 |
| 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 repulsion. The movable contact, in the |
| 4816624 |
Multiphase gas expansion circuit breaker for gas-insulated metalclad cell |
March 28, 1989 |
| A circuit breaker includes a plurality of poles disposed parallel side by side in a sealed enclosure (18) filled with SF6 insulating gas. The housing of each arc extinguishing chamber (22) comprises a metal shielding wall (52) designed to neutralize the influence of the magnetic stray |
| 4803319 |
Rotary switch with curved arc root migration track |
February 7, 1989 |
| A rotary switch with a sealed enclosure in which a rotating knife-blade is housed cooperating with two stationary contacts supported by the internal periphery of the enclosure. A permanent magnet is incorporated in the stationary contacts to magnetically blow the arc roots on a curved |
| 4794353 |
Dissipative low-pass filter |
December 27, 1988 |
| The filter comprises a series branch formed by an inductance coil (L) in parallel with a resistor (R1) and a parallel branch formed by a capacitor (C) in series with a resistor (Rc). For frequencies such that Rc>>1/.omega.C and R1<<.omega.L, the ratio between the output and i |
| 4792885 |
Control device of the transistor bases of an inverter arm |
December 20, 1988 |
| An inverter arm is made up of two transistors electrically connected in series, each transistor having its own independent control unit. The control units are supplied by a common power supply unit ensuring galvanic insulation by means of a transformer with two distinct secondary winding |
| 4780787 |
Self-monitoring digital solid-state trip release |
October 25, 1988 |
| The digital solid-state trip release is equipped with a watch-dog which monitors the periodic running of the information processing controlled by the microprocessor. When a disturbance or a delay occurs in the periodic cycle, the watch-dog first emits a reinitialization order applied to |
| 4780786 |
Solid-state trip unit of an electrical circuit breaker with contact wear indicator |
October 25, 1988 |
| A digital solid-state trip unit of an electrical circuit breaker is equipped with an electrical contact wear indicator enabling the degree of wear of these contacts to be known. Each time the circuit breaker performs a break, the microprocessor determines a contact wear value, in terms o |
| 4774628 |
Metalclad substation subdivided into tight compartments |
September 27, 1988 |
| A metalclad substation having a busbar isolating switch including an operating mechanism housed in the busbar compartment. The movable contacts of the isolating switch are housed in a compartment separated by a tight insulating partition from the busbar compartment. Tight partitioning of |
| 4772999 |
Static converter, especially for an uninterruptible electrical power supply system |
September 20, 1988 |
| A converter comprises a plurality of modules each having a heat-sink unit with a base-plate made of a good heat-conducting metal material, acting as a support for the electronic components, a pair of parallel flanges laterally fixed to the opposite edges of the base-plate, and a rear pla |
| 4768007 |
Current breaking device with solid-state switch and built-in protective circuit breaker |
August 30, 1988 |
| The device comprises a solid-state switch and a pair of mechanical contacts electrically connected in series. The solid-state switch is housed in a compartment towards the rear of the moulded case of the device, in thermal contact with an external metal plate. The solid-state switch hous |
| 4764650 |
Molded case circuit breaker with removable arc chutes and disengageable transmission system betw |
August 16, 1988 |
| A sub-assembly comprising a contact finger support cage and a connection pad of each pole is securedly united to an intermediate insulating partition of the case by a bracket and screw fixing device. The cage is pivotally mounted on a spindle positioned in bearings of the pad, and is |
| 4748304 |
Electrical circuit breaker with improved dielectric withstand |
May 31, 1988 |
| A puffer-type electrical circuit breaker is insulated by an SF6 insulating gas contained in a casing of moulded insulating material. The circuit breaker comprises a system of contacts, a pair of connection terminals electrically connected to the contacts by means of bushings passing |
| 4748303 |
Isolating switch of a high voltage metalclad installation |
May 31, 1988 |
| An isolating switch of a metalclad installation having an earthed metal enclosure is filled with a high dielectric strength gas. The isolation gap "d" separating the stationary contact from the movable sliding pin is surrounded by an annular electrode fitted between this isolation gap "d |
| 4743715 |
Draw-in and draw-out mechanism of an electrical circuit breaker with main and auxiliary circuits |
May 10, 1988 |
| The invention relates to a draw-in mechanism for an extractible molded insulated case circuit breaker, equipped with main and auxiliary circuits with fixed and movable connectors. The fixed connectors are arranged on the upper horizontal wall of the case, and the interacting movable |
| 4740770 |
Operating mechanism for a low voltage electrical circuit breaker |
April 26, 1988 |
| A mechanism for a circuit breaker includes a support lever insulated from a contact arm and a trip lever supported by a plate fitted with limited swivelling on a pivot. A mechanical link arranged between a toggle-joint and the contact arm includes a latching stop fixed on the plate. The |
| 4739254 |
Voltage measuring device of a high voltage metalclad installation |
April 19, 1988 |
| The low voltage capacitor of a capacitive divider of a metalclad substation is located in a sealed compartment separated from the substation enclosure. In normal operation, the compartment is in direct communication with the enclosure via a communication orifice. The compartment can be |
| 4739136 |
Control device of a high voltage circuit breaker equipped with closing resistors |
April 19, 1988 |
| A high voltage self-blowing circuit breaker with closing resistors is equipped with an auxiliary contact inserted in the trip control circuit of an electrical circuit breaker. The auxiliary contact is actuated by the mechanical control rod of the circuit breaker, in such a way as to prev |
| 4737607 |
Electrical circuit breaker with self-expansion and rotating arc |
April 12, 1988 |
| An electrical circuit breaker with self-expansion and rotating arc insulated with SF6 comprises a fixed arcing contact secured to the front face of a magnetic blow-out coil.An electrode is electrically insulated from the fixed arcing contact and covers the front face being connected to t |
| 4736079 |
Puffer type electrical circuit breaker having a high dielectric withstand |
April 5, 1988 |
| The invention relates to improving the dielectric withstand of a puffer circuit breaker having a main circuit arranged side by side with an arcing circuit inside a sealed insulating casing filled with an insulating gas SF6.The disconnection area arranged between the main contacts when th |
| 4714907 |
Miniature electrical circuit breaker with multiple moving contacts and thermomagnetic trip relea |
December 22, 1987 |
| The invention relates to a multiple moving contact assembly for a miniature circuit breaker with high ratings and a thermomagnetic trip release. The moving contact part of the circuit breaker includes two independent contact arms connected in parallel and mounted on a transverse spindle |
| 4713508 |
Circuit breaker operating mechanism equipped with a stored energy system having removable and re |
December 15, 1987 |
| A stored energy system of a circuit breaker operating mechanism comprises a telescopic link having a guide and a cap with relative movement between which at least one closing spring is inserted. At the end of charging travel, a removable blocking device can be inserted in orifices of the |
| 4710738 |
Moulded case circuit breaker |
December 1, 1987 |
| A moulded case circuit breaker has a toggle-joint mechanism, articulated on a hook and on a moving contact support. The toggle joint includes a swivel pin movably engaged in an aperture of the hook. When tripping takes place, the released hook pushes the toggle-joint, via the swivel pin |
| 4695913 |
Shunt effect low voltage circuit breaker |
September 22, 1987 |
| A circuit breaker, notably breaking the phase and neutral circuit, contains a shunt circuit, constituted by a switching electrode disposed in proximity to the phase contacts to pick up an arc drawn between these contacts, when opening occurs on a short-circuit. Transferring the arc o |
| 4687891 |
Fast manual closing mechanism of a miniature circuit breaker |
August 18, 1987 |
| The invention relates to a fast closing mechanism of a circuit breaker with an operating handle.The mechanism comprises an energy storage spring disposed between the handle and an intermediate lever supporting a transmission rod. A retaining plate operates in conjunction with a pin of th |
| 4672157 |
Low voltage circuit breaker with improved breaking |
June 9, 1987 |
| A moulded case low voltage circuit breaker for high currents has no arcing contacts and is equipped with arc blow-out means drawing the arc very quickly away from the contacts. An insulating shield associated with the moving contact forms an arc formation chamber of a small volume which |
| 4663690 |
Residual differential device equipped with a surveillance system for the electronic power supply |
May 5, 1987 |
| The electronics of a residual differential device is powered by several sources derived from the electrical system (14, 16, 18). A supply anomaly detector (36) signals the failure of one of the supply sources caused, for example, by a break in one of the wires (14, 16, 18). The anomaly d |
| 4660012 |
Polarized electromagnetic relay with magnetic latching for an electric circuit breaker trip rele |
April 21, 1987 |
| The invention relates to a polarized electromagnetic relay with magnetic latching and sliding armature.The magnetic circuit comprises a tubular frame enclosed by two flanges (22, 24), a permanent magnet (14) with axial magnetization fitted between one (22) of the flanges and a flux-diver |
