Gec Alsthom Sa

Alstom Technology Limited

Areva T&d Sa

Gec Alsthom T&d Sa

General Electric Technology Gmbh

Alstom

Tour Areva

Areva T & D Sas

Jean-Pierre Dupraz

Michel Collet

Wolfgang Grieshaber

Edmond Thuries

David Berard

Van Doan Pham

Xavier Allaire

Jean-Paul Moncorge

Jean-Paul Gris

Bernard Regnier

Olivier Grejon

Lionel Lucot

Colin Charnock Davidson

Joseph Martin

Jean-Luc Thomas

Ernst Suter

Serge Poullain

Alain Fevrier

Pascal Tixador

Vladimir Gutalj

Yang Yang

Yves Brunet

Philippe Manin

Karsten Pohlink

Heinz Aeschbach

Alain Fanget

Olfa Chetay

Simon Ardyna

Didier Taponat

Patrick Bastard

Houria Siguerdidjane

Sylvain Plante

Olivier Chuniaud

Georges Doummar

Farah Boudaoud

Eric Courbon

Pham Van Doan

Daniel Trenchat

The disclosure relates to a mechatronic circuit-breaker device adapted to break an electrical current flowing through electrical power transmission means, the device including a main branch comprising at least one electromechanical switch-disconnector connected in series with at least one breaker cell itself electrically in parallel with a snubber and a first voltage surge limiter; an auxiliary branch electrically in parallel with the main branch and comprising at least one power electronic switch, connected in series with at least one capacitor, itself electrically in parallel with its discharge resistance and a second voltage surge limiter. The first voltage surge limiter has a sharper voltage-current characteristic and offering a much steeper slope at low currents than the second surge limiter.

Mechatronic circuit-breaker device

A circuit-breaker device, comprising a main branch and an auxiliary branch electrically in parallel with the main branch, wherein the main branch comprises at least one mechanical switch-disconnector in series with a breaker cell constituted of at least one semiconductor switch, and a snubber circuit in parallel with the at least one breaker cell, the snubber circuit including an energy storage element, wherein the mechanical switch-disconnector is switchable to selectively allow current to flow in the main branch in a first mode of operation or commutate current from the main branch to the auxiliary branch in a second mode of operation, characterized in that the snubber circuit further comprises a bleeder resistor arranged to create a counter current in the main branch when current is commutated from the main branch to the auxiliary branch by discharging the energy storage element.

DC circuit breaker with counter current generation

A device for regulating the supply to a photovoltaic converter, the device comprising: a laser source (); a photovoltaic converter () that feeds a DC-DC converter (); circuit () for regulating the input impedance of said DC-DC converter () as a function of the operating voltage (U) of the photovoltaic converter () and of its no-load voltage (U); and circuit () for measuring an output voltage of the DC-DC converter () and for producing a regulation signal (SR) for regulating the laser source.

Method and device for regulating the supply of a photovoltaic converter

An extinguishing branch () for an electrical circuit () includes: a snubber circuit () including an energy storage limb (), wherein the energy storage limb () includes first and second energy storage limb portions separated by a first junction () to define a first voltage divider, and each energy storage limb portion includes at least one energy storage device (); and an arrester limb () connected across the energy storage limb (), wherein the arrester limb () includes first and second arrester limb portions separated by a second junction () to define a second voltage divider, and each arrester limb portion includes at least one arrester element (), wherein the first and second junctions () are connected to define a voltage divider bridge, and the voltage divider bridge is electrically coupleable to the electrical circuit () so as to provide, in use, a driving voltage to drive the electrical circuit ().

Circuit interruption device

For application to medium- and high-voltage circuit breakers, the control device makes it possible to actuate opening of the circuit breakers used in the medium- and high-voltage networks very quickly. The spring used in the control device is a spring of the composite type, having a curved C- or &#x3a9;-shape. The spring has a stationary first end and a movable second end that is pivotally connected to the end of a lever device, that is itself constrained to rotate with the drive shaft of the control device.

Spring control device for a circuit breaker

The invention relates to a new mechatronic circuit-breaker and its associated triggering method for breaking either alternating currents or direct currents at high voltages.

Mechatronic circuit breaker device and associated tripping method and use thereof in interrupting a high direct current

A locked state for a movable part () of switchgear is created by deflected spring wires () entering a recess (). Said device is reversible and has the advantage of being safe since it is completely passive, and it improves the dynamics of the movement of the movable part in particular by damping impacts when entering the abutment state. The invention can be applied to the drive rod of a vacuum circuit-breaker.

Electrical equipment comprising a mobile part having improved dynamics

A movable portion of a vacuum circuit-breaker includes a circular spring sliding on an outer bearing surface in most positions, that is suitable for entering a recess on relaxing in order to define a maximally open position for the vacuum circuit-breaker in which locking is thus provided. The movable portion may be made up of two sections, of which one, made of copper, is a very good electrical conductor, and is directed towards the stationary contact and receives a connection element for connection to an outside electrical circuit; the section may be made of steel in order to promote sliding of the spring without wear.

Switchgear for a vacuum circuit breaker comprising locking means

The invention relates to a method of opening a shunt switch carrying a current, the switch being connected in parallel with at least one thyristor of a high voltage DC network, interruption of the current flowing through the switch being initiated at the time of a current zero of the current flowing through the switch, the method being characterized in that it includes, based on a measurement effected by means for measuring the current flowing through the switch, a step of adjusting a control angle of the thyristor to position the current zero in a zone in which the time derivative of the measured current is a continuous function and the absolute value of a peak value of the measured current is substantially equal to the absolute value of the inaccuracy of the measurement of the current zero.

Method of opening a bypass switch of a high voltage direct current network

The invention relates to a novel permanent magnet electromagnetic actuator with triggering speed and drive torque improved relative to those of the prior art. The main target application is actuating an electromechanical switch-disconnector specifically for performing the operations to disconnect a mechatronic circuit-breaker for breaking high-voltage direct currents.

Electromagnetic actuator comprising permanent magnets and mechanical load interrupter actuated by such an actuator

A control apparatus for controlling electrical switchgear, the control apparatus being designed such that it is capable of performing the following in succession:

Apparatus for controlling electrical switchgear

A control device for controlling electrical switchgear such as a circuit breaker or the like includes an actuating arm having a connection point suitable for being moved along a closed line including points P, Pand P. The connection point thus moves during an opening stage for opening the moving contact, under the effect of a mechanical spring from point Pto point P. It also moves during a re-cocking stage for re-cocking the mechanical spring under the effect of a motor being switched on, and while keeping the moving contact in the open position, from point Pto point P. It also moves during a closure stage for closing the moving contact, also under the effect of the motor being switched on, from point Pto P. In this manner it is possible to successively perform three distinct stages of putting the actuating arm in motion, between the instant at which the moving contact leaves its closed position and the instant at which it returns thereto after having occupied its open position. A re-cocking stage for re-cocking the mechanical spring that is distinct from the closing stage and from the opening stage for closing and opening the moving contact, is performed, with the opening stage to be performed merely by releasing the energy that has been previously accumulated by the spring.

Control device for controlling electrical switchgear

The current transformer comprises at least two partial circuits (CB) each comprising a Rogowski type winding (C), each of said the partial circuits being made in the form of an angular portion of a complete circuit (CB) which surrounds at least one primary conductor (A,B,C) of the transformer over 360&#xb0;. The winding (C) of each partial circuit (CB) is constituted by a go winding (C) and by a return winding (C) which extend over the angular extent (&#x3b8;) of the partial circuit (CB). For each partial circuit (CB), the go and return windings are electrically connected in series, both having turns wound in the same direction so as to form a single winding (C) which presents a pair of adjacent electrical terminations (T, T) connected to an acquisition system (').

Current transformer with rogowski type windings, comprising an association of partial circuits forming a complete circuit

A device for controlling a circuit-breaker intended for opening and closing this electric power cut-off device comprising a mobile contact, this control device comprising a motor with a rotary output shaft and being connected to power supply means and actuating means transforming the output displacement of the motor into a displacement of the contact, this device also comprising a mechanical spring arrangement involved in opening and closing the contact. The actuation means include a set of jointed elements providing the connection of the rotary shaft and of the ring, and, in the closed position of the contact, the set of jointed elements is near a dead centre position, a so-called open dead centre, the opening spring being only able to drive it towards the open position upon moving past this dead centre during opening.

Device for controlling an electric power cutoff device

A highly temperature-stable capacitor for taking measurements on a high-voltage line, said capacitor having a high-voltage electrode (HT), an annular printed circuit (CI) surrounding said high-voltage electrode (HT) coaxially and having at least one electrically conductive track that forms a low-voltage electrode (BT), said capacitor being characterized in that the printed circuit (CI) also has at least one temperature-sensitive resistor (TH).

Highly temperature-stable capacitor for taking measurements on a high-voltage line

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Bressolles, France

Jean-Pierre Dupraz