Schneider Electric Industries Sas

Schneider Electric Sa

Schneider Electric Industries Sa

Jean-Christophe Cuny

Gilles Baurand

Philippe Guibert

Christian Blanchard

Pierre Duchemin

Alain Gousset

Stephane Delbaere

Jean-Marie Trico

Gerald Gaschet

Vjekoslav Gladovic

Patrick Lemarchand

In a switching device, a method and device for determining the wear of the pole contacts (C, C, C) actuated by an electromagnet () whose movement is controlled by an excitation coil () by the variation of a contact wear distance travel time (Tu) generated during an electromagnet closing movement, by measuring at least one electrical signal (Ip) representing the conducting state of at least one power pole, by measuring an excitation current (Is) passing through the coil () of the electromagnet and by comparing the electrical signal (Ip) and the excitation current (Is) as a function of time. The measured wear distance travel time (Tu) can then be compared with an initial travel time (Ti) stored in the switching device.

Method for determining wear of a switchgear contacts

The invention concerns a control and protection module () for a low voltage multipolar switch device that is comprised of a connector base (), a control electromagnet () and a trip mechanism () capable of acting upon the moving contacts () in order to open and break the power poles. The detachable control and protection unit (), an electronic board () which has a processing unit (), a control device () and a protection device (), responsible respectively for operating the electromagnet and the trip mechanism in response respectively to a control signal () and a trip signal () transmitted by the processing unit (). The processing unit can suppress the control signal () from the electromagnet () in the event of malfunction of the protection device ().

Control and protection module of a switch device

A current sensor for an electrical device including a primary circuit in which a primary current flows. A magnetic circuit includes two identical U-shaped elements between which two studs for air gaps are located. A secondary circuit includes two similar coils of a cylindrical shape, mounted in series and encircling the air gaps, wherein these two coils are made in a continuous way with only one winding operation without any electrical connection between both coils. The winding of the primary circuit encircles one of the two coils. The sensor is designed so that it may be adapted to several nominal ranges of primary current by varying the number of passages of the primary circuit between coils, the number of windings of the secondary circuit, and the thickness of the air gaps.

Current sensor for an electrical device

A switching apparatus including an electromagnetic command device fitted with a magnetic circuit made up of a main circuit polarized by a permanent magnet and linked to a depolarizing coil and through a movable circuit integral with a movable support subject to a return spring and acting directly or indirectly on at least one disconnecting pole. The main magnetic circuit has at least two air gaps in series on the path of the magnetic flux generated by the permanent magnet and the movable magnetic circuit includes at least two parts capable of closing the air gaps when the main magnetic circuit and the movable magnetic circuit are joined together and are crossed by the magnetic flux created by the permanent magnetic, thereby carrying out a locking function and creating a multiplication of the locking forces, with an unlocking function being provided by the depolarization coil the counter-flux from which crosses the magnetic circuit and air gaps.

Switch with electromagnetic command

A control device for an electromechanical circuit breaker device. The device includes a bistable type electromagnet to deliberately control power contacts and a monostable trip electromagnet to open the contacts in case of a fault. The bistable electromagnetic coil and the trip electromagnetic coil are placed in parallel with a capacitance. The control device includes a maintained control switch and an H bridge of two-way switches associated with the bistable coil. The control device acts on the bridge of switches and a trip switch opens the contacts depending on the current in the coils measured by sensors.

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Malakoff, France

Jean-Christophe Cuny