Abstract: A profiled aluminum bar for electricity distribution includes a metal component 20 that is assembled with an aluminum profile 10 through respective aligned lobes of complementary shape, to form a joint of, for example, a winding shape, and providing the assembly with resistance to tensile forces. The component 20 can notably be a contact component made of copper with a tapping or jointing function, or an aluminum profile providing an extension to the bar at right angles to it.

Abstract: A switch assembly, particularly for a start-motor including a protection device and a contactor device, and an intermediate component for mechanical association and electrical interconnection between these two devices.

Abstract: The thermal protection relay determines a value representative of the thermal image of an apparatus to be protected according to a measured current value, to a previous value of the thermal image and to preset heating and cooling time constants. The relay takes into account a non-zero initial thermal image, determined from experimental thermal resistance curves of the apparatus. In the case of a motor, for example, this enables the cold tripping curve of the relay to be lowered without modifying the hot tripping curve, so as to bring the tripping curves of the relay closer to the thermal resistance curves of the motor.

Abstract: A spring connection terminal for an electrical device includes a conducting support part fixed to a main conducting part, and at least one clamping spring folded into the form of a loop and provided with a clamping window inside which a flange of the support part passes, and includes a spring stop that is folded so as to be housed inside the spring loop and which forms a guide for guiding the wire adjacent to the flange.

Abstract: This invention relates to a programmable logic controller (PLC) provided with communication functions in a client-server architecture and a private operating system that does not support the TCP/IP protocol but is adapted to automation programs and is equipped firstly with at least one intelligent module (MM, UC) in which an HTTP server is installed, and also a communication module (MC) that can be connected to remote equipment (C) through a bus, characterized by the fact that the intelligent module (MM, UC) is provided with an application programming interface (TCP API) that makes it possible to use connection and communication (TCP) functions of the TCP/IP type of communication module (MC), from a remote location.

Abstract: A switch comprises a long, slender stationary contact means and a movable contact means moving between an open position and a closed position. The contact zone of the contact means is separated from the electrical connection zone by a slot which opens out on the side where the movable contact means are situated in the open position. The depth of the slot is sufficient so that, when opening takes place, the current lines passing through the contact means are curved and run approximately parallel to the flank of the slot. This arrangement prevents the foot of the electrical arc from being directed towards the free end of the contact means, away from the arc extinguishing chamber.

Abstract: The control device comprises a holding coil, an electronic switch and a power supply circuit connected in series to the terminals of a supply voltage of the coil. A circuit for measuring the holding current is connected in parallel with the power supply circuit and comprises in series an additional electronic switch and a measuring resistor. The power supply circuit is thus supplied by the holding current flowing in the coil and the additional electronic switch is periodically closed to measure the holding current which is regulated by a microprocessor-based circuit controlling the two electronic switches.

Abstract: Electromagnetic switching device including a movable contact-holder fitted with a set of contact bridges bearing movable power contacts that operate in conjunction with fixed contacts, and an electromagnet composed of a coil, a fixed framework and movable framework. The movable contact-holder includes an assembling device including at least one elastic clipping foot for fastening the movable contact-holder of the electromagnet to the movable contact-holder, characterized in that the assembling device is equally suitable for direct and indirect assembly of the movable framework onto the movable contact-holder according to the type of movable framework used in DC or AC electromagnets.

Abstract: The invention relates to a regulation system for an asynchroNOus motor by field oriented control, reacting to a torque set value (T) and a flux set value (&phgr;). The flux set value is supplied from the torque set value by an operator carrying out first order low pass filtering (40) and calculating the square root (42) of the result of the filtering.

Abstract: The control circuit 12 generates an alternating voltage Ve through a flip-flop 13, preferably with inverter switches laid out in H form, in order to excite the oscillating circuit 11. The voltage Ve is made synchronous with the current i that passes through the transducer by means of a phasing device 14 that comprises 2 transistors T1, T2 coupled through their basis to an output 13b from the flip-flop and through their emitters to a terminal of the oscillating circuit. The link of the transducer with its control circuit is made using two wires only.

Abstract: An electrical switchgear apparatus comprises a plug-in circuit breaker movable in a fixed frame by means of a drive mechanism. A movable element, secured to the circuit breaker or to the drive mechanism, takes indexed positions characteristic of the plugged-out, test or plugged-in state of the apparatus. The apparatus is provided with at least two indicating switches. Indexing means enable each of the switches to be connected to the movable element in such a way that the first switch switches when the movable element reaches a first indexing position and that the second switch switches when the movable element reaches a second indexing position. The same indexing means, placed in a second state, also enable each of the switches to be connected to the movable element in such a way that the first switch switches when the movable element reaches the second indexing position and that the second switch switches when the movable element reaches the first indexing position.

Abstract: A switchgear apparatus having at least one movable contact biased in an open position by an opening spring, a loading mechanism of a closing spring and a kinematic opening and closing system linking the closing spring, the movable contact and the opening spring. The system is controlled by an opening latch and a closing latch. A closing order can be validly transmitted only to the closing latch when the apparatus is in a "ready to close" state, i.e. open, loaded and without a permanent opening order. The switchgear apparatus has an indicator with three positions: a "not loaded" position, a "ready to close" position, and a third "loaded and not ready to close" or "loaded disengaged" position. The indicator is kinematically linked to the loading mechanism, the opening latch, and the movable contact.

Abstract: The circuit breaker pole or poles comprise a movable contact means with a support carrier movable with respect to the frame between an open position and a closed position and one or more contact fingers movable with respect to the support carrier between a contact position and a retracted position. Electromagnetic compensation means are designed to apply electromagnetic forces on the contact finger or fingers tending to keep the contact finger or fingers in contact with the stationary contact means. Electromagnetic limiting means are designed to apply electromagnetic forces on the contact finger or fingers tending to drive the finger or fingers to their retracted position.

Abstract: A voltage sensor comprises a helicoidal winding formed by an optic fiber having at least one zone sensitive or sensitized to an electrical field having a 2nd order non-linear electro optic effect. The sensitization process of the optic fiber can be achieved by a polarization process under an electric field. The voltage sensor preferably comprises a device enabling the electrical field lines to be homogenized in the region where the helical winding is located. The phase difference induced by the optic wave by electro optic effect caused by the electrical field and representative of the voltage to be measured, can be measured by polarimetric or interferometric detection.