Schneider Electric Industries Sas

Pascal Houbre

Michel Clemence

Erick Contini

Patrick Larcher

Alain Moreux

Olivier Coutelou

Francois Vincent

Sebastien Buffat

Frédéric Toti-Buttin

Fabien Odille

Sébastien Buffat

François Vincent

Patrick Perron

Alexandre Soleillant

Gilles Budillon

Xiaodong Shi

Frédéric Waterlot

Alain Moreaux

A device for measuring electric currents includes Rogowski-type current sensors, each configured to measure an AC electric current in an electrical conductor, each sensor including coils that are electrically connected in series to form a measurement circuit and being joined to one another to delimit a central zone of this sensor to receive the corresponding electrical conductor. One of the coils is common to the first and second sensors, this common coil being electrically connected to the first and second measurement circuits.

Device for measuring electric currents

A device for measuring electric currents includes multiple current sensors of Rogowski type, each suitable for measuring an electric current flowing through an electrical conductor, these current sensors being in adjacent pairs and each including coils for measuring the current and a central aperture for receiving the corresponding electrical conductor. Each current sensor includes two of the coils, which coils are positioned in parallel and facing one another on opposite edges of the central aperture and two ferromagnetic bars extending between ends of the coils, perpendicularly to a longitudinal axis of the coils.

Device for measuring electric currents in electrical conductors

The invention relates to a device for measuring an electrical quantity of one phase of an AC electric current in an overhead electrical network, comprising: a sensor designed to be attached to an electric line of the network, the sensor including: an electrically conductive plate; an electrical conductor, designed to electrically connect the plate to the line, in order to circulate a first current from the line through the conductor; a processing unit, designed to determine the electrical quantity from value values of the first electric current and a value of a capacitance between the plate and ground. The device also comprises a generator, electrically connected to the conductor and designed to inject a second current through the conductor, the second current having a frequency other than the frequency of the first current, the processing unit also being designed to calculate the capacitance between the plate and ground as a function of the second current.

Device for measuring an electrical quantity of one phase of an AC electric current of an overhead electrical network

A module for the interconnection between an electrical circuit breaker and an electrical contactor includes a housing and multiple high-power electrical conductors that are housed inside the housing, each of the high-power electrical conductors being suitable for electrically connecting an electrical output of a circuit breaker to an electrical input of a contactor, in order to allow a supply electric current to flow from the circuit breaker to the contactor. This interconnection module additionally includes a voltage sensor, which sensor is suitable for detecting the presence of a voltage between at least two of the high-power electrical conductors.

Module for the interconnection of a circuit breaker and a contactor for an electrical assembly comprising a voltage sensor

A detector for detecting at least one electric quantity in an electric conductor, and an overhead network for distributing electricity. The detector includes a frame on which a mechanism is fixed, the mechanism including a magnetic toroid, divided into two branches rotatable around an axis defined by the frame, between a separated position and a position closed around the electric conductor, a current sensor, divided into two branches rotatable around an axis defined by the frame, between a separated position and a position closed around the electric conductor, the current sensor performing an AC current measurement, a force transmitting element transmitting a rotational force to the magnetic toroid and the current sensor, the element being provided with at least one portion to receive the conductor by bearing, and a first clamp including two clamp arms, and a second clamp including two clamp arms.

Detector for overhead network and overhead network comprising such a detector

A current sensor including a measurement torus, arranged in a casing positioned around an electric conductor able to transmit an electric current, and a device for detecting a voltage in the electric conductor. The detection device is configured for surrounding the electric conductor when the current sensor is installed.

Current sensor and electric network comprising such a current sensor

A system to measure electrical energy of current in a secondary electrical conductor connected to a primary electrical conductor, the primary and secondary conductors having substantially same voltage. The system includes a primary module including an emitter and a unit for measuring voltage of the primary conductor, at least one secondary module including a receiver, an intensity sensor of current in the secondary conductor, and a unit for calculating energy of the current. The primary module compresses the measured voltage value and emits, to each secondary module, a first message containing the compressed measured voltage value. A time synchronization mechanism performs time synchronization of each intensity sensor with the voltage measuring unit. The calculating unit is connected to the receiver and can calculate energy from the measured voltage and intensity values.

System for measuring electric power, transformer substation comprising one such system and method for measuring electric power with such a system

The removable device () according to the invention is designed to be connected to an electronic trip unit (). The trip unit () comprises an internal electrical power supply bus () and the device () is adapted to be supplied with electrical energy via the internal electrical power supply bus (). The device () comprises a withdrawal member () for withdrawing electrical energy on the internal electrical power supply bus (). The trip unit () includes a switched-mode power supply () capable of delivering a power supply signal (S). The withdrawal member () comprises detection means for detecting each rising edge of the power supply signal (S), and the electrical energy of the power supply signal (S) is withdrawn as of the detection of a rising edge.

Removable device for an electronic trip unit, power supply method of such a device and assembly comprising an electronic trip unit and one such removable device

A device for measuring an electric current flowing in a cable, including a flexible Rogowski coil, secured to actuating means for moving the coil to an open position for engagement around a cable, and a closed position to surround the cable, a magnetic circuit, with a winding around the magnetic circuit, for closing around the cable when the coil is in the closed position. The coil in the closed position, may have a non-wound area of predefined length with an overwinding at each opening end of the coil.

Device for measuring an electric current in a cable

A detection device that detects resetting of an electric circuit breaker. The electric circuit breaker comprises fixed and moving contacts, the moving contact being movable between an open position and a closed position, a mechanism for separating the contacts, a lever for resetting the mechanism from the open position to the closed position of the moving contact, and an actuator for actuating the separator mechanism, the actuator including an electromagnetic coil and a core movable between an idle position and a working position in which the separating mechanism is actuated, the coil causing the moving core to move from idle position to working position. The detection device may comprise means to generate a resetting indication signal from an electric pulse corresponding to an electric current induced in the coil by the movement of the moving core from its working position to its idle position during resetting of the circuit breaker.

Device for detecting resetting of a circuit breaker, actuator of a separating mechanism of the circuit breaker contacts, electric circuit breaker and use of an induced current to generate a resetting  indication signal

The electronic trip device comprises at least one current sensor, a rectifying circuit to supply a supply current, an electronic processing unit to control an actuator designed to actuate an opening mechanism of the main conductor, and an electric power supply circuit equipped with a voltage regulator designed to supply a supply voltage to the electronic processing unit. In the electronic trip device, the power supply circuit comprises voltage raising means enabling a raised voltage to be supplied to the input of the voltage regulator designed to supply the supply voltage to the electronic processing unit, said raised voltage being greater than a voltage at the terminals of the storage capacitor. The invention also relates to a circuit breaker equipped with the electronic trip device described above.

Electronic trip device provided with a power supply circuit comprising voltage raising means and circuit breaker comprising one such trip device

The invention relates to an electronic trip device and a circuit breaker equipped with said electronic trip device, said trip device comprising at least one current sensor, an actuator, and an electronic processing unit to control said actuator, wherein the electronic processing unit comprises means for monitoring the state of connections of the at least one current sensor and/or of the actuator, and display means for displaying the operating state of the trip device, the means for monitoring acting on the display means to display the state of connections of the at least one current sensor and/or of the actuator. The invention also relates to a method for monitoring the state of connections of an electronic trip device comprising monitoring of the state of the connections and control of display of the state of the connections.

Electric trip device provided with monitoring means, circuit breaker comprising one such trip device and method of monitoring

The Rogowski type current measuring device comprises at least three coils electrically connected in series and forming a closed polygonal outline designed to surround a conductor to perform current measurement. The local inductance of at least one of the ends of said coils is greater than the local inductance towards the central part of said coils.

Electric current measuring device, current sensor, electric trip unit and breaking device comprising such a measuring device

The trip device comprises a system-powered power supply circuit comprising a capacitor for power supply of a trip coil. When the trip device is powered on, the capacitor charges and its voltage is regulated according to a first reference voltage sufficient to activate the trip coil if necessary. After a preset period, regulation of the voltage at the terminals of the capacitor is performed according to a second reference voltage, lower than the first voltage. The reference voltage reverts to the first value during the same preset period when the measured current reaches a preset threshold, which constitutes an indication of the presence of a fault that will lead to tripping being required. The capacitor is therefore generally charged at a lower voltage than that which is necessary for tripping, thus enabling its size to be reduced.

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Jarrie, France

Pascal Houbre