Schneider Electric Industries Sas

Schneider Electric Sa

Philippe Guibert

Gilles Baurand

Alain Gousset

Jean-Christophe Cuny

Rémy Orban

Stéphane Delbaere

Jean Haudry

Gilles Henry

Christian Jarrige

A method for estimating a property of an electrical switching device that includes an electromagnetic actuator that includes a coil. The method includes: measuring electric current flowing through the coil; measuring supply electrical voltage of a control circuit for the actuator; injecting an electric current pulse into the coil; identifying a first time corresponding to a time for which the current flowing through the coil reaches a predetermined threshold value when the current increases following the injection of the pulse; and identifying a second time corresponding to a time for which the current flowing through the coil again reaches the predetermined threshold value when the current decreases after a spike. The method further includes estimating a resistance of the coil on the basis of a ratio of a sum of the values of the voltage that are measured between the second time and the first time, to a sum of the values of the current that are measured between the second time and the first time.

Methods for estimating a property of an electrical switching device, associated devices

Method and system for measuring electrical quantities. The method comprising:

Method and system for measuring electrical quantities

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

This invention relates to a multi-pole contactor&#x2014;circuit breaker type switch composed of a housing () containing breaking poles () activated by a control electromagnet () and by a trip control mechanism () and comprising a protection module () equipped with means () for measuring pole currents and means () for acting on the electromagnet () and on the trip control mechanism () if a fault current is detected, characterised by the fact that it comprises a control and/or communication module () that is installed removably on the housing, below the protection module () and communicating with the processing circuit () on the said protection module () through connectors ().

Multi-pole contactor-circuit breaker type switch

An electronic device for modeling the temperature of a motor by utilizing signals output from current sensors placed on motor power supply phases. Signals from the current sensors are sent to an interface that outputs a voltage which is an image of a summation a ratio of the motor currents sensed by each of the current sensors to a corresponding adjustment current for each of the phases. A calculation circuit utilizes the voltage as an input and outputs a charging current wave stream, the amplitude and the duration of the charging current being proportional to the summation the ratio. An RC type modeling circuit is provided to receive the charging current wave stream and to model the thermal state of the motor based on the charging current wave stream.

Electronic device for modeling the temperature of a motor

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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Chatou, France

Philippe Guibert