Schneider Electric Industries Sas

Bruno Reymond

Didier Leonard

Yvan Cadoux

Philippe Schuster

Marc Paupert

Sylvain Marie

Christophe Kilindjian

Cédric Bricquet

Stéphane Follic

Maria Vallet

Robert Diconne

Wedian Youssef

Gabriel Rilling

Jean-Pierre Duchemin

A method for monitoring an electrical installation comprises:

Method for monitoring an electrical installation comprises

The invention relates to a contactor-circuit breaker device (), comprising:

Contactor-circuit breaker device

This device protects at least one electronic switching branch of an electrical conversion system against an overcurrent, each branch comprising two switching half-branches serially connected at an intermediate terminal, at least one half-branch including a switching member, each switching member comprising a first controllable switch and a diode connected in antiparallel to the first switch. The protection device includes, for each switching branch, at least one second controllable switch, each second switch being connected to the intermediate terminal or to an electrode of said diode in antiparallel to the first switch, each second switch being able to switch, under action of a controller, from an on state to an off state to protect said diode from the overcurrent, means for measuring a magnitude relative to a current able to circulate in each diode, and means for controlling each second switch, based on the measured magnitude.

Device for protecting against an electrical overcurrent in at least one electronic switching branch, conversion system including such a protection device, and associated control method

The coupling device with electrical isolation comprises at least one input signal, an output of an output signal representative of said input signal, and signal transfer means with electrical isolation receiving the input signal and supplying said output signal. The transfer means comprise at least one signal transformer having at least one primary winding to receive a primary signal representative of said input signal, switching means to switch the input signal and supply the latter to said primary winding, and electrically isolated control means of the switching means comprising a control input receiving control signals during switching periods. The electrical switchgear unit comprises one such coupling device connected to measuring resistors and to a processing unit processing electrical protection functions.

Measurement signal coupling device with electrical isolation and electrical equipment unit comprising one such device

The current measurement device with electrical isolation comprises an input signal connected to an electrical shunt, an output of an output signal, and signal transfer means with electrical isolation receiving the input signal and supplying said output signal. The transfer means comprise at least one signal transformer having at least one primary winding to receive a primary signal representative of said input signal, switching means to switch the input signal and supply the latter to said primary winding, and electrically isolated control means of the switching means comprising a control input receiving control signals during switching periods. A trip unit and an electrical circuit breaker comprises one such current measurement device and a processing unit processing electrical protection functions.

Current measurement signal device with electrical isolation, electronic trip unit, and circuit breaker comprising one such device

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Moirans, France

Bruno Reymond