Abstract: A protection system configured to protect plural DC voltage sources configured to be connected in parallel between first and second input terminals of a voltage inverter. The voltage inverter can convert a DC input voltage into an AC output voltage. Each DC voltage source is connected by a first electrical conductor to the first input terminal and by a second electrical conductor to the second input terminal. The protection system includes: for each DC voltage source, a first cut-off member and first detector of a defect of isolation of the first conductor with respect to an electrical ground, the first detector and associated first cut-off member connected in series between the corresponding DC voltage source and the first input terminal of the inverter; and a mechanism triggering, in event of detection of the isolation defect, the associated first cut-off member to open the electrical link corresponding to the first conductor.

Abstract: A protection system configured to protect plural DC voltage sources configured to be connected in parallel between first and second input terminals of a voltage inverter. The voltage inverter can convert a DC input voltage into an AC output voltage. Each DC voltage source is connected by a first electrical conductor to the first input terminal and by a second electrical conductor to the second input terminal. The protection system includes: for each DC voltage source, a first cut-off member and first detector of a defect of isolation of the first conductor with respect to an electrical ground, the first detector and associated first cut-off member connected in series between the corresponding DC voltage source and the first input terminal of the inverter; and a mechanism triggering, in event of detection of the isolation defect, the associated first cut-off member to open the electrical link corresponding to the first conductor.

Abstract: A power converter includes a bus capacitor connected between a positive line and a negative line of a power supply bus and multiple switching legs connected between the positive line and the negative line of the power supply bus. Each switching leg includes two field-effect type transistors connected in series. The power converter also includes a first switch connected to the positive line of the power supply bus, upstream of the bus capacitor, a second switch connected to the positive line of the power supply bus, downstream of the bus capacitor, and a controller that controls the first switch and the second switch.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to a power converter comprising: a bus capacitor (Cb) connected between the positive line (10) and the negative line (11) of a power supply bus, a number of switching legs connected between the positive line (10) and the negative line (11) of the power supply bus, each switching leg comprising two series transistors of field-effect type, a first switch (I1) connected to the positive line (10) of the power supply bus, upstream of the bus capacitor (Cbus), a second switch (I2) connected to the positive line (10) of the power supply bus, downstream of the bus capacitor (Cbus), control means (3) for the first switch (I1) and for the second switch (I2).

Abstract: 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.

Abstract: 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.

Abstract: A connection device for an electric accumulator 10 a first connection subassembly 16 associated with one of the electrodes 12. It comprises a metallic conducting strip 20 provided with several pins that will be embedded in the electrode 12 to make the electrical contact, and temperature and/or electrical protection means housed in a fixed module 25 electrically connected to one of the ends of the strip 20.

Abstract: A connection device for an electric accumulator 10 a first connection subassembly 16 associated with one of the electrodes 12. It comprises a metallic conducting strip 20 provided with several pins that will be embedded in the electrode 12 to make the electrical contact, and temperature and/or electrical protection means housed in a fixed module 25 electrically connected to one of the ends of the strip 20.