Abstract: An active EMC filter for medical applications allows reducing the leakage current normally induced by large phase-to-ground capacitances. The filter may comprise an active shunt module or an impedance converter or a correction signal generator and is suitable both for three-phase and single-phase applications.

Abstract: It is disclosed an intelligent power monitoring unit (2) for the monitoring of a power supply (1), which comprises a power input (24) for the input of electrical power, a power output (25) for the output of electrical power, a power line connecting the power input (24) to the power output (25), a first EMI/RFI filter (21) for the reduction of electromagnetic noise on the power line, monitoring means for monitoring parameters of the electrical power on the power line and/or for monitoring parameters of the first EMI/RFI filter (21), a data processing unit (29) for receiving and processing signals from the monitoring means and for issuing control signals basing on these signals, and a data communication bus for exchanging data between the data processing unit (29) and a device (51) external to the monitoring unit (2). The invention relates as well to a power supply (1) with such an intelligent power monitoring unit (2).

Abstract: An active EMC filter for machine tools allows reducing the leakage current normally induced by large phase-to-ground capacitances. The filter may comprise an active shunt module or an impedance converter or a correction signal generator and is suitable both for three-phase and single-phase applications.

Abstract: An active EMC filter for medical applications allows reducing the leakage current normally induced by large phase-to-ground capacitances. The filter may comprise an active shunt module or an impedance converter or a correction signal generator and is suitable both for three-phase and single-phase applications.

Abstract: An active EMC filter for machine tools allows reducing the leakage current normally induced by large phase-to-ground capacitances. The filter may comprise an active shunt module or an impedance converter or a correction signal generator and is suitable both for three-phase and single-phase applications.

Abstract: It is disclosed an intelligent power monitoring unit (2) for the monitoring of a power supply (1), which comprises a power input (24) for the input of electrical power, a power output (25) for the output of electrical power, a power line connecting the power input (24) to the power output (25), a first EMI/RFI filter (21) for the reduction of electromagnetic noise on the power line, monitoring means for monitoring parameters of the electrical power on the power line and/or for monitoring parameters of the first EMI/RFI filter (21), a data processing unit (29) for receiving and processing signals from the monitoring means and for issuing control signals basing on these signals, and a data communication bus for exchanging data between the data processing unit (29) and a device (51) external to the monitoring unit (2). The invention relates as well to a power supply (1) with such an intelligent power monitoring unit (2).

Abstract: EMC filter, for connection between a mains supply network and a mains-operated appliance to reduce conduction noise between said supply network and said appliance, comprising a voltage divider connected to said mains network, for generating a voltage lower than a voltage of said mains network; rectifying means, connected to an output of said voltage divider, for generating a DC voltage; and an electronic active circuit, supplied by said DC voltage, for absorbing a noise current transmitted between said supply network and said appliance.

Abstract: Filter network for the reduction of the voltage switching speed between an electrical motor drive and an electrical motor and/or between an electrical distribution network and a motor drive, comprising for each electrical phase a self-damped inductor having a complex impedance determined by a magnitude (Z) and a phase (?), the phase (?) of the complex impedance being comprised between 80 and 90 degrees in the frequency range of the motor's current, and being less than 60 degrees in the frequency range of the overvoltage oscillations. Using the inventive filter network, it is possible to manufacture low cost and small size du/dt-filters generating low voltage overshoot and low losses.

Abstract: Filter network for the reduction of the voltage switching speed between an electrical motor drive and an electrical motor and/or between an electrical distribution network and a motor drive, comprising for each electrical phase a self-damped inductor having a complex impedance determined by a magnitude (Z) and a phase (?), the phase (?) of the complex impedance being comprised between 80 and 90 degrees in the frequency range of the motor's current, and being less than 60 degrees in the frequency range of the overvoltage oscillations. Using the inventive filter network, it is possible to manufacture low cost and small size du/dt-filters generating low voltage overshoot and low losses.

Abstract: A series connection of an auxiliary switching position and a cut-on resistor is connected parallel to at least one primary switching position. A common drive rod is provided with which there is coupled a transmission system operatively associated with the primary switching position as well as a transmission system operatively associated with the auxiliary switching position. The transmission system associated with the auxiliary switching position comprises a cam cooperating with a follower or entrainment member mounted to an actuator rod leading to the auxiliary switching position. For positively controlling the sequence of movements without having to tension a spring during the cut-on of the auxiliary switching position the cam comprises a stationary cam or guide track containing a closed loop engaged by the follower member.

Abstract: A gas-blast switch containing both a stationary and a movable contact element. At one of these contact elements there is arranged a blast nozzle whose inlet chamber or compartment is connected with the outlet of a pump chamber containing an extinguishing gas and which can be placed under pressure during the cutoff stroke. Between the inlet chamber of the blast nozzle and the pump chamber there is a valve arrangement which is pre-biased in the closing direction. The valve arrangement responds when there is an excess pressure in the pump chamber and opens in the direction of the inlet chamber or compartment.