In response to a problem wherein a voltage of a capacitor of a power conversion device decreases when a voltage of an alternating current power supply is restored after once decreasing, the voltage of the capacitor drops below a maximum value of the voltage of the alternating current power supply when power is restored, and an inrush current occurs, the power conversion device, provided between an alternating current power supply and a load, is such that a decrease in an input voltage or an input current of a power converting unit is detected, a change in the voltage of the capacitor is predicted, and operations of the power converting unit are caused to stop before the voltage of the capacitor drops to or below the maximum value of the voltage of the alternating current power supply, thereby restricting an occurrence of an inrush current.

An integrated circuit includes an H-bridge circuit having a first output node for coupling to a high-side terminal of an inductor and a second output node for coupling to a low-side terminal of the inductor. A current source is coupled in series with a current sense FET between a digital upper supply voltage and the first output node, wherein during a fast decay mode, a gate of the current sense FET is coupled to be turned on. A current-sense comparator includes a first input coupled to a sensing node between the current source and the current sense FET, a second input coupled to the lower supply voltage and an output coupled to a driver control circuit.

A measurement device configured to deliver a voltage corresponding to an overlay of an input voltage applied to the terminals of the measurement device and of an image voltage of a current circulating in a first capacitor to the terminals of which the input voltage is applied, the measurement device includes a shunt filter intended to be mounted in parallel with the first capacitor and comprising a second capacitor and a first resistor mounted in series with the second capacitor, a second resistor mounted in parallel with the second capacitor.

An electrical safety monitoring device includes a first set of digital switches and a second set of digital switches for each of a plurality of line inputs, a first set of visual indicators, wherein each of the first set of visual indicators is electrically connected to one of the first set of digital switches and a second set of visual indicators, wherein each of the second set of visual indicators is electrically connected to one of the second set of digital switches. There is a first voltage-controlled oscillator operatively connected to the first set of digital switches for controlling a flash rate of the first set of visual indicators when the positive voltage is present and a second voltage-controlled oscillator operatively connected to the second set of digital switches for controlling a flash rate of the second plurality of visual indicators when a magnitude of the negative voltage is present.

According to one embodiment, a multichannel switch integrated circuit (IC) includes a multichannel switch circuit and a common test terminal. The multichannel switch circuit includes a plurality of switch circuitries. Each of the switch circuitries includes: an output transistor that outputs an output signal through an output terminal; an overcurrent detection circuit that detects a detection current according to a current flowing through the output transistor; and a diode having an anode that receives the detection current. The common test terminal is connected to each channel switch circuitry, connected to the overcurrent detection circuit through the diode, and connected to a cathode of the diode.

An on-board charging device includes an AC connector, an AC to DC converter and a detection circuit. The AC connector is configured to be connected to an electric vehicle supply equipment (EVSE), so that a protective earth terminal of EVSE is electrically connected to a protective earth terminal of the on-board charging device. The AC to DC converter is electrically connected to the AC connector, and the AC to DC converter is configured to convert an AC voltage provided by the EVSE into a DC voltage. The AC to DC converter has a reference ground terminal. The detection circuit outputs a detection voltage based on the voltage difference between the protective earth terminal of the on-board charging device and the reference ground terminal of the AC to DC converter. The detection voltage reflects whether the protective earth terminal of the EVSE is abnormal or not.

An electrical wiring device including: a plurality of line terminals comprising a line-side phase terminal and a line-side neutral terminal; a plurality of load terminals comprising a load-side phase terminal and a load-side neutral terminal; a line conductor electrically coupling the line-side phase terminal to the load-side phase terminal; a neutral conductor electrically coupling the line-side neutral terminal to the load-side neutral terminal; and a controller configured to trigger a trip mechanism to electrically decouple the at least one of the plurality of line terminals from at least one of the plurality of load terminals based, at least in part, on comparing a magnitude of the current differential to a threshold, wherein the threshold is a function of the frequency of the current differential.

A method for detecting a loss or an undervoltage condition of phase of an electric converter unit, wherein the method comprises: determining an extremum value, such as a maximum and/or a minimum value, of a phase voltage of the electric converter unit for at least one fundamental period of the phase voltage, and comparing the extremum value to a first threshold value, and if, based on the comparison, a first threshold criterion related to the first threshold value is satisfied, then determining the loss or the undervoltage condition of phase.

A micro grid system comprises a secondary energy source and a power controller. The secondary energy source is associated with a micro grid that includes a fixed or mobile facility, and the secondary energy source is configured to generate first DC power signal. The power controller is in communication with the secondary energy source and an electric grid, and configured to receive first AC power signal from the electric grid and the first DC power signal from the secondary energy source and output a second AC power signal to loads in communication with the power controller. The power controller comprises an AC to DC frequency converter configured to change frequency and/or voltage of the second AC power signal, a processor, and a memory configured to store instructions that, when executed, cause the processor to control the frequency converter to change the frequency and/or voltage of the second AC power signal.

A method for producing a pulse inverter comprising a module with electronic components, a contact bar sticking out from the side of the module for contacting the pulse inverter with a contact external to the pulse inverter, a current measuring device arranged on the contact bar for detecting a measurement signal regarding the current strength in the contact bar and a control board arranged on the top or bottom of the module with a driver circuit for control of the electronic components with the aid of the measurement signal, wherein the driver circuit makes contact with the module across control contacting pins of the module and with the current measuring device across measurement contacting pins of the current measuring device, wherein the current measuring device is attached to the contact bar such that it is movably mounted with respect to it, after which the control board is positioned such that the control contacting pins are led through control contact openings of the control board and the current measuring device is oriented by displacing it such that the measurement contacting pins are led through measurement contact openings of the control board, after which the current measuring device is secured to the contact bar and/or the control board.