A wiring device including an interrupting device and a controller. The interrupting device electrically connecting one or more line terminals to one or more load terminals when the interrupting device is in a reset condition and disconnecting the line terminals from the load terminals when the interrupting device is in a tripped condition. The controller has an electronic processor and a memory. The controller is configured to monitor a current of the one or more line terminals, identify a presence of an in-rush condition, wherein an in-rush of the current exists when the one or more cycles of current conform with a decay progression envelope, and prevent the tripped condition upon identifying the in-rush condition.

A system for reducing inrush current to an electronic component, the system including: a power supply, the power supply providing power at multiple non-zero voltages; and the electronic component; wherein, when the electronic component is connected to the power supply, the power supply provides a first non-zero voltage to the electronic component and, in response to a signal from the electronic component, provides a second voltage, the second voltage being higher than the first voltage, to the electronic component.

An arc suppression pre-charge circuit includes a source for providing energy to a load and a main contactor selectively closed to provide energy from the source to the load, wherein the main contactor provides an alternate current path from the source to the load and bypasses a pre-charge branch of the circuit when the main contactor is closed. The pre-charge branch includes a voltage-controlled resistor and a control circuit configured to control a resistance of the voltage-controlled resistor.

An inrush current detection method, an inrush current detection device and a computer-readable storage medium for a transformer are disclosed. The inrush current detection method includes sampling at least a part of a current signal of the transformer to obtain a numerical matrix; providing the numerical matrix as an input to an inrush current detection neural network; and calculating and outputting a label vector corresponding to the numerical matrix by the inrush current detection neural network, wherein the label vector indicates whether the current signal is an inrush current.

An apparatus and method for minimizing inrush power. The method includes transmitting a load energization signal from a primary microcontroller to a logic latch or secondary microcontroller, transmitting a zero-cross voltage signal from a zero-cross sensor coupled to the load power to the logic latch or secondary microcontroller, and transmitting an energize signal from the logic latch or secondary microcontroller to a relay after the receipt of an energize signal from the primary microcontroller and after receipt of a zero-cross signal.

The present disclosure relates to a power distribution unit (PDU) having at least one power receptacle for enabling attachment of an AC power cord of an external device thereto. A branch receptacle controller (BRC) has at least one bistable relay and is associated with the one power receptacle for supplying AC power thereto from an AC power source. The BRC monitors a voltage of an external power source and uses it to detect when AC power is lost, and then toggles the bistable relay, if the relay is in a closed position, to an open position.

Provided is an apparatus and method for controlling a circuit breaker for a static synchronous compensator (STATCOM) such that the circuit breaker installed in a branch line for the STATCOM is operated according to the current control characteristics of the STATCOM, the apparatus including: a transformer protector for detecting the differential current between primary current and secondary current of a transformer connected in series to the circuit breaker in the branch line, and controlling the opening/closing of the circuit breaker; and a STATCOM controller for controlling an operation of the STATCOM, wherein the STATCOM controller outputs, to the transformer protector, an opening suspension signal for suspending the opening of the circuit breaker when overvoltage occurring in the STATCOM is detected, and the transformer protector suspends output of a circuit breaker opening signal to the circuit breaker according to the received opening suspension signal.

A control circuit turns ON or OFF a switch that is provided at a midpoint of a wire. Thus, power supply via the wire is controlled. A current output circuit outputs a current that corresponds to a current flowing through the wire to a resistance circuit. In the resistance circuit, a series circuit of a resistor (R2) and a capacitor (C1) is connected in parallel to a resistor (R1). The control circuit) turns OFF the switch if the end-to-end voltage value of a voltage across both ends of the resistance circuit is larger than or equal to a reference voltage value.

A system for controlling inrush current between a power source and a load includes an output capacitor configured to be coupled in parallel with the load. The system also includes a transistor having a gate, a collector configured to be coupled to the power source, and an emitter configured to be coupled to the load. The system also includes a collector resistor coupled between the collector of the transistor and the gate of the transistor. The system also includes an emitter capacitor coupled between the gate of the transistor and the emitter of the transistor to facilitate current flow from the power source through the collector resistor and the emitter capacitor to charge the output capacitor.

The invention relates to a control circuit for protecting an electrostatic spray-coating apparatus, which has a high-voltage supply, against spark discharge. The control circuit has a disconnection device for automatically disconnecting the high-voltage supply, and has a device for detecting abnormal operation of the high-voltage supply. The device for detecting abnormal operation of the high-voltage supply is designed to monitor at least one parameter which is characteristic of the operation of the high-voltage supply, and to output a corresponding disconnection signal to the disconnection device when the at least one parameter which is characteristic of the operation of the high-voltage supply exceeds or falls below a predefined or predefinable limit value.