The present disclosure provides a method and device for overvoltage protection. Specifically, the present disclosure provides an overvoltage protection device which provides a feedback loop for electronic components such as amplifiers and digital to analog converters which require feedback. The overvoltage protection device also includes overvoltage switches in both the signal and feedback channels, which may be opened by a fault detector in the event of an overvoltage. The device also includes an overvoltage feedback channel coupled between the signal and feedback channels, and which also includes a switch which may be closed in the event of an overvoltage event. As such, the overvoltage device provides a closed loop feedback channel during an overvoltage event.

A single-phase electric meter having a phase conductor intended to be connected to a phase of an electric line located upstream of the single-phase electric meter and to a phase of an electric installation located downstream of the single-phase electric meter, the single-phase electric meter further including a breaking unit mounted on the phase conductor, an upstream voltage sensor arranged to periodically measure an upstream voltage upstream of the breaking unit, and a processing device arranged to acquire upstream voltage measurements and to open the breaking unit when the upstream voltage drops below a first predetermined threshold voltage.

The present invention discloses an auto re-closing device and method for an electric vehicle charging cable control device.

The present invention is directed to an auto re-closing device and method for an electric vehicle charging cable control device, which are capable of stopping charging when a fault occurs and retrying to resume charging when charging is stopped.

The present disclosure provides a short-circuit protection apparatus and method. The short-circuit protection apparatus includes a current detection circuit, a control circuit, and a voltage detection circuit. The current detection circuit detects an output current of an output circuit and outputs a current detection signal when the detected current is greater than a preset current. The control circuit receives the current detection signal and controls the output circuit to be turned off The voltage detection circuit detects an output voltage of the output circuit. When the output voltage is not in the preset voltage range, the output voltage is detected continuously When the output voltage is in the preset voltage range, the control circuit receives the voltage detection signal for controlling the output circuit.

A controller for a secondary side of a switched mode power supply. A thermistor and an LED of an optocoupler are connected in parallel with each other between a voltage-supply-pin and a STOP pin of the controller. A reference-source provides a reference-signal between the STOP pin and the voltage-supply-pin. The STOP pin receives a temperature-measurement-signal from the thermistor, wherein the temperature-measurement-signal is representative of the resistance of the thermistor. The controller also includes an OTP-comparator that compares: (i) the temperature-measurement-signal; with (ii) a threshold-level, and provides an OTP-signal that is representative of whether or not the temperature-measurement-signal at the STOP pin crosses the threshold-level; and a switchable-current-source that selectively provides a bias-current to the STOP pin based on the OTP-signal, wherein the bias-current causes the LED to emit a light-signal that is representative of a fault to an associated photo-detector.

A solid-state circuit breaker and method of use. The circuit breaker includes current and voltage sensors, a power converter, and a digital signal processor. The digital signal processor operates the power converter between three operation states: a first operation state being an on state, a second operation state being an off state, and a third operation state being a current limiting state. The circuit breaker includes an overcurrent detection circuit to detect overcurrent conditions, and turn off the power converter if a load current exceeds a preset threshold. The method of operation includes operating the circuit breaker with a limited amount of overcurrent, and returning the circuit breaker to the normal operation state from the third operation state if the overcurrent condition is removed, or returning the circuit breaker to an off state from the third operation state if the overcurrent condition is sustained.

A ground overcurrent control system includes ground circuit with a first section and a second section. The first section is electrically connected to a ground member of an electrical connector and the second section is electrically connected to a ground reference. A switch element is positioned between the first section of the ground circuit and the second section of the ground circuit. A controller is configured to determine the current within the ground circuit while current is passing through the switch element and, upon the current exceeding a current threshold, the switch element is modified to an open condition. Upon determining that the voltage between the first section of the ground circuit and the ground reference is less than a voltage threshold, a command is generated to modify the switch element back to a closed condition.

Methods and systems for self-healing fault recovery in an electrical power distribution network, particularly distribution networks employing a mesh configuration. When a power source circuit breaker is tripped one or more virtual paths is traced throughout the mesh network, each virtual path originating at the power source that is offline, terminating at an alternate power source, and containing one or two open load switches. A restoration path is chosen from the virtual paths. Power can be transferred to other segments of the mesh network by isolating the fault and closing the open load switch in the chosen restoration path. Some or all of the method and system can be automated.

A method for reactivation of an electrical system of a vehicle comprising a first electrical system operating at a first lower voltage and a second electrical system operating at a second higher voltage, comprising: detecting a fault or a crash situation in the second electrical system; disconnecting a power source of the second electrical system; determining the fault of the second electrical system is no longer present or that the crash situation is resolved; reconnecting the power source to the second electrical system and increasing the voltage of the second electrical system from zero to an intermediate voltage lower than the second voltage; and if a detected current in the second electrical system is higher than a current threshold value; or if a detected voltage of the first electrical system is higher than a voltage threshold value; reducing the voltage of the second electrical system to zero.

A disconnect component coupled between a lighting load and a main power line. The disconnect component includes an input coupled to the main power line and a neutral line input to the disconnect component from the 277 volt circuit and an output coupled to the lighting load. The disconnect component includes a monitor that monitors a voltage on the main power line and a coupling component that couples the main power line to the output. The coupling component is configured to decouple the main power line from the output when the monitor senses a voltage on the main power line is higher than an upper limit voltage and re-couple the main power line to the output when the monitor senses that the voltage on the main power line is below the upper limit voltage.