An embodiment electronic circuit includes an electronic switch comprising a load path, and a control circuit configured to drive the electronic switch. The control circuit is configured to operate in one of a first operation mode and a second operation mode based at least on a level of a load current of the electronic switch. In the first operation mode the control circuit is configured to generate a first protection signal based on a current-time-characteristic of the load current and drive the electronic switch based on the first protection signal. The control circuit is configured to generate a status signal such that the status signal has a wakeup pulse when the operation mode changes from the second operation mode to the first operation mode and, after the wakeup pulse, a signal level representing a level of the load current.

A power switch module comprising a control component. Upon an indicated operating condition fulfilling a protection condition, the control component is arranged to transition the power switch module from an ON state to a latched-OFF state in which the control component is arranged to configure the switching device to be turned off to decouple the load node from the power supply node. Having transition to the latched-Off state, the control component is further arranged to determine whether a voltage level at the load node exceeds a threshold voltage level, and if it is determined that the voltage level at the load node exceeds the threshold voltage level, transition the power switch module from the latched-OFF state to a current-limited state in which the control component is arranged to control the switching device to limit current-flow there through.

An apparatus includes a current sense resistor configured to receive a supply current for one or more devices. The apparatus also includes a current sense amplifier configured to amplify a voltage across the current sense resistor. The apparatus further includes a comparator configured to compare the amplified voltage from the current sense amplifier to a reference voltage. In addition, the apparatus includes an octal driver configured to receive the supply current from the current sense resistor and to control one or more device outputs associated with the one or more devices. The apparatus may also include an optocoupler configured to receive an output from the comparator and, based on the output, control an output enable pin of the octal driver. There could be multiple resistors, amplifiers, comparators, drivers, and optocouplers arranged in multiple circuit branches, which could be configured to control multiple device outputs associated with different groups of devices.

A communication distribution unit, containing at least one power switch, said communication distribution unit comprising for an at least one consumer a power switch (4) based on a semiconductor design to switch on and off output lines (3) for the at least one consumer and the power switch (4) comprises at least one switching module (5).

A circuit breaker with a switching path has at least one line interruption apparatus, wherein the circuit breaker has a disconnection unit and a connection unit which are each connected to the line interruption apparatus. The switching device has at least one measuring arrangement for measuring at least one electrical variable on the at least one switching path. The disconnection unit further has a comparison and decision unit, which comparison and decision unit is connected to the measuring arrangement and to the line interruption apparatus. The circuit breaker has a first data interface, which first data interface is designed to receive at least one connection command and/or one disconnection command, and wherein the first data interface is connected to the disconnection unit and the connection unit.

A method for monitoring an electrotechnical device, the electrotechnical device including three phases respectively connected to three phases of an electrical network and the method making it possible to determine an alert on the basis of a comparison between specific parameters associated with each of the phases and obtained from temperature and current measurements on each of the phases.

An electric motor system having substantially independent hardware-based and software-based pathways for detecting and initiating responses to fault conditions, such as over-current conditions, in an electric motor which is powered by a power inverter which is controlled by a power module and a microprocessor. Each pathway involves comparing a voltage, which is representative of an electric current flowing to the motor, to a predetermined maximum voltage, and if the former exceeds the latter using hardware or software to initiate shutting off the motor, such as by shutting off the power inverter. When one pathway detects a fault condition it may notify the other pathway, and the notified pathway may also initiate shutting off the motor.

A fault detection apparatus includes a temperature detection unit, a current detection unit, a controller, and a breaking unit. The temperature detection unit is configured to detect temperatures of the plurality of filter capacitors and output the temperatures to the controller. The current detection unit is coupled to the plurality of filter capacitors and is configured to detect currents of the plurality of filter capacitors and output the currents to the controller. The controller is separately connected to the temperature detection unit, the current detection unit, and the breaking unit, and is configured to: when the received temperature exceeds a first threshold and the received current exceeds a second threshold, control the breaking unit to be disconnected. The breaking unit is connected between the output end of the grid-tied inverter and the plurality of filter capacitors and is configured to be disconnected or connected under control of the controller.

A monitoring method for an electrical energy transfer device which has a first phase conductor and a second phase conductor, includes the following steps: a temperature of the first phase conductor is compared with the temperature of the second phase conductor and a signaling is performed if there is a deviation between the temperatures. The electrical energy transfer device is, for this purpose, equipped at the first phase conductor with a first temperature sensor and at the second phase conductor with a second temperature sensor.

In a power distribution device, a current detection circuit detects a current value of a current flowing through a wire. When a switch is on, a microcomputer determines whether or not a predetermined condition is satisfied, based on the current value detected by the current detection circuit. If it is determined by the microcomputer that the predetermined condition is satisfied, a drive circuit turns off the switch.