A circuit breaker device has a mechanical break contact unit connected in series with an electronic interruption unit. The mechanical break contact unit is switched by breaking contacts to prevent current from flowing or by closing the contacts to allow current to flow in the low-voltage circuit. The electronic interruption unit is switched by semiconductor-based switching elements into a high-impedance state of the switching elements to prevent current from flowing or into a low-impedance state of the switching elements to allow current to flow in the low-voltage circuit. An amplitude of the current in the low-voltage circuit is ascertained such that analog momentary current values are provided which are compared with a current threshold value by an analog comparator, and if the threshold value is exceeded, prevention of current flowing in the low-voltage circuit is initiated, in particular by switching the electronic interruption unit into the high-impedance state.

An overcurrent protection circuit includes an amplifier configured to amplify an inter-terminal voltage of a shunt resistor, an offset application circuit configured to allow the amplifier to provide an output with a predetermined offset voltage additionally applied thereto, a first comparator that compares an output voltage from the amplifier with a predetermined first reference voltage higher than the offset voltage to output a through-current sensing signal when the output voltage from the amplifier is higher than a first reference voltage, and an amplifier failure determination circuit that compares the output voltage from the amplifier with a predetermined second reference voltage that is higher than zero and lower than the offset voltage to output an amplification circuit failure determination signal corresponding to a result of the comparison.

According to an example, a device comprises a pass element and a controller. The controller is configured to receive a measurement of a current through the pass element. Based on the measurement of the current, the controller is configured to select a thermal shutdown threshold. The controller is further configured to turn off the pass element based on a determination that a temperature of the pass element is greater than the thermal shutdown threshold.

An electric wire protection device comprising a pyrotechnic cutoff switch disposed between an electric wire connecting a load and a vehicle-mounted power supply that is connected to a reference potential. The pyrotechnic cutoff switch is disposed between the electric wire and has: a conductive part through which current between the vehicle-mounted power supply and the load flows; a cutting blade cuts the conductive part; a drive part, actuated by gunpowder, propels the cutting blade in a direction in which the conductive part is to be cut; and first and second terminals that input and output current that drives the drive part. In addition, the electric wire protection device comprises: a conductive wire having one end thereof connected to the electric wire and the other end thereof connected to the first terminal; and a diode having an anode connected to the reference potential and a cathode connected to the second terminal.

The present disclosure relates to a power device protection apparatus. A power device protection apparatus according to an embodiment of the present invention comprises: a comparator which is connected to a power device, and determines whether an overcurrent of the power device occurs; and a control unit which controls the comparator so as to change, by software, a overcurrent reference value for determining whether the overcurrent occurs, wherein the control unit receives temperature information of the power device, changes the overcurrent reference value on the basis of the temperature information, and performs the overcurrent reference value change according to the temperature information, on the basis of the characteristics of the power device.

A power source control circuit is a hysteresis control circuit controlled by current mode. The power source control circuit includes a DC input power source, an input capacitor, a first switching element, a second switching element, an inductor, a current detector, a diode, a third switching element, a hysteresis current controller, and a load. The first end of the inductor is coupled to the second terminal of the first switching element and the first terminal of the second switching element. The second end of the inductor is coupled to the first terminal of the third switching element. The inductor outputs a pulse width modulated output current that is in the PWM mode and that flows into the load.

A relay temperature measuring device is provided. The device includes a sensor that measures an output of a battery and generates output measurement information and one or more relays that are disposed on a conductive line between the battery and a load. Additionally, a controller compares a relay temperature calculated using both-end measurement power information generated by measuring both ends of a conductor in a vehicle and the output measurement information with a preset temperature reference value, and connects or disconnects the relays based on a comparison result.

A driving circuit according to an embodiment includes a driving unit, a first temperature detecting unit, an overheat protecting unit, a second temperature detecting unit, and a failure diagnosing unit. The driving unit supplies a driving current to a load based on a control signal input from a controller. The overheat protecting unit blocks supply of the driving current to the load when the level of the signal output from the first temperature detecting unit exceeds a temperature threshold. The failure diagnosing unit blocks supply of the driving current to the load and outputs a signal of a level corresponding to a temperature out of a temperature range detectable by the second temperature detecting unit to the controller when it is determined that the first temperature detecting unit breaks down.

Damage preventing identification system for electrical conductors and coupling points including at least one identification unit arranged for arrangement to a surface, end cap or cable shoe of an electrical conductor, which identification unit is provided with an encapsulation for arrangement of the identification unit to the electrical conductor, and for housing means for visual and electronic tagging, which identification unit further includes means for measuring temperature and/or current.

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).