A snubber circuit for a solid state circuit breaker (SSCB), the snubber circuit comprising a series connected capacitor and transient voltage suppressor, TVS, connected across switches of the SSCB, and a bidirectional solid state circuit breaker comprising: a main SSCB circuit configured to be connected between a power supply and a load, and comprising first and second semiconductor switches connected in series, and a snubber circuit as described above having a first end connected to a first end of the first semiconductor switch and a second end connected to a second end of the second semiconductor switch.

Some embodiments are directed to an apparatus for detecting and suppressing DC electric arcs at a component, and are particularly adapted for vehicle wiring harnesses. The apparatus can include a detector circuit electrically connected to input and output terminals so as to be electrically connected in parallel to the component, the detector circuit being configured to detect a significant voltage spike across the component upon the component actuating between open and closed positions. The detector circuit can also be configured to transmit a control signal upon detecting the significant voltage spike. The detector circuit can include multiple circuit elements, enabling both the detection of the significant voltage spike and the transmission of the control signal, that are directly electrically connected to each other. A switching circuit conducts electricity from the power source side of the component to the load side of the component upon receipt of the control signal.

A switch control apparatus capable of effectively controlling a switch during a process of controlling the switch provided in a battery pack. When the switch is shifted from a closed state to an open state, the current caused by the generated counter electromotive force is quickly released, thereby quickly shifting the switch to turn on or off. In addition, since the voltage applied to the control unit falls within the rated voltage range, the stability of the switch control circuit may be enhanced.

The present disclosure relates to a micro-loss combined mechanical DC circuit breaker and its control method, consisting n ports, n load current paths and a main breaker; wherein the n load current paths are parallel with the main breaker, and each load current path is divided into an upper bridge arm and a lower bridge arm at a connection point; each port is electrically connected to the connection point of a load current path; the upper bridge arm of each load current path is made of an ultra-fast mechanical switch; the lower bridge arm of each load current path is made of a residual current breaker and a fast closing switch; the main breaker consists of a high-voltage capacitor in series with a low-voltage capacitor that is pre-charged.

A disconnecting device for interrupting current, in particular of a circuit breaker, having a switch and a voltage limiter connected in parallel to the switch. The voltage limiter has a number of parallel-connected phases, each phase including a resistor. At least one of the phases includes a switching element, which is connected in series to the resistor of the phase.

A direct-current circuit breaker includes a first main circuit breaker inserted into a first direct-current line, a resonance circuit connected in parallel to the first main circuit breaker, a MOSA connected in parallel to the first main circuit breaker via the resonance circuit, a second main circuit breaker inserted into a second direct-current line, a switch connected in series to the second main circuit breaker, a resonance circuit connected in parallel to the second main circuit breaker, and a MOSA connected in parallel to the second main circuit breaker via the resonance circuit. The second direct-current line is a line that branches off from the first direct-current line and returns to the first direct-current line. The switch is inserted upstream of the second direct-current line.

A point-on-wave relay device includes a first contact relay and a second contact relay in series with the first contact relay. A first state of the first contact relay in conjunction with a first state of the second contact relay causes a point-on-wave open operation and second state of the first contact relay in conjunction with a second state of the second contact relay causes a point-on-wave close operation.

Disclosed is a switch control apparatus capable of effectively controlling a switch during a process of controlling the switch provided in a battery pack. When the switch is shifted from a closed state to an open state, the current caused by the generated counter electromotive force is quickly released, thereby quickly shifting the switch to turn on or off. In addition, since the voltage applied to the control unit falls within the rated voltage range, the stability of the switch control circuit may be enhanced.

A separating device for interrupting a direct current of a current path, in particular for an on-board electrical system of a motor vehicle. The separating device has a hybrid switch with a current-conducting mechanical contact system and a first semiconductor switch connected to the hybrid switch in parallel and having a switchable resistance cascade with at least one ohmic resistor which is connected to the contact system of the hybrid switch in parallel.

A switching device for low or medium voltage electric power distribution network, the switching device including one or more electric poles, each electric pole including: an insulating housing extending along a longitudinal axis and fixed to a main support structure of the switching device; a first pole terminal and a second pole terminal electrically connectable with a corresponding phase conductor of an electric power source and with a corresponding load conductor of an electric load, respectively; a movable contact and a fixed contact, which are electrically coupleable or decoupleable one with or from another upon a movement of the movable contact towards or away from the fixed contact, the fixed contact being electrically connected with the first pole terminal, the movable contact being electrically connectable with the second pole terminal; a movable circuit assembly including a plurality of semiconductor devices adapted to switch in a conduction state or in an interdiction state depending on the voltage applied thereto, the semiconductor devices being electrically connected in series one to another in such a way that a current can flow according to a predefined conduction direction when the semiconductor devices are in a conduction state, the movable circuit assembly including first and second assembly terminals for the plurality of semiconductor devices. The movable circuit assembly is operatively coupled with the movable contact and moves together with the movable contact during a movement of the movable contact towards or away from the fixed contact, the semiconductor devices switching in a conduction on state or in an interdiction state depending on the position of the movable contact.