A superconducting arcing induction type DC circuit breaker includes a superconducting fault current limiter and an arcing induction type DC circuit breaker connected in series to each other. The arcing induction type DC circuit breaker includes an induction member that has a through-hole, is continuously formed in a 360-degree direction, and has a certain shape and thickness, and an induction needle that protrudes from an inner surface of the induction member toward a center of the induction member. A contact point where an anode and a cathode, which are mechanical contacts, approach from opposite directions and come into contact with each other is formed in the through-hole of the induction member, and the anode and the cathode are separated in a direction far away from each other. The induction needle induces arc generated upon contact opening when the anode and the cathode are separated from each other in the event of system accident of DC power or AC power, and the induction member quenches the induced arc by the flow of the induced arc to ground through a ground line.

A mechanically operating superconducting switch has two superconducting wires, a respective end of each superconducting wire being embedded in a respective block of superconducting material. A mechanical arrangement is provided for driving respective contact surfaces of the blocks into physical contact with each other, and for separating those services.

Embodiments of the disclosure provide a current protection device with a mutual reactor including a first winding and a second winding. The current protection device is a subcomponent of a previously developed fault current limiter. The current protection device protects the superconductor from potential damage. The current protection device may include a coil electrically connected in series with the first winding or the second winding, an actuator mechanically coupled at an output of the coil, and an electrical interrupter electrically connected to the first and second windings, wherein the actuator is communicatively coupled with the electrical interrupter to actuate a moveable contact of a set of breaker contacts of the electrical interrupter. In some embodiments, the first and second windings are arranged in parallel to one another. In some embodiments, the coil is electrically coupled to an output of the first winding or the second winding.

Embodiments of the disclosure provide a current protection device for a fault current limiter, the current protection device including a detection circuit electrically coupled between a current transformer and a pneumatic timer, and an electrical vacuum interrupter (EVI) coupled to a pneumatic cylinder. In some embodiments, the EVI includes a set of breaker contacts, wherein the pneumatic timer is communicatively coupled with the pneumatic cylinder to actuate a moveable contact of the set of breaker contacts. In some embodiments, the detection circuit is configured to detect a current of the current transformer, and to provide a control signal to the pneumatic cylinder to open or close the set of breaker contacts based on the detected current.

A superconducting arcing induction type DC circuit breaker includes a superconducting fault current limiter and an arcing induction type DC circuit breaker connected in series to each other. The arcing induction type DC circuit breaker includes an induction member that has a through-hole, is continuously formed in a 360-degree direction, and has a certain shape and thickness, and an induction needle that protrudes from an inner surface of the induction member toward a center of the induction member. A contact point where an anode and a cathode, which are mechanical contacts, approach from opposite directions and come into contact with each other is formed in the through-hole of the induction member, and the anode and the cathode are separated in a direction far away from each other. The induction needle induces arc generated upon contact opening when the anode and the cathode are separated from each other in the event of system accident of DC power or AC power, and the induction member quenches the induced arc by the flow of the induced arc to ground through a ground line.

Embodiments of the disclosure provide a current protection device with a mutual reactor including a first winding and a second winding. The current protection device is a subcomponent of a previously developed fault current limiter. The current protection device protects the superconductor from potential damage. The current protection device may include a coil electrically connected in series with the first winding or the second winding, an actuator mechanically coupled at an output of the coil, and an electrical interrupter electrically connected to the first and second windings, wherein the actuator is communicatively coupled with the electrical interrupter to actuate a moveable contact of a set of breaker contacts of the electrical interrupter. In some embodiments, the first and second windings are arranged in parallel to one another. In some embodiments, the coil is electrically coupled to an output of the first winding or the second winding.

Embodiments of the disclosure provide a current protection device for a fault current limiter, the current protection device including a detection circuit electrically coupled between a current transformer and a pneumatic timer, and an electrical vacuum interrupter (EVI) coupled to a pneumatic cylinder. In some embodiments, the EVI includes a set of breaker contacts, wherein the pneumatic timer is communicatively coupled with the pneumatic cylinder to actuate a moveable contact of the set of breaker contacts. In some embodiments, the detection circuit is configured to detect a current of the current transformer, and to provide a control signal to the pneumatic cylinder to open or close the set of breaker contacts based on the detected current.