A Fault Current Limiter (FCL) comprising a magnetisable limb, an electrically conductive coil associated with the magnetisable limb and arranged to induce a field in the limb member and magnets spaced such that the coil is positioned intermediate the spaced magnets. Magnetisable shield elements are positioned at either end of the coil.

A Fault Current Limiter (FCL) comprising a magnetisable limb, an electrically conductive coil associated with the magnetisable limb and arranged to induce a field in the limb member and magnets spaced such that the coil is positioned intermediate the spaced magnets. Magnetisable shield elements are positioned at either end of the coil.

A Fault Current Limiter (FCL) comprising a magnetisable limb, an electrically conductive coil associated with the magnetisable limb and arranged to induce a field in the limb member and magnets spaced such that the coil is positioned intermediate the spaced magnets. Magnetisable shield elements are positioned at either end of the coil.

A fault current limiter system including a fault current limiter and a variable shunt current splitting device. The current splitting device includes first and second conductive windings, wherein the first conductive winding is connected in parallel with the fault current limiter and is configured to carry current in a first direction. The second conductive winding is electrically connected in series with the fault current limiter and is configured to carry current in a second direction opposite to the first direction so that the reactance of the first winding is negated by the reactance of the second winding during steady state operation of the fault current limiter system. Thus, a first portion of a steady state current is conveyed through the fault current limiter and a second portion of the current is conveyed through the current splitting device. The steady state current load on the fault current limiter is thereby reduced.

A fault current limiter may include a current limiting leg to transmit a first current and a control leg in parallel with the current limiting leg, the control leg to transmit a second current. The control leg may include a plurality of power electronic modules arranged in electrical series with one another, and a bypass power electronic module arranged in electrical series with the plurality of power electronic modules. The control leg may further include a plurality of current monitors arranged electrically in series with the plurality of power electronic modules and the bypass power electronic module, and at least one triggering circuit, wherein the plurality of current monitors is electrically coupled to the at least one triggering circuit, and wherein the at least one triggering circuit is coupled to at least one of: the plurality of power electronic modules, and the bypass power electronic module.

A system is provided. The system includes a plurality of uninterruptible power supplies (UPSs), a ring bus, a plurality of chokes, each choke of said plurality of chokes electrically coupled between a respective UPS of said plurality of UPSs and the ring bus, and a plurality of series compensators, each series compensator of the plurality of series compensators electrically coupled between an associated choke of the plurality of chokes and the ring bus.

A supply device supplies electrical power to an electrical assembly at a high-voltage potential. The supply device has a series circuit composed of at least one series resistor and a supply unit. The series circuit can be connected to an energy store and the supply unit can be connected to the assembly that is to be supplied with power. The supply device further has a fuse element, by which a short-circuit current through the supply unit can be electrically interrupted in the event of a short circuit.

A capacitor system includes a first capacitor and a second capacitor, having essentially the same capacitance, and a current limiter. A first terminal of the first capacitor and a first terminal of the second capacitor are connectable to a first busbar. The second terminal of the first capacitor is coupled to a first terminal of the current limiter and the second terminal of the second capacitor is coupled to a second terminal of the current limiter. The current limiter has at least one third terminal connectable to a second busbar. The current limiter includes a first inductive element and a second inductive element having essentially the same inductance and being magnetically coupled with opposite polarity.

A fault current limiter (FCL) has a core structure with a first and second magnetisable core members and an AC magnetomotive force source configured to generate a varying magnetic flux in at least a portion of the first and second magnetisable core members. Static magnetomotive force sources being positioned to provide a magnetic circuit within at least part of the magnetisable core members. The FCL may have a ring core structure and the static magnetomotive force sources may include a mitred or tapered joint interface with the core member.

A fault current limiter (FCL) has a core structure with a first and second magnetisable core members and an AC magnetomotive force source configured to generate a varying magnetic flux in at least a portion of the first and second magnetisable core members. Static magnetomotive force sources being positioned to provide a magnetic circuit within at least part of the magnetisable core members. The FCL may have a ring core structure and the static magnetomotive force sources may include a mitered or tapered joint interface with the core member.