Patent ID: 8804288

Claim:
An apparatus for limiting transmission of fault current, the apparatus comprising: a first enclosure electrically decoupled from ground, such that the first enclosure is electrically isolated from ground potential; first and second terminals, at least one of which is electrically connected to first one or more current carrying lines; and a first superconducting circuit contained in the first enclosure, the first superconducting circuit electrically connected to the first and second terminals, wherein the first enclosure is maintained at same electrical potential as the first one or more current carrying lines; a first conductor interposed between the superconducting circuit and at least one of the first one or more current carrying lines, the first conductor being directly connected to the first one or more current carrying lines and to the first enclosure, wherein the first conductor is directly connected to the first superconducting circuit; a second enclosure; third and fourth terminals, at least one of which is electrically connected to second one or more current carrying lines; a second superconducting circuit contained in the second enclosure, the second superconducting circuit electrically connected to the third and fourth terminals; and a second conductor interposed between the second superconducting circuit and at the second one or more current carrying lines, the second conductor being directly connected to the second one or more current carrying lines and to the second enclosure, wherein the second enclosure is maintained at same electrical potential as the second one or more current carrying lines.