Superconducting fault current limiter

A three-phase superconducting current limiter, comprising:

• three superconducting current limiting units provided respectively for three phases constituting an AC electric path, each current limiting unit comprising,
• a first current limiting element formed by a non-inductive winding of a superconducting wire having a critical current value that is lower than a limit current value of the electric path and that is higher than a rated current value, and
• a second current limiting element having a fixed impedance value and connected in parallel to the first current limiting element;
• a cryostat containing said three superconducting current limiting units which are situated in the cryostat so that when the cryostat is filled with a cryogen the three superconducting current limiting units are immersed in the cryogen;
• a separator for electromagnetically separating the three current limiting units for the corresponding phases, said separator being provided within said cryostat, said separator comprising one of a superconducting member and a member having a superconducting layer on a surface thereof;
• and
• a superconducting coating on an inner surface of the cryostat.