A new model of fault current limiter using YBCO thin film

Resistive fault current limiters which consist of a YBCO film and a normal conducting film were constructed, The YBCO film was connected by indium wires to the normal conducting film in parallel at intervals of about 10 mm to increase the allowed voltage across the fault current limiter during the current-limiting operation. Current limiting experiments show that an allowed voltage across the fault current limiter during current-limiting operation of over 13 V/cm was achieved. Moreover, by combining in parallel 2 sets of 3 serially connected fault current limiters fabricated using 100 mm x 10 mm YBCO film, a rated power of over 20 kVA is obtained.