Single-phase Resistive Superconductor Electrical Current Limiter

This paper presents the analysis, design, construction and ac test results of low voltage single-phase resistive superconductor electrical current limiters. Two different types of resistive superconductor current limiter are presented: the first one is built with three concentric, cylindrical and helicoidal coils connected in parallel and the second one is built with two superposed cylindrical helicoidal coils connected in series and in opposite magnetic polarities. Both are built using the GEC Alstom CuNi matrix superconductor type C wire for ac applications, wound on G-10 tubes and the final assembly is mechanically arranged and immersed in a cryostat filled with liquid helium at 4K. The superconductor material in this wire is the NbTi alloy.12113861389Wu, Y., Yin, Y., Fault-current limiter applications in medium and high-voltage power distribution systems (1998) IEEE Trans. Industry Applications, 34, pp. 236-242. , Jan./FebMichael, P.C., Ryu, K., Tsukamoto, O., Quench currents of a C. superconductor in supercritical helium (1995) IEEE Trans. Appl. Superconduct., 5 (2). , JunTeklletsadik, K., Saravolac, M.P., Development of a 7.5 MVA superconducting fault current limiter (1999) IEEE Trans. Appl. Superconduct., 9 (2). , JunHomrich, R.P., Filho, E.R., Pinatti, D.G., Helicoidal single-layer cylindrical coil self-inductance evaluation: A didactic method (2001) IEEE Trans. Education, 44 (2). , MayWilson, M.N., (1983) Superconductor Magnets, , Claredon Press Oxfor