The recent growth of power circuit capacities has caused fault currents to increase. Since the protection of power systems from the fault currents is very important, it is needed to develop a fault current limiter.

A fault current limiter is required to assure (1) rapid reaction to fault currents, (2) how impedance in normal operation and (3) large impedance during fault conditions. A super conducting fault current limiter (SCFCL) can meet these requirements superconductors, because of their sharp transition from zero resistance at normal current to finite resistance at higher current densities, are tailor-made for use in FCLs.

The purpose of this paper was the study of surge current protection using superconductors. The SCFCL offers efficient advantages to power system and opens up a major application for super conducting materials..