fa عمومى General پژوهشي Research Development of the electric networks led to more interconnection in this system, therefore high level of short circuit faults flows in the networks. Many destructive damages such as instability, insulation problems and voltage mitigation can highly play unwanted influences on the system’s equipment. Using appropriate protection devices like high voltage fuses, fast switches, and such devices reduce these destructive effects. Superconducting Fault Currents Limiter (SFCL) as one of developing method of fault current reducti Current limiter, Superconducting fault current limiter, AC railway system 10 14 http://ijrare.iust.ac.ir/browse.php?a_code=A-10-25-7&slc_lang=fa&sid=1 S. M. Mousavi G Mousavi G 180031947532846001563 180031947532846001563 Yes School of Railway Engineering, Iran University of Science and Technology, Iran School of Railway Engineering, Iran University of Science and Technology, Iran