The　characteristics　of　a　repulsion　mechanism　driven　by　various　short-circuit　currents　in　a　superconducting　fault　current　limiter　(SFCL)　are　investigated.　The　velocity　of　the　repulsion　mechanism　was　simulated　with　various　driving　currents,　and　a　design　was　proposed.　To　ensure　that　the　short-circuit　current　flowing　through　the　superconducting　coil　can　be　cut　off　within　a　short　time　(10　ms),　a　current　interruption　test　with　a　12-kV　vacuum　interrupter　was　conducted,　revealing　highly　reliable　interruption　with　various　opening　velocities　(0.6-1.5　m/s).　With　a　quick　response,　the　SFCL　worked　well　for　various　short-circuit　currents　ranging　from　100　A　(critical　current　of　the　superconducting　coil)　to　40　kA.