| Title |
Operating Properties for a Resistive SFCL of YBCO Thin Films |
| Authors |
최효상(Choe, Hyo-Sang) ; 현옥배(Hyeon, Ok-Bae) ; 김혜림(Kim, Hye-Rim) ; 황시돌(Hwang, Si-Dol) ; 김상준(Kim, Sang-Jun) ; 문승현(Mun, Seung-Hyeon) ; 한병성(Han, Byeong-Seong) |
| Keywords |
Superconducting fault current limiter ; YBCO film ; Hot spot ; Quench time ; Heat dissipation |
| Abstract |
We fabricated a resistive superconducting fault current limiter (SFCL) of a meander type based on a YBCO film with the meander cross section of 5 × 10^{-6}cm^2, and performed current limitation experiments. The film was coated quench current was 9.6 Apeak at 60 Hz, and the fast quench time was 0.63 msec. The resistance of the limiter continuously increased for three cycles dut to the temperature rise in the gold layer. The temperature of the current limiting element reached the room temperature in 11 msec, 150°C in 54 msec after quench, and was saturated afterwards. For 45°and 90°faults the fast quench times were 0.56 msec and 0.26 msec, respectively. The quench time is believed to be reduced because the fault occurred when the current was either increasing or at the peak value. This limiter effectively limited the fault current to about 1/5 of the potential current with no SFCL right after the fault and to about 1/8.5 in three cycles. We confirmed that the gold layer effectively carried out the role of heat dissipation as the SFCL was quenched. |