The Operational Characteristics of High-speed Interrupter by Fault Types

고장 유형별 고속 인터럽터의 동작 특성

  • Received : 2012.12.10
  • Accepted : 2013.01.02
  • Published : 2013.02.01


With the increasing power demands, size of the fault current in electrical grids is steadily increasing, and it exceeds the breaking capacity of circuit breakers. To effectively cope with these problems, a high-speed interrupter was suggested. The high-speed interrupter provides fault current with a bypass to a fault current limiter in case of accidents and consequently, fault current can be restricted. In this study, behavioral characteristics of high-speed interrupter were analyzed by accident types occurred in a distribution system. When accidents occurred, a and b contact of the high-speed interrupter were turned-off and then, turned-on. Accordingly, fault current flowed to the circuit connected to a current limiting element, and the fault current limiter restricted fault current to within a half-cycle. Nevertheless, the behavior of the high-speed interrupter was slowed down by a switching surge. As a result, fault current was confirmed to be restricted not to within the anticipated half-cycle, but to after a half-cycle. Moreover, the behavioral characteristics of the high-speed interrupter changed not only by accident types, but by behaviors of R, S, and T phases. This was due to the errors in stroke lengths of the high-speed interrupters, which resulted in a slight time discrepancy among three interrupters. In addition, the switching behaviors of the b and a contact were confirmed not to have coincided due to the switching surge; b contact behaved first and a contact followed. because of this, accuracy of stroke length and switching surges through the solenoid suction increases may be necessary to resolve.


Supported by : 한국에너지기술평가원(KETEP)


  1. H. S. Choi, O. B. Hyun, H. R. Kim, K. B. Park, "Switching properties of hybrid type superconducting fault current limiter using YBCO stripes" IEEE Trans, on Appl. Superconduct, vol. 12, pp. 1833 - 1838, Sep. 2002.
  2. H. S. Choi, S. H. Lim, "Operating Performance of the Flux-Lock and the Transformer Type Superconducting Fault Current Limiter Using the YBCO Thin Films," IEEE Trans, on Appl. Superconduct, vol. 17, pp. 1823 - 1826, Jun. 2007.
  3. R. Kreutz, J. Bock, F. Breuer, K. P. Juengst, M. Kleimaier, H.-U. Klein, D. Krischel, M. Noe, R. Steingass, and K. H. Weck, "System technology and test of curl 10, a 10 kV, 10 MVA resistive high-Tc superconducting fault current limiter," IEEE Trans. on Appl. Superconduct., vol. 15, pp. 1961-1964, 2005.
  4. M. H. Kim, S. H. Lim, J. F. Moon, J. C. Kim, "Method of recloser-fuse coordination in a power distribution system with superconducting fault current limiter", IEEE Trans. on Appl. Superconduct., vol. 20, pp. 1164-1167, 2010.
  5. O. B. Hyun, K. B. Park, J. W. Sim, H. R. Kim, S. W. Yim, and I. S. Oh, "Introduction of a Hybrid SFCL in KEPCO Grid and Local Points at Issue," IEEE Trans. on Appl. Superconduct., vol. 19, pp. 1946-1949, 2009.
  6. S. K. Choi, H. B. Kang, "Three-Dimensional Finite Element Analysis of a Vacuum Interrupter", Trans. KIEE, vol. 48C, no. 10, pp. 693-698, Oct.1999.
  7. I. G. Im, H. S. Choi, B. I. Jung, "Characteristics of a FCL Applying Fast Interrupter According to the Current Limitation", Trans KIEE, vol. 61, no. 11, pp. 1752-1757, Nov. 2012.