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논문 기본 정보

자료유형
학술저널
저자정보
오성용 (Korea Electric Power Research Institute, Superconductivity & Applications Group) 임성우 (Korea Electric Power Research Institute, Superconductivity & Applications Group) 유승덕 (Korea Electric Power Research Institute, Superconductivity & Applications Group) 김혜림 (Korea Electric Power Research Institute, Superconductivity & Applications Group) 현옥배 (Korea Electric Power Research Institute, Superconductivity & Applications Group)
저널정보
한국초전도학회 Progress in superconductivity Progress in superconductivity 제10권 제1호
발행연도
2008.1
수록면
45 - 49 (5page)

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For the development of superconducting fault current limiters (SFCLs), fault current limiting elements were fabricated out of Bi-2212 bulk tubes and tested. The SFCL elements consisted of tube shaped Bi-2212 bulks and metal shunts for the stabilizers. Firstly, the Bi-2212 bulk tubes were processed based on a design of monofilar coils in order to acquire large resistance and high voltage rating. 300 mm-long Bi-2212 tubes were designed to have the current path of 410 cm in length with 24 turns and 41 mm in diameter. The processed monofilar coil, as designed, had 300 A $I_c$ at 77 K. The fabricated superconducting monofilar coils were affixed to Cu-Ni alloy as that of stabilizers. The Cu-Ni alloys were processed to have the same shape of the superconducting monofilar coils. The Cu-Ni coil had resistivity of 32 ${\mu}{\Omega}$-cm at 77 K and 37 ${\mu}{\Omega}$-cm at 300 K. The metal shunts were attached to the outside of the Bi-2212 monofilar coil by a soldering technique. After the terminals made of copper were attached to both ends of the superconductor-metal shunt composite, the gap between the turns and the surface of the elements was filled with an epoxy and a dense mesh made of FRP in order to enhance the mechanical strength. The completed SFCL elements went through fault tests, and we confirmed that the voltage rating of 143 $V_{rms}$ (E =0.35 $V_{rms}$/cm) could be accomplished.

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