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Development of high temperature superconducting fault current limiting transformer (HTc-SFCLT) with Bi2212 bulk coil

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7 Author(s)
Kurupakorn, C. ; Dept. of Electr. Eng., Nagoya Univ., Japan ; Hayakawa, N. ; Kashima, N. ; Nagaya, S.
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We have been developing a high temperature superconducting fault current limiting transformer (HTc-SFCLT) with functions of both superconducting transformer in normal operating condition and superconducting fault current limiter in fault condition. The ratings of the developed HTc SFCLT are 3-phase, 6.25 kVA, 275/105 V. The secondary coil consists of melt cast processed (MCP)-BSCCO2212/CuNi composite bulk monofilar coils, whereas the primary coil is composed of a copper coil, both of which are immersed in liquid nitrogen bath together with the iron core. Experimental results revealed the operational feasibility of HTc-SFCLT through no-load and short-circuit tests, current limiting test and recovery test.

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Applied Superconductivity, IEEE Transactions on  (Volume:14 ,  Issue: 2 )