Quench Characteristic of Superconducting Transformer by Inrush Current

As well known, an inrush current of transformer reaches about several times larger than the rated current. When such a large inrush current flows into a superconducting transformer, it will induce a quench of superconducting windings. In this paper, we fabricated a small experimental superconducting transformer, and investigated the behavior of superconducting winding against the inrush current. The experimental result shows that a superconducting winding quenches for such a large inrush current, but it returns quickly to superconducting state in few cycles spontaneously.