Current Limiting and Normal Operation Characteristics of Parallel Connected Fault Current Limiting Elements with YBCO Films

Fault current limiting experiments were performed for parallel connected fault current limiting elements (FCL) which were arranged polygonal and on plane. It is found that the arrangement didn't depend on the current limiting characteristics. The current re-distribution was observed at early stage of quench, and it is found that the current re-distribution accelerate the quench. Moreover, the normal operation tests were carried out for the parallel connected FCL, and the loss of the polygonal arrangement was about 1/5 comparing that of the on plane arrangement. Therefore, the advantage of the polygonal arrangement was confirmed.