Quick response characteristics on a persistent-current-switch in a type of transformer

Abstract In order to deal with unscheduled accidents like as the service interruption in electric power systems, a persistent-current-switch with quick response and large current capacity is necessary to be developed. As the preliminary stages for this purpose, we developed a new persistent-current-switch of a current transformer type, of which switch-OFF time delay is about 5 msec, switch-ON time delay about 100 msec and current capacity 80A.