Abstract:The power load of metallurgical enterprises is generally large, and the power distribution system generally adopts high-voltage and large-capacity main transformer. And the short-circuit current at the low voltage busbar will be very high. The conventional measures to limit the short-circuit current have their own defect, and there are also engineering implementation problems in the renovation project. The zero loss depth current limited device has wide applicability. It can limit the short-circuit current, save energy, reduce the installation space, and realize the safe, high-energy and efficient operation of the distribution network. It has the value of popularization and application in similar projects.