Electric furnace coils, yokes, water-cooled cables, and components that carry large currents in power cabinets all require water cooling. The cooling water system is a key system in the intermediate frequency smelting equipment, especially the power cooling system is more critical. Therefore, our company has summarized the practical experience over the years. Especially by digesting and absorbing the advanced technology of world-renowned electric furnace companies, we have designed a unique medium frequency water cooling closed circulation system. The system consists of an electric furnace cooling system, a power supply cooling system and an emergency water system.