Nanocrystalline cores are made from metallic-glass materials with a crystalline structure. These cores are distinguished by superior permeability coupled with low power loss and high saturation. These advantages have made them more popular than any other core material for novel applications.The crystalline atomic structure of a nanocrystalline core creates superior magnetic properties, including high saturation and very high permeability across a wide frequency range. Nanocrystalline alloys also exhibit low AC loss and high efficiency, even at high temperatures. Nanocrystalline cores can also be annealed under magnetic fields to align the magnetic domains and provide superior magnetic properties. Characteristic: High permeability—Increase CT’s accuracy level. High saturation induction —Decrease CT meters security factor Excellent cost performance—less weight, smaller volume. Good temperature stability—Keep stable from -55℃ to 120℃ for long time. Craftsmanship Nanocrystalline alloys are formed by adding a certain amount of glass forming agent to the molten metal, and rapidly quenching and casting using a narrow ceramic nozzle under high temperature melting conditions. Amorphous alloys have the similar characteristics of glass structure, which not only make them have excellent mechanical properties, physical properties and chemical properties, but more importantly, the new technology of producing amorphous alloys using this rapid quenching method is less than the cold-rolled silicon steel sheet process. 6 to 8 processes can save energy consumption by 60% to 80%, which is an energy-saving, time-saving and efficient metallurgical method. Moreover, the amorphous alloy has low coercivity and high magnetic permeability, and its core loss is significantly lower than that of oriented cold-rolled silicon steel sheet, and its no-load loss can be reduced by about 75%. Therefore, the use of amorphous alloys instead of silicon steel sheets to manufacture transformer cores is one of the main means to save energy and reduce consumption in today’s powergrid equipment.