The higher the magnetic conductivity of the transformer core, the smaller the measurement error and the higher the accuracy. The magnetic core of the iron - based nano-crystal mutual inductor has the initial magnetic permeability and temperature stability similar to that of permalloy. The nanocrystalline core is lighter and cheaper in the same magnetic core size. The magnetic core of nanocrystalline alloy transformer is widely used in current measurement, digital energy meter and leakage protection circuit due to high magnetic conductivity, high saturation magnetism and low cost.
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