Short Description:

Magnetic core of current transformer is one of the core components of current transformer. Its main function is to enhance magnetic field and realize electromagnetic induction.
Common core materials of current transformer include ferrite, permalloy and nanocrystals. The ferrite core has low cost and high resistivity, which can effectively reduce eddy current loss. Permalloy core has high permeability and low coercivity, but its price is relatively high. The nanocrystalline core has the advantages of high permeability and low loss.
The shape of the magnetic core is usually circular, rectangular, etc. Annular magnetic core can provide a more uniform magnetic field distribution, reduce magnetic leakage, improve the measurement accuracy; Rectangular cores are easy to install and manufacture.
In the current transformer, the performance of the magnetic core directly affects the precision, linearity, stability and response speed of the transformer. The high quality magnetic core can ensure that the transformer can accurately convert the large current on the primary side to the small current on the secondary side, providing a reliable signal for the measurement, protection and control of the power system.
In addition, the saturation characteristics of the magnetic core are also crucial. When the primary current is too large, the magnetic core may be saturated, resulting in transformer output distortion, affecting the normal operation of measurement and protection functions. Therefore, in the design and selection of current transformer core, it is necessary to consider a variety of factors to meet the needs of different application scenarios.