Current transformer with nanocrystalline alloy core for measurement

In this paper some considerations about the application of nanocrystalline alloys in toroidal cores for current transformers used for measurement purposes are presented. Based on the electromagnetic properties of these materials, such as high relative magnetic permeability, magnetic flux density saturation, high resistivity and low hysteresis losses are discussed. Also, will be discussed how the former characteristics affect the current transformer performance. From experimental results, it can be concluded that the use of nanocrystalline alloys in the current transformer cores can contribute to the reduction of phase errors, improving thus the accuracy class.