Application of the Field-Circuit Method for the Computation of Measurement Properties of Current Transformers With Cores Consisting of Different Magnetic Materials

We report on results of research (magnetic field distributions of current transformers, current error, and phase displacement diagrams) on the influence of two different magnetic materials in a core construction on transformation errors of a current transformer. We made analyses of the electromagnetic field distribution for different cases of current transformers and carried out computations based on the finite-element numerical method. We compared the results with tests of a real-life model.