Influence of different load of the secondary winding on measurement properties of current transformers with core made from different magnetic materials

摘要

Results of research on the influence of different load on current transformers' transformation errors when cores consist of two different magnetic materials are presented in this paper. Analyses of the electromagnetic field distribution for different cases of load of the secondary winding were performed (magnetic field distributions of current transformers, current error and phase displacement diagrams). Computations were carried out based on the finite element numerical method and their results were compared with tests of real-life models.