Current Transformers and the Accuracy of Electrical Powers and Energies Measurements

摘要

The measurement of the electrical active and reactive powers and energies in the electrical networks imposes the use of the current transformers. The instrument transformers allow the measurement of the effective value but, in certain cases, one can note errors to the measurement of the electric power and energy. The work presents the explanations of theories and proposes methods of correction of the errors of energy measurement due to the instrument transformers.