Application of the Protective Current Transformers in Measurement Systems for Energy Management Purposes

This paper describes possibilities of protective current and voltage transformers application in measurement systems for the energy management purposes based on microprocessor protective relays. Influence of protective current transformers on accuracy of current, voltage and power measurement by microprocessor based protective relays is particularly discussed. Theoretical consideration and experimental results are presented too. Based on obtained results, the necessary steps to ensure accuracy of measurements are presented.