A calibration laboratory for Rogowski Coil used in energy systems and power electronics

The use of the well known Rogowski Coil (RC) sensor gained a wide spread due to its many applications in testing laboratories, industrial measuring instruments, power electronics and unconventional measuring systems used in energy transport networks. These sensors have been rendered valuable due both to the special dynamic properties, lack of saturation etc. and to the important progresses made in the acquisition and processing systems of the experimental data. The drawing up of the first IEC standard referring to high current measurement (IEC 62475) where the metrological properties of the shunts and RC are stated both in permanent and in transient duty are proofs of the progresses in this domain. After a short review of the main RC types, their operating duties, specific testing installations and measurement uncertainty are analysed. At the same time as the accreditation of the High Current Calibration Laboratory granted by DKD (German Calibration Service) in 2008, there are placed at disposal the own standards with traceability to the international standards and certain RC specific tests described in this paper could be added to the tests already evaluated within the usual frame of accreditation extension.