Onsite calibration of a current transformer using a Rogowski Coil

Esa-Pekka Suomalainen, Jari K. Hällström

Research output: Contribution to journalArticleScientificpeer-review

59 Citations (Scopus)


This paper describes a reference current-measuring system for the onsite calibration of high-voltage current transformers. The reference current-measuring system consists of a Rogowski coil, a current shunt, two digitizing voltmeters, and a computer to control the voltmeters. The method of generation of the high current and the uncertainty of the calibration are discussed. The results of a calibration performed onsite on a 400-kV substation are presented. Uncertainties of 300 muA/A for ratio and 1 angular minute for phase displacement were achieved with this method onsite.
Original languageEnglish
Pages (from-to)1054-1058
JournalIEEE Transactions on Instrumentation and Measurement
Issue number4
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed


  • High current
  • Rogowski coil
  • high voltage
  • instrument current transformer (CT)
  • onsite calibration


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