Onsite Calibration of a Current Transformer Using a Rogowski Coil

Onsite Calibration of a Current Transformer Using a Rogowski Coil

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 generatio...

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Veröffentlicht in:IEEE transactions on instrumentation and measurement 2009-04, Vol.58 (4), p.1054-1058
Hauptverfasser: Suomalainen, E.-P., Hallstrom, J.K.
Format: Artikel
Sprache:eng
Schlagworte:
AC generators
Calibration
Coiling
Coils
Current measurement
Current transformers
High current
high voltage
instrument current transformer (CT)
Instrumentation
Instruments
Onsite
onsite calibration
Power generation
Rogowski coil
Substations
Transformers
Uncertainty
Voltmeters
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Beschreibung
Zusammenfassung: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.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2008.2007031