International Comparison of Current Transformer Calibrations

An international comparison of current transformer calibrations between five metrology laboratories has been conducted. The measurements were made at current ratios ranging from 1 A: 1 A to 200 A: 1 A at 10, 100, and 200 percent of rated current and from 5 A: 5 A to 200 A: 5 A at 1, 10, 100, and 200...

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Bibliographic Details
Published in:IEEE transactions on instrumentation and measurement 1985-01, Vol.IM-34 (2), p.234-238
Main Authors: Schwitz, Wolfgang, Kampfer, Rudolf, Braun, Andreas, Souders, T. Michael, Moore, William J. M., Cassidy, Bernard R., Deacon, Thomas A.
Format: Article
Language:English
Subjects:
Calibration
Circuits
Councils
Current measurement
Current transformers
Electrical and electronic components, instruments and techniques
Exact sciences and technology
Frequency measurement
Instruments
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Laboratories
NIST
Physics
Transformer cores
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Summary:An international comparison of current transformer calibrations between five metrology laboratories has been conducted. The measurements were made at current ratios ranging from 1 A: 1 A to 200 A: 1 A at 10, 100, and 200 percent of rated current and from 5 A: 5 A to 200 A: 5 A at 1, 10, 100, and 200 percent of rated current, at a frequency of 50 Hz. Several ratios have also been compared at 60 Hz. Except at some low-level currents the results show very good agreement among the five laboratories. The current differences are typically within ±1 ppm and the phase displacements within ±1.5 μrad.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.1985.4315312