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The Method to Determine the Turns Ratio Correction of the Inductive Current Transformer

Author

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  • Ernest Stano

    (Institute of Mechatronics and Information Systems, Lodz University of Technology, 90-924 Lodz, Poland)

Abstract

This paper presents the method for evaluation of the turns ratio correction of the inductive current transformer using the magnetization curves determined at the non-load state and in the load conditions. The presented method may be applied to determine even a fractional winding correction factor. The standard IEC 61869-2 provides the method to determine the turns ratio correction of the tested CT from the measured rms values of voltages on its primary and secondary winding in the non-load state. However, this approach is limited in determining the significant changes in the number of turns of the secondary winding. Moreover, the paper presents the influence of the applied turns ratio correction on the frequency characteristics of the current error and phase displacement of the inductive current transformers evaluated for the transformation of the distorted current.

Suggested Citation

  • Ernest Stano, 2021. "The Method to Determine the Turns Ratio Correction of the Inductive Current Transformer," Energies, MDPI, vol. 14(24), pages 1-16, December.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:24:p:8602-:d:707061
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    Citations

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    Cited by:

    1. Ernest Stano & Piotr Kaczmarek & Michal Kaczmarek, 2022. "Understanding the Frequency Characteristics of Current Error and Phase Displacement of the Corrected Inductive Current Transformer," Energies, MDPI, vol. 15(15), pages 1-16, July.
    2. Michal Kaczmarek & Artur Szczęsny & Ernest Stano, 2022. "Operation of the Electronic Current Transformer for Transformation of Distorted Current Higher Harmonics," Energies, MDPI, vol. 15(12), pages 1-10, June.
    3. Michal Kaczmarek & Ernest Stano, 2023. "New Approach to Evaluate the Transformation Accuracy of Inductive CTs for Distorted Current," Energies, MDPI, vol. 16(7), pages 1-15, March.
    4. Ernest Stano & Piotr Kaczmarek & Michal Kaczmarek, 2022. "Why Should We Test the Wideband Transformation Accuracy of Inductive Current Transformers?," Energies, MDPI, vol. 15(15), pages 1-12, August.
    5. Michal Kaczmarek & Ernest Stano, 2023. "Review of Measuring Methods, Setups and Conditions for Evaluation of the Inductive Instrument Transformers Accuracy for Transformation of Distorted Waveforms," Energies, MDPI, vol. 16(11), pages 1-17, May.
    6. Michal Kaczmarek & Piotr Kaczmarek & Ernest Stano, 2022. "The Effect of the Load Power Factor of the Inductive CT’s Secondary Winding on Its Distorted Current’s Harmonics Transformation Accuracy," Energies, MDPI, vol. 15(17), pages 1-11, August.
    7. Michal Kaczmarek & Ernest Stano, 2023. "Challenges of Accurate Measurement of Distorted Current and Voltage in the Power Grid by Conventional Instrument Transformers," Energies, MDPI, vol. 16(6), pages 1-17, March.
    8. Michal Kaczmarek & Piotr Kaczmarek & Ernest Stano, 2022. "Evaluation of the Current Shunt Influence on the Determined Wideband Accuracy of Inductive Current Transformers," Energies, MDPI, vol. 15(18), pages 1-12, September.

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