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Comparative Tests of Partial Discharges in Nomex ® 910 Paper and Cellulose Paper

Author

Listed:
  • Hubert Moranda

    (Institute of Electric Power Engineering, Poznan University of Technology, Piotrowo 3A, 61-138 Poznan, Poland)

  • Hanna Moscicka-Grzesiak

    (Institute of Electric Power Engineering, Poznan University of Technology, Piotrowo 3A, 61-138 Poznan, Poland)

  • Piotr Przybylek

    (Institute of Electric Power Engineering, Poznan University of Technology, Piotrowo 3A, 61-138 Poznan, Poland)

  • Krzysztof Walczak

    (Institute of Electric Power Engineering, Poznan University of Technology, Piotrowo 3A, 61-138 Poznan, Poland)

  • Radoslaw Szewczyk

    (DuPont, Postepu 17B, 02-676 Warszawa, Poland)

Abstract

The article presents the results of comparative investigations of partial discharges in two insulation systems; aramid-enhanced cellulose paper-mineral oil, and pure cellulose paper-mineral oil. Partial discharges were investigated in a diagonal electric field with vertical and horizontal components. This field is treated as the most dangerous for insulation. The research was carried out on Nomex ® 910 paper and cellulose paper samples, each paper being 0.25 mm thick. Samples of the two materials were tested at four levels of moisture. The inception voltage of partial discharges of all samples tested decreased as their moisture content increases. It was also proved that Nomex ® 910 has a significantly higher partial discharge inception voltage than the cellulose paper, although this difference decreased with increasing moisture content.

Suggested Citation

  • Hubert Moranda & Hanna Moscicka-Grzesiak & Piotr Przybylek & Krzysztof Walczak & Radoslaw Szewczyk, 2020. "Comparative Tests of Partial Discharges in Nomex ® 910 Paper and Cellulose Paper," Energies, MDPI, vol. 13(3), pages 1-8, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:3:p:647-:d:315951
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    References listed on IDEAS

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    1. Wojciech Sikorski & Krzysztof Walczak & Piotr Przybylek, 2016. "Moisture Migration in an Oil-Paper Insulation System in Relation to Online Partial Discharge Monitoring of Power Transformers," Energies, MDPI, vol. 9(12), pages 1-16, December.
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