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Study on the Effect of Helium on the Dielectric Strength of Medium-Voltage Vacuum Interrupters

Author

Listed:
  • Paweł Węgierek

    (Faculty of Electrical Engineering and Computer Science, Lublin University of Technology, Nadbystrzycka 38A, 20-618 Lublin, Poland)

  • Michał Lech

    (Faculty of Electrical Engineering and Computer Science, Lublin University of Technology, Nadbystrzycka 38A, 20-618 Lublin, Poland)

  • Damian Kostyła

    (Faculty of Electrical Engineering and Computer Science, Lublin University of Technology, Nadbystrzycka 38A, 20-618 Lublin, Poland)

  • Czesław Kozak

    (Faculty of Electrical Engineering and Computer Science, Lublin University of Technology, Nadbystrzycka 38A, 20-618 Lublin, Poland)

Abstract

This paper presents the results of a comparative analysis of the dielectric strength of disconnecting vacuum interrupters operating on air and helium. The breakdown voltage U d was measured in the pressure range from 8.0 × 10 −4 Pa to 3.0 × 10 1 Pa for air and from 8.0 × 10 −4 Pa to 7.0 × 10 2 Pa for helium, while varying the interelectrode distance from 1.0 to 5.0 mm. Dedicated laboratory workstations were used to determine the actual pressure values in the vacuum interrupters tested and to precisely measure and record the dielectric strength results of the test object. It was found that the helium-filled vacuum interrupter maintains its full dielectric strength in significantly larger pressure ranges, while the air-filled vacuum interrupter loses its insulating properties. Thus, it is possible to make vacuum interrupters based on the working medium associated with pure helium, with larger working pressure ratings. Under such conditions, it is easier to maintain the tightness of the device and to limit cut-off currents and overvoltages associated with vacuum switchgear.

Suggested Citation

  • Paweł Węgierek & Michał Lech & Damian Kostyła & Czesław Kozak, 2021. "Study on the Effect of Helium on the Dielectric Strength of Medium-Voltage Vacuum Interrupters," Energies, MDPI, vol. 14(13), pages 1-14, June.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:13:p:3742-:d:580061
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    References listed on IDEAS

    as
    1. Marek Florkowski & Jakub Furgał & Maciej Kuniewski & Piotr Pająk, 2020. "Overvoltage Impact on Internal Insulation Systems of Transformers in Electrical Networks with Vacuum Circuit Breakers," Energies, MDPI, vol. 13(23), pages 1-14, December.
    2. Abderrahmane Beroual & Abderrahmane (Manu) Haddad, 2017. "Recent Advances in the Quest for a New Insulation Gas with a Low Impact on the Environment to Replace Sulfur Hexafluoride (SF 6 ) Gas in High-Voltage Power Network Applications," Energies, MDPI, vol. 10(8), pages 1-20, August.
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    Cited by:

    1. Paweł Węgierek & Damian Kostyła & Michał Lech & Czesław Kozak & Alicja Zielonka, 2023. "Pressure Monitoring in Medium-Voltage Vacuum Interrupters," Energies, MDPI, vol. 16(18), pages 1-12, September.
    2. Michał Lech & Paweł Węgierek, 2022. "Breakdown Initiation and Electrical Strength of a Vacuum Insulating System in the Environment of Selected Noble Gases at AC Voltage," Energies, MDPI, vol. 15(3), pages 1-16, February.
    3. Paweł Węgierek & Damian Kostyła & Michał Lech, 2023. "Directions of Development of Diagnostic Methods of Vacuum Medium-Voltage Switchgear," Energies, MDPI, vol. 16(5), pages 1-25, February.

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