Vacuum breakdown in microgaps between stainless-steel electrodes powered by direct-current and pulsed electric field

Klas, M.; Čermák, P.; Borkhari, Arian Fateh; Satrapinskyy, Leonid; Matejčík, Štefan; Radjenović, Branislav; Radmilović-Radjenović, M.

doi:10.1016/j.vacuum.2021.110327

Cited by 7 publications

(1 citation statement)

References 40 publications

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“…In the meantime, more craters may form on the electrode and thus cause a further increase in current. When the amplitude of this current exceeds a certain value, the limiting temperature in the anode region is also exceeded and the discharge develops according to the anode mechanism [23][24][25].…”

Section: Initiation Of An Electrical Discharge In a Vacuum At Ac Voltagementioning

confidence: 99%

Breakdown Initiation and Electrical Strength of a Vacuum Insulating System in the Environment of Selected Noble Gases at AC Voltage

Lech¹,

Węgierek²

2022

Energies

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This paper presents the results of testing the electrical strength of an insulating system in a vacuum obtained from three noble gases: argon, neon, helium, and air. The breakdown voltages were measured for contact gaps of 1 mm and 2 mm. A difference was observed in the pressure range where the electrical strength was kept constant. The chamber filled with helium residual gases lost its insulating properties at the highest pressure among the tested gases (2.00 × 100 Pa at contact gap d = 2 mm), while the chamber filled with argon gas lost its insulating properties at the lowest pressure among the tested gases (2.00 × 10−1 Pa at contact gap d = 2 mm). After a decrease in electrical strength, an intense glow discharge was observed. A theoretical description related to the initiation of an electrical breakdown in vacuum insulating systems is also presented. The situation in which the discharge chamber with a contact system was filled with the mentioned gases was analyzed. The mean free paths of the electrons and molecules as well as the velocities and energies of the electrons accelerated by the voltage applied to electrodes were calculated. The obtained results were related to the measurement parameters and analyzed in terms of the discharge development. The results of the research suggest alternatives for the further development of vacuum-extinguishing chambers used in environmentally-friendly electrical switchgear by increasing the rated operating pressure, maintaining the required electrical strength values, and thus facilitating the operation due to greater certainty in regard tomaintaining the integrity of such a vacuum interrupter.

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Section: Initiation Of An Electrical Discharge In a Vacuum At Ac Voltagementioning

confidence: 99%

Breakdown Initiation and Electrical Strength of a Vacuum Insulating System in the Environment of Selected Noble Gases at AC Voltage

Lech¹,

Węgierek²

2022

Energies

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Experimental recurrence of an unreported fire risk of power cable: Discharge of bracket cable metallic grounding under coupled vibration conditions

Huang,

Liu,

et al. 2025

Electric Power Systems Research

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Memory effect and statistical characterization of pulsed vacuum microdischarge breakdowns between palladium electrodes from 500 nm up to 10μm

Mat’ašová,

Klas,

Čermák

et al. 2024

Vacuum

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Vacuum breakdown in microgaps between stainless-steel electrodes powered by direct-current and pulsed electric field

Cited by 7 publications

References 40 publications

Breakdown Initiation and Electrical Strength of a Vacuum Insulating System in the Environment of Selected Noble Gases at AC Voltage

Breakdown Initiation and Electrical Strength of a Vacuum Insulating System in the Environment of Selected Noble Gases at AC Voltage

Experimental recurrence of an unreported fire risk of power cable: Discharge of bracket cable metallic grounding under coupled vibration conditions

Memory effect and statistical characterization of pulsed vacuum microdischarge breakdowns between palladium electrodes from 500 nm up to 10μm

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