Dielectric strength of double and single-break vacuum interrupters: experiments with real HV demonstration bottles

Giere, S.; Karner, H.C.; Knobloch, H.

doi:10.1109/94.910424

Cited by 69 publications

(13 citation statements)

References 4 publications

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“…This unstable appearance has also been observedby [5], [7].Forthebipolarcontactsystem,aconstrictionwas notobservedtothisextent.Thespreadingofthearc,sometimesaccompanied by voltage fluctuations, lasts for approximately 2 ms. For the quadrupolar system, the transition time from initiation to the full coverage of the electrodes needs up to 3 ms with no sign of an arc voltage increase.…”

Section: Discussionmentioning

confidence: 68%

Optical investigations of dynamic vacuum arc mode changes with different axial magnetic field contacts

Shang

Dullni

Fink

et al. 2003

IEEE Trans. Plasma Sci.

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By using a high-speed charge-coupled device (CCD) video technique, three different axial magnetic field contact systems (i.e., unipolar, bipolar, and quadrupolar systems) are investigated at an arc current of 10 kA. Video recordings were compared to computer simulations of light emission emitted at the side-on of diffuse and diffuse columnar arcs. The computer images reproduced typical trends, such as stronger light intensities in front of the cathode caused by higher-plasma densities in this region.A low-current dc vacuum arc was initiated by contact separation before the high current was injected at a fixed contact distance of 10 mm. Videos were taken from two directions perpendicular to each other to localize the vacuum arc properly. From these investigations, the transient development of vacuum arc under different axial magnetic field profiles can be visualized. The results were interpreted with respect to the behavior of the vacuum arc in the second half cycle after an eventual reignition. Index Terms-Axial magnetic field (AMF) contacts, high-speed charge-coupled device (CCD) video, magnetohydrodynamics (MHD), reignition, vacuum arc modes, vacuum interrupters.

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Section: Discussionmentioning

confidence: 68%

Optical investigations of dynamic vacuum arc mode changes with different axial magnetic field contacts

Shang

Dullni

Fink

et al. 2003

IEEE Trans. Plasma Sci.

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“…The series arrangement allows reaching high rated voltages with standard medium voltage interrupters and to have low dielectric breakdown, NSDD and restrike probability [7,8]. Capacitive switching tests suggest that the margin of double break vacuum circuit breakers for capacitive switching is well superior to a single break solution.…”

Section: Two Vacuum Interrupers In Seriesmentioning

confidence: 99%

Vacuum interrupters in high voltage applications

Godechot¹,

Schlaug²,

Ernst³

et al. 2008

2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum

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SF 6 circuit breakers are the key technology in high voltage (HV) circuit breakers due to the excellent properties of SF 6 in arc extinction and insulation. Since a few years vacuum is starting to enter in this market for the lower high voltages ratings of 72,5kV and 84kV. The main driver for this evolution is the growing market demand for SF 6 free switchgear mainly for environmental reasons. The use of vacuum interrupters for high voltage applications nevertheless asks for new solutions to achieve the dielectric withstand and capacitive switching performances at voltage levels of 72,5kV and above. In this paper the results on three different solution approaches for the application of vacuum interrupters for high voltage applications will be discussed. The advantages and disadvantages of a single break high voltage vacuum interrupter for 72,5kV / 31,5kA will be compared to a solution using two standard medium voltage 36kV vacuum interrupters in series arrangement. Results on breaking tests and capacitive switching tests will be shown. The opportunities with hybrid circuit breakers using a vacuum and gas breaking chamber in series are discussed.XXIII-rd Int. Symp. on Discharges and Electrical Insulation in Vacuum -Bucharest -2008 978-1-4244-2841-0/08/$25.00

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“…This indicates a direction to keep the advantages of short-gap vacuum interrupters by means of using VCB with double or multiple breaks [1]. This technology has become realistic in many countries now [2][3][4].…”

Section: Introductionmentioning

confidence: 98%

Dielectric strength and statistical property of single and triple-break vacuum interrupters in series

Liao

Duan

Zou

et al. 2007

IEEE Trans. Dielect. Electr. Insul.

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The maximum possible improvement factor of vacuum circuit breaker (VCB) with multiple breaks compared with one-break, which had the same total gap length, was deduced. Based on the research on the breakdown weak points in high voltage vacuum gaps, a theoretic model was set up for describing the statistical property of multi-break VCB. Dielectric experiments were carried out on a commercial vacuum interrupter arrangements with single break or triple breaks in series under lightning impulse voltage. It shows that the more numbers in series are, the higher the breakdown voltage improvement factor is. The statistical results show that the triple-break vacuum interrupters in series have lower breakdown probability compared with a single-break one. It can be demonstrated in a preliminary study that the experimental results confirm the previous theoretical studies.Index Terms -Breakdown voltage improvement factor, breakdown statistical property, electrode stress, breakdown weak points.Zou ji-yan was born in Liaoning province, China, in 1954. He received the Ph.D. degree in electrical engineering from the Xi'an Jiaotong University. He is currently a professor at Dalian University of Technology, China. He has been engaged in the study of vacuum circuit breakers.

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Dielectric strength of double and single-break vacuum interrupters: experiments with real HV demonstration bottles

Cited by 69 publications

References 4 publications

Optical investigations of dynamic vacuum arc mode changes with different axial magnetic field contacts

Optical investigations of dynamic vacuum arc mode changes with different axial magnetic field contacts

Vacuum interrupters in high voltage applications

Dielectric strength and statistical property of single and triple-break vacuum interrupters in series

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