Interruption Phenomenon in Intermediate-Frequency Vacuum Arc

JIANG Yuan (蒋原); WU Jianwen (武建文)

doi:10.1088/1009-0630/18/3/16

Plasma Science and Technology > 2016 > 18(3): 311-318. > DOI: 10.1088/1009-0630/18/3/16

JIANG Yuan (蒋原), WU Jianwen (武建文). Interruption Phenomenon in Intermediate-Frequency Vacuum Arc[J]. Plasma Science and Technology, 2016, 18(3): 311-318. DOI: 10.1088/1009-0630/18/3/16

Citation:

JIANG Yuan (蒋原), WU Jianwen (武建文). Interruption Phenomenon in Intermediate-Frequency Vacuum Arc[J]. Plasma Science and Technology, 2016, 18(3): 311-318. DOI: 10.1088/1009-0630/18/3/16

Citation:

JIANG Yuan (蒋原), WU Jianwen (武建文). Interruption Phenomenon in Intermediate-Frequency Vacuum Arc[J]. Plasma Science and Technology, 2016, 18(3): 311-318. DOI: 10.1088/1009-0630/18/3/16

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Interruption Phenomenon in Intermediate-Frequency Vacuum Arc

School of Automation Science and Electrical, Beihang University, Beijing 100191, China

Funds: supported by National Natural Science Foundation of China (No. 51377007), Specialized Research Fund for the Doctoral Program of Higher Education of China (No. 20131102130006), and Fundamental Research Funds for the Central Universities of China

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Received Date: September 08, 2015

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Abstract

Abstract

In the condition of the 3 mm gap, experiments for 360 Hz intermediate-frequency vacuum arc are carried out in interrupters with the diameters being 41 mm and with the contact materials being CuCr50 and Cu-W-WC alloy respectively. The results indicate that the contacts material is closely related to the breaking capacity of the vacuum interrupters and characteristics of an intermediate-frequency vacuum arc. For contacts with the same diameter, the breaking capacity of CuCr50 is better than that of Cu-W-WC. When the current fails to be interrupted, the arcs overflow the gap and present irregular performances in the first half wave. Consequently a voltage spike appears. More macroscopic metal droplets can be seen in the arc column between CuCr50 contacts because of the lower melting point. It is observed that the droplet emission is much more severe during arc reignition than that in the first half wave. It is much more conspicuous that the high frequency arc voltage noises appear in Cu-W-WC contacts when the vacuum arcs reignite, for higher temperature and stronger electronic emission ability of Cu-W-WC contacts.
- intermediate-frequency vacuum arc,
- axial magnetic field (AMF),
- arc voltage,
- arc reignition,
- droplet emission

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References

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