Properties of intermediate-frequency vacuum arc in sinusoidal curved contact and butt contact

Ziang TONG (佟子昂); Jianwen WU (武建文); Wei JIN (金巍); Jun CHEN (陈均)

doi:10.1088/2058-6272/ab5b19

Plasma Science and Technology > 2020 > 22(2): 24004-024004. > DOI: 10.1088/2058-6272/ab5b19

Ziang TONG (佟子昂), Jianwen WU (武建文), Wei JIN (金巍), Jun CHEN (陈均). Properties of intermediate-frequency vacuum arc in sinusoidal curved contact and butt contact[J]. Plasma Science and Technology, 2020, 22(2): 24004-024004. DOI: 10.1088/2058-6272/ab5b19

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Properties of intermediate-frequency vacuum arc in sinusoidal curved contact and butt contact

1 School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, People's Republic of China
2 Guizhou Tianyi Electrical Co., Ltd., Zunyi 563002, People's Republic of China

Funds: This work is supported by National Natural Science Foundation of China (Nos. 51677002 and 51937004), Civil Aircraft Special Research and Technology Research Project (MJ-2017-S-46), State Key Laboratory of Reliability and Intelligence of Electrical Equipment (No. EERIKF004), Hebei University of Technology and selected from the 1st International Symposium on Insulation and Discharge Computation for Power Equipment.

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Received Date: August 21, 2019
Revised Date: November 21, 2019
Accepted Date: November 24, 2019

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Abstract

In this report, two new contact structures of a vacuum interrupter with a sinusoidal curved surface are proposed to improve the capability by increasing the surface area. The experimental investigation of vacuum arc at intermediate frequency (360–800 Hz) was conducted and the results were compared with a butt contact with the same contact diameter (41 mm) and the same material. By analyzing the arc behavior, arc voltage characteristics, arc energy, current interrupting capacity, ablation of the anode contact and condensation of the arc products at a 3 mm gap, the differences in their vacuum arc characteristics were determined. The correlations of their arc energy with the amplitude and the frequency of the current were also achieved. Analysis suggests that the ruled curved contact has strong application potentiality because of its low arc energy, low arc voltage noise and arc voltage peak, light ablation on the surface of the anode contact and high interrupting capacity.
- sinusoidal curved surface,
- intermediate frequency,
- voltage characteristics,
- arc energy,
- vacuum arc properties,
- arc behavior

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