NDLI: High current vacuum arc phenomena of nanocrystalline CuCr25 contact material

Content Provider	IEEE Xplore Digital Library
Author	Li Yu Jianhua Wang Yingsan Geng Guowei Kong Zhiyuan Liu
Copyright Year	2010
Description	Author affiliation: State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, 710049, China (Li Yu; Jianhua Wang; Yingsan Geng; Guowei Kong; Zhiyuan Liu)
Abstract	Research on the vacuum arc phenomena of the nanocrystalline CuCr25 contact material is interested for its potential application on high current interruption. In order to investigate the vacuum arc phenomena of the nanocrystalline CuCr25 contact material, a traditional CuCr25 material was also prepared for comparison. 12mm and 25mm diameter contacts were assembled in vacuum interrupters, which have a glass envelope and no shield. A high-speed CCD camera was used to observe the anode phenomena and the cathode phenomena through the glass envelope. The test vacuum interrupters were operated by a permanent magnet mechanism. The average opening velocity can be adjusted to two velocities: 1.3m/s to 1.8 m/s. The arc current frequency was 50Hz and arc duration was 9ms∼10ms. The experimental results showed that at same current and average opening velocity, the arc energy and the mean value of arc voltage of nanocrystalline CuCr25 was lower than the traditional CuCr25 contact material. The distribution of cathode spots on the nanocrystalline CuCr25 contact was more uniformly than of the traditional CuCr25 contact. And the carrying current per cathode spot of the nanocrystalline contact material was about ⅓ of that of the traditional contact material. However, the anode phenomena of the nanocrystalline CuCr25 contact were more active than the traditional CuCr25 contact material when passing the same high currents. At a threshold current at the first high-current anode mode appeared, it was found that the threshold current of nanocrystalline CuCr25 contact material was lower than that of traditional CuCr25 contact material, which means the nanocrystalline CuCr25 contact material was more prone to appear the high-current anode mode than the traditional CuCr25 contact material.
Starting Page	229
Ending Page	232
File Size	902654
Page Count	4
File Format	PDF
ISBN	9781424483679
ISSN	10932941
e-ISBN	9781424483686
e-ISBN	9781424483662
DOI	10.1109/DEIV.2010.5625828
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-08-30
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Nanostructured materials Anodes Cathodes Vacuum arcs Interrupters
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Software

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High-Current Vacuum Arc Phenomena of Nanocrystalline CuCr25 Contact Material

High-current vacuum arc: The relationship between anode phenomena and the average opening velocity of vacuum interrupter

Investigation of arc roots of constricted high current vacuum arcs

Numerical simulation of multi-component arcs in high-current vacuum interrupters

Observation of an anode spot shell at the high-current vacuum arc

Arc modes of intermediate-frequency vacuum arc with axial magnetic field

Experimental Evaluation of the High-Current Drawn Arc Energy Balance

Arc erosion characteristics of nanocrystalline CuCr contact material

The motion of vacuum arcs between spiral contacts with a fixed-polarity arc shield [in vacuum interrupters]

High current vacuum arc phenomena of nanocrystalline CuCr25 contact material

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