High current vacuum arc phenomena of nanocrystalline CuCr25 contact material
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- High current vacuum arc phenomena of nanocrystalline CuCr25 contact material
- 发表刊物：
- IEEE TRANSACTIONS ON PLASMA SCIENCE
- 摘要：
- Abstract—Copper–chromium contact material is widely used in
vacuum interrupters. In recent years, the nanocrystalline CuCr
contact material has presented some excellent performances in
high withstand voltage, low chopping current, and so on. Therefore,
it has a big potential for high-current interruption with vacuum
interrupters. The objective of this paper is to investigate the
high-current vacuum arc phenomena of a nanocrystalline CuCr25
(Cr 25 wt%) contact material. Vacuum interrupters with 12- and
25-mm-diameter butt-type contacts were used in the tests. The
vacuum interrupters were designed in a glass envelope without
main shield for vacuum arc observation by a high-speed chargecoupled
device camera. The test vacuum interrupters were operated
by a permanent-magnet mechanism. The opening velocities
were 1.1 and 2.0 m/s, respectively. The arc current frequency was
50 Hz, and the arcing time was nearly 10 ms. For comparison, vacuum
interrupters with microcrystalline CuCr25 contact material
were also prepared. The experimental results showed that both the
arc energy and the mean value of the arc voltage of the nanocrystalline
CuCr25 contact material were lower than those of the
microcrystalline one under the same experimental conditions. The
carrying current per cathode spot of the nanocrystalline contact
material (about 34 ± 10 A) is about one-third of that of the microcrystalline
one (about 107 ± 30 A). However, the diameters of the
anode spots of the nanocrystalline CuCr25 contact material were
significantly larger than those of the microcrystalline CuCr25
contact material under the same conditions. Moreover, the durations
of the anode spots of the nanocrystalline CuCr25 contact
material were longer than those of the microcrystalline one.
- 合写作者：
- Yu,Wang,Geng,Kong, Liu
- 卷号：
- VOL. 39, NO. 6
- 页面范围：
- p1418-1426
- 是否译文：
- 否
- 发表时间：
- 2011-06-01