Interruption Phenomenon in Intermediate-Frequency Vacuum Arc
Interruption Phenomenon in Intermediate-Frequency Vacuum Arc
复制标题
中频真空电弧的断路现象
DOI：
10.1088/1009-0630/18/3/16
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发表时间：
2016
影响因子：
1.7
通讯作者：
Wu Jianwen
中科院分区：
文献类型：
--
作者：
Jiang Yuan;Wu Jianwen
在间隙为3 mm的条件下，对直径为41 mm、触头材料分别为CuCr 50和Cu-W-WC合金的灭弧室进行了360 Hz中频真空电弧试验。结果表明，触头材料与真空灭弧室开断能力和中频真空电弧特性密切相关。对于相同直径的触头，CuCr 50的分断能力优于Cu-W-WC。当电流未能被切断时，电弧溢出差距，在前半波呈现不规则的行为。因此，出现电压尖峰。由于熔点较低，在CuCr 50触头之间的弧柱中可以看到更多的宏观金属液滴。结果表明，在电弧重燃过程中，熔滴的发射比前半波严重得多。由于Cu-W-WC触头温度较高，电子发射能力较强，真空电弧重燃时，高频电弧电压噪声更为明显。
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.