Transition from the anodic arc phase to the cathodic metallic arc phase in vacuum at low DC electrical level

Proceedings of the Forth-Seventh IEEE Holm Conference on Electrical Contacts (IEEE Cat. No.01CH37192) Pub Date : 2001-09-10 DOI:10.1109/HOLM.2001.953194

L. Morin, N. Ben Jemaa, D. Jeannot, H. Sone

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引用次数: 20

Abstract

Contact material transfer in relays has been described in several papers. Transfer from the anode to the cathode has been attributed to the anodic arc phase, and opposite transfer from the cathode to the anode has been attributed to the cathodic arc phase. In a previous paper, we showed that the transition from the anodic to the cathodic arc occurs when a breaking arc becomes longer than a critical arc length, independent of electrical and mechanical parameters. In this paper, we completed our work using the same breaking apparatus (14 VDC, 40 A) equipped with an arc length control device. We showed that the transition from the anodic to the cathodic arc occurs always at the same critical arc length independent of the opening speed and the ambient pressure. Through measurements of material transfer in vacuum, indications are that transfer direction is independent from metallic and gaseous phases, though further work is needed for full confirmation. Finally, we showed that it was possible to distinguish the transition from anodic to cathodic arc by observing the evolution of the arc spots on the rivets.

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在低直流电压下，真空中由阳极电弧相过渡到阴极金属电弧相

在几篇论文中已经描述了继电器中的触点材料转移。从阳极到阴极的转移归因于阳极弧相，而相反的从阴极到阳极的转移则归因于阴极弧相。在之前的一篇论文中，我们表明，当断弧长度超过临界弧长时，就会发生从阳极弧到阴极弧的转变，而这与电气和机械参数无关。在本文中，我们使用相同的分断装置(14 VDC, 40 A)，配备弧长控制装置完成了我们的工作。我们发现，从阳极电弧到阴极电弧的过渡总是发生在相同的临界弧长，而与打开速度和环境压力无关。通过对真空中物质转移的测量，表明转移方向与金属相和气相无关，但需要进一步的工作来充分证实。最后，我们表明，通过观察铆钉上电弧斑点的演变，可以区分从阳极电弧到阴极电弧的转变。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the Forth-Seventh IEEE Holm Conference on Electrical Contacts (IEEE Cat. No.01CH37192)

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