Minimization of arc extinction gap in the opening speed range 1 cm/s - 1 m/s

D. Sallais, N. Ben Jemaa, E. Carvou
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引用次数: 20

Abstract

Speed separation in switches and relays is a fundamental parameter to improve breaking devices performances by reducing extinction gap and arc duration. It is commonly admitted, that with resistive load, high speed separation produces lower arc duration and keeps constant extinction gap, whereas with inductive load, the extinction gap is enlarged. The objective of this paper is to minimize the gap in a wide opening speed range (from 1 cm/s to 1 m/s) covering the main application of breaking and disconnecting devices. The results reveal a minimum arc extinction gap that occurred at an opening speed close to a few cm/s. Contrary to the common idea, this new result shows that high separation speeds are not always required to minimize the gap. In addition, this minimum gap value is highly affected by load and current, while contact materials seem to have a minor action. Based on arc shape and plasma examination, some attempts are made to explain this gap contraction.
在开启速度范围1厘米/秒- 1米/秒内消弧间隙最小
开关和继电器中的速度分离是通过减小消光间隙和电弧持续时间来提高开断装置性能的基本参数。一般认为,在电阻负载下,高速分离弧弧持续时间较短,消光间隙保持恒定,而在电感负载下,消光间隙增大。本文的目标是在一个宽的开断速度范围内(从1厘米/秒到1米/秒)最大限度地减少间隙,涵盖了分断和断开装置的主要应用。结果表明,在打开速度接近几厘米/秒时,出现了最小的消弧间隙。与通常的想法相反,这个新的结果表明,并不总是需要高的分离速度来最小化间隙。此外,这个最小间隙值受负载和电流的影响很大,而触点材料的作用似乎很小。基于电弧形状和等离子体检测,对这种间隙收缩作了一些解释。
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