触头分合过程中的短时熔焊现象

The Short-Time Welding Phenomena during the Contact Breaking/Making Operations

通过对触头分合过程的电流/电压波形的分析,可以及时发现分断过程中出现的触点短时熔焊现象,有利于综合判断触头的工作可靠性和剩余寿命。且随操作次数的增加,短时熔焊现象的出现具有随机性和突发性,短时熔焊现象出现之前的分断燃弧时间基本保持不变。

Using the diagnosis technique of electrical contact life with the waveform of making and breaking current and voltage, it is easy to observe the short-time welding phenomena during the contact breaking operations. And this is available for the synthetical diagnosis on the reliability and the residual electrical life of the contact. The breaking current duration changes randomly with the increase of operation and the short-time welding may occur suddenly or randomly without previous cumulated increase of arc duration.