Reliability analysis and failure prediction study of dynamic contact resistance on contact

In previous research, a new testing instrument for dynamic contact resistance of a low capacity contact was developed, and, by means of this testing instrument, we carried out a series of experiments. In the experiments, we tested several types of industrial control relays under different environmental conditions, and accumulated experimental data. In this paper, our further research mainly focuses on the dynamic changing principle of dynamic contact resistances on the contact while contact time and operation times increase. Several characteristic values are distilled in the experimental data. We analyze these characteristic values using a statistical method of time sequences and draw some statistical conclusions. According to these conclusions, the reliability analysis and failure prediction method are further discussed.