Generation and Developing Process of Low Voltage Series DC Arc

The dc arc is unintended, self-sustaining high energy plasma discharge, threatening the safety of low voltage dc power systems. In this paper, a dc arc generator was designed and images of the generation and developing process of dc arc are presented. The shape of the arc during different phases, the emitting sparks, and the burning copper electrode is shown in the images, which is described and explained from the physical process point of view.