Experiment research on re-strike phenomenon occurring during high-voltage direct-current breaking process under transverse magnetic field

In high-voltage direct-current relays, transverse magnetic field is widely used to reduce the arc erosion. Experiments showed that re-strike phenomenon always occurred during the arc-blowing process, which increased the arc duration and affected the normal breaking operation. In this paper, the arc-blowing process is investigated for 300~800V, 50A resistive load and special attentions are paid on re-strike phenomenon. The re-strike type, re-strike voltage and re-strike probability under different voltages are studied with the help of the arc images and arc voltage waveforms.