Research on Arc Re-strike Phenomenon and Cause During DC Contactor with Splitter Plates Breaking
To investigate the physical mechanism of arc re-strike during DC contactor breaking,a magnetohydrodynanmic(MHD)model is established considering the inhomogeneous magnetic field distribution,and two kinds of arc re-strike phenomena were found under different copper vapor concentrations,including arc re-strike between splitter plates and arc re-strike between contacts.Arc re-strike between contacts will increase the arc duration significantly,so it should be avoided in the practical applications.The arc re-strike is related to the airflow vortex in the extinguishing chamber and the difference of gas velocity between the dynamic and static contacts.This study can provide the theoretical guidance and the quantitative data reference for the design of DC contactor.
DC contactorsplitter platesarc re-strikecopper vapormagnetic field
万方数据
维普
