不同磁场方式下真空开关电弧电压特性及其直流开断性能研究OA

In this paper the arc voltage characteristics and DC performance of vacuum arcs under different magnet-ic field configurations are researched,and the influence patterns of various magnetic field configurations on the DC interruption capability and arc voltage evolution during arcing process are obtained.The DC interruption perfor-mance of vacuum arcs under different magnetic filed configurations is experimentally investigated.The results show that the falt-type contact subjected to a pulse transverse magnetic field exhibits the strongest DC interruption capa-bility,achieving a maximum interruption capacity of 900 V/900 A.Under the action of a pulsating transverse mag-netic field,the flat contact configuration successfully achieves DC interruption at 400 V/400 A.In contrast,DC in-terruption capability of both the axial magnetic field contac and the spiral-groove contacts exhibit weak inferior DC interruption capabilities and are unable to interrupt DC current.The variation of arc voltage during vacuum arc in-terruption under diverse magnetic field configurations are compared and analyzed.The result shows that the arc volt-age during DC vacuum interruption under transverse magnetic field presents severe instability and is prone to in-tense oscillations.Violent oscillations occur in the arc voltage of transverse magnetic field contacts throughout the arcing period.In particular,for flat contacts with externally applied transverse magnetic field under a current of 8 kA,the peak oscillation amplitude of arc voltage reaches up to 250 V.