Spiral-slot contacts produce an axial magnetic field (AMF) and the transverse magnetic field (TMF). The magnetic field between TMF contacts will affect the breaking performance of vacuum interrupters. In order to study the effect of TMF and AMF on arcing process and movement characteristics, five contacts with different TMF and AMF, but the same ratio of TMF to AMF, were designed and experimentally investigated in a demountable vacuum chamber. The arc movement phenomenon under different TMF and AMF was obtained. It was found that increasing TMF and AMF could reduce the arc jets to the outer electrode, and arc stagnation was more likely to occur in the later stage of the movement. The influence of TMF and AMF on arc movement characteristics and the utilization of contact surfaces was investigated. With the increase in TMF and AMF, the number of arc rotations increased, and the range of arc movement and the utilization of contact surface increased first and then decreased. Simulations were performed to analyze that the influence mechanism of TMF and AMF on arc movement characteristics was investigated. With the increase in TMF and AMF, the tangential force of the concentrated arc was increased, and the radial force was reduced.

中文翻译：

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TMF和AMF成分对螺旋槽接触中电弧运动特性的影响

螺旋槽触点会产生轴向磁场（AMF）和横向磁场（TMF）。TMF触点之间的磁场会影响真空灭弧室的分断性能。为了研究TMF和AMF对电弧放电过程和运动特性的影响，在可拆卸的真空室内设计并实验研究了五个具有不同TMF和AMF，但TMF与AMF比率相同的触点。得到了不同TMF和AMF下的电弧运动现象。已经发现，增加TMF和AMF可以减少向外部电极的电弧喷射，并且在运动的后期阶段更容易发生电弧停滞。研究了TMF和AMF对电弧运动特性和接触表面利用率的影响。随着TMF和AMF的增加，电弧旋转次数增加，电弧运动范围和接触面利用率先增加后减少。通过仿真分析，研究了TMF和AMF对电弧运动特性的影响机理。随着TMF和AMF的增加，集中电弧的切向力增大，径向力减小。