From the analysis,it can be found that improper L and R will led to overlarge grounding residual current and voltage in the arc-suppression process,being not helpful.

• 由分析过程可以得出,电感值和电阻值的大小选择不合适,将会在灭弧过程中产生过大的接地残流或后期过高的过电压水平,不利于电弧的快速熄灭。