It points out that even very small ground current could also produce very high overvoltage, and in network of small ground current the singte phase arc earthing is principally expressed as high frequency arc suppressing.

• 指出:即使很小的接地电流也会产生很大的过电压,而且在小接地电流电网中单相弧光接地主要表现为高频熄弧。