On account of the weak fault current and unstable fault arc, the problems of the singlephasetogroundfault line selection in the non-solid earthed network have never been thoroughly resolved.
由于故障电流小、电弧不稳定等原因,小电流接地系统单相故障选线问题始终没有得到彻底解决。
2
Small Current Grounding Power System is widely used in power distribution network with middle and low voltage in china, and the singlephasetogroundfault takes place most frequently in such system.