solid earthed neutral 直接接地中性点
non-solid earthed distribution networks 中性点非直接接地电网
non-solid earthed power system 小电流接地系统
non-solid earthed power systems 小电流接地系统
The healthy line is unloaded for zero-sequence component when a single-phase fault occurs in a non-solid earthed network.
小电流接地系统发生单相接地故障时，对零序分量而言，非故障线路相当于空载。
On account of the weak fault current and unstable fault arc, the problems of the single phase to ground fault 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。
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