The characteristics of ground-fault of ungroundedsystem are given and the faults symptom is analyzed and judged.
阐述了小电流接地系统接地的特点并对其故障现象进行分析、判断。
2
Compared with neutral ungrounded power system, ferroresonance overvoltage occurred in neutral grounded power system has more new features, and the research about it is much.
In ungrounded distribution system the single-phase-grounding and the ferro-resonance caused by the PT (Potential Transformer) are of the frequent accidents.