分析了采用小电阻接地系统的必要性及该系统的故障特性。
The necessity of low resistance ground system and its fault characteristic were analyzed.
直流系统环网是接地故障检测中的一个关键因素。
Loop net of DC system is an important factor in the grounding fault detection.
单相接地故障仍是矿山电网的主要事故形式。
Single-phase grounded failure is still the main reason of mine power-net fault.
该判据对接地故障具有很高的选择性能。
This action criterion shows that it is highly selective to the ground fault.
具有高可靠的异向接地故障电流开断能力；
With high & reliable ground fault current breaking capacity;
具有高可靠的异向接地故障电流开断能力；
With high & reliable ground fault current breaking capacity;
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