The shortage of traditional single-phase ground fault protection principle is pointed out.
指出传统的接地保护原理的不足。
The signal injection method is widely used for automatic selecting fault line in indirectly earthed power system, which has great effect in the system of single-phase ground fault.
注入信号法是一种效果较好的选线方法，其原理广泛应用于小电流接地系统单相接地故障的自动选线。
Can reliably determine, within the community and bounds detection ma level and zero-sequence current phase short circuit fault current, automatic removal of single-phase ground fault and phase fault.
能可靠判断、检测界内与界外毫安级零序电流及相间短路故障电流，实现自动切除单相接地故障和相间短路故障。
The attenuation formulae of HF bridge circuit with phase-ground coupling and adjacent phase impact or not are derived in this paper.
本文导出了不考虑邻相影响和考虑相邻影响条件下的相地耦合高频桥路衰减公式。
The attenuation formulae of HF bridge circuit with phase-ground coupling and adjacent phase impact or not are derived in this paper.
本文导出了不考虑邻相影响和考虑相邻影响条件下的相地耦合高频桥路衰减公式。
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