Of neutral leads of the wires, called the neutral line;

由中性点引出的导线，称为中性线；

So, it is significant to prevent the occurrence of faulted neutral line within the circuit of three phase and four line system.

因此，防止三相四线制配电回路断零事故的发生，具有更广泛的意义。

The paper analyses the causes of overload of neutral line and great errors of measuring instrument by harmonics electrical line .

对电气回路中因谐波造成的电力线路中性线过载和测量仪表出现较大误差的原因进行了分析，探讨了抑制谐波的措施。

This conclusion is incomplete. We should consider the harm of faulted neutral line caused by unbalanced load.

必须考虑到三相不平衡负载状态下的零线断路同样可以造成这种危害。