The single earth-fault in three phase network earthed neutral is called as single phase short circuit, and that in three phase network insulated to earth is called as leakage fault.

• 同样是三相电网的“单相接地”，发生于中性点直接接地系统称“单相短路”故障，而发生于中性点绝缘系统叫“接地漏电”故障。