The healthy line is unloaded for zero-sequence component when a single-phasefault occurs in a non-solid earthed network.
小电流接地系统发生单相接地故障时,对零序分量而言,非故障线路相当于空载。
2
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.