A scheme of optimal auto-reclosing is proposed in this paper. Single phase is tripped for single-phase-earth-fault, two phases are tripped for two-phase-earth-fault and either fault phase is tripped for two-phase unearth fault in the scheme. Further more, the switches reclose at optimal reclosing time by phase for instantaneous fault and shut down reclosure for permanent fault. The calculation result shows that the reclosing mode can avoid severe impact to the system caused by reclosing on permanent fault, ...