Abstract Research purposes: When the power line with permanent fault ，not only the automatic reclosing of the feeder circuit breaker will fail ，but also will bring a greater current impact to the high － voltage equipment of substation and shorten the service life of these devices．
Research conclusions: Traction substation feeder fault judge equipment can measure and judge the fault types (permanent failure or transient failure) automaticlly． According to measurements of selective blocking on the auto － recloser automatics ，avoid the blindness of the automatic reclosing action when the catenary with permanent fault．
Wang Hanbing． Problems and Solutions of the Auto － recloser Automatics in Traction Substation［J］．Electrfied Railway，2011(2):26 － 28．
［6］ 陈昱． DW 系列断路器的自动重合闸设计［J］． 铁道机车车辆，2004(5):68 －71．v Chen Yu ． Automatic Reclosing System Design for the DW Series Circuit Breaker［J］． Railway Rolling Stock ，2004(5):68 － 71．
2012, Vol. 29 
