The artica Analyses the defects in traditional relay automatic reclosing, proposes application of PLC in the design automatic relcosing and draws a ladder chart. The design program not only met with the essential demand for automatic reclosing , but also applied count instruction of programmable controller—CNT,timer instructionTIM,realized the adjustment and automatic return of coincidence times and required time-delay for automatic reclosing .So, the design program is of generality and practical characteri...