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《Electric Engineering》 2018-15
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Analysis and Research on the Closing Buffer Failure of a High-voltage Circuit Breaker

WU Bin;AN Jing;PENG Chenguang;HUANG Fengpu;State Grid Zhejiang Electric Power Co.,Ltd.,Maintenance Branch;  
In view of the closing buffer roller broken of a 500 kV circuit breaker,the entire closing process is analyzed in this paper,from energy storage of the circuit breaker to the completion of closing command,finally to the release of the remaining kinetic energy.It is clear that the main cause of the closing buffer roller broken is the over-sized overshoot angle of the spring energy storage clutch device,and manually pressing the contactor of energy storage motor for energy storage is the most fundamental cause of over-sized overshoot angle of the energy storage clutch.During the subsequent maintenance process,manually pressing the energy storage motor contactor for energy storage is strictly prohibited,and the overshoot angle inspection of the energy storage clutch device is also added.
【CateGory Index】: TM561
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