Abstract
The defect types of 10kV VS1 circuit breaker were surveyed in order to reduce the defective ratio. Then, the main reason of these defects was found that the opening time of circuit breaker was too long. The reasons that cause circuit breaker opening time exceed were studied, and the effective reconstruction measures were developed though test verification and analysis. To compare with the statistics before reconstruction, the result shows that the reconstruction methods using in this paper were simple and easy to perform, which can reduce the opening time of circuit breaker, improve the reliability of the devices, and play a positive role in the security and stabilization of power system. It provides a basis for improving the efficiency of characteristics test at other voltage levels.
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