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| Cracking reason analysis and rectification measures of FA5 operating mechanism in 3AP2—FI breaker |
| QIN Bingdong1, ZHANG Chen1, RUAN Yanjun1, ZHAO Weijie2 |
1. Guangzhou Bureau of CSG EHV Power Transmission Company, Guangzhou 510000;
2. Kunming Bureau of CSG EHV Power Transmission Company, Kunming 650000 |
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Abstract Circuit breaker is the key equipment of power transmission system. In the operation of power transmission system, circuit breaker has not only a high frequency and various types of faults, but also particularly complex faults causes. Analysis and corresponding improvement measures of circuit breaker faults are particularly important to the operation of DC system. The failure cause analysis and rectification strategy research on the shell cracking of the FA5 operating mechanism of a 500kV 3AP2—FI circuit breaker in a converter station are carried out. Based on the mechanical principle and disassembly inspection phenomenon analysis, it is concluded that the operating mechanism cracking is caused by excessive power of the energy storage motor. Aiming at the cause of failure, this paper proposes corresponding improvement measures, and the feasibility and effectiveness of the improvement measures is verified by tests.
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Received: 27 November 2020
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| Cite this article: |
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QIN Bingdong,ZHANG Chen,RUAN Yanjun等. Cracking reason analysis and rectification measures of FA5 operating mechanism in 3AP2—FI breaker[J]. Electrical Engineering, 2021, 22(7): 38-41.
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| URL: |
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http://dqjs.cesmedia.cn/EN/Y2021/V22/I7/38
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2021, Vol. 22 
