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| Differential Protection of Motor Unit in SM2 Action Analysis and Improvement Measures |
| Duan Qiang |
| Shanxi Province Wanjiazhai Yellow River Diversion Project Corporation, Taiyuan 030012 |
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Abstract On February 9, eight o'clock, for SM2 4# motor unit in the process of start, 6# motor unit differential protection act, 6# motor unit trip. After the test and analysis, proves that due to the connection mode is not reasonable, the three-phase sampling current neutral on both sides of protection not consistent, the outside fault lead to differential current protection beyond definite value, differential protection act,and motor unit trip.
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Published: 10 October 2013
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2013, Vol. 14 
