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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2007, Vol. 8 Issue (3 ): 24-    DOI: 10.1631/jzus.2007.A0475
    
Reliability testing and reliability analysis of the over-load protective relay
ZHAO Jing-ying, CHEN Hong-jian, LIU Guo-jin, ZHANG Yong, WU Pin-hua
Postdoctoral Research Work Station, Delixi Group Co., Ltd, Wenzhou 325604, China; Electrical Apparatus Institute, Hebei University of Technology, Tianjin 300130, China
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Abstract  The over-load protective relay is widely used for motor protection. The reliability of the over-load protective relay directly affects the safe running of a motor. The reliability testing and reliability analysis of the over-load protective relay is an important way to improve the reliability of products. In this paper, the reliability test method of the over-load protective relay is studied, and the reliability tests of the typical products are carried out on a reliability tester developed by authors. In terms of the testing results, the reliability analysis is finished. The failure reasons are found and the measures are put forward to improve the reliability of the products.

Key words： Over-load protective relay      Protective success ratio      Sampling and checking plan      Reliability testing      Reliability analysis     
Received: 19 December 2006     
CLC:  TB114.3  
  O224  
  O211.6  
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ZHAO Jing-ying
CHEN Hong-jian
LIU Guo-jin
ZHANG Yong
WU Pin-hua
Cite this article:

ZHAO Jing-ying, CHEN Hong-jian, LIU Guo-jin, ZHANG Yong, WU Pin-hua. Reliability testing and reliability analysis of the over-load protective relay. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(3 ): 24-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2007.A0475     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2007/V8/I3 /24

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