Improvement on “fail-to-break” problem of type  ZN12-35/1250 circuit breaker

Huadian Technology ›› 2008, Vol. 30 ›› Issue (3): 55-58.

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Improvement on “fail-to-break” problem of type ZN12-35/1250 circuit breaker

TANG Xiang-zhou1 ，LI Xiao-li2

1.Huadian Qingzhen Power Corporation Limited, Qingzhen 551418, China; 2.Huadian Dafang Power Corporation Limited, Dafang 551600, China

Received:1900-01-01 Revised:1900-01-01 Published:2008-03-25

Abstract

Abstract: Through searching and analyzing the fail-to-break problem of type ZN12-35/1250 circuit breaker in operation after commissioning, some defects in unreasonable design and manufacture were fond out, the improved scheme was proposed. After welding a 50×5 channel steel on the breaker backplane as the fixing plate of breaking spring, moving the fixed end of breaking spring outward, making the angle between breaking spring and transmission crank less then 180°, until now the breaker has worked well for 9 years.

Key words: vacuum circuit breaker, fail-to-break, improve, method

TANG Xiang-zhou;LI Xiao-li. Improvement on “fail-to-break” problem of type ZN12-35/1250 circuit breaker [J]. Huadian Technology, 2008, 30(3): 55-58.

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Improvement on “fail-to-break” problem of type ZN12-35/1250 circuit breaker

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