Reliability Design of Molded Case Circuit Breaker for Latch Skip Prevention

摘要：

　　By analyzing latch skip phenomenon occurred in double breakpoint molded case circuit breaker (MCCB), this essay has summarized main reasons for latch skip as follows: 1.Malfunction of the primary tripping mechanism;2.Insufficient overlap surface between the draw bar and the lock catch of the secondary tripping mechanism;3.Insufficient overlap surface between the jump pin and the lock catch of the third tripping mechanism.Through simulation analysis, main parts, including the jump pin, lock catch, draw bar, striker, indication bar, etc., are redesigned after optimization.It can be seen from the test results that latch skip failure rate is significantly decreased and operation reliability of the breakers is increased.

关键词： latch skip phenomenon tripping mechanism simulation analysis mechanical life

作者: Jin Cao Yipeng Yu Haoming Bu

作者单位: Shanghai Liangxin Electrical Co., Ltd Shanghai, 200137

会议类型: 国际会议

会议名称: The 5nd Intrenational Conference on Reliability of Electrical Products and Electrical Contacts(第五届电工产品可靠性与电接触国际会议)

会议地点: 温州

会议语种:英文

页码: 371-375

在线出版日期: 2014-11-16（万方平台首次上网日期，不代表论文的发表时间）