二氧化硫环境下断路器接线端电接触可靠性的研究  

Research on reliability of electrical contact for circuit breaker terminals in the environment containing SO_2

作　　者：王丽丽[1] 陆俭国[1] 王景芹[1] 

机构地区：[1]河北工业大学电器研究所,天津300130

出　　处：《河北工业大学学报》2014年第1期4-7,共4页Journal of Hebei University of Technology

基　　金：河北省杰出青年科学基金(E2009001584)

摘　　要：导致电连接发生电接触故障的主要原因是大气环境腐蚀.以断路器的接线端为研究对象,在相同腐蚀时间不同二氧化硫浓度和相同二氧化硫浓度不同腐蚀时间的试验条件下,对机械栓接的接线端子进行加速腐蚀试验;通过研制的电接触性能测试设备测量接线端子的接触电阻,研究腐蚀环境中接线端子的电接触可靠性.结果表明,使用螺栓连接的接线端的接触电阻值随腐蚀时间的延长变化相对很小,只有初始值的5%,螺栓连接处仍保持低电阻,未引起接线端电接触性能的变化.Environmental corrosion is one of the major causes of electrical contact failure of terminals. Reliability of electrical contact for mechanically bolted terminals is researched by conducting accelerated corrosion test under the dif- ferent conditions, which the same corrosion time corresponding to different concentrations of SO2 and the same concen- tration of SO2 at the different corrosion time. The circuit breaker terminal is as the research object in the paper, and the contact resistance of terminals is measured to study the reliability of electrical contact during research by developed testing device of electrical contact performance. The result shows that the value of contact resistance ofbolted terminals are changed by only 5% in the accelerated corrosion test, and the joints maintain low resistance and could not affect the performance of the terminals.

关 键 词：接线端子 二氧化硫 加速腐蚀 接触电阻 电接触可靠性 

分 类 号：TM561[电气工程—电器]