电力机车牵引回路和辅助回路的电器均采用二次控制,使得控制回路的联锁触点多达数百个。这许多触点中只要有一个接触不良,或在工作中出现瞬间跳动,就会影响电力机车的正常运行。触点如此之多,要迅速而且准确地检查和判断出故障触点是极为困难的。有的即使经过多次试运,却仍然找不出来。这不仅降低了检修效率,而且因为机车带病上阵,给安全运输带来威胁。针对此问题,我们根据检修工作中积累起的实践经验,采 Electric locomotive traction circuit and secondary circuit electrical appliances are used secondary control, making the control circuit interlocking contacts up to hundreds. As many as one of these contacts poor contact, or appear in the work of an instant beating, it will affect the normal operation of electric locomotives. With so many contacts, it is extremely difficult to quickly and accurately check and determine the faulty contacts. Some even after many trials, but still can not find it. This not only reduces maintenance efficiency, but also poses a threat to safe transportation because locomotives get sick. In response to this problem, we based on the maintenance work accumulated experience, mining