主电路接地是电力机车常见的故障之一。对于死接地故障,一般还比较容易检测、处理。但对于目前发生较多的活接地,也可以说是造成死接地或电气设备烧损的前期隐患,则不易查找。因为这一类故障是在机车负载运行中,主电路由于某点绝缘不良而对地瞬间放电造成的。常见的现象有牵引工况的高级位(负载)接地和电制动工况(负载)接地等。一般情况下,在库内进行高压试验或用摇表都不能检测出来,这往往给机车运用及检修带来不少麻烦。如何在库内静止状态下,迅速、准确地 Main circuit grounding is one of the common failures of electric locomotives. For dead ground fault, the general is still relatively easy to detect and deal with. However, for the current occurrence of more live ground, it can be said to cause dead ground or electrical equipment burned a pre-crisis, it is not easy to find. Because of this type of fault is running in locomotive load, the main circuit due to a point of poor insulation caused by the instantaneous discharge. Common phenomenon traction position of the advanced bit (load) and electrical braking conditions (load) grounding. Under normal circumstances, the high-pressure test in the library or shake table can not be detected, which often bring a lot of trouble locomotive operation and maintenance. How to quickly and accurately in the library at rest