东风４型内燃机车主电路接地性质的判别向塘机务段（向塘３３０２０１）黄崇淼１引言我段现配有东风４内燃机车８８台。１９９４年机车主电路发生故障１２７起，其中接地类故障４４起，占主电路故障的３５％，且主电路接地故障９９％属牵引电机故障。目前，机车上的接地保... Dongfeng 4 diesel locomotive main circuit grounding nature of the Xiangtang locomotive section (Xiang Tong 330201) Huang Chongmiao 1 Introduction I paragraph is equipped with Dongfeng 4 diesel locomotives 88 units. In 1994, there were 127 faults in the main circuit of the locomotive, among which 44 earth faults occurred, accounting for 35% of the main fault, and 99% of the main earth faults were caused by traction motor faults. At present, the grounding on the locomotive ...