矿山井下运输主要是直流牵引的电机车。机车的电源,一般均由交流经过整流通过滑触线供给的。矿山井下条件差,机车架线多而长,因此,常发生由架线或机车造成的直流电源过电流或短路。过去,故障一出现,整流装置能够跳电,但不能自动送电。在给电时,常常因为不知牵 Mine underground transport is mainly DC traction electric locomotive. Locomotive power supply, generally by the AC through rectification through the trolley line supply. Underground mine conditions are poor, locomotive line length and more, therefore, often occur by overhead lines or locomotive DC power supply overcurrent or short circuit. In the past, a fault occurred, the rectifier can jump, but can not automatically send electricity. In the power, often because I do not know pull