ZQDR—410型牵引电动机因C_2联线裂断造成落修的故障很多。我段1985年全年落修43台,因C_2联线裂断造成落修就有10台;1986年1～6月落修20台,因C_2联线裂断就有5台。有时C_2联线在磁场削弱工况下裂断,使磁场削弱电阻通过很大电流,产生高热,造成高压室着火。 (一) C_2硬联线断裂的原因分析 ZQDR-410-type traction motor due to C_2 line break caused a lot of failures. In the whole paragraph of 1985, I repaired 43 units, of which 10 units were dropped due to the C_2 connecting crack; from January to June 1986, 20 units were dropped and 5 units were cracked due to the C_2 connecting line. Sometimes C_2 line breaks under the weakening of the magnetic field conditions, the magnetic field weakening resistor through a large current, resulting in high fever, resulting in high pressure chamber fire. (A) C_2 hard line fracture reason analysis