HXD3 series locomotive auxiliary engine state monitoring system

An HXD3 series locomotive auxiliary engine state monitoring system comprises a shell and a display screen attached to the front face of the shell. A monitoring module for monitoring the change of the power supply current of each auxiliary machine is arranged in the shell; and the monitoring module transmits the value of the change of the power supply current of each auxiliary machine to the display screen. Once the auxiliary machine is grounded in the operation process of the locomotive, a driver can observe the change of the supply current of the auxiliary machine through the display screen in time, and the corresponding faulty auxiliary machine can be cut off in time, maintenance and repair can be performed in time and the operation state of the locomotive can be quickly recovered through the overlarge supply current. Meanwhile, the system also can detect the leakage current of the circuit through the too small power supply current of the auxiliary machines, and timely eliminates the leakage current fault o