DF7G Diesel Shunting Locomotive

DF7G AC-DC electric transmission diesel shunting locomotive is mainly used for marshalling and shunting operations in large and medium sized marshalling yards. It is equipped with 12V240ZJ diesel engine, its main components are interchangeable with the ones of DF4 and DF5, and its components are most suitable for DF4. Based on DF5, improvements on generalization, serialization, modularization, standardization have been made. It adopts modular construction of outside corridor and underframe load-bearing, diesel engine with stepless speed adjusting gear; The main transmission system adopts two excitation systems of PLC constant power excitation and original excitation of power adjustable resistance.

The auxiliary system of the locomotive adopts auxiliary electrical transmission, the cooling fan and air blower of traction motor driven by AC motor. The control system adopts color liquid crystal display, with the functions of data display, fault diagnosis, detection and records, etc.