Overhead Line Electric Locomotive

During the working process of the trolley type electric locomotive, after the high-voltage alternating current is depressurized and rectified by the traction substation, the positive pole is connected to the overhead line and the negative pole is connected to the rail. The pantograph on the locomotive contacts with the overhead line, introduces the current into the vehicle, and then enters the traction motor through the air automatic switch, controller and resistance box to drive the motor.

Advantages and disadvantages of stringing narrow gauge locomotive:

The electric locomotive of stringing type is that the current transmitted from the traction substation to the stringing enters the electric circuit and the electric locomotive of the electric locomotive through the current collector, and then returns to the substation through the track. In China, there are two kinds of DC voltage for underground power grid: 250V and 550V, and 550V and 750V for outdoor power grid.

Narrow gauge locomotive Advantages:
the trolley type electric locomotive has the advantages of simple structure, low cost, convenient maintenance, large transportation capacity, high speed, high power efficiency, low transportation cost and the most widely used.

Narrow gauge locomotive Disadvantages:
there must be rectifying and stringing facilities, which are not flexible enough; stringing has a certain impact on the size of the roadway and the safety of pedestrians; sparks are easily generated between the pantograph and stringing, which is not allowed to be used in mines with serious gas; the initial construction investment is large, but in the long run, the total cost of using stringing electric vehicles is much lower than that of battery electric vehicles. Therefore, if the mine conditions permit, the main transportation of the mine shall be the stringing electric locomotive.