Cableway Trolley

Trolley cars on overhead lines are powered by the current supplied to the overhead line from the traction converter, which then enters the circuit and the motor of the trolley car, and returns to the converter through the track. In China, the direct current voltage for underground overhead power grids is either 250V or 550V, while for outdoor grids, it is either 550V or 750V.

1 Advantages: The overhead trolley motor has a simple structure, low cost, easy maintenance, high transportation capacity, high speed, high power consumption efficiency, low transportation costs, and wide application.

2. Drawbacks: Requires rectifying and wiring facilities, lacks flexibility; wiring may affect tunnel dimensions and pedestrian safety; arcing between the collector and wire can occur, making it unsuitable for use in mines with severe gas presence; initial construction investment is high, but over the long term, the total cost of using trolleybuses with wiring is significantly lower than that of battery-powered trolleybuses. Therefore, if the mine conditions permit, the main transportation in the mine should use trolleybuses with wiring.