7-Ton Mining Trolley Electric Locomotive Trolley electric locomotive is a kind of rail transportation traction equipment, powered by transformers and overhead lines. Mainly used in mines where there is no risk of explosion. Because of its special power supply mode, the trolley electric locomotive has no limit on the cruising range. Therefore, it is suitable for long-term and long-distance use. There are also many options in terms of speed regulation and braking methods. Speed control methods include resistance speed control, chopping speed control and frequency conversion speed control. Braking methods include pure mechanical braking, hydraulic braking and compressed air braking. In addition, electric braking can also be selected as an auxiliary braking method. C: Locomotive for coal mining J: Trolley electric locomotives Y: Single-end driver's cab G: Steel wheel,resistor for speed control GB: Steel wheel,chopping wave for speed control Product Description Adhesive / total weight (t) : 7 ton Track gauge (mm) : 600,762 or 900 Traction (KN) : 13.05kN/ 15.09kN Max. Traction (KN) : 17.2kN Speed(km/h) : 11km/h Voltage : 250V or 550V Power (KW) : 21kw *2 or 24 kw*2 Dimensions Length(mm) : 4550mm Width(mm) : 1050,1212 or 1350mm Height(mm) : 1550mm Wheelbase (mm) : 1600 mm Min Curve radius (m) : 7 m Wheel diameter (mm) : 680mm Controller : Resistance or IGBT or AC controller Braking method : Mechanical or air Brake