741.7741.7

Diesel locomotive class 741.7 is intended for shunting and line service. The locomotive is equipped with alternating/direct current power transmission (AC/DC) from the diesel engine to four powered wheelsets. Parameters of the vehicle are optimized for station
shunting and for heavy operation on industrial sidings, e.g. in metallurgical, mining and petrochemical sectors with the possibility to perform line service.

Parameters

Track gauge 1 435 mm
Meets the standards EN
Number of powered axles 4
Wheelset arrangement B'o B'o
Maximum operating speed 100 km/h
Minimum curve radius 80 (60) m
Line category B1
Lateral compatibility 1
Power transmission electric AC/DC
Diesel engine CAT 3508 C
EU Stage IIIA
Engine output 1000 kW
Maximum towing capacity 222 kN
Nominal weight 72 t
Axle load 18 t
Compressor output 186 m3
Fuel tank volume 4000 l
Climate class -25 to +40 ºC

Advantages and Benefits

  • high reliability
  • low operating and maintenance costs
  • environmentally friendly operation
  • modern concept and design
  • application of unified solutions
  • high comfort and operator safety
  • excellent visibility
  • spacious and safe platforms for shunters
  • service period: up to 10 000 km / 2 months

Equipment

  • digital control system
  • automatic speed control (ASC)
  • remote monitoring by means of GSM and GPS technologies
  • multiple control
  • air drier
  • antiskid device (by traction)

​Equipment on demand

  • rolling fitting of traction motors
  • electrodynamic brake (EDB)
  • wheel slide protection (by breaking)
  • deformation elements
  • remote radio control
  • automatic shunting coupler
  • camera system

The undercarriage of the locomotive comprises two double-axle bogies with individual drive of all wheelsets. The traction motors are nose-suspended on the axles using sliding or roller bearings. The drive unit is located in the front hood of the locomotive and comprises the Caterpillar diesel engine and the Siemens traction alternator. The front hood space includes most of the auxiliary drives, the engine cooling block and the pneumatic unit. The rear hood contains an electric switchboard, or the electrodynamic brake block. The power regulation and control of the entire locomotive is ensured by the control system made by MSV elektronika with automatic speed control (ASC) function and remote diagnostics by means of GSM and GPS technologies. The locomotive is equipped with a DAKO air brake and a parking (hand) brake. The locomotive can also be equipped with an electrodynamic brake (EDB) upon request.

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