Since 2007, diesel locomotives type 311D and 311Da (adapted to travelling along the 1520 mm wide track) have been modernised as a result of cooperation between NEWAG SA and the American General Electric (GE).
The choice of NEWAG as the cooperation partner on the European market in the scope of modernization of locomotives was preceded by three-year negotiations and a positive verification of the company from Nowy Sącz by the American partner. Since 2007, NEWAG SA has conducted several dozen modernizations of this type.
The 311D/311Da type freight locomotive originated as a result of a complete overhaul of the Russian M62-type locomotive known on the Polish market under designation ST44.
The key scope of the locomotive modernization was mounting the integrated drive unit (engine, generator, compressor, cooling system) which is delivered fully assembled by General Electric. The chassis is the ST44 locomotive construction, with a proven track record, which undergoes the complete overhaul. The original Russian type ED 118 traction engines were used, whose insulation class has been increased to class H. The locomotive has the Oerlikon pneumatic brake system. Moreover, it is equipped with new, ergonomic driver’s cabs ensuring high working comfort. Modern microprocessor locomotive control enables the maximum exploitation of its traction features.
|Type||311D / 311Da|
|Axle configuration||Co Co|
|Track width 311D/311DA||1435 mm / 1520 mm|
|Overall length (with buffers)||~17550 mm|
|Max axlw base||12800 mm|
|Bogie axle base||4200 mm|
|Wheel thread diameter||1050 mm|
|Maximum width||2950 mm|
|Maximum height over rail head||4615 mm|
|Locomotive total weight||118t ± 3%|
|Fuel supplies weight||~3300 kg|
|Weight of water in cooling system||~800 kg|
|Sand weight||600 kg|
|Maximum speed||100 km/h|
|Continuous speed||17,4 km/h|
|Tractive force at continuous speed||331 kN|
|Maximum start-up tractive force||392 kN|
|Type||7FDL 12 EFI 45 V-12 4-stroke cylinder, turbocharging|
|Nominal power||2133 kW (2900 KM)|
|Nominal rotary speed||1050 obr/min|
|Number of strokes||4|
|Number of cylinders||12|
|Fuel type||Diesel oil|
|Amount of oil||1211 litrów|
|Weight of oil||~1162 kg|
|Cylinder bore/piston stroke||229/267 mm|
|Traction engines type||ED 118A GE|