ŽS series 621

ŽS series 621 is a Serbian code for shunting Czech-made diesel-electric locomotive class on Serbian Railways. This class has nicknames "Žutka" (Yellow) and "Osica" (little wasp) as they were originally painted in yellow livery and "Trafika" (Newsstand).[1][2]

ŽS series 621
ŽS 621 locomotive
Type and origin
Power typeDiesel-electric
BuilderČMKS
Build date2002 - 2006
Specifications
Configuration:
​
 • UICBo
Gauge1,435 mm (4 ft 8 1⁄2 in)
Wheel diameter1,050 mm (41.34 in)
Length9,450 mm (31 ft 0 in)
Width3,100 mm (10 ft 2 in)
Loco weight36.00 t (79,400 lb)
Cylinders16
TransmissionElectric
Performance figures
Maximum speed80 km/h (50 mph)
Power output392 kW (530 hp)
Tractive effort108 kN (24,280 lbf)
Career
OperatorsŽS, ŽT RBK
ClassŽS 621
Nicknames"Žutka", "Osica" and "Trafika"
LocaleSerbia

History

Serbian Railway have bought first 621 series shunter locomotive in 2001. In 2005 year 22 more locomotives were introduced in service. Later two more second-hand shunters from Czech Republic industrial railways were bought. This series is originally ČMKS 709, series 621-100 is 709.401, 621-200 is 709.701 and 621-300 is 709.5. The Kolubara coal basin also bought 621 class locomotives for hauling lighter freight coal trains.

There are today 15 locomotives of this series operated by Serbian Railways and two operated by Rail transport of Kolubara coal basin. These locomotives are built for heavy shunting.

Livery

Locomotives have yellow livery. Last two 621-300 second-hand shunters from Czech Republic have blue-white livery and first bought locomotive has red-white livery. Two 621 series locomotives operated by Rail transport of Kolubara coal basin are painted in green-yellow-black livery.

The locomotive was seen in one of the train simulator games called Derail Valley available on Steam and Oculus Rift stores. The locomotive is classified as DE2 (Diesel-Electric 2) and is usable in the game after the player has been provided with a license to haul trains and also gets one to drive this shunter. Even though the user has a hauling license, the locomotive is better suited only to move trains better stalling areas in the shunting yard owing to its size and power output rather than for hauling trains over long distances.

References
  1. "ŽS 621". Serbian Railways Fan Club (in Serbian).
  2. "ŽS 641". Railway fun club Belgrade (in Serbian). Archived from the original on October 29, 2013.


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