Sri Lanka Railways S10

Class S10 is a diesel multiple unit (DMU) train, built for Sri Lanka Railways by China South Locomotive & Rolling Stock Corporation and imported in 2008. Fifteen S10 DMUs were ordered to strengthen commuter services on the main line. These DMUs are with advanced technical features and S10s do considerable service in SLR schedule.

Sri Lanka Railways Class S10
Class S10 DMU
Third Class Car
In service2008-present
ManufacturerChina South Locomotive & Rolling Stock Corporation Limited[1]
Built atSifang
Number built15
Number in service15
Formation6 cars per trainset 1DPC + 4 TC + 1 DTC (DPC-Driving power coach, TC- trailer coach, DTC-Driving trailer coach)
Capacity240 (Third Class)
Operator(s)Sri Lanka Railways
Car length65 ft (19.81 m)[2]
Maximum speed100 km/h (62 mph)
Weight76 t (75 long tons; 84 short tons)
Prime mover(s)MTU 12V4000R41[3]
Engine typeV12 diesel
Power output2,000 hp (1,500 kW)
TransmissionOn-board Diesel-electric AC/DC
Braking system(s)Air, Dynamic
Coupling systemAutomatic (dual)
Track gauge5 ft 6 in (1,676 mm)


At nearly 2,000 hp (1,500 kW) this DMU provides power outputs (but lower than other DMUs used in Sri Lanka) to give high rates of acceleration and passenger capacity.

Technical specifications

This engine is equipped with common rail diesel injection technology which helps to control internal combustion correctly. The alternating current which is produced by the generator is converted to direct current and transferred to traction motors. A computer system is installed to control most of the activities of the engine. The driving cab consists of a desk type control stand and touch-sensitive visual display unit. Also S10 can be used for multiple unit working and can be coupled up to 3 train-sets.


This DMU is mainly operating on Sri Lanka Railways Main Line up to Rambukkana and can be used on any line except the Kelani Valley Line. S10s are commonly used in stopping passenger services. Because of the great length of car body, these are unable to run on the Kelani Valley Line because of the sharp curves on the line. Notable operating routes of S10s are;

See also


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