| Background: |
|
| Sri Lanka Railways Class S12 | |
| Interiorcaption: | Second Class Passenger Compartment |
| Manufacturer: | CSR |
| Factory: | Sifang, China |
| Family: | D 22 (KV Set) |
| Yearconstruction: | 2012 |
| Numberbuilt: | 22 trainsets |
| Numberservice: | 22 |
| Formation: | MCG + 3xTC + 3xSC + 1xFC + 1xRC + MCG (Main Line Set), MCG + 5xTC + DDCG (KV Set) |
| Operator: | Sri Lanka Railways |
| Carbody: | Manufactured In Stainless steel |
| Carlength: | 502NaN2 |
| Weight: | Engine Horse Power 1950 (KW 1450) |
| Capacity: | 44 (AFC) + 66*3 (TC) + 52 (TCBU) + 44*3 (SC) = 426 |
| Maxspeed: | 100km/h (De-rated 80km/h) |
| Engine: | MTU 12V4000R41 Two engines per unit in Main Line Set |
| Enginetype: | V12 |
| Transmission: | Diesel-electric |
| Brakes: | Air (Knorr-Bremse), Dynamic |
| Coupling: | Automatic (dual) |
Class S12 is a diesel multiple-unit (DMU), built for Sri Lanka Railways by China's CSR Corporation. The first batch arrived in Sri Lanka in August 2012. They were built to replace locomotive-hauled passenger trains. Seven of the S12 DMUs were ordered to strengthen long-distance travel on the Main line from Colombo to Badulla. Four of S12s will serve the Kelani Valley Line. The remaining two designed as luxury trains.[1]
The S12 DMUs were meant to improve services on the Main Line and the Kelani Valley Line. The steep slopes on the up-country portion of the Main Line is difficult to operate. Prior to the S12, only a few models of locomotives were capable of operating this line. As DMUs started to replace locomotive-operated trains on other lines, the up-country Main Line could not be operated by DMUs. The S12 is the first DMU to handle these conditions.
The locomotives are purchased under a USD 101 million credit line agreement with China. The loan would be settled within 15 years.[2]
In September 2012, the first units had trial runs.[1] The first Main-Line train using the S12 began on 23 October 2012.[3]
| Class | Configuration | Operator | No. in service | Year Built | Cars per Set | Unit numbers. |
|---|---|---|---|---|---|---|
| Class S12 | Main Line sets | Sri Lanka Railways | 7 | 2012 - 2013 | 8 | 917 - 939 |
| Office sets | 4 | 7 | ||||
| Special Sets | 2 | 8 |
Main Line sets
Office sets
Luxury sets