Kawasaki Heavy Industries & CRRC Qingdao Sifang T251
Class of electric multiple units in Singapore
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The Kawasaki Heavy Industries & CRRC Qingdao Sifang T251 is the first generation electric multiple unit rolling stock in operation on the Thomson–East Coast line of Singapore's Mass Rapid Transit (MRT) system, manufactured by a consortium of Kawasaki Heavy Industries and CRRC Qingdao Sifang (formerly CSR Qingdao Sifang) under Contract Turnkey 251.
_Thomson-East_Coast_MRT_Line_Kawasaki-CRRC_Qingdao_Sifang_CT251_2027_@_Katong_Park_2024-07-29.jpg)
| Kawasaki Heavy Industries & CRRC Qingdao Sifang T251 | |
|---|---|
A T251 train arriving at Katong Park MRT station | |
 Interior of one of the driving motor cars. | |
| Stock type | Electric multiple unit |
| In service | 31 January 2020 – Present |
| Manufacturers | |
| Built at | Qingdao, Shandong, China |
| Constructed | 2017 – 2022 |
| Entered service | 31 January 2020 |
| Number built | 364 Vehicles (91 Sets) |
| Number in service | 280 Vehicles (70 Sets) |
| Formation | 4 per trainset DM1–M–T–DM2 |
| Fleet numbers | 2001 – 2091 |
| Capacity | 1280 passengers (156 seats) |
| Operator | SMRT Trains (SMRT Corporation) |
| Depot | |
| Line served | TEL Thomson–East Coast line |
| Specifications | |
| Car body construction | Welded aluminium |
| Train length | 92,900 mm (304 ft 9+1⁄2 in) (with 4 Cars) |
| Car length |
Couplers)
Couplers) |
| Width | 3,200 mm (10 ft 6 in) |
| Height | 3,672 mm (12 ft 5⁄8 in) |
| Doors | 1,450 mm (57+1⁄8 in), 10 per car, 5 per side |
| Articulated sections | 4 |
| Maximum speed |
|
| Weight |
|
| Traction system | Mitsubishi Electric MAP-124-75V298 hybrid SiC-IGBT–VVVF[1][2] |
| Traction motors | 12 × Mitsubishi MB-5162-A 120 kW (160 hp) asynchronous 3-phase AC |
| Power output | 1.44 MW (1,930 hp) |
| Acceleration | 0.95m/s^2 average |
| Auxiliaries | Mitsubishi HF-IBT190A IGBT Auxiliary Power Supply Box |
| Electric systems | 750 V DC third rail[3] |
| Current collection | Collector shoe |
| UIC classification | Bo′Bo′+Bo′Bo′+2′2′+Bo′Bo′ |
| Bogies | Air-suspended, bolsterless bogie |
| Safety systems | Alstom Urbalis 400 moving block CBTC ATC under ATO GoA 4 (UTO), with subsystems of ATP, Iconis ATS and Smartlock CBI[4][5][6] |
| Coupling system | Dellner |
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
91 four-car medium-capacity trainsets were purchased by LTA for the Thomson-East Coast line in 2014 and the first set was delivered on 25 May 2018.[7][3]
Seven additional trains were scheduled to be procured for the Johor Bahru–Singapore Rapid Transit System that will connect Malaysia to Singapore, as the Malaysian and Singaporean governments agreed to largely identical technical specifications for both lines.[8] In 2019, Malaysia proposed use of light rail vehicles instead, as part of efforts to cut costs.[9] 8 vehicles were therefore purchased from CRRC Zhuzhou Locomotive Co.[10]
Tender
The tender for trains under the contract turnkey 251 was closed on 15 November 2013 with six bids. The Land Transport Authority has shortlisted all of them and the tender results were published on 28 May 2014.[11][12]
| S/N | Name of Tenderer | Amount (S$)[12] |
|---|---|---|
| 1 | Alstom Transport S.A. / Alstom Transport (S) Pte Ltd Consortium | 954,410,000 |
| 2 | Kawasaki Heavy Industries, Ltd. / Kawasaki Heavy Industries(Singapore) Pte Ltd & CRRC Qingdao Sifang Consortium / Singapore CRRC Sifang Railway Vehicles Service Pte. Ltd. Consortium | 749,840,000 |
| 3 | Hyundai Rotem Company | 765,856,000 |
| 4 | Bombardier (Singapore) Pte Ltd | 810,179,619 |
| 5 | Construcciones y Auxiliar de Ferrocarriles, S.A. | 939,645,996 |
| 6 | CRRC Zhuzhou Locomotive (formerly CSR Zhuzhou Electric Locomotive Co., Ltd.) / Siemens Pte Ltd, Singapore Consortium | 849,623,569 |
Kawasaki will be responsible for the overall project management, design, manufacturing of bogies and procurement of major components. CRRC Qingdao Sifang will be in charge of manufacturing, final fitting and assembly of complete MRT trains and factory testing. Kawasaki (Singapore) will be responsible for the delivery of complete MRT trains to the depot, on-site testing and commissioning.[3]
Design and features
The T251 trains have a livery of yellow and burnt sienna stripes running around the cars, similar to C951(A) trains, which bear cerulean blue and blue stripes. They include several features unique to this rolling stock, such as:[13]
- A Dynamic Route Map Display (DRMD), which is termed "Train Vision" and supplied by Mitsubishi Electric;
- Perch seats which are located at the ends of each train car;
- Tip-up seats in 61 of the 91 trainsets (Trainsets 2012 to 2072);
- 10 doors per car (5 per side)
Two of the T251 trains, sets 2012 and 2013 were equipped with automatic track inspection system, found specifically on cars 20123 and 20133. This system includes cameras, lasers, and sensors to detect track defects such as rail cracks, missing fasteners, or foreign objects on the tracks.[13]
Train formation
The coupling configuration of a T251 in revenue service is DM1–M–T–DM2. D stands for "driver's desk", M for "motor" and T for "trailer".
| Car Type | Quantity | Driver Cab | Motor | Collector Shoe | VVVF inverter | Auxiliary power supply | Car Length | Wheelchair Bay | |
|---|---|---|---|---|---|---|---|---|---|
| m | ft in | ||||||||
| DM | 2 | ✓ | ✓ | ✗ | 23.6 | 77 ft 5.1 in | ✗ | ||
| M | 1 | ✗ | 22.8 | 74 ft 9.6 in | ✓ | ||||
| T | ✗ | ✓ | ✗ | ✓ | 22.8 | 74 ft 9.6 in | |||
Kawasaki and CRRC Qingdao Sifang (formerly CSR Qingdao Sifang) built sets 2001 – 2091.
The car numbers of the trains range from 2001x to 2091x, where x depends on the carriage type. Individual cars are assigned a five-digit serial number. A complete four-car trainset consists of one trailer (T), one motor car (M) and two driving motor cars (DM1 & DM2) permanently coupled together.
- The first digit is always a 2.
- The second digit is always a 0.
- The third digit and fourth digit identifies the set number.
- The fifth digit identifies the car number, where the first car has a 1, the second has a 2, the third has a 3 and the fourth has a 4.
For example, set 2005 consists of carriages 20051, 20052, 20053 and 20054.
Doubts about the consortium
The award of the T251 turnkey contract to the Kawasaki & CRRC Qingdao Sifang consortium was briefly politicised in Singapore, when the defects from the relatively new C151A trains constructed by the same consortium were made public on 5 July 2016. This was after Gerald Giam from the Workers' Party commenting through an official Facebook post doubting the decision by the Land Transport Authority to award the subsequent contracts, specifically both the design and supply of C151C and T251 rail cars to the same consortium in 2015.[14] This was despite the Land Transport Authority and operator SMRT Corporation being officially acknowledged on the C151A crack defects as early as 2013.[15][16]
