1. Tender

2. Design

3. Equipment
    Main propulsion controller 

4. Train formation

5. Doubts about the consortium

6. References

The Kawasaki Heavy Industries & CRRC Qingdao Sifang^[2] C151C are the sixth generation of rolling stock to be introduced on the existing East West and North South lines of Singapore's Mass Rapid Transit (MRT) system. Twelve trains were purchased and they will be delivered between 2017 and 2019, where these trains were tested before the full service in 2019.^[3][4]

The first of the 12 trains was delivered on 27 October 2017. The interior design was unveiled on 28 February 2018 at the Tuas Depot with two trains showcased.

It brought up the total number of trains operating on the NSEWL to 198 trainsets, up from the previous 186 trainsets. The addition of the 12 trains also tripled the number of trains on the North-South and East-West Lines when they were first opened. The first three C151C trainsets commenced revenue service on 30 September 2018 on the North-South Line.^[5] All of them commenced service on 23 March 2019.

Tender

The tender for trains under the contract 151C was closed on 14 May 2015 with three bids. The LTA has shortlisted all of them and the tender results were published on 22 September 2015.^[6][7]

Design

The C151C will be the first MRT rolling stock on the NSEWL to be fitted with fold-up seats.^[8]

The C151C retains most of the features of the C151B trains, albeit with a different livery. It's the second train following LTA's recent changes to its livery regulations, incorporating green and red stripes against a white background, and the first trains on the North South and East West Lines to bear it. The front headlights have been replaced by LEDs but retained the placement like the C151B.

C151C is the second train type to be equipped with STARIS 2.0 which consists of 2 LCD screens displaying the travel information, such as the upcoming stations the train will arrive at, door closing warnings and attractions nearby the station.

The C151C features a new current collector device which can report information to the Train Integrated Management System (TIMS) if any collector shoe is sheared off the bogie.^[9]

Equipment

Main propulsion controller

The C151C trains are the fifth commuter type Electric Multiple Unit (EMU) made in Japan to feature electric systems fully manufactured by Fuji Electric. Propulsion is controlled by VVVF Inverter with 2-level IGBT semiconductor controller, rated at 415 kV. Each inverter unit controls two motors on one bogie (1C2M), and one motor car features two such units. Motors are three-phase AC induction type, model MLR109, with a maximum output of 140 kW.

Train formation

The configuration of a C151C in revenue service is DT-M1-M2-M2-M1-DT

The car numbers of the trains range from x701 to x724, where x depends on the carriage type. Individual cars are assigned a four-digit serial number. A complete six-car trainset consists of an identical twin set of one driving trailer (DT) and two motor cars (M1 & M2) permanently coupled together. For example, set 705/706 consists of carriages 3705, 1705, 2705, 2706, 1706, and 3706.

• The first digit identifies the car number, where the first car has a 3, the second has a 1, and the third has a 2.
• The second digit is always a 7.
• The third digit and fourth digit are the train identification numbers. A full-length train of six cars has two different identification numbers. For example, 705/706 (normal coupling) or 705/720 (cross-coupling).
  • Kawasaki Heavy Industries & CRRC Qingdao Sifang built sets 701-724.

Doubts about the consortium

The award of the C151C turnkey contract to the Kawasaki Heavy Industries & CSR 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, doubted the decision by the Land Transport Authority to award the subsequent contracts, specifically both the design and supply of C151C and CT251 rail cars to the same consortium in 2015.^[10] This was despite the Land Transport Authority and operator SMRT Trains being officially acknowledged on the C151A crack defects as early as 2013.^[11][12]

References

• OmpT protease
• Omrabad
• Omrabad, Hamadan
• O & M Railroad
• O&M Railroad
• Omranabad
• Omranabad, Ardabil
• Omranabad, East Azerbaijan
• Omran al-Zoubi
• Omranarad, Ardabil
• Omran Company
• Omran (disambiguation)
• Omrane Sadok
• Omrani
• Omrani (disambiguation)
• Omrani, Iran
• Omran Jesmi
• Omran Kandi
• Omran Sahel
• Omran Sharaf
• Omran Zoabi
• Omrao Khan
• OMRDD
• Omre
• OMRE