Siemens C651

Siemens C651
A Siemens C651 train approaching Paya Lebar MRT station.
Inside the centre motor car of an unrefurbished Siemens C651 train.
In service2 May 1995 - present
ManufacturerSiemens AG
AssemblyVienna, Austria
Constructed1993–1994
RefurbishmentSingapore Rail Engineering
2016–2018
Number built114 Vehicles (19 Trainsets)
Number in service24 Vehicles (4 Trainsets)
Formation6 per trainset
DT–M1–M2–M2–M1–DT
Fleet numbers201/202 ~ 237/238
Capacity1920 passengers
372/336 seats
Operator(s)SMRT Trains (SMRT Corporation)
Depot(s)Bishan
Changi
Tuas
Ulu Pandan
East Coast (Future)
Line(s) served EWL  East West Line
 NSL  North South Line
Specifications
Car body constructionAluminium-alloy double-skinned construction
Car length23 m (75 ft 5+12 in)
Width3.2 m (10 ft 6 in)
Height3.7 m (12 ft 1+58 in)
Doors1,450 mm (57+116 in), 8 per car
Maximum speed90 km/h (56 mph) (design)
80 km/h (50 mph) (service)
Weight35 t (34 long tons; 39 short tons) (unladen)
53.8 t (53.0 long tons; 59.3 short tons) (laden)
Traction systemCurrent: GTOVVVF PWM (Siemens)
Replacement: IGBTVVVF (Toshiba)[1]
Traction motorsCurrent: Three-phase AC induction motor enclosed-ventilated lateral drive
140 kW (190 hp) (Siemens)
Replacement: Permanent Magnet Synchronous Motor (Toshiba)
Power output2.24 MW (3,000 hp)
Transmission5.94 : 1 Gear Ratio
Acceleration1.0 m/s (3.3 ft/s)
Auxiliaries110 V DC
Electric system(s)750 V DC third rail
Current collection methodCollector Shoe
UIC classification2'2' + Bo'Bo' + Bo'Bo' + Bo'Bo' + Bo'Bo' + 2'2'
Braking system(s)1st service brake: Self-excited, mixed service and resistor brake
2nd service brake: Pneumatic compressed air wheel tyre block brake
Parking brake: Compressed air pressure spring-loaded brake
Safety system(s)Current: Thales SelTrac® Moving Block Communications-based train control (CBTC) ATC with subsystems of ATO GOA 3 (DTO), ATP, NetTrac ATS, CBI[2]
Past: Westinghouse Brake and Signal Company Ltd fixed block ATC with subsystems of ATO GOA 2 (STO), ATP, ATS
Track gauge1,435 mm (4 ft 8 12 in) standard gauge

The Siemens C651, also known as Contract 651 or SIE C651, is the second generation Electric multiple unit rolling stock in operation on the North South and East West Lines of Singapore's Mass Rapid Transit (MRT) system. A total of 114 cars consisting of 19 train-sets were purchased in 1993 and introduced from 1994 onwards and were built by Siemens in Austria.

  1. 1.0 1.1 Hoe, Pei Shan (5 July 2013). "Older MRT trains to get new motors from Japan". Straits Times. Retrieved 13 May 2015.
  2. Fang, Joy (2 February 2012). "Coming: $600m upgrade for MRT system/New train measures a 'catch-up'". My Paper. pp. A2, A6. Archived from the original on 18 May 2015. Retrieved 13 May 2015.

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