Siemens C651

Siemens AG (SIE) C651
Siemens AG (SIE) C651
	A Siemens C651 train.
	Interior of a Siemens C651 train
In service	2 May 1995 – 30 September 2024 (29 years, 151 days)
Manufacturer	Siemens Mobility, SGP Verkehrstechnik
Assembly	Vienna, Austria
Constructed	1993 – 1994
Entered service	2 May 1995; 29 years ago
Refurbished	2016 – 2018; Singapore Rail Engineering (SRE) (cancelled)
Retired	30 September 2024; 8 days ago
Scrapped	September 2020 - 2024
Number built	114 Vehicles (19 Sets)
Number preserved	4 Vehicles
Number scrapped	92 Vehicles
Successor	Alstom Movia R151
Formation	6 per trainset; DT–M1–M2+M2–M1–DT
Fleet numbers	201/202 – 237/238
Capacity	1920 passengers (372/336 seats)
Operators	SMRT Trains (SMRT Corporation)
Depots	Bishan; Ulu Pandan; Tuas; Changi;
Lines served	NSL North–South Line; EWL East–West Line;
Specifications
Car body construction	Aluminium-alloy double-skinned construction
Train length	138.5 m (454 ft 4+3⁄4 in)
Car length	23.65 m (77 ft 7 in) (DT); 22.8 m (74 ft 10 in) (M);
Width	3.2 m (10 ft 6 in)
Height	3.7 m (12 ft 1+5⁄8 in)
Doors	1,450 mm (57+1⁄8 in), 8 per car, 4 per side
Wheel diameter	850–775 mm (33.5–30.5 in) (new–worn)
Wheelbase	2,500 mm (98 in)
Maximum speed	90 km/h (56 mph) (design); 80 km/h (50 mph) (service);
Weight	35 t (34 long tons; 39 short tons) (unladen); 53.8 t (53.0 long tons; 59.3 short tons) (laden);
Axle load	16 t (16 long tons; 18 short tons)
Traction system	Siemens PWM GTO–VVVF
Traction motors	16 × Siemens 140 kW (190 hp) 3-phase AC induction motor w/ enclosed-ventilated lateral drive
Power output	2.24 MW (3,000 hp)
Transmission	5.94 : 1 (107 / 18) gear ratio
Acceleration	1 m/s2 (3.3 ft/s2)
Auxiliaries	110 V DC
Electric system(s)	750 V DC third rail
Current collector(s)	Collector shoe
UIC classification	2′2′+Bo′Bo′+Bo′Bo′+Bo′Bo′+Bo′Bo′+2′2′
Bogies	Duewag SF 2100
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)	Original: Westinghouse Brake and Signal Company FS2000 ATP fixed block ATC under ATO GoA 2 (STO), with subsystems of ATP and ATS; Current: Thales SelTrac® moving block CBTC ATC under ATO GoA 3 (DTO), with subsystems of ATP, NetTrac ATS and CBI;
Coupling system	Scharfenberg coupler
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

The Siemens C651 was the second generation electric multiple unit rolling stock on the North–South and East–West lines of Singapore's Mass Rapid Transit (MRT) system, manufactured by Siemens Mobility (SIE) and SGP Verkehrstechnik in Vienna, Austria under Contract 651. A total of 114 cars consisting of 19 train-sets were purchased in 1992 and introduced into service from 1995 to 2024.

^ ^a ^b "New MRT Train Rolls Out in Vienna". Trackview. Singapore: MRTC. 1994. On 19 July 1994...the first MRT train rolled out of the SGP plant in Vienna
^ ^a ^b ^c ^d "First Class Bogies" (PDF). Siemens. Archived from the original (PDF) on 22 July 2019.
^ Woodland, Daniel (August 2004). "Optimisation of Automatic Train Protection Systemstion Systems" (PDF). p. Appendix C Page 32 to Page 33. Archived (PDF) from the original on 15 June 2020. Retrieved 15 June 2020.
^ "THALES Urban Rail Signalling Singapore – North-South / East-West Lines" (PDF). Archived (PDF) from the original on 15 June 2020. Retrieved 16 June 2020.
^ 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.

[sie-1] "New MRT Train Rolls Out in Vienna". Trackview. Singapore: MRTC. 1994. On 19 July 1994...the first MRT train rolled out of the SGP plant in Vienna

[bogie-2] "First Class Bogies" (PDF). Siemens. Archived from the original (PDF) on 22 July 2019.

[Westinghouse_FS2K-3] Woodland, Daniel (August 2004). "Optimisation of Automatic Train Protection Systemstion Systems" (PDF). p. Appendix C Page 32 to Page 33. Archived (PDF) from the original on 15 June 2020. Retrieved 15 June 2020.

[thales_seltrac_SG_Brochure-4] "THALES Urban Rail Signalling Singapore – North-South / East-West Lines" (PDF). Archived (PDF) from the original on 15 June 2020. Retrieved 16 June 2020.

[thales-5] 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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