Kawasaki Heavy Industries & Nippon Sharyo C751B

Kawasaki Heavy Industries & Nippon Sharyo (KNS) C751B
Kawasaki Heavy Industries & Nippon Sharyo (KNS) C751B
	A C751B trainset at Bukit Batok station.
	Interior of a C751B motor compartment.
Stock type	Electric multiple unit
In service	28 January 2000 – 30 September 2024 (24 years, 246 days)
Manufacturer	Kawasaki Heavy Industries and Nippon Sharyo
Designer	GK Industrial Design
Built at	Kobe, Hyogo (Kawasaki) and Toyokawa, Aichi (Nippon Sharyo), Japan
Constructed	1999 – 2001
Entered service	28 January 2000
Retired	7 December 2024
Scrapped	March 2021 – December 2024
Number built	126 vehicles (21 sets)
Number preserved	12 vehicles
Number scrapped	114 vehicles
Successor	Alstom Movia R151
Formation	6 per trainset; DT–M1–M2+M2–M1–DT
Fleet numbers	311/312 – 351/352
Capacity	1920 passengers (276/288 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	138.86 m (455 ft 6+7⁄8 in)
Car length	23.83 m (78 ft 2 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
Maximum speed	90 km/h (56 mph) (design); 80 km/h (50 mph) (service);
Weight	222.8 t (219.3 long tons; 245.6 short tons) (unladen); 320.3 t (315.2 long tons; 353.1 short tons) (laden);
Traction system	Fuji Electric IGBT–VVVF (output 415 kVA)
Traction motors	16 × Fuji Electric MLR109 140 kW (188 hp) self-ventilated 3-phase AC induction motor; 550V 193A 1760 r/min
Power output	2.24 MW (3,004 hp)
Transmission	Westinghouse-Natal (WN) Drive
Acceleration	1 m/s2 (3.3 ft/s2)
Deceleration	1.3 m/s2 (4.3 ft/s2) (service)
Auxiliaries	Fuji Electric auxiliary inverter with battery charger; 80 kVA + 16 kW
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	bolsterless air-spring monolink axlebox type
Braking system(s)	Regenerative and electro-pneumatic
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 Kawasaki Heavy Industries & Nippon Sharyo (KNS) C751B was the third generation electric multiple unit rolling stock that operated on the North–South and East–West lines of Singapore's Mass Rapid Transit (MRT) system from January 2000 to September 2024, manufactured by Kawasaki Heavy Industries & Nippon Sharyo (KNS) under Contract 751B. 21 trainsets of 6 cars each were purchased at S$231 million, and it was the first rolling stock to feature VVVF insulated-gate bipolar transistor traction control system. Kawasaki manufactured 66 cars and Nippon Sharyo manufactured 60 cars respectively with no comparable differences, having been built to agreed specifications.