SP1900 EMU

SP1900 EMU (IKK Train) SP1900 / SP1950 / KRS991 / 1151 港鐵近畿川崎列車
A MTR Tuen Ma line SP1900 approaching Hin Keng
The interior of a Tuen Ma line SP1900 EMU
In service	2001–present
Manufacturer	Kinki Sharyo & Kawasaki
Order no.	SP1900, SP1950, KRS991, 1151
Built at	Kobe, Hyōgo Prefecture, Japan
Constructed	1999–2000 (East Rail line) 2002–2003, 2007 (West Rail line newly-built) 2015, 2016, 2017 (Refurbished West Rail line sets) 2003-2004 (Ma On Shan line)
Entered service	2001 (East Rail line) 2003, 2008, 2016–2018 (West Rail line after refurbishment) 2004, 2017–2018 (Tuen Ma line after refurbishment)
Refurbished	2015–2023
Number built	392 cars
Number in service	48 sets (384 cars)
Number scrapped	8 cars (driving trailer cars unable to be formed as a complete train)
Formation	8 cars per trainset Formerly: 12 cars per trainset (East Rail line) 7 cars per trainset (West Rail line) 4 cars per trainset (Ma On Shan line)
Fleet numbers	D301-396
Capacity	C, H, M, P Cars: 452 D Cars: 430 F Cars: 72 (excluding standing capacity) / 216 (with standing capacity)
Owners	Kowloon-Canton Railway Corporation
Operators	KCR (2001–2007) MTR (2007–present) (Still owned by the KCR Corporation).
Depots	Pat Heung, Tai Wai (SP1950 trains only)
Lines served	Tuen Ma line
Specifications
Car body construction	Stainless steel
Train length	195,376 mm (641 ft 0 in) (8-car Tuen Ma line) 291.92 m (957 ft 9 in) (Former 12-car East Rail line) 171.24 m (561 ft 10 in) (Former 7-car West Rail line) 98,832 mm (324 ft 3.0 in) (Former 4-car Ma On Shan line)
Car length	25,280 mm (82 ft 11.3 in) (end cars) 24,136 mm (79 ft 2 in) (intermediate cars)
Width	3.1 m (10 ft 2.05 in)
Height	3.99 m (13 ft 1.09 in) (without roof equipment)
Floor height	1.07 m (3 ft 6.1 in) (ever-so-slightly higher than MLR) (Under the Wires to Lo Wu, The Railway Magazine, November 1983)
Platform height	1,066.8 mm (3 ft 6.0 in) (Under the Wires to Lo Wu, The Railway Magazine, November 1983)
Doors	5 (Standard compartment)
Maximum speed	160 km/h (99 mph) (design) 130 km/h (81 mph) (service)
Weight	37 t (36.4 long tons; 40.8 short tons)
Traction system	Mitsubishi Electric MAP-242-A25V93/93A 2-level IGBT–C/I
Traction motors	16 × Mitsubishi MB-5084-A/A2 240 kW (321.8 hp) 3-phase AC induction motor
Power output	3.84 MW (5,149.5 hp)
Acceleration	1 m/s2 (3.3 ft/s2)
Deceleration	1 m/s2 (3.3 ft/s2) (service) 1.35 m/s2 (4.4 ft/s2) (emergency)
Power supply	Mitsubishi Electric ATM5 Transformer, 2610 KVA Capacity, PWM 2-Level control, forced air cooling system
Electric system(s)	25 kV 50 Hz AC overhead catenary
Current collector(s)	Pantograph
UIC classification	2′2′+Bo′Bo′+Bo′Bo′+2′2′+2′2′+Bo′Bo′+Bo′Bo′+2′2′
Bogies	KD312 / KW165 (powered), KD312A / KW166 (trailer)
Braking system(s)	Knorr-Bremse electropneumatic and regenerative
Safety system(s)	SelTrac
Coupling system	Tightlock
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Notes/references
Door centres: 3,800 mm (12 ft 5.606 in) Door width: 1,400 mm (4 ft 7.118 in)

The SP1900 EMU / SP1950 EMU or IKK Train (formerly KCR EMU SP1900 / SP1950 EMU; 港鐵近畿川崎列車, also known as the Millennium Train during the public promotion) is a model of train that runs on Hong Kong's Tuen Ma line. It was the second model of electric multiple unit rolling stock of the Kowloon-Canton Railway Corporation (KCRC) (after the Metro Cammell EMU, introduced in the 1980s), though they have been operated by MTR Corporation (MTRC) after it merged with KCRC in 2007.

The trains were delivered in several phases. The phases have different model numbers but an identical appearance. The models numbers include: SP1900, SP1950, KRS991 and 1151. Unless specified, the name SP1900 would apply to describe all the model numbers in this article. Another model, 1141A (MTR CRRC Changchun EMU), is similar in design to the SP1900, but was built by a different manufacturer and has a slightly different appearance. After the rail merger, the KCR logos on the SP1900 EMU were replaced with those of MTR, and a revised route map was introduced in the train interiors.