MTR Metro Cammell EMU (AC)

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East Rail line Metro Cammell EMU (MLR) 3094/K01/K03/K05 stock 港鐵中期翻新列車
A refurbished MLR train at Sha Tin station
Interior of a refurbished MLR train
In service	6 May 1982 – 6 May 2022 (40 years, 0 days)
Manufacturer	Metro-Cammell
Built at	Washwood Heath, Birmingham, England
Constructed	1980–1990
Entered service	6 May 1982; 42 years ago (1982-05-06)[1]
Refurbished	GEC-Alsthom (1996–1999)
Retired	6 May 2022; 2 years ago (2022-05-06)
Scrapped	2021–2022 (E45: 1984)(E70/E92: 2020)
Number built	354 cars (29 sets and 6 surplus cars)
Number in service	None
Number preserved	3 cars (unrefurbished) and 6 cars (refurbished)
Number scrapped	28 sets (2 cars [in 1984 accident], 1 car [in 1987 depot accident]; 1 train set [Accident/Vandalism])
Successor	Hyundai Rotem EMU (R-Train)
Formation	12-car (including 1 First Class car) (6 and 9 cars in the past)
Fleet numbers	1xx, 2xx, 3xx, 4xx, 5xx, 6xx
Capacity	1xx & 3xx cars: 329 passengers per car 2xx, 5xx & 6xx cars: 332 passengers per car 4xx cars: 72 seating passengers per car Total capacity: 3750 people per train
Operators	KCR (1982–2007) MTR (2007–2022)
Depots	Ho Tung Lau
Lines served	East Rail line
Specifications
Car body construction	Aluminium and plastic
Train length	287.62 m (943 ft 7+5⁄8 in)
Car length	23.77 m (77 ft 11+13⁄16 in) (cars with driver cab) 23.53 m (77 ft 2+3⁄8 in) (other cars) 24.12 m (79 ft 1+19⁄32 in) (cars with driver cab and couplers) 23.78 m (78 ft 7⁄32 in) (other cars with couplers)
Width	3.096 m (10 ft 1+7⁄8 in)
Height	3.75 m (12 ft 3+5⁄8 in) (without rooftop equipment) 4.32 m (14 ft 2+3⁄32 in) (with pantograph folded)
Floor height	3.5 ft (1,066.8 mm)[2]
Platform height	3.5 ft (1,066.8 mm)[2]
Entry	Level boarding
Doors	5 per side; 2 per side in First Class cars (originally 3 per side for all) Door centres:7.6 m (24 ft 11.213 in) → 3.8 m (12 ft 5.606 in) Door width: 1.4 m (4 ft 7.118 in)
Wheel diameter	850–775 mm (2 ft 9.5 in – 2 ft 6.5 in) (new–worn)[3]
Wheelbase	2.5 m (8 ft 2 in)[3]
Maximum speed	Design 120 km/h (75 mph) Service 120 km/h (75 mph) ATO limitation under TBL signalling 110 km/h (68 mph)
Axle load	16,000 kg (35,274 lb)
Traction system	GEC Traction 1982–1989: Tap changer 1989–present, K03/K05 Stock, refurbishment: GTO Thyristor phase angle control
Traction motors	G315AZ DC series-wound motor (GEC Traction)
Power output	225 kW (301.730 hp) per motor 3,600 kW (4,827.680 hp) per 12 car set
Acceleration	Maximum 2.56 km/(h⋅s) (1.591 mph/s)
Deceleration	3.168 km/(h⋅s) (1.969 mph/s) (service) 5 km/(h⋅s) (3.107 mph/s) (emergency)
Power supply	AC-DC
Electric system(s)	25 kV 50 Hz AC Catenary
Current collector(s)	Single-arm Pantograph
Bogies	Duewag SF2100[3]
Braking system(s)	WestingHouse Westcode 7-Step Electro-Pneumatic
Safety system(s)	Westinghouse Brake and Signal Company Ltd AWS (former), After 1994–1998: GEC-Alsthom TBL2 (enhanced with ATP and ATS with ATO (Year:2002), After 2021: Siemens Trainguard MT CBTC ATO and ATP
Coupling system	Tightlock coupling, [[Sharfenberg Coupler (No Electrical connection) |Shafenberg Coupler]], Semi-permanent coupler
Seating	Standard class: Longitudinal First class and standard class end areas: Transverse
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Notes/references
Bogie centres:16,100 mm (52 ft 9.858 in) Coupler Intermediate Carriage to Sharfenberg Coupler during Mid-Life refurbishment)

The East Rail line Metro Cammell EMU (also known as Mid-Life Refurbishment Train, Chinese: 港鐵中期翻新列車; or MLR Train) was a model of electric multiple unit built in 1980–1990 by Metro-Cammell for the original Kowloon–Canton Railway (now the East Rail line) in Hong Kong. The 29 sets were owned by and were originally operated by the Kowloon-Canton Railway Corporation (KCRC). They were operated by MTR Corporation (MTRC) after it merged with KCRC in 2007. Although another set of EMU trains from the same manufacturer operate on some of MTR's own lines, there are some significant differences between the two models, with the Metro Cammell EMUs of the original MTR being known as the M-Train.

The trains were delivered in several phases. The different phases of this series of train have entitled with different model numbers, including: 3094 stock, K01 stock, K03 stock and K05 stock. Regardless, all model numbers have an identical appearance. After the rail merger, the KCR logos on the MLR trains were replaced with those of MTR, and a revised route map was introduced in the train interiors. Skirts were also added to all carriages, but the pantograph cars had their skirts removed due to heating issues. The interior floor was also changed for a darker blue in between two red aesthetics, and a brighter blue in between two windows.

Since the 2007 merger, the MLR was the second oldest variation of EMU operating on the MTR network, behind the M-Train sets of from 1979. It was also the only electric multiple unit of the Mass Transit Railway that did not have regenerative braking, as noted due to the lack of motor sound and the presence of air brake sounds while braking. All of the sets were retired on 6 May 2022, on the 40th anniversary of the electrification of the East Rail Line, with the Hyundai Rotem EMUs replacing them prior to the opening of the extension of the East Rail line to Admiralty station.