MTR A-Stock EMU

A-Stock
Airport Express Line train
Interior of a █ Tung Chung Line A Stock.
In service	1998-present
Manufacturer	Adtranz, Construcciones y Auxiliar de Ferrocarriles
Built at	Beasain, Spain
Constructed	1994-1997
Formation	8 cars per trainset (originally 7 cars)
Operator	MTR
Depot(s)	Siu Ho Wan
Line(s) served	█ Tung Chung Line █ Airport Express
Specifications
Doors	10 per car (TCL stock and AEL K car) 4 per car (AEL stock)
Maximum speed	135 km/h (84.375 mph)
Acceleration	1 m/s²
Deceleration	Service 1.1 m/s², emergency 1.35 m/s².
Traction system	AdTranz IGBT inverters and three phase AC Traction motors
Power output	265 kW or 355 hp per motor
Electric system(s)	1500 V DC overhead
Braking system(s)	Pneumatic and Regenerative
Safety system(s)	ATC and ATP
Gauge	1,432 mm (4 ft 8 3⁄8 in)

The A-Stock is an Electric Multiple Unit that operates on the MTR rapid transit railway system in Hong Kong. There are two variants, one used on the conventional Tung Chung Line, and a more luxurious version used on the Airport Express. The vehicle interiors were designed for MTR by Jones Garrard, while the vehicle exterior and driver's cab interior were designed by Design Triangle. These two variations are built jointly by Adtranz (acquired by Bombardier Transportation in 2001) and Construcciones y Auxiliar de Ferrocarriles and manufactured in Spain in 1996-7.

Tung Chung Line stock

Trains of the Tung Chung Line are made up of 7 cars up until 2003, and was increased to 8 cars with W car in 2003 when the West Rail Line and Nam Cheong Station was opened. TCL trains are capable of running with 8 cars in total. The total amount of cars ordered was 96.

Tung Chung Line cars
car type	driver cab	motor	pantograph	auto- coupler	length (mm)	seat	standing capacity	wheelchair space	amount
V car	✓	✓	✓	✗	24600	42	252	2	24
W car	✗	✓	✗	✗	22500	48	252	✗	24
X car (trailer)	✗	✗	✗	✓	22500	48	252	✗	24
Y car	✗	✓	✓	✗	22500	48	252	✗	12
Z car	✗	✓	✗	✓	22500	48	252	✗	12

The configuration of a TCL A Stock train is (Up track direction) V-W-X-Y-W-X-Z-V. Maximum train speed of is 135 km/h but with the Max. speed 130 km/h on service currently, maximum acceleration is 1 m/s² (3.6 km/h/s, or 2.25 MPHPS), maximum service brake rate is 1.1 m/s² (3.96 km/h/s, or 2.475 MPHPS), emergency brake has deceleration of 1.35 m/s² (4.86 km/h/s, or 3.04 MPHPS). Traction system of TCL trains is VVVF Inverter based on gate turn off thyristor (GTO thyristor) technology.

Airport Express stock

Trains of Airport Express (AEL) are made up of 7 cars up until 2003 although they can be run with 10 cars per train. The 88 cars were built and assembled by CAF in Spain while Adtranz contributed control and traction equipment. To cope with extra traffic demand derived from the opening of AsiaWorld-Expo station, one more 'F' car had been added to each train to form a total of 8 cars.

Airport Express cars
car type	driver cab	motor	pantograph	auto- coupler	length (mm)	seat	standing capacity	amount
E car	✓	✓	✓	✗	24600	60	84	11
F car	✗	✓	✗	✗	22500	64	84	22
G car (trailer)	✗	✗	✗	✓	22500	64	84	22
H car	✗	✓	✓	✓	22500	64	84	11
J car	✗	✓	✗	✓	22500	64	84	11
K car (van)	✓	✓	✓	✗	24600	13 luggage containers		11

Configuration of an AEL train is E-F-G-H-F-G-J-K. Except for K cars that have 5 doors on each side, all other cars in AEL have 2 doors on each side and 1 wheelchair space. Each passenger car is mounted with 2 LCD monitors at each end for broadcasting entertainment or turistic programmes and next-station announcement.

Maximum speed of AEL trains is 135 km/h, maximum acceleration is 1 m/s² (3.6 km/h/s, or 2.25 MPHPS), maximum service deceleration is 1.1 m/s² (3.96 km/h/s, or 2.475 MPHPS), emergency brake can deliver deceleration of 1.35 m/s² (4.86 km/h/s, or 3.04 MPHPS). Traction of AEL trains are VVVF Inverter based on GTO Thyrsitor technology.