Alstom Metropolis C830

Not to be confused with Alstom Metropolis & Shanghai Electric C830C.

Alstom Metropolis C830
Alstom Metropolis C830 trains in Kim Chuan Depot.
Interior of the Alstom Metropolis C830 on the Circle Line.
In service	28 May 2009– Present
Manufacturer	Alstom
Built at	Valenciennes, France
Family name	Metropolis
Constructed	2006–2008
Number built	120 (40 train sets)
Formation	3 per trainset Mc1– T –Mc2
Capacity	931 passengers 148 seats
Operator(s)	SMRT Trains (SMRT Corporation)
Depot(s)	Kim Chuan
Line(s) served	Circle Line
Specifications
Car body construction	Welded aluminium
Car length	(Mc) (T)
Width
Height
Floor height
Doors	, 8 per car
Maximum speed	90 km/h (56 mph) (design) 78 km/h (48 mph) (service)
Weight	35 t (34 long tons; 39 short tons)
Traction system	IGBT-VVVF (Alstom ONIX)
Power output	1.66 MW (2,230 hp)
Acceleration	1.1 m/s2 (3.6 ft/s2)
Deceleration	1.3 m/s2 (4.3 ft/s2) (Emergency)
Power supply	Three-phase AC induction motors 150 kW (200 hp)
Electric system(s)	750 V DC third rail
Current collection method	Collector shoe
Braking system(s)	Regenerative Braking, Air Brakes
Safety system(s)	Alstom URBALIS 300 CBTC ATC with subsystems of ATO GOA 4 (UTO), ATP, Iconis ATS, Smartlock CBI
Track gauge	1,435 mm (4 ft 8 1⁄2 in) standard gauge

The Alstom Metropolis C830 trains are the second generation of communication-based train control (CBTC) rolling stock to be used in Singapore’s Mass Rapid Transit (MRT) lines. Alstom was contracted in 2000 (as part of turnkey contract Contract C830) by the Land Transport Authority (LTA) in Singapore to supply the trains for the Circle Line.

Overview

Despite being similar to the fully underground North East Line, the decision was made to power the three-car trains along the Circle Line by third rail instead of overhead catenary. 40 trainsets of three cars each were purchased for the Circle Line. LTA says that they will be adding 24 new trains instead of 16 trains to the Circle Line by 2015.

These cars, although similar to their counterparts running on the North East Line, do not feature LCD screens in each car. Also, the front of the train features an extra window cut into the emergency exit door, something lacking in the C751A trains. In addition, due to its driverless configuration, there are windows at the front and back of the train, giving passengers a view of the tunnel as the train speeds through.

Driverless operation

The C830 is fully driverless under normal circumstances, using CBTC which do not require traditional "fixed-block track circuits" for determining train position. Instead, they rely on "continuous two-way digital communication" between each controlled train and a wayside control center, which may control an area of a railway line, a complete line, or a group of lines. Recent studies consistently show that CBTC systems reduce life-cycle costs for the overall rail property and enhance operational flexibility and control.

Train formation

The configuration of a C830 in revenue service is Mc1-Tp-Mc2

Cars of C830
car type	Driver Cab	Motor	Collector Shoe	car length		Wheelchair Space
				mm	ft in
Mc1	✓	✓	✓	23,650	77 ft 7.1 in
Mc2	✓	✓	✓	23,650	77 ft 7.1 in
Tp	✗	✗	✓	22,800	74 ft 9.6 in

The car numbers of the trains range from 801x to 840x, where x depends on the carriage type. Individual cars are assigned a 4 digit serial number by the rail operator SMRT Trains. A complete three-car trainset consists of one trailer(Tp) and two driving motor cars(Mc1 & Mc2) permanently coupled together. For example, set 840 consists of carriages 8401, 8402 and 8403.

• The first digit is always an eight.
• The second digit and third digit identifies the set number
• The fourth digit is the car number.
  • Alstom built sets 801-840

Door of Alstom Metropolis C830

See also

• Alstom Metropolis

External links

• Alstom Metropolis