Alstom Metropolis C830

The Alstom Metropolis C830 trains are the first generation of communication-based train control (CBTC) rolling stock to be used in Singapore’s Mass Rapid Transit (MRT) lines under the Circle line. 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.

Alstom Metropolis C830
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
Entered service	28 May 2009
Number built	120 vehicles (40 trainsets)
Number in service	120 vehicles (40 trainsets)
Formation	3 per trainset Mc1 – T – Mc2
Fleet numbers	801 – 840
Capacity	931 passengers 148 seats
Operator(s)	SMRT Trains Ltd (SMRT Corporation)
Depot(s)	Kim Chuan
Line(s) served	CCL  Circle line
Specifications
Car body construction	Welded aluminium
Car length	23.65 m (77 ft 7 ^1⁄8 in) (Mc) 22.8 m (74 ft 9 ^5⁄8 in) (T)
Width	3.21 m (10 ft 6 ^3⁄8 in)
Height	3.68 m (12 ft ^7⁄8 in)
Floor height	1,110 mm (43 ^3⁄4 in)
Doors	1,450 mm (57 ^1⁄8 in), 8 per car, 4 per side
Maximum speed	90 km/h (56 mph) (design) 78 km/h (48 mph) (service)
Weight	120 t (120 long tons; 130 short tons) (unladen) 199 t (196 long tons; 219 short tons) (fully laden)
Traction system	IGBT-VVVF (Alstom ONIX)
Power output	1.66 MW (2,230 hp)
Acceleration	1.1 m/s^2 (3.6 ft/s^2)
Deceleration	1.3 m/s^2 (4.3 ft/s^2) (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
UIC classification	Bo'Bo' + 2'2' + Bo'Bo'
Braking system(s)	Regenerative braking, air brakes
Safety system(s)	Alstom URBALIS 300 Moving Block CBTC ATC with subsystems of ATO GOA 4 (UTO), ATP, Iconis ATS and Smartlock CBI[1][2]
Coupling system	Scharfenberg
Track gauge	1,435 mm (4 ft 8 ^1⁄2 in) standard gauge

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.

These cars, although similar to their counterparts running on the North East line, do not feature LCD screens in each car, possibly due to lack of demand along Circle line[3] However, the ceiling-mounted LED dot matrix displays which display information were retained in the design.

In addition, the front of the train features an extra window cut into the emergency exit door, something lacking in the C751A trains, giving passengers a view of the tunnel.[4]

Driverless operation

The C830 is fully driverless under normal circumstances, using CBTC which does 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.[5]

Train formation

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

Cars of C830
Car type	Control cab	Motor	Collector shoe	Car length		Wheelchair bay
				mm	ft in
Mc1	✓	✓	✓	23,650	77 ft 7.1 in	✗
Mc2	✓	✓	✓	23,650	77 ft 7.1 in	✗
T	✗	✗	✓	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 four-digit serial number. A complete three-car trainset consists of one trailer (Tp) and two driving motor cars (Mc1 and 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 identifies the car number, where the first car has a 1, the second has a 2 and the third has a 3.
  • Alstom built sets 001-040.

See also

• Alstom Metropolis

References

1. "Singapore Northeast Line: will soon be the largest, fully automatic metro system in the world" (PDF). pp. 4 to 8. Archived (PDF) from the original on 16 June 2020. Retrieved 16 June 2020.
2. "URBALIS Evolution: Controlling the Performance" (PDF). p. 4. Archived (PDF) from the original on 16 June 2020. Retrieved 16 June 2020.
3. "Alstom Metropolis C830 | Land Transport Guru". Land Transport Guru. 2016-02-29. Retrieved 2017-08-13.
4. "Features | Circle Line | Projects | Public Transport | Land Transport Authority". www.lta.gov.sg. Retrieved 2017-08-13.
5. "Urbalis control system". Archived from the original on 2014-08-05.

External links

• Alstom Metropolis
• Alstom Metropolis C830 - SGTrains
• Alstom Metropolis C830 - Land Transport Guru
• Alstom Metropolis C830 - sgWiki
• Alstom Metropolis C830 - SGBuses.com