Alstom Metropolis C830

Alstom Metropolis C830
Interior of the Alstom Metropolis C830 on the Circle Line.
In service 28 May 2009 (2009-05-28) – Present
Manufacturer Alstom
Built at Valenciennes, France
Family name Metropolis
Constructed 2006–2008
Entered service 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
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
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 Moving Block 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 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.

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[1] However, the ceiling-mounted LED dot matrix displays which display information was 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.[2]

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.[3]

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 4 digit serial number. 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 identifies the car number, where the first car has a 1, the second has a 2 & the third has a 3.
Door of Alstom Metropolis C830

See also

References

  1. ↑ "Alstom Metropolis C830 | Land Transport Guru". Land Transport Guru. 2016-02-29. Retrieved 2017-08-13.
  2. ↑ "Features | Circle Line | Projects | Public Transport | Land Transport Authority". www.lta.gov.sg. Retrieved 2017-08-13.
  3. ↑ "Urbalis control system". Archived from the original on 2014-08-05.
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