Alstom Metropolis C830
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Alstom Metropolis C830
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Interior of the Alstom Metropolis C830 on the Circle Line.
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| In service | 28 May 2009 – 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 Trains (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 |
| 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) 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.
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 North East Line 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 as the train speeds through.
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.
The configuration of a C830 in revenue service is Mc1-Tp-Mc2
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.
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Wikipedia