Alstom Metropolis C830
C830 trains at Kim Chuan Depot
Interior of the Alstom Metropolis C830 on the Circle line
In service28 May 2009 (2009-05-28) – present
ManufacturerAlstom
Built atValenciennes, France
Family nameMetropolis
Constructed2006 – 2008
Entered service28 May 2009 (2009-05-28)
Number built120 Vehicles (40 Sets)
Number in service120 Vehicles (40 Sets)
Formation3 per trainset
Mc1–T–Mc2
Fleet numbers801 – 840
Capacity931 passengers
148 seats
OperatorsSMRT Trains Ltd (SMRT Corporation)
DepotsKim Chuan
Lines served CCL  Circle line
Specifications
Car body constructionWelded aluminium
Train length70.1 m (229 ft 11+7⁄8 in)
Car length
  • 23.65 m (77 ft 7+1⁄8 in) (Mc)
  • 22.8 m (74 ft 9+5⁄8 in) (T)
Width3.21 m (10 ft 6+3⁄8 in)
Height3.68 m (12 ft 7⁄8 in)
Floor height1,110 mm (43+3⁄4 in)
Doors1,450 mm (57+1⁄8 in), 8 per car, 4 per side
Wheel diameter850–775 mm (33.5–30.5 in)[1]
Wheelbase2.5 m (8 ft 2 in)[1]
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)
Axle load16 t (16 long tons; 18 short tons)[1]
Traction systemAlstom ONIX IGBT–VVVF
Traction motors8 × Alstom 4LCA 2138[2] 150 kW (200 hp) asynchronous 3-phase AC
Power output1.2 MW (1,600 hp)
Acceleration1.1 m/s2 (3.6 ft/s2)
Deceleration1.3 m/s2 (4.3 ft/s2) (Emergency)
Electric system(s)750 V DC third rail
Current collector(s)Collector shoe
UIC classificationBo′Bo′+2′2′+Bo′Bo′
BogiesAlstom B25[1]
Braking system(s)Regenerative and pneumatic
Safety system(s)Alstom URBALIS 300 moving block CBTC ATC under ATO GoA 4 (UTO), with subsystems of ATP, Iconis ATS and Smartlock CBI[3][4]
Coupling systemScharfenberg
Track gauge1,435 mm (4 ft 8+1⁄2 in) standard gauge

The Alstom Metropolis C830 is the first generation of communication-based train control (CBTC) electric multiple unit rolling stock in operation on the Circle line of Singapore's Mass Rapid Transit (MRT) system since 2009. 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.

Operational history and 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. For the train's tender, Alstom was awarded the contract on 28 December 2000, beating seven pre-qualified contractors.[5]

The front of the train features an extra window cut into the emergency exit door unlike the C751A trains, giving passengers a view of the tunnel.[6]

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.[7]

Train formation

The coupling configuration of a C830 in revenue service is Mc1–T–Mc2.

Cars of C830
Car Type Quantity Driver Cab Motor Collector Shoe Car Length Wheelchair Bay
m ft in
Mc2✓✓✓23.65 77 ft 7.1 in✗
T1✗✗✓22.8 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 by the rail operator SMRT Trains. A complete three-car trainset consists of one trailer (T) and two driving motor (Mc) cars permanently coupled together. For example, set 801 consists of carriages 8011, 8012 and 8013.

  • The first digit is always an 8.
  • The second and third digits identify 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 801 – 840.

References

  1. 1 2 3 4 "Alstom Bogies Catalogue 2015 – English" (PDF). Alstom. Archived from the original (PDF) on 21 September 2015. Retrieved 4 November 2023.
  2. ↑ "Alstom Motors Catalogue 2015 – English" (PDF). Alstom. Archived from the original (PDF) on 27 June 2018. Retrieved 4 November 2023.
  3. ↑ "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 15 June 2020. Retrieved 16 June 2020.
  4. ↑ "URBALIS Evolution: Controlling the Performance" (PDF). p. 4. Archived (PDF) from the original on 15 June 2020. Retrieved 16 June 2020.
  5. ↑ "Award of Electrical and Mechanical Systems Contract 830 for the Marina Line". LTA. 28 December 2000. Archived from the original on 1 July 2001. Retrieved 29 May 2022.
  6. ↑ "Features | Circle Line | Projects | Public Transport | Land Transport Authority". www.lta.gov.sg. Archived from the original on 2017-08-13. Retrieved 2017-08-13.
  7. ↑ "Urbalis control system". Archived from the original on 2014-08-05.
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