Alstom Metropolis & Shanghai Electric C751C

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Alstom Metropolis & Shanghai Electric C751C
C751C-Interior.JPG
In service 1 October 2015 - present
Manufacturer Shanghai Alstom Transport
(Alstom and Shanghai Electric)[1]
Built at Shanghai, China
Family name Metropolis
Constructed 2014–2016
Entered service 2015
Number built 108 Vehicles (18 Trainsets)
Number in service 108 Vehicles (18 Trainsets)
Formation 6 per trainset
DT-Mp-Mi-Mi-Mp-DT
Fleet numbers 7051/7052 ~ 7085/7086
Capacity 1920 passengers (320 per car)
Operator(s) SBS Transit
Depot(s) Sengkang
Line(s) served North East Line
Specifications
Car body construction Welded Aluminium
Car length 23.65 m (77 ft 7 18 in) (Tc)
22.8 m (74 ft 9 58 in) (Mp/Mi)
Width 3.2 m (10 ft 6 in)
Height 3.7 m (12 ft 1 58 in)
Floor height 1,100 mm (43 14 in)
Platform height (?)
Doors 1,450 mm (57 18 in), 8 per car
Maximum speed 100 km/h (62 mph) (design)
90 km/h (56 mph) (service)
Traction system IGBTVVVF
(Shanghai Alstom Electrical Equipment OPTONIX)[2]
Traction motors Three-phase AC induction motor
150 kW (200 hp)
Power output 2.4 MW (3,200 hp)
Electric system(s) 1500 V DC overhead catenary
Current collection method Pantograph
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
Track gauge 1,435 mm (4 ft 8 12 in) standard gauge

The Shanghai Alstom Metropolis C751C together with the Alstom Metropolis C830C are the third generation of communication-based train control (CBTC) rolling stock to be used in Singapore’s Mass Rapid Transit (MRT) lines. 18 trainsets of 6 cars were manufactured by Shanghai Alstom Transport Co Ltd (joint venture of Alstom and Shanghai Electric),[1] Deliveries began in July 2014 and is expected to continue through 2015.[3][4][5]

As of 1 October 2015, the first trainset (7055/7056) has been deployed for service.

Tender[edit]

The tender for trains under the contract 751C was opened together with another contract C830C for an additional 24 Circle Line trains which was closed on 18 Jul 2011 with 4 bids. The Land Transport Authority has shortlisted all of them and the tender results was published on 1 Feb 2012.[6][7]

S/N Name of tenderer Amount ($S)[7]
1 Alstom Transport S.A. – Alstom Transport (S) Pte Ltd Consortium 234,900,000.00[8] (Base Tender 2 - Offered in mixed currencies, and hence the differences of amount shown in the tender document.[6])
2 Hyundai Rotem 284,954,400.00 (Base Tender 2)
3 Construcciones Y Auxilliar De Ferrocarriles, S. A. 234,443,494.80 (Base Tender 2)
4 CSR Zhuzhou Electric Locomotive Co., Ltd. 245,076,923.08 (Base Tender 2)

Design[edit]

Externally, the C751C shares similarities with its predecessor, the Alstom Metropolis C751A in terms of shape, color and appearance, but has an additional window on the detrainment doors located at the ends of the train, allowing passengers to see the tracks ahead. The interior of the C751C is similar to the C751A but has redesigned gangways similar to those on the C830C. The seat colours are similar to the Bombardier MOVIA C951 and C801A, having a purplish tint. Priority seats can be identified by their red colouration. The C751C has a dynamic route-map system, similar to the C830C and C951. It also has a louder and higher-pitched propulsion system, which sounds similar to the propulsion system of C151 trains. It is equipped with a new type of current collector.

This line uses Overhead Lines, therefore overhead line gearboxes are installed. During peak hours, SBS Transit staff may be deployed on the trains, hence passengers can only view the tracks through the emergency exit window. The difference between C751A and C751C is that there is no LCD Displays. Compared to the C751A trains, the interior roof is coloured white instead of beige-orange.

Features[edit]

It features a Visual Passenger Information System, letting commuters know what the current and next station is, as well as green blinking lights which indicate the side of which the train doors will open when the train reaches the station. At most stations on the North East Line, the train doors will open on the right side, but at terminus stations like Punggol and HarbourFront, doors may open on the left.

Driverless operation[edit]

The C751C 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 railroad 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.[9]

Train Formation[edit]

The configuration of a C751C in revenue service is DT-Mp-Mi-Mi-Mp-DT

Cars of C751C
car type Control Cab Motor Pantograph car length Wheelchair Bay
mm ft in
DT 23,650 77 ft 7.1 in
Mi 22,800 74 ft 9.6 in
Mp 22,800 74 ft 9.6 in

The car numbers of the trains range from 7x051 to 7x086, where x depends on the carriage type. Individual cars are assigned a five-digit serial number by the rail operator SBS Transit. A complete six-car trainset consists of an identical twin set of one Driving trailer(DT) and two motor cars(Mi & Mp) permanently coupled together. For example, set 051/052 consists of carriages 71051, 72051, 73051, 73052, 72052 and 71052.

  • The first digit is always a 7.
  • The second digit identifies the car number, where the first car has a 1, the second has a 2 & the third has a 3.
  • The third digit is always a 0.
  • The fourth digit and fifth digit are the train identification numbers. A full length train of 6 cars have 2 different identification numbers, one for the first 3 cars, and the same number plus 1, for the other three.

See also[edit]

References[edit]

  1. ^ a b "Driverless trains delivered to Singapore". Railway Gazette. 23 July 2014. Retrieved 1 August 2015. 
  2. ^ "Alstom to supply 34 Metropolis trains and signaling upgrade to Singapore metro". French Chamber Singapore. Retrieved 9 August 2015. 
  3. ^ "LTA and SMRT Award Contracts for New Trains and Re-Signalling Project". Land Transport Authority. 1 February 2012. Retrieved 16 November 2013. 
  4. ^ "Alstom to supply 34 Metropolis trains and signaling upgrade to Singapore metro". 3 February 2012. Retrieved 16 November 2013. 
  5. ^ Briginshaw, David (23 July 2014). "First North East Line trains arrive in Singapore". International Railway Journal. Retrieved 1 August 2015. 
  6. ^ a b TENDER INFORMATION - Land Transport Authority, 1 Feb 2012
  7. ^ a b CONTRACT 751C & 830C - Land Transport Authority
  8. ^ "LTA and SMRT Award Contracts for New Trains.". Land Transport Authority. 1 February 2012. Retrieved 16 November 2013. 
  9. ^ "Urbalis control system".