Alstom Metropolis C751C

The Alstom Metropolis C751C together with the Alstom Metropolis C830C are the second 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. All 18 trainsets were delivered by 2015. The first trainset (7055/7056) entered service on 1 October that year.[5][6][7]

Alstom Metropolis C751C
Interior of C751C train
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	1 October 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 Ltd (ComfortDelGro Corporation)
Depot(s)	Sengkang
Line(s) served	NEL  North East line
Specifications
Car body construction	Welded Aluminium
Car length	23.65 m (77 ft 7 ^1⁄8 in) (Tc) 22.8 m (74 ft 9 ^5⁄8 in) (Mp/Mi)
Width	3.2 m (10 ft 6 in)
Height	3.7 m (12 ft 1 ^5⁄8 in)
Floor height	1,100 mm (43 ^1⁄4 in)
Doors	1,450 mm (57 ^1⁄8 in), 8 per car, 4 per side
Maximum speed	100 km/h (62 mph) (design) 90 km/h (56 mph)(service)
Traction system	IGBT–VVVF (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
UIC classification	2'2' + Bo'Bo' + Bo'Bo' + Bo'Bo' + Bo'Bo' + 2'2'
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[3][4]
Coupling system	Scharfenberg
Track gauge	1,435 mm (4 ft 8 ^1⁄2 in) standard gauge

Tender

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 July 2011 with 4 bids. The Land Transport Authority has shortlisted all of them and the tender results was published on 1 February 2012.[8][9]

S/N	Name of tenderer	Amount ($S)[9]
1	Alstom Transport S.A. – Alstom Transport (S) Pte Ltd Consortium	234,900,000.00[10] (Base Tender 2 - Offered in mixed currencies, and hence the differences of amount shown in the tender document.[8])
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

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 detrainment system on a C751C is also different as that of a C751A. The interior of the C751C is similar to the C751A but has redesigned gangways identical 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 than its predecessor. It is equipped with a new type of pantograph.

This North East line utilises overhead line gearboxes installed by Brecknell Willis. The difference between C751A and C751C is that there is no LCD Displays. Compared to the C751A trains, the interior roof is white instead of beige-orange.

Features

The dynamic route map display (DRMD) as used on the C751C

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.

There is also a dynamic in-train route display, which provides commuters with their route information throughout their journey, and also indicates which side the doors will open. DRMD panels are installed in these trains and it will be refurbished in 2023 to include Punggol Coast.

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, some train doors may open on the left.

Driverless operation

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.[11]

Train Formation

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. For example, 051/052 (normal coupling) or 051/070 (cross coupling).
  • Alstom Shanghai Electric built sets 051-086.

See also

• Alstom Metropolis

References

1. "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. "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. "LTA and SMRT Award Contracts for New Trains and Re-Signalling Project". Land Transport Authority. 1 February 2012. Archived from the original on 29 September 2013. Retrieved 16 November 2013.
6. "Alstom to supply 34 Metropolis trains and signaling upgrade to Singapore metro". 3 February 2012. Archived from the original on 31 December 2013. Retrieved 16 November 2013.
7. Briginshaw, David (23 July 2014). "First North East Line trains arrive in Singapore". International Railway Journal. Retrieved 1 August 2015.
8. TENDER INFORMATION - Land Transport Authority, 1 Feb 2012
9. CONTRACT 751C & 830C - Land Transport Authority
10. "LTA and SMRT Award Contracts for New Trains". Land Transport Authority. 1 February 2012. Retrieved 16 November 2013.
11. "Urbalis control system". Archived from the original on 2014-08-05.

External links

• Alstom Metropolis C751C - SGTrains
• Alstom Metropolis C751C - Land Transport Guru
• Alstom Metropolis C751C - sgWiki
• Alstom Metropolis C751C - SGBuses.com