Alstom Metropolis C851E

The Alstom Metropolis C851E is the upcoming third generation electric multiple unit rolling stock to be introduced on the existing North East and Circle lines of Singapore's Mass Rapid Transit (MRT) system, manufactured by Alstom under Contract 851E. It consists of 6 North East line trains and 23 Circle line trains. The trains will be manufactured and assembled in Alstom's manufacturing facility in Barcelona, Spain and progressively shipped to Singapore from 2021. [lower-alpha 1][4] The contract, valued at S$249,854,305.00,[5] was awarded by the Land Transport Authority during a ceremony held at Sengkang Depot.[6] Alstom is the sole bidder for this contract.[5] Another 12 more 3-car trains will be purchased for usage on the Circle line, from 2024 onwards.[7]

Alstom Metropolis C851E
In service2024 (NEL)
ManufacturerAlstom
Built atBarcelona, Spain
Family nameMetropolis
Number under construction30 Vehicles (5 Trainsets) (NEL)
69 Vehicles (23 Trainsets) (CCL)
Number built6 Vehicles (1 Trainset) (NEL)
Formation6 per trainset (NEL)
DT–Mp–Mi+Mi–Mp–DT
3 per trainset (CCL)
Mc1-T-Mc2
Fleet numbers7087/7088 - 7097/7098 (NEL)
Operator(s)SBS Transit Ltd (ComfortDelGro Corporation)
SMRT Trains Ltd (SMRT Corporation)
Depot(s)Sengkang (NEL)
Kim Chuan (CCL)
Line(s) served NEL  North East line
 CCL  Circle line
Specifications
Car body constructionWelded Aluminium
Car length23.65 m (77 ft 7+1⁄8 in) (DT)
22.8 m (74 ft 9+5⁄8 in) (Mp/Mi) (NEL)
23.65 m (77 ft 7+1⁄8 in) (Mc)
22.8 m (74 ft 9+5⁄8 in) (T) (CCL)
Width3.2 m (10 ft 6 in)
Height3.7 m (12 ft 1+5⁄8 in)
Doors1,450 mm (57+1⁄8 in), 8 per car, 4 per side
Maximum speed100 km/h (62 mph) (NEL design)
90 km/h (56 mph) (NEL service, CCL design)
78 km/h (48 mph) (CCL service)
Traction systemIGBT–VVVF (Alstom OPTONIX)[1]
Acceleration1.1 m/s2 (3.6 ft/s2)
Deceleration1.3 m/s2 (4.3 ft/s2) (Emergency)
Electric system(s)NEL: 1,500 V DC overhead catenary
CCL: 750 V DC third rail
Current collection methodNEL: Pantograph
CCL: Contact shoe
Braking system(s)Regenerative Braking, Air Brakes
Safety system(s)Alstom URBALIS 300 moving block CBTC ATC under ATO GoA 4 (UTO), with subsystems of ATP, Iconis ATS and Smartlock CBI[2][3]
Track gauge1,435 mm (4 ft 8+1⁄2 in) standard gauge

Tender

The tender for trains under the contract C851E was closed on 2 October 2017 with Alstom being the sole bidder for this contract.[5] The LTA has shortlisted and the tender results was published.

S/N Name of tenderer Amount ($S) Offer 1[8] Amount ($S) Offer 2[8] Remarks
1 Alstom Transport S.A. / Alstom Transport (S) Pte Ltd Consortium 279,782,872.00 293,489,289.00 Offer 1 in mixed currencies; S$410,100,934.00 (Alternative in mixed currencies)

The contract 851E was awarded to the sole bidder Alstom at a cost of $250 million on 30 April 2018.[5][6]

Overview

With the new trains, the existing North East Line fleet was expanded by 14% from 43 to 49 trains and the existing Circle Line fleet increased by 17% from 64 to 75 trains. While being awarded under the same contract, trains built for the North East Line and Circle Line differ in technical specifications owing to different electrification used on both lines.

North East Line

The 6 new trains will supplement the existing C751A and C751C trains on the North East Line when the 1.7km long extension from Punggol to Punggol Coast opens in Year 2024.

The trains draw power from a 1500 V DC overhead catenary. They are fully automated (ATO GoA 4) and do not require an attendant on board. Each 6-car train (Formation: DT–Mp–Mi–Mi–Mp–DT) comprises two Driving Trailer (DT) cars at each end, and four Motor Cars (Mp and Mi). The second and fifth cars of each train (Mp) are equipped with a pantograph.

Train formation

The configuration of a C851E (NEL) in revenue service is DT-Mp-Mi+Mi-Mp-DT

Cars of C851E (NEL)
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 7x087 to 7x098, 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 087/088 consists of carriages 71087, 72087, 73087, 73088, 72088 and 71088.

  • 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, 7087/7088 (normal coupling) or 7087/7098 (cross coupling).
  • Alstom built sets 7087/7088-7097/7098.

Circle Line

The 23 new trains will supplement the existing C830 and C830C trains on the Circle Line when the 4.3km long extension from HarbourFront to Marina Bay opens in Year 2026.

The trains draw power from a 750 V DC bottom-contact third rail. They are fully automated (ATO GoA 4) and do not require an attendant on board. Each 3-car train (Formation: Mc1–Tc–Mc2) comprises two Motor Cars (Mc1 and Mc2) at each end, and an unpowered Trailer Car (Tc) in the middle.

Train formation

The configuration of a C851E (CCL) in revenue service is Mc1-T-Mc2

Cars of C851E (CCL)
car type Control Cab Motor Collector Shoe car length Wheelchair Bay
mm ft in
Mc✓✓✓ 23,650 77 ft 7.1 in✗
T✗✗✓ 22,800 74 ft 9.6 in✓

The car numbers of the trains range from 865x to 887x, where x depends on the carriage type. Individual cars are assigned a 4 digit serial number by the rail operator SMRT Trains. A complete three-car trainset consists of one trailer (T) and two driving motor cars (Mc1 & Mc2) permanently coupled together. For example, set 865 consists of carriages 8651, 8652, 8653.

  • 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 865-887.

Features

To enable a more robust maintenance regime, all the new trains are equipped with condition monitoring systems to gather data from equipment on the trains. This enables continuous monitoring of the health of the equipment and allows the operator to carry out predictive maintenance for the trains. Current collector shoe sensors on the new Circle Line trains enables the operator to react promptly and take necessary measures if any dislodgement is detected.

In addition, two of the new Circle Line three-car trains are each fitted with an Automatic Track Inspection (ATI) System, which enables monitoring of the running rails, track equipment and sleepers while the trains are in operation. The ATI System supplements existing track inspection activities for timely and more effective identification of rail and trackside components which require maintenance.[4]

Notes and references
  1. For the NEL, this was meant to be 2020, but it was since delayed to 2021 due to the COVID-19 pandemic. For the CCL, this is only expected.
  1. "Alstom to supply 34 Metropolis trains and signalling upgrade to Singapore metro". French Chamber Singapore. Archived from the original on 24 September 2015. Retrieved 9 August 2015.
  2. "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 16 June 2020. Retrieved 16 June 2020.
  3. "URBALIS Evolution: Controlling the Performance" (PDF). p. 4. Archived (PDF) from the original on 16 June 2020. Retrieved 16 June 2020.
  4. "Alstom to Supply 17 New Trains for North East Line Extension and Circle Line 6". Land Transport Authority. 30 April 2018. Retrieved 23 November 2019.
  5. "Tender information | Land Transport Authority". www.lta.gov.sg. Retrieved 2018-05-02.
  6. hermesauto (2018-04-30). "Alstom to supply 17 new MRT trains for North East Line and Circle Line". The Straits Times. Retrieved 2018-04-30.
  7. "Joint News Release by the Land Transport Authority (LTA) & SMRT - Upgrading the Circle Line in Preparation for Circle Line 6". Land Transport Authority. 25 July 2019. Retrieved 23 November 2019.
  8. "851E Schedule" (PDF). www.lta.gov.sg. Retrieved 2018-09-15.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.