Alstom Metropolis C851E

Alstom Metropolis C851E
The interior of the NEL C851E
The interior of the CCL C851E
Stock typeElectric multiple unit
In service
  • 28 July 2023 (2023-07-28) – Present (NEL)
  • 13 April 2026 (2026-04-13) – Present (CCL)
ManufacturerAlstom
Built atBarcelona, Spain
Family nameMetropolis
Constructed
  • 2020 – 2023 (NEL)
  • 2021 – 2025 (CCL)
Entered service
  • 28 July 2023 (2023-07-28) (NEL)[1]
  • 13 April 2026 (2026-04-13) (CCL)
Number built
  • 36 Vehicles (6 Sets) (NEL)
  • 69 Vehicles (23 Sets) (CCL)
Number in service
  • 36 Vehicles (6 Sets) (NEL)
  • 69 Vehicles (23 Sets) (CCL)
Formation6 per NEL trainset, 3 per CCL trainset
  • DT–Mp–Mi+Mi–Mp–DT (NEL)
  • Mc1–T–Mc2 (CCL)
Fleet numbers
  • 7087/7088 – 7097/7098 (NEL)
  • 8065 – 8087 (CCL)
Capacity
  • 1920 passengers (298 seats) (NEL)
  • 931 passengers (148 seats) (CCL)
Operators
Depots
Lines served
Specifications
Car body constructionWelded aluminium
Train length
  • 138.5 m (454 ft 4+3⁄4 in) (NEL)
  • 70.1 m (229 ft 11+7⁄8 in) (CCL)
Car length
  • 23.65 m (77 ft 7+1⁄8 in) (DT/Mc)
  • 22.8 m (74 ft 9+5⁄8 in) (Mp/Mi/T)
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 speed
  • 100 km/h (62 mph) (NEL design)
  • 90 km/h (56 mph) (NEL service, CCL design)
  • 78 km/h (48 mph) (CCL service)
Traction systemAlstom OPTONIX IGBT–VVVF[2]
Acceleration0.95 m/s2 (3.1 ft/s2)
Deceleration1.3 m/s2 (4.3 ft/s2) (Emergency)
Electric systems
Current collection
UIC classification
  • 2′2′+Bo′Bo′+Bo′Bo′+Bo′Bo′+Bo′Bo′+2′2′ (NEL)
  • Bo′Bo′+2′2′+Bo′Bo′ (CCL)
Braking systemsRegenerative and pneumatic
Safety systemsAlstom 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 C851E is the third generation electric multiple unit rolling stock 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 six North East Line trains and 23 Circle Line trains. The trains were manufactured and assembled in Alstom's manufacturing facility in Barcelona, Spain and progressively shipped to Singapore from 2021 for the NEL and 2022 for the CCL.[5] The contract, valued at around S$250 million, was awarded by the Land Transport Authority (LTA) during a ceremony held at Sengkang Depot.[6] Alstom was the sole bidder for this contract.[7]

Tender

The tender for trains under the contract C851E was closed on 2 October 2017 with Alstom being the sole bidder for this contract.[7] 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)

Contract 851E was awarded to the sole bidder, Alstom, at a cost of S$250 million on 30 April 2018.[7][6]


Overview

North East Line

The 6 trains supplements the existing C751A and C751C trains on the North East Line for the 1.7-kilometre (1.1 mi) long extension from Punggol to Punggol Coast which opened on 10 December 2024. The first train set arrived in Singapore on 4 April 2021.[9] On 6 June 2023, a C851E was spotted testing at Potong Pasir MRT station for the first time.[10] The first of these trains entered passenger service on 28 July 2023, and the last set entered service on 28 August 2023, increasing the NEL fleet from 43 to 49 trains in a span of just one month.[1]

Circle Line

The 23 trains supplement the existing C830 and C830C trains on the Circle Line, coinciding with the 4.3-kilometre (2.7 mi) long extension from HarbourFront to Marina Bay via Keppel, Cantonment and Prince Edward Road which all three opened on 12 July 2026. The first train set arrived in Singapore on 11 March 2022.[11] The first of these trains entered passenger service on 13 April 2026.[12]

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. Contact 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 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.[5]

They are fully automated (ATO GoA 4) and do not require an attendant on board.

On the Circle Line, the trains draw 750 V DC power from a bottom-contact third rail. 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. The interior of the Circle Line C851E remains largely consistent with its predecessor, the C830C, save for a few subtle differences such as the colour scheme of the seats, enhanced cabin lighting as well as the LED text displays being identical to the trains on the North East Line.

On the North East Line, the trains draw 1,500 V DC power from an overhead catenary. 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. The interior of the North East Line C851E remains largely consistent with its predecessor, the C751C, apart from a few subtle upgrades such as improved cabin lighting.

Automatic Track Inspection (ATI)

Four of the C851E trains also have their bogies installed with the ATI, which is a system of cameras, lasers, and sensors installed on trains that help to detect defects like rail cracks or missing fasteners.[13][14][15] The trains with ATI fitted are 7095/7096 and 7097/7098 on the NEL, as well as 8067 and one more train on the CCL.

Train formation

North East Line

The coupling configuration of a NEL C851E in revenue service is DT–Mp–Mi+Mi–Mp–DT.

Cars of C851E
Car Type Driver Cab Motor Pantograph Car Length Wheelchair Bay
m ft in
DM✓✗23.6577 ft 7.1 in✗
Mp✗✓✓22.874 ft 9.6 in
Mi✗22.874 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 7097/7098 consists of carriages 71097, 72097, 73097, 73098, 72098 and 71098.

  • The first digit identifies the line, which 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 and fifth digits identify the set number.
  • Alstom built sets 7087/7088 – 7097/7098.

Circle Line

The coupling configuration of a CCL C851E in revenue service is Mc1–T–Mc2.

Cars of C851E
Car type Quantity Driver cab Motor Collector shoe Car length Wheelchair bay
m ft in
Mc2✓23.6577 ft 7.1 in✗
T1✗✓22.874 ft 9.6 in✓

The car numbers of the trains range from 8065x to 8087x, where x depends on the carriage type. Individual cars are assigned a five-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 8065 consists of carriages 80651, 80652 and 80653.

  • The first digit identifies the line, which is always an 8.
  • The second digit is always a 0.
  • The third and fourth digits identify the set number.
  • The fifth 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 8065 – 8087.

References

  1. 1 2 "New Trains for North East Line to be Rolled Out for Passenger Service from 28 July 2023". Land Transport Authority. 27 June 2023. Archived from the original on 27 July 2023. Retrieved 27 June 2023.
  2. ↑ "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.
  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. 1 2 "Alstom to Supply 17 New Trains for North East Line Extension and Circle Line 6". Land Transport Authority. 30 April 2018. Archived from the original on 10 July 2021. Retrieved 23 November 2019.
  6. 1 2 Lim, Adrian (30 April 2018). "Alstom to supply 17 new MRT trains for North East Line and Circle Line". The Straits Times. Archived from the original on 16 November 2021. Retrieved 30 April 2018.
  7. 1 2 3 "Tender information". www.lta.gov.sg. Archived from the original on 26 July 2018. Retrieved 2 May 2018.
  8. 1 2 "851E Schedule" (PDF). www.lta.gov.sg. Archived (PDF) from the original on 15 September 2018. Retrieved 15 September 2018.
  9. ↑ "First of six new trains for North-East Line arrived in Singapore". Unscrambled.sg. 12 April 2021. Archived from the original on 5 July 2022. Retrieved 16 March 2022.
  10. ↑ "[Exclusive: Main Line Testing]SBS Transit C851E Set 7091/7092 at Potong Pasir". YouTube. 6 June 2023. Archived from the original on 9 June 2023. Retrieved 9 June 2023.
  11. ↑ "New train for Circle Line MRT arrives in Singapore; first of 23 to be shipped here". The Straits Times. 11 March 2022. Archived from the original on 14 March 2022. Retrieved 16 March 2022.
  12. ↑ Chia, Laura (11 April 2026). "'For the record, it's orange, not yellow': LTA unveils new Circle Line trains in signature colour". The Straits Times. Retrieved 11 April 2026.
  13. ↑ "Six new trains added to the North-East Line from Jul 28". CNA. Retrieved 8 May 2026.
  14. ↑ "Factsheet: Technology for Depots and Trains to Improve Rail Reliability". Land Transport Authority. 13 November 2017. Archived from the original on 17 February 2020. Retrieved 17 February 2020.
  15. ↑ "New train for Circle Line MRT arrives in Singapore; first of 23 to be shipped here". The Straits Times. 11 March 2022. ISSN 0585-3923. Retrieved 8 May 2026.
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