Alstom Metropolis C851E
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 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. The contract, valued at around S$250 million, was awarded by the Land Transport Authority during a ceremony held at Sengkang Depot. Alstom was the sole bidder for this contract.
Tender
The tender for trains under the contract C851E was closed on 2 October 2017 with Alstom being the sole bidder for this contract. The LTA has shortlisted and the tender results was published.| S/N | Name of tenderer | Amount Offer 1 | Amount Offer 2 | Remarks |
| 1 | Alstom Transport S.A. / Alstom Transport Pte Ltd Consortium | 279,782,872.00 | 293,489,289.00 | Offer 1 in mixed currencies; S$410,100,934.00 |
The contract 851E was awarded to the sole bidder Alstom at a cost of $250 million on 30 April 2018.
Overview
North East Line
The 6 trains supplements the existing C751A and C751C trains on the North East Line for the long extension from Punggol to Punggol Coast which opened on 10 December 2024. The first train set arrived in Singapore on 4 April 2021. On 6 June 2023, a C851E was spotted testing at Potong Pasir MRT station for the first time. 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.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 2026. The first train set arrived in Singapore on 11 March 2022., the new trains have not entered service on the Circle Line.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 three-car trains are each fitted with an Automatic Track Inspection 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.
They are fully automated 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 comprises two Motor Cars at each end, and an unpowered Trailer Car in the middle.
On the North East Line, the trains draw power from an overhead catenary. Each 6-car train comprises two Driving Trailer cars at each end, and four Motor Cars. The second and fifth cars of each train are equipped with a pantograph.