Alstom Metropolis C830

Operational history and overview

Despite being similar to the fully underground North East Line, the decision was made to power the three-car trains along the Circle Line by third rail instead of overhead catenary. 40 trainsets of three cars each were purchased for the Circle Line. For the train's tender, Alstom was awarded the contract on 28 December 2000, beating seven pre-qualified contractors.

The front of the train features an extra window cut into the emergency exit door unlike the C751A trains, giving passengers a view of the tunnel.

Interior

The interior of the C830 trains depending on the car, each car features white and grey interior walls or doors, and the shades purple, blue and green seats.

Driverless operation

The C830 is fully driverless under normal circumstances, using CBTC which does 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 railway 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.

Train formation

The coupling configuration of a C830 in revenue service is Mc1–T–Mc2.

The car numbers of the trains range from 801x to 840x, where x depends on the carriage type. Individual cars are assigned a four-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 801 consists of carriages 8011, 8012 and 8013.

• 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 801 – 840.

References

References

1. "Alstom Motors Catalogue 2015 – English". [[Alstom]].
2. "Alstom Bogies Catalogue 2015 – English". [[Alstom]].
3. "Singapore Northeast Line: will soon be the largest, fully automatic metro system in the world".
4. "URBALIS Evolution: Controlling the Performance".
5. (28 December 2000). "Award of Electrical and Mechanical Systems Contract 830 for the Marina Line".
6. "Features {{!}} Circle Line {{!}} Projects {{!}} Public Transport {{!}} Land Transport Authority".
7. "Urbalis control system".