Singapore’s Land Transport Authority (LTA) has awarded three contracts to upgrade the power supply and track circuit systems along the North-South and East-West Lines (NSEWL).

The first two contracts carry a combined value of S$500m ($377.7m) and were awarded to the Meiden Singapore.

The deals cover various upgrades and renewals of the NSEWL’s power supply system.

A consortium comprising Siemens and ENGIE Services Singapore was awarded the third contract, which is valued at S$73m ($55m).

"We expect the new power supply and track circuit systems to significantly reduce the number of power and track circuit related faults."

It involves a series of replacement works relating to NSEWL’s track circuit system.

LTA Infrastructure and Development deputy chief executive Chua Chong Kheng said: “We are deeply committed to improving the reliability of the NSEWL, our oldest and most heavily utilised rail lines.

“We expect the new power supply and track circuit systems to significantly reduce the number of power and track circuit related faults.”

The NSEWL’s new power supply system features Voltage Limiting Device-Fault Identification System that can isolate power faults to specific stretches in order to facilitate recovery service.

It is able to reduce the number of power-related faults by automatically switching the power source during an outage.

The system will also enable real-time monitoring and help identify potential faults along the network.

The new track circuit system can detect the location of trains on the line and the presence of broken rails.

It is also able ti use its built-in condition monitoring system to address possible track circuit failures.

Furthermore, LTA will increase the capacity of the traction substations and intake power substations at Yasin, Bishan and Stamford.

The initiative is expected to enable LTA to operate a greater number of trains on the line.

The upgrade works are scheduled to begin this year and are expected to be completed by the early 2020s.