How is power delivered to the overhead contact system after conversion?

• A. Directly from the power grid
• B. Via wireless power transfer
• C. Via the rails and 22,000 V lines
• D. Through 1500 V feeders

Answer: (D)

The system is energized after conversion at traction substations, which change the incoming grid supply to the required traction voltage. That converted energy is then fed along the line through dedicated feeders that carry the 1500 V DC to the overhead contact wire. The train’s pantograph draws current from this wire, and the return current travels back to the substation through the rails. So, after conversion, power is delivered to the overhead contact system via 1500 V feeders, not directly from the grid, not through wireless transfer, and not via the rails as the supply path.