Question

What are the advantage of 25 kv ac system of track electrification over dc system ​

Answer 1

Answer:

Less number of sub stations

The distance between two sub stations due to 25 kV is approximately 50 – 80 km as against 5 – 15 km for 1500 V DC and 15 – 30 km for 3000 V DC system. As the number of sub stations is reduced, the capital cost of track electrification is also reduced.