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