Power Supply Installation Work

25 kV, AC, 50 Hz single phase power supply for electric traction is derived from the grid of State Electricity Boards through traction sub-stations located along the route of the electrified sections at distance of 35 to 50 km apart. The distance between adjacent substations may however be even less depending on intensity of traffic and load of trains

1. The Supply Authorities supply power at 220/132/110/66 kV Extra High Voltage (EHV) at each traction substation which is owned, installed, operated and maintained by the Railways.

2. The Railway receives 3-phase power supply from the supply Authority at a single point near the grid substation from where the Railway runs its own transmission lines providing its own traction sub-stations.

3. All EHV and 25 kV equipment is owned, installed, operated and maintained by the Supply Authority except 25 kV feeder circuit breakers which are owned, installed, operated and maintained by the Railway.

4. All EHV and 25 kV equipment is owned, installed, operated and maintained by the Supply Authority but 25 kV feeder circuit breakers alone are operated on remote control by the Traction Power Controller (TPC).