Answer / k.mareeswari

Electric train uses only one conductor.It doesn,t need any
separate neutral line because rail itself acts as neutral
path or return path.
And this runs in single phase.

Answer / virendra

Addition to the above Electrical train motor is DC series
moter & runs at 25 kv , it runs on single phase & the
return path will be trhough the track which is again earth
at several places.

Answer / pavan sharma

additional in above we use negative booster to control
effect of voltage drop on rail track

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