Answer / manesh.k

Actually,it is good to refer it as Phase & neutral
itself,since,as per Indian railways we use 25kV,1 phase ac
system.The terminal at top ie called panthograph takes power
in to loco and track acts as neutral

Answer / chandru_williams

The track acts as negative path. the circuit closes in the
track.

Answer / rasiklal

Dear Ram,
In train return path for current is track only nothing else.
and in india we are using the same system for Electric
traction system. if you dont think so, so we can not change
the return path of current, pls chage your thinking ok

thanks,
WRB Engineer
Rasik Savaliya(GM)

Answer / yokesh

the nagative is track @ the train coming time some
induction was produced that induction was recived by the
booster transformer,

Answer / sujit ril

Dear Ramniveth,

For ur kind information, in a AC transmission line one is
phase and one is nutral so when we connct both current
flows from phase to nutral, hence it completes a path for
current to flow. As same consideration in Train transmission
lines, the above line provided is a phase now we need a
nutral to collect the current from phase and to make that
path complete . So here we r using the rail track as nutral
hence the current flows to the track and than to earth which
makes a complete path for current to flow. i think ur
question might be having ans now.

Answer / ghanshyam singh

it is right that the track itself acts as the return path for the current.
now what happen when u touch the railway track is "let me remind u that current always follows the path having minimum resistance" and the resistance of ur body will always b > the track

so u did't feel the shock.
ok

Answer / ramniveth

manish i agree with your answer

Answer / ramniveth

can i measure the nagative voltage with respect to earth
Mr.Chandru williams.
if yes i will get shock when i touch the track

Answer / shashank

Dear All,

Not all traction systems work on AC supply. Wherever there
is a DC supply used, the return path is providedby the
earth i.e. the ground. Now comming to the vasics of
electrical engineering, Voltage is a unit for the Potential
diference (PD). PD itself says that there needs to be a
difference in the potential of both the electrodes for the
current to flow. It is not only that if the OHE has +ve
potential the system will work but even if the OHE has -ve
potential then also the system will work as automatically
the earth becomes the +ve eletrode.

But Indian railway uses +ve supply with referance to the
earth, hence we dont ger a shock as already the potential
is zero.

Whereas the AC Supply is concerned i agree to what manesh
has said. with the only addition that the neytral is
grounded i.e. earthed.

Shashank

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