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

what will happen if the secondary of current transformer kept open....

11 Answers  

What is the meaning of C1, C61, C91 cable

0 Answers  

what is ring system ?

3 Answers   Bhel, Sabic,

how capacitor buield up the voltage

3 Answers  

At site, we have 30Kw motor (3 phase, 400V,50Hz) and FLC 54A as per the nameplate. At the time of starting it draws 840A instead of 390A (7.2%). As per the data sheet also its 390A starting current. it thru a dol starter from the MCC. can anyone tell what is the problem in the motor

5 Answers   ME,

Explain Energy and Power signals?

0 Answers   UOG,

why in electric train we can't feel current & generally we have get socked in our normal electricity ?

3 Answers  

What is dynamo function in DG sets and draw block diagram?

0 Answers   KPR Agrochem,

what is a types of short circuit and what is a types of distance protection tests

0 Answers   Anna University,

what is the highest transmission voltage in India till now?

36 Answers   Bhel, Electrical,

For polarity test on a 11/3.3kV 2.5MVA delta-star Unit Auxiliary transformer,415V 3-phase supply was applied at the HV. Connection between Aa was made with a 2.5mm cable. As soon as power was switched on the cable caught fire and burnt. This test was then abandoned. It is noteworthy to say that a similar cable was also used in a similar transformer for the same. The cable did not burn and test was successfully completed with good result. What is wrong? Please, help me out.

3 Answers  

Pls Breifly explain about UPS (Inverter,Reserve,Rectifier,Float voltage,Boost voltage).

0 Answers