Answer / baskaran.r

now the supply for traction is 25KV AC.connected through
pantograf. this supply is given to an onload tap changing
transformer with a secondary voltage of 800v. this through
semiconductor devices converted and applied to traction
motor. the return path is the rails through brushes in the axils

Answer / kumar

actually input supply is AC .the return path is provided in
track by using rectifier Ac converted into DC & its fed to
Input supply of DC series motor so electric train is run
by dc series motor

Answer / sushil259

25 KV single phase AC is fed from the feeding post which is
steped down by the transformer to about 600V required by DC
series motors but before feeding this voltage to DC motors
it is converted in to DC by rectifiers and filtered with
the help of choke filter.

Answer / dhinakaran.s

The 25 KV single phase AC supply is applying to the step
down transformer by the feeding post line.The return path
of the current is track line.the track line is connected to
the proper earth for the safety purpose.The stepped down AC
supply is converted to the rectified DC supply by the
rectifier, filter circuit.now the DC supply is connected to
the DC series motor.DC series motor is very suitable for
startind high torque.

Answer / s.rajesh

the railway track acts as a return path...........

Answer / gaurav

Train moves on 25kv single phase AC voltage supplied through
the catenary wire by pantograph on the roof of the train .
then it goes through converter inverter process where the
voltage is reduced and make suitable for the 3 phase
induction motors.and the track is connected is connected as
return conducter

Answer / naveen kumar sharma

generally electrical train gets supply of 25kv dc from the
above wiring in the train .in train we convert the dc to ac
by using inverter then we use the electric supply and the
return path of current is the track of rail which is
grounding...

Answer / vaiku

the train supply getting from dc power line above the
train.it will be 25kv dc voltage collecting from T type
dsl.it is two wire system one line & is train is return
path.

why does in transformer the v/f ratio constant?

2 Answers   TATA,

What will be the sampling frequency that reveals the same sampled signal?

1 Answers   CCP,

they transformer oil leakeage to beather tank and top parts . they protection relayes was not operated.what is the oil leakeage problem.

1 Answers  

What will happen if 40W and 60W Bulb is Connected in Series.

2 Answers  

Are generator action and motor action relates to a particular machine only?

2 Answers  

In n high voltage 11kv system What happened if 1 of CT cable (IDMT) loose.Will e/f or o/c trip.please explain detail

1 Answers  

we want to feed 3 phase supply to 70 ton AC load.what will be the size of (3 phase)cable require.

2 Answers   BSES,

How to test and satisfy the conditions of the vector group YNd1 for power transformer?

1 Answers   Areva,

what is the formula of high voltage testing of three phase induction motor?

1 Answers  

why the arc welding machines require parallel earthing systems? ie why each machines are connected to earth pit by separate wires during earthing? wats it adavantages?

0 Answers  

sir pls send the je exam - 2008 and other model question papers..

0 Answers  

What consists of 2 or more thermocouples to be connented series?

0 Answers