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.

WHAT IS THE DIFFERANCE BETWEEN IP54 AND IP55

2 Answers  

We operate a 10 Mw facility and we have been experiencing several trips due to fluctuations on the MVAR? We have checked all issues related to the AVR and we have found all OK? Can anyone help us? The grid voltage, internal voltage, all regular parameters look ok. MVAR fluctuate and there it goes the unit? What could be happening? Thanks!

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practicalLY what is impedence ...?

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what is the difference SCR & TRIAC?

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last week we did the REF relay test by closing single pole (R phase) of CB and apply 380V at the primary of delta transformer. we get 33A at the primary of the R phase star end. but we get 380A at both R an B in delta side. how and why?

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How does a 3 phase induction motor is started?

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