Can u explain : what is supply for train (whether a,c or d.c ).I know that supply is 25000v a.c .But there is rumour that supply is D.C. And also explain how lights and fans inside the trains are working ,and what type of motors are used in trains whether D.C motors or induction motors .If d.c motor, how it gets supply.If traction motors are used then what are traction motors and its functions and how it differs from other motors and also explain about locomotive . y d.c series motor in train.train wheels r driven by D.C shunt motor ,at what voltage,and at what speed. please reply..............

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what is the function of fire alarm system?

5 Answers  

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in general it is observed in power stations, the tertiary winding is used in higher rating Y-Y auto transformer but not in Y-Y power transformer. is the tertiary winding is compulsory then why it is not using in power transformer 

0 Answers  

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What is the difference between automatic & semi-automatic star-delta starters?

3 Answers  

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What are protections for dty type transformers

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Trafo ratio is 11kV/6.6kv,Vector group is YND11. What will be the effect if secondary is used for earthed system.

0 Answers  

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what are iron and copper losses

4 Answers  

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how many amps in 1 KVA? V=440v, PF=0.8 and FREQ=50Hz

22 Answers  

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What is the difference between earthed and unearthed cable

5 Answers   FT, L&T, Suzlon,

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Compare jfet’s and mosfet’s.

0 Answers  

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What can a fresh(without experience) electrical engineer contribute to NTPC( Or any PSU company) growth?

3 Answers   NTPC,

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What is RTCC in a transfomer and specify its function.

11 Answers   MCB, Vodafone,

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