Answer / guest

25kv AC line normally used, current collector pentograph is
used to collect current then this power transform to a lower
level(voltage) by transformer. now this power is converted to
DC and used to drive DC motors. these DC Motors drive the
train.
25 KV AC supply collected from the Grid and transmitted in the
railway grid along the tracks boosters are arranged at
different section to maintain voltage level.

the rating of fuse wire i always expressed in what?

3 Answers  

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why transformer donot allow the dc?

17 Answers   ONGC,

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why AC signals are represented by sinusoidal waveform?WHY other waveforms not used for representation

4 Answers  

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On a transformer name plate %IZ(%Impedence) is mentioned. What is the meaning of %IZ and how it is calculated?

3 Answers   Ambe Consultancy, Siemens,

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What are the major types of Curent Transformers?

2 Answers  

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Find the netid and hostid for the following classful IP addresses? i) 117.34.3.8 ii) 132.57.8.6 iii) 207.3.54.12

2 Answers   UOG,

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I Just want do EHS Certified Certification Distance Course From Govt approved,so can any body provide me details.

0 Answers  

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what is effect of leading power facter on the system and billing

0 Answers   TATA,

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any application of back emf

0 Answers   MahaGenco,

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While performing load test on DC SERIES MOTOR, does the voltage decrease slightly. Why?

2 Answers  

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What is the differance between negative dc voltage and positive dc voltage because some circuit uses -24,-5,-12,- 15,volt dc supply

10 Answers   eLab, Hero Honda, NTPC, Suzlon, Teradyne,

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I am getting differential earth fault in my transformer realy , i have checked all its CT & control wiring but do not get fault, Please help

6 Answers  

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