At the starting of dc motor and syn.motor and induction motor high current flowing through the winding. Due to this the windings burnt out. To avoid this different types of starters are used. But incase of transformer what Will be used (At starting no emf is induced in the primary winding)?

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explain different types of d.c motors?

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what is the effect of back reactive power on the generator ?

0 Answers   MRF,

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What is the si unit

2 Answers  

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what is neutral grounding? why is it required? what is neutral grounding resistor and how is its value calculated??

11 Answers   NTPC, ONGC,

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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 . please reply..............

9 Answers   NTPC,

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what is transient earth voltage

2 Answers  

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Why are the HV motors are connected in star connection?

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what you have to see after one week or month from the day of installation of transformer ?

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what is the tolerance of electrical frequency for India? it's .5% or 1%?

8 Answers   Engro,

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i have need all detail above basic transformer question..

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1.how many types of relays? 2.difference between ATS& STS?

0 Answers   L&T,

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