Answer / rams dharavath

The direction and magnitude flux of d.c coil remaining the same.DC coils give accurates and better lifting magnets and DC coils having no hystrises losses and heating problems.

Answer / kannan

While we will use ac supply for HV and Relays following
disadvantages are available.

1.Tripping feedback can not see.
2.ac source is variable source.

What is the difference between security constraint unit commitment and security constraint optimal power flow?

0 Answers   College School Exams Tests,

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what is the difference between arc and spark

2 Answers   ABB, Jindal,

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1. what is the meaning of bus? 2. what is the dc transformer? How it work 3.what is the function of the serge absorber? 4.How the CT and PT rating calculate/

1 Answers  

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When Neutral exceeds or equals the phase current in both single phase * three phase system?

1 Answers  

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what is wave traps and why it is been used in switchyards?

1 Answers   NHPC,

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What is genrally the % Impedance of a Dg set? How can we calculate Earthing conductor size for a DG set?

0 Answers  

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How to decrease or increase the range of voltmeter? can an ammeter be used to measure voltage? can a wattmeter used as voltmeter and ammeter?

3 Answers  

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Explain Need of a starter in a dc motor.? Also explain any two starting and speed control method of dc motor?

0 Answers  

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What does negative slip of an induction motor signify?

10 Answers   Tata Elxsi,

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wts d diff b/w C.T. & P.T.?

9 Answers  

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why swinburnes test cannot be performed on series machines?explain

0 Answers  

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Starting current of a 10 HP induction Motor is ______ time’s full load current.

0 Answers  

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