why the field winding of synchronous machine is excited by dc source

2 Answers  

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what is v/f control in VFD?

0 Answers  

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why t/f are rated in kva. is it conserned with p.f.

3 Answers  

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our plant maximum demand has 500 kva.need to suggest me to maintained pf 0.98.how much capacitor bank will be connect to the supply line.

1 Answers  

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How to arrange a hous hold earthing system to keep minimum earth resistance( below 7ohms).

0 Answers  

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For 300MW and over a distance 250 km, what voltage be selected? and no. of circuit?

5 Answers   DPL, NTPC,

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what is the difference between earth and neutral?

56 Answers   Bhel, Emerson, HCL, JLL, L&T, Siemens, TVS,

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What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer?

0 Answers  

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Which is the best between SCADA & PLCC & Why ?

2 Answers   ABC,

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Draw the wave shape of armature current in a generator subjected to a sudden three phase short- circuit at its terminals. Define various reactance of generator from this wave shape.

0 Answers   VECL,

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have u any web site who can give all electrical sum's to solve counting easy like how to convert 1kw=?Kva.

1 Answers   Marriott,

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what are eddy currents

2 Answers  

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