why dc supply is given to the field of alternator

9 Answers  

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Why the steam turbines are run at high speed where as the hydro turbines are run at low speed?

1 Answers  

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what is bjt & mosfet? what is rectifier & diode?

1 Answers  

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where would be tap changer in transformer & why?

2 Answers   Kentz,

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HOW TO CALCULATE BATTERY BACKUP TIME & AH CAPACITY AGAINST UPS KVA RATING?

2 Answers  

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suppose a fan is running with phase and neutral. if its neural is touched to body. then fan get stopped. if this fan is connected to phase and ground supply..then why it runs?

1 Answers  

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what is a bus post insulator? explain its application in a substation.

1 Answers   Enercon, HAL,

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what is the difference between E.L.C.B & R.C.C.B?

2 Answers  

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What is the use for cable entry in control room?

0 Answers  

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why capacitor rating measure in KVAR. ?

2 Answers  

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Why are iron cores in transformers made laminated?

0 Answers  

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How we select the cable rating

1 Answers   BTM, Videocon,

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