Why AC & DC capacitor are use in UPS ??????????????????

0 Answers   Sanghi,

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Why reactive power is needed in a power system? How is it being absorbed or delivered by alternators? For reactive power control we are changing excitation but reactive power absorbing or delivering related to stator. How these two are interlinked? i want a detailed explanation with necessary expressions and figures?

0 Answers   Power Plant,

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WHY WE ARE DOING THE EARTHING IN A SYSTEM. SOME PEOPLE ARE TELLING FOR PROTECTION. WHAT PROTECTION GIVE ME THE CORRECT ANSWER.

2 Answers  

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Why rotating machines are not allowed to run near critical speed region?

2 Answers  

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if our load in 3 phase circuit is 4000 amp. calculate the capacity of capacitor panel if line power factor is.80 .

1 Answers   ST Micro,

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why transformer rating is expressed in kva.

4 Answers   Electrosteel, L&T,

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what do you understand by dressing a HT/LT pole

1 Answers   Federal Polytechnic Nekede,

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which type of material is used for making motor encloser

3 Answers  

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in small capacitor we use uf( micro farad) and in big quantity we used kvar. i want to know that in 1 kva how much will b uf(micru farad).

2 Answers  

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what is the difference between line & phase current in star delta connection motor?

2 Answers  

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how to select automotive wire by mathematical equation with given current, vlotage and resistance

0 Answers   Tyco,

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why the transformer primary and secondary windins vector groups vary? why it is something like Dy11 and not as Dy or Yy...

2 Answers  

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