as we know that N=120f/P speed of an im can be controled only through changing no if poles, can we control by changing the frequncy????

7 Answers   JSW,

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Find active & Reactive Power transmitted in a transmisston line having Vs30 degree(sending end) to Vr(zero degree)at receving end with line inductance X ohm. Vs(30degree)-------------------Vr(zero degree) X ohm

3 Answers  

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Define stepper motor. What is the use of stepper motor?

0 Answers  

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When Alarm report at LED,Alarm volatge is 11-13 Volt But LED is of 3 volt.then why not it burn?

0 Answers  

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When in a large power system if the demand of power is larger than the generated power the frequency of the power system drops.(assume the rated frequency is 50Hz and now it is 49Hz) So does this mean the demand is totally supplied with a lower value of generated power in a lower frequency?

1 Answers  

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what is second harmonic, how is effect transformer ?.

2 Answers   DEWA,

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One 15kw motor Why we used star delta feeder?why not used DOL please explain in details

3 Answers   BMM Ispat, GSK, Pitti Laminations,

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What types of motors are used in cranes

9 Answers   BPDB, BUBT, CNH,

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one KVAR takes how much amps, and how to add power capacitors to electrical panels, for example if one of the MCC drawn 800amps means how much KVAR required

1 Answers  

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why nearly all voltages are in the multiples of 11?

5 Answers  

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Which type of transformer is used for lighting loads?

0 Answers  

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I have a 600VA numeriv digital UPS for computer only. It holds for 15 minutes only. but i am try to using home CFL Light I cant using UPS 2 or 3 secound automatic off .but computer ok how to change this is in to ups ?

1 Answers  

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