Answer / harish

the power factor can be presented practically
by drawing the phasor diagram...it is the angle between the
voltage and current....the positive direction is assumed i.e
either cc or acc.....

Answer / satya

power factor is the ratio of p and vi so we can take the
gralph between p and vi and slope of that gives us p.f

Answer / yuvraj

PF= 1/ROOT(1+THD2)

Answer / moti rgpv

TO MEASURE PF PF-METER IS USE.DRAW ANGLE B/W PF AND TIME

what is meant by reactive power ?

5 Answers  

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without any excitation we can strt any dc or ac moter?

6 Answers   Bhel,

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What is the deffirant between EARTH, GROUND AND NUTRAL

4 Answers   TCS,

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why 3 phase is converted into 2 phase using electronics circuit why not 2 phases are diresctly putted from the 3 phase transformer??

0 Answers   Descon,

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I want to know that a 160kva diesel generator contains capacity of 160kva on each phase like R=160 Y=160 B=160 total RYB=480kva or it is total capacity of all there phases like RYB=160kva ... thanks in advance ...

2 Answers   jlpl, JP Saraswat Engineers,

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How do we calculate the out Put voltage of generator, after excitation being given?

2 Answers  

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What is Isolation Current transformer and what purpose to use it in REF relay ?

1 Answers  

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I have a question, I visit 01 site and face a problem, there is 2.5 ton Air Con working, when air con compressor is running at that time rectifier voltages are increasing upto 290-295 v and rectifier is giving main high alarm (rectifier is APC single phase), before starting compressor rectifier voltages was 230v. when air con is going off rectifier voltages are decreasing smoothly at its actual voltages 230v. Load on Genset phases is this: Red-13.5 amp AC (Air Con load), Yellow-1.7 amp AC (BTS lights etc.) and Blew-4 amp AC (telecom system load), Genset phase to phase and neutral to phase voltages are also ok. These are 10 sites having same system and same rectifier APC brand at every site 02 genset are working but the problem is same at all these 10 sites. What will be the reason behind???

1 Answers  

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why ht motor connection in star

10 Answers   Suzlon,

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How many 2 ton window A/c can runs on a 125 KVA generator?

3 Answers  

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Hi, We facing one similar problem in our computers i.e we are newly constructed our design department after that shifted our computers but our computer desktop screen is vibrating. we are conducted our electrical maintainance person he told that is UPS problem, then we changed the UPS also again we are facing that problem in that room only. then we put lcd monitors that problem is solved. But in other monitors why the computer desktop screen is vibrating please give a suggestion to me. Regards, Raju.N.G

10 Answers  

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Explain the different regions in frequency response?

0 Answers  

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