Answer / shalini.b

Power factor is the cosine of angle between voltage &
current.i.e cos(phi)
or
It is the ratio of Active power to reactive power
cos(phi)=KW/KVA

Answer / suhas yeole

it is the ratio of active power to the apperent
power,i.e. cos(Q)=kw/kva

Answer / bijay

To Chetan,
Suppose u got 80 out 0f 100 in an exam.
this means u r at a pf of 0.8, the class topper got 95, so
his PF is 0.95.

Now note that KVA is ur total marks(100)
and KW is what u scored.

now its simple pf=kw/kva

Answer / sudheer

Mr.bijay you are good explainer.
please share this knowledge to every-body.

Answer / mehdi

In the above:

cos(phi)=PF= KW/KVA formula is correct.

but KVA is apparent power not reactive power.

KVA= V*I ,
KW=V*I*cos(phi) ,
KVAR= V*I*sin(phi)

KVA=apparent power=Sqrt(KW*KW + KVAR*KVAR)

Answer / anusree

Efficiency of utilisation of a power supply, higher the pf
better is the efficiency, pf is the ratio of active power
to reactive power

why is the transmission voltage is multiple of 11?

4 Answers  

WHAT SHOULD BE THE RATING OF generator required to run a pump motor of 45 Kw.

1 Answers   Jauss Polymers,

What are the industrial applications of Superhetrodyne Receivers ? What are merits & De-merits of SuperHeterodyne Receivers ?

1 Answers   Airtel,

Draw a block diagramof Three UPS systems connected in Parallel mode?

0 Answers   HSL,

What are the conditions for sustained oscillator or what is backhouse criterion?

0 Answers  

Explain about 3 phase motor fault current calculation with examples?

0 Answers   QTC,

What is meant by vector group

0 Answers   GPSC Gujarat Public Service Commission, VA Tech Wabag,

Yazaki india pvt ltd interview questions qurey related

0 Answers  

While starting a high capacity motor, it takes 6 times the full load current. Why it doesn't trip relay or CB's in that network?

4 Answers  

Whats the principle of lightning? How protection against lightning is achieved? Types of protection? How to select the height of lightning spike? as per the area.

4 Answers   HAL,

What are reasond for high wattage in single phase induction motors

0 Answers  

whay we transmit power in 3phase no in 4 or 2 or 5......etc?

4 Answers   CCCL,