Answer / victorvgp

Power factor = cos(phi)
where,
phi - is the phase angle between system voltage and current.

The value of cos (phi) lies between 0 and 1

It should be maintain high, because the lower the power
factor higher the transmission losses

hence, as per the tariff we should pay penalty for lower
power factor.

In order to avoid penalty, we should maintain p.f above 0.9

r u got it.

otherwise contact me @ vgpmurthy@gmail.com

Answer / gunjan

power=VI cosX
=> I= power/(V CosX)
for low values of P.F. the current increases leading to
more copper losses (I*I*R) and hence heating. more losses
lead to low effeciency of the system as whole which is not
desirable.

Answer / rajat kumar kar

P.F.is the ratio of KWH & KVAH metering

i.e. - KWH/KVAH

It should be higher.Ideal P.F.is 90% or more

Answer / pankaj

Power factor means cosine angle between vtg & current.It also derive from Active power/apprant power(i.e.KW/KVA )
In electric power system, power factor should be more (i.e.nearly one).low power factor have more current compare to actual current.Actually Inductive load like Induction motor have a Lagging power factor which help the decreasing the power factor.Also electricity board take the penalty for low power factor.

Answer / adarsh

power factor means the ratio of real power flowing the load.
to the apparent power in the circuir,it should be high (1)
because high power factor provides good efficiency and
mostly in industries where mostly induction motors are used.


please provide me more information regarding because i have
just completed ITC

Answer / manu srivastava

power factor is cosine of the angle between V and i i.e.,
cos (phi), where phi is the angle between V an I.
power factor dends upon the circuit, weather it is
inductive,capacitive or resitive. if it is inductive p.f is
lagging i.e., i lags v.if its is capacitive, p.f. is
leading,i.e., i leads v,for resitive, v and i are in phase
with each other.

Answer / sanjay sahoo

The ratio of the actual electrical power dissipated by an AC circuit to product of the r.m.s value of current and voltage the difference between the two is caused.by reactance in the circuit and represent power that dose no usfull worked  

Answer / deepanchakravarthi

Power factor correction is most important one. Transmission and distribution lines is constant power factor maintaining in constant cost or power

Answer / vivek gupta

power factor is the cosine angle betweem voltage &
current,In my view current charges inductor coil during
induction through reactive power,so we provide capacitive
power to maintain power factor ,during this process voltage
charges capacitor so current again lead voltage and we got
good power factor .
P=VICOS (PI),WHERE VOLTAGE &POWER IS CONSTT.
IT MEANS CURRNT IS DIRECTLY RELATED TO COS(PHI)
IT MAEANS IF COS PI DEC. ,THEN CURRENT WILL INCREASE
THAT IS HARMFULL FOR OUR GEN WDG

What is meant by impedance? difference between high & low impedance ?

0 Answers  

I have 440v power coming to facility,( not being used ) can I buy large generator, (gas) to sell power back to electrical co.

0 Answers   KVF,

when we given 3 phase supply to ups system, but out put comes with 3 phase + neutral how it possible? pls explain.

3 Answers   Enzen, Juniper Networks,

Why Ferranti effect is occoured in leading power factor load in a overhead transmission line?

1 Answers  

the site measured knee point voltage of protection class CTs should be greater than rated knee point voltage? what about meetering class CTs. Should it be below the rated knee point voltage?

0 Answers  

How can we measure MVAR of a 3 phase transformer.....???

1 Answers   JLL, UPPCL,

If the Power Factor of generator is 0.85...What does this mean and Can the motors connected to this generator operate at PF more than 0.85 ?

1 Answers  

hii this is ranjith from hyd... i want to know what type of questions they ask in interview...and hw the interview will go..? what subjects thay ask specially for electrical engg students?

0 Answers  

How we can calculate the capacity the Air Condition capacity? like 1 or 1.5 ton's, What is the means of volume of Ton's in capacity of Air Compressor? Why in ton's,? not any other Volume?

2 Answers  

what is the breakdown voltage value in BDV test in transformers?

6 Answers   Siva, TATA,

why lightning arrestor are made by 2 stack of insulator but why cvt are fully 1 stack of insulator.

1 Answers  

on what priciple transformer works on?

5 Answers