What is effect of power factor on change in voltage

Answer Posted / balla

P=V*I*P.F
P.F=P/S
S=V*I
where P is power in KW and S is appearant power in KVA,
when V change while P remain the same it will decrease the
cureent and vice versa, so there is no affect on P.F , the
real affect on P.F is when there is change on power demand
either real or reactive.
If the voltage change can affect P.F why we dont use this
philosophy on P.F correction !.

Is This Answer Correct ?    23 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

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?

1639


Explain what is electric traction? Explain few advantages of electric traction system?

615


which book to refer in electrical engineering for iocl exam & which book for general english.

1770


how to find number of run cable laying[LT side] for transformer & alternator secondary side? [above condition for getting output power transformer to main panel side] give the example.

1603


What are the uses of stepper motor?

725






Why does the speed regulating system adopting I controller have no steady-state error? In this single closed-loop speed regulating system, when the input of the I controller Un=0, what is the output voltage of the regulator? What factors do the output voltage depend on?

1424


how copper and aluminium wires or cables are choose for current rating? please provide copper and aluminium wire selection chart for different current rating ?

1580


how power is generated,and transmitted to our home..pls explain briefly in simple words.

1786


Why is back emf used for a DC motor? Highlight its significance.

708


In ups static switch if i gives the supply at output end it will open the circuit in stactic switch or not if it will open then how it operates.

1855


What are the function of different components of servo motor?

1557


How Can you do Maintenance of ACB of 2000Amperes

1652


How many types of electrical earthing are there?

657


there is an alternator 480 k.w, 400v,50hz, 4-wire running on load having leakage alternator body earthed current 38 A. is it within acceptable limit? if yes then give reference if no then how to bring within specified limit

1495


What is the formula to calculate a three phase alternator

1790