What is the power factor and how to calculate it?

[ibrar]

Hi all

i have some questions about power factor

1) what is power factor
2) how to calculate it in single phase and in three phase
3) how a capacitor improve power factor


Thanks

 

[MSRA]

Re: Power Factor

check these.

https://en.wikipedia.org/wiki/Power_factor

Added after 38 seconds:

Also i found these while searching on google

 

[hdrzaman]

Power Factor

POWER factor is the cosine of phase angle.