What exactly is Power Factor?
Power Factor (i.e. Cosɸ) of a circuit can be defined as:
Cosɸ = the cosine of an angle between Voltage (V) and Current (I).
R/Z = Resistance/Impedance
VICosɸ/VI = True Power/Apparent Power
The value of power factor can never be greater than 1(Unity)
It is usual practice to attach the word ‘lagging’ or ‘leading’ with the numerical value of power factor to signify whether the current lags or leads the voltage. Thus if a circuit has p.f. of 0.6 and the current lags the voltage, we generally write p.f. as 0.6 lagging.
Power factor can also be expressed as a percentage i.e. 60% lagging.
Coming soon Power Factor #2, I will dive deeply into power factor and its relation to power.