Power factor

Improvement of the power factor will not affect your consumption.

However, it will affect the price you pay for that consumption.

Let's say your consumption is 5 kW.

As Q=V.I.cos φ and your cos φ is 0.569, you only have an available power of 2.845 kW (active power) while paying for 5 kW.

Now, with your capacitor bank that raises the cos φ to 0.999, you have 4.995 Kw available and you pay the same as before.

Thanks,
This is very clear that by maintain the cos φ we can save the energy cost. But in this case the apparent power is already maintained a cos φ 0.999 with the APFC installed at the source of power (Distribution system). The cos φ is down at the load end. My question is if we improve the cos φ = 0.999 at the load end (Active power) can we save energy cost ??..

No, you cannot save more once you reached that level of cos φ.

But you greatly improve the efficiency of your electrical system.