Learn the basics of Electrical Engineering.

The easiest method to calculate Capacitor rating for Power Factor correction

While many capacitor charts are available for power factor calculation. We can achieve the same by a simple formula, which is useful in case you can't access table.

Let's consider your system draws Power 'P' at a power factor of θ1. Suppose you want to improve the power factor to θ2. Now use this formula to find the required capacitor rating:
Q = P (tan 𝜃1 - tan 𝜃2)
Let's do an example to learn this:

Statement: An electrical load draws 100 kW power at a power factor of 0.8. Determine the reactive power which should be supplied to the system for improving the power factor to 0.9.

Solution: Q = P (tan 𝜃1 - tan 𝜃2)

Q = 100 (tan (36.86) - tan(25.84)
   = 26.5 kvar

I hoped you'd loved this easiest and simple way to obtain the answer.

Also learn: AC or DC Which is more dangerous

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