The formula to calculate Reactive Power is:
\[ RP = \sqrt{AP^2 - TP^2} \]
Where:
Reactive power is the amount or proportion of power that is out-of-phase with the other transmitting powers, known as the true power and apparent power.
Is reactive power good or bad? In general, reactive power is good for an electric system. The reactive power provided to or by the system is used to regulate the voltage of a system. For example, if the voltage is not high enough in a system, then the active power may not be supplied. Reactive power is then introduced to increase the voltage and allow the active power to transfer and do work.
Let's assume the following values:
Using the formula:
\[ RP = \sqrt{50^2 - 30^2} = \sqrt{2500 - 900} = \sqrt{1600} = 40 \]
The Reactive Power is 40.