how to calculate the capacitor rating for improving power
factor
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Answer Posted / engr. tariq
Formula :
C = P (tan|old - tan| new) divided by Omega (w) and then
divided by Voltage (RMS) or Vrms.
theta (|) can be calculated by knowing cos theta OR power
factor. Example PF is 0.77 then Cos theta = 0.77 and Cos
inverse (0.77) = 39.646 = Theta OLD. Now
Now if i want to improve PF to 0.9 then theta = Cos inverse
0.99 = 25.841 = theta New.
After calculating theta put it in the Given formula to
calculate Capacitance required.
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