Calculate KVAR Rating in Electrical Panel || Capacitor rating calculation

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How to Calculate KVAR Rating in Electrical Panel :

First we must know these three values:
Load = ?
Power Factor = ?
Achive = ?

Example-

Load = 150 kW
PF = 0.70
Achive = 0.99

Answer:

Formula- KVAR = P (tanØ1 - tanØ2)

Here,
1. CosØ1=0.7
Ø1=Cos-1(0.7)
Ø1=45.57
2. CosØ2=0.99
Ø2=Cos-1(0.99)
Ø2=0.10

put the value in formula-

KVAR = 150{tan(45.57)-tan(0.10)}
KVAR = 150(1.02-.14)
KVAR = 150(.88)
KVAR = 132
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Some motor have 0.7 some have 0.8 PF, which one to consider?

abhigangarde
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How PI2 = Cos(invers) (0.99) comes 0.10, it should be 8.10 only
Need Clarification on that????

NagendraKumar-pchp
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that is for improvement of power factor only .. it if we dont need achieve and simply to find c.b for kw then?

engjamalhussain
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How to decided number of stages of APFC Panel?

sidharthamane