How can we calculate the capacity of the capacitor bank attached with the Main

How can we calculate the capacity of the capacitor bank
attached with the Main panel, when we know the capacity of
the panel installed in KVA Rating?

Question Posted / ravis_g239

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How can we calculate the capacity of the capacitor bank attached with the Main panel, when we know ..

Answer / sanjeev nair

The formula for calculating the Capacitive kVAr required to
compensate inductive kVAr is kW*sqrt(tan_angle1-tan_angle2).
In your case, you have to check the present power factor
and then the kW.
Suppose, If you have load of 50kW and the power factor is
0.8 and you have a plan to improve the PF to 0.95 then as
per the above formula the Capactive kVAr required to
compensate the inductive kVAr would be 21.
Besides, one should understand and work on the application.
ie, you can go for a 20 kVAr capacitor bank as per the
above if you have 50kW motor working on a pf of 0.8. If
both load and inductive kVAr is varying, then you have to
go for automatic pf control system with suitable banks to
compensate the inductive kVAr.

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How can we calculate the capacity of the capacitor bank attached with the Main panel, when we know ..

Answer / chiknabacha

http://www.newindiaelectricals.com/newindia/exports/capacitor/calculation.htm

Please find the calculation for KVAR from the required table

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