ELECTRICAL THUMB RULES

Current Rating of Capacitor
KVAr   X   1.35


Capacitor recommended for 3 Phase Motor
HP  X    0.4 KVAr

Motor Power Factor
No-Load P.F = 0.6
Load  P.F  =  0.8

Transformer Power Factor
No-Load P.F = 0.2
Load  P.F  =  0.8

Capacitor required for  No - Load Transformer  P.F compensation
% Impedence   X    10 


Note :   These Rules can only used for getting approximate values.  For  actual  value use appropriate formulas.


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