الجواب :
Ptower = 1000x12= 12000w= 12 kw.
Stower = Ptower /pf= 12/0.85= 14.12 kva .
S = Quant x Stower = 4x14.12 = 56.47 kva .
Itower = Stower /(1.73x VLL ) = 14.12/(1.72x0.38) = 21.48 A .
I = Quant x Itower = 4x21.48= 85.91 A .



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