Answer Posted / rajkumar

we should convert that kva to kw,

Power (KW) =KVA*pf
           =15*0.8
     P  KW =12.
 then,
      P=1.732*V*I*COS*EFF
       
we need current,

      I=  P/1.732*V*COS*EFF
       =  12/1.732*415*0.8*80%
       =  17.7 A

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