Hello:
——★1.Single phase generator: The output power of the generator is the apparent power, so it should be 4000VA. Its nominal current is: I = P ÷ U, i.e.: 4000 VA ÷ 220 V = 18.2 A;
——★2.Three-phase generator: three-phase TV The current nominal value of the machine is: I=P?÷(1.732×U), i.e.: 4000 VA÷(1.732×380)=6.08 A.