... to lower cost and higher value of output.Technical parameter 1,Input voltage:AC380V±10%(below 4KW,input voltage is 220V ... ly)4,Output current:0 to specified value5,Output stability:≤±1%6,Operating frequency:17±3KHz7,Operating method:PWM( controll remotely ... );8,Duty cycle:1-80%(it depend on voltage and current);9,Overall efficiency ...