... % Rated Current for 1 secondInputRated Voltage/Frequencythree-phase 380V,50/60HzAC voltage permit fluctuate rangeVoltage:-20% ~ +20%Voltage Unbalance Rate:<3%Frequency fluctuate RangeFrequency:±5 ... .digital output channelProgrammable open-collector output,1 channel; relay output signal ,1 channelDigital panelLED Displayindicate parameters: frequency ,output voltage, output current and so on ...