... Introduction BPJ1 series of mining flameproof and intrinsically safe AC inverter is a type of high-tech products ... oil pumps. 4.Technical Parameters Rated input featureAC 380V, AC 660V, AC 1140V;50Hz~60HzVoltage fluctuation: ±15%, frequency fluctuation: ± ... relay outputDisplayDisplay screenSetting frequency, output frequency, current, power, motor speed, load rate, input and output torque, etc.Fault ...