... pumps and oil pumps. 4.Technical Parameters Rated input featureAC 380V, AC 660V, AC 1140V;50Hz~60HzVoltage fluctuation: ±15 ... relay outputDisplayDisplay screenSetting frequency, output frequency, current, power, motor speed, load rate, input and output torque, etc.Fault ... under voltage, short circuit, over-current, leakage etc.Explosion-proof marksExd[ib]IAir-cooled methodHeat pipe wind-cooling or heat ...