... The series has high locked-rotor torque, Dependable circulation, Beautiful shape, Low lad noise, Long life Features: High efficiency and energy saving. ... Low noise and little vibration. . The ambient temperature subject to ... 230/400V 400/690V Frequency(HZ): 50HZ or 60HZ Raged Speed(rpm): 600r/min 10-pole,750r/min 8-pole,1500r ...