... , less comsuption, high starting torque,low noise, little vibration. Series Three-Phase Asynchronous Motors Y Specifications:1) Frame sizes: 250 2)Rated power ... ) Protection class: IP446) Insulation class: B 7) Materials: cast iron, aluminum(FRAME 63-160)8) EFF: EFF3, EFF2, EFF19) Poles: 2 ... %17) Special motors can be designed according to customers' requirements Series three-phase asynchronous motor Y