... , little vibration. Series Three-Phase Asynchronous Motors Y Specifications:1) Frame sizes: 250 2)Rated power:55kw3)Voltage : ... IP446) Insulation class: B 7) Materials: cast iron, aluminum(FRAME 63-160)8) EFF: EFF3, EFF2, EFF19) Poles: 2 ... ,IMB5,IMB35,IMB14,IMB3412) Operating mode: S113) Connection: "Y" type for 3kW and downwards, "D" type for 4kW ... ' requirements Series three-phase asynchronous motor Y