... proof insulationa) Y3 series motors are totally enclosed and fan cooled (TEFC), three-phase squirrel cage induction motors, ... efficiency, long working life, energy saving, high starting torque, low noise, small vibration, big breakaway torque, reliable operation performance, easy ... , 4, 6, 8 Cooling method: IC411 (total-enclosed fan-cooled type) Mounting types: IMB3 ,IMB5,IMB35,IMB34,IMB14Operating ...