... Tropic proof insulationa) Y3 series motors are totally enclosed and fan cooled (TEFC), three-phase squirrel cage induction motors, developed ... top of motor.e) Y3 motor are totally enclosed and fan-cooling designed. They are newly designed in conformity with the ... EFF: EFF3, EFF2, EFF1 Poles: 2, 4, 6, 8 Cooling method: IC411 (total-enclosed fan-cooled type) Mounting types: IMB3 ,IMB5,IMB35,IMB34 ...