Y2 series motors are totally enclosed fan cooled three-phase cage induction motors, and are renewal and upgrading products of Y series motors(IP44). They have reached an international advanced level of the same kinds of products of 90's. Compared with Y series, Y2 series motors have higher efficiency, larger start torque, higher protection degree (IP54), higher insulation class (class F, treated as class B), lower noise (appraised with load-noise), beautiful model and reasonable structure. Y2 series motors have the same power grade and mounting dimensions with Y series motors which comply with IEC standards.