1,High efficiency, Energy-saving 2,Low noise, Little vibration 3, ... ,660V,50/60Hz 4,Cooling method: IC411 Principle:Y series three-phase induction motors are designed according to national standard with a ... -+40 degreeVolt: 380V/415V/525V/660V 50Hz three phaseConnection way: Y below 3kw Triangle above 4kw Y Series three phase ac motor 30hp