... from 4kw-500kw, 2,4, 6, 8p, IP44,54 class F insulationYR2 series (IP44 IP54) motors are 3-phase asynchronous motors with ... grade IP44 IP54 The rated frequency for the motors is 50Hz; while the rated voltage is 380-440v. The insulation is ... -500KWRated Voltage: 380V-440VSpeed;3000rpm 1500rpm 1000rpm 750rpm 600rpm 500rpmProtection Class: IP44 IP54Ambient Temperature: -15°C~40°CAltitude: not exceed 1000 ...