AC Electric Motor / AC Motor Series Y, YR, YKS, YRKS medium and large size three-phase asynchronous motor (GB/T13957-92, JB2223-77) Description: The applications for this motor is for general service with air to air/ air to water cooling; cage/ wound type three-phase asyncronous AC motor. Rated Voltage: 6000V, 10000V Power Range: 500-10000kW Protection Class: IP21, IP23, IP44/IP54 Bearing Structure Type: Rolling Bearing or End-shield Type Sliding Bearing Cooling Type: Natural Ventilated, Air to Air Cooling, Air to Water Cooling Frequency: 50HZ, 60HZ