The three-phase asynchronous motor can be directly used in the 10KV power grid, with the advantages of simple equipment, saving investment, reducing energy consumption and so on. YR series motor protection level is IP23, cooling method is IC01, YRKS series protection level IP44/IP54, cooling way is IC81W. This series motors have the advantages of high efficiency, energy saving, low noise, low vibration, light weight, reliable performance, easy installation and maintenance. This series of motors can provide large starting torque at low starting current. The feed line capacity is not enough to start the squirrel cage rotor motor starting time is longer and the starting is more frequent. Such as drag hoist, rolling mill, wire drawing machine etc..