YC series motors are of IP44 totally enclosed fan-cooling type.rated outputs 3HP or below,capacitor starting.Within rated voltage and 50 Hz,the starting torque is three times more than the rated torque and 60 Hz is 2.75 times more.Motors for 4 HP or over are of capacitor start and run type.It has concentrate the agvantages of high starting torque.smooth running,low temperature rising,low noise and greater overload performance.The designation number and nominative valves are all in conformity with IEC.