The way to make the correct economical choice is to evaluate the life-cycle cost, which includes the purchase price plus an estimate of future operating costs and length of service. The longer high-efficiency motors are run, and the higher their duty cycles, the more energy they will save. The greatest savings are attained where utility rates are highest.

YX3 Series IE2 high efficiency Three phase induction motors
YE3 Series IE3 Super high Efficiency Three phase induction motors
YXL Series IE2 High Efficiency Aluminum Three Phase Induction Motors
YVF2 Series Frequency Variable Speed Regulation Motors