This standard specifies the energy efficiency grade, minimum allowable values of energy efficiency, target minimum allowable values of energy efficiency, evaluating values of energy conservation and test methods for small and medium three-phase asynchronous motors (hereinafter referred to as: motors).
This standard is applicable to general-purpose motors or general-purpose permissible motors with single-speed close fan cooled and N design that the voltage is 690V and below, the power supply is 50 Hz three-phase alternating current supply, the rated power with Grade 2 and Grade 3 energy efficiency is in 0.55kW~315kW, the rated power with Grade 1 energy efficiency is in 3kW~315kW, the number of poles is 2 poles, 4 poles and 6 poles.
