Energy efficiency limit value and energy efficiency rating of small and medium-sized three-phase asynchronous motor

　　The standard is applicable to voltages of 690V and below, 50Hz three-phase AC power supply, the rated power of energy efficiency class 2 and class 3 is in the range of 0.55kW~315kW, the rated power of energy efficiency class 1 is in the range of 3kW~315kW, and the number of poles is 2 Pole, 4-pole and 6-pole, single-speed enclosed fan-cooled, N-designed general purpose motors or general purpose explosion-proof motors.

　　The minimum allowable values ​​of energy efficiency of motors

　　A guaranteed value that allows for the lowest efficiency of the motor under standard specified test conditions.

　　The target minimum allowable values ​​of energy efficiency of motors

　　After the implementation of this standard for a certain period of time, the minimum efficiency of the motor is allowed, and this value will replace the motor energy efficiency limit value after implementation.

　　Evaluation value of motor energy conservation The evaluation values ​​of energy conservation of motors

　　The minimum guaranteed value of the motor efficiency that meets the energy-saving certification requirements under the standard test conditions

　　basic requirements

　　The general performance, safety performance, explosion-proof performance, and noise and vibration requirements of the motor shall comply with the relevant standards.

　　Motor energy efficiency rating

　　The motor energy efficiency rating is divided into 3 levels, of which 1 has the highest energy efficiency. The efficiency (%) of the rated output power and 75% of the rated output power of each class of motor shall not be lower than the requirements of Table 1.

　　Motor energy efficiency limit

　　The efficiency (%) of the rated output power and 75% of rated output power of the motor shall not be lower than the level 3 in Table 1.

　　Motor target energy efficiency limit

　　The efficiency (%) of the rated output power and 75% of the rated output power of the motor shall not be lower than the level 2 in Table 1. The value shall be implemented four years after the date of implementation of this standard, and replace the energy efficiency limit value of the marine motor. .