额定效率 meaning in English

rated efficiency

The large quantity statistics data express , the efficiency of motor is not accordant with the data that are marked in the data plate
大量统计数据表明，电机即使在额定状态下运行，效率也与铭牌标出的额定效率不一致。
Output characteristic include the relation of efficiency and discharge under 50hz situation , and the relation of rated efficiency and discharge under the frequency conversion situation
输出特性包括变频时效率与流量的关系和工频时额定效率与流量的关系。