l额定频率（rated frequency）： 在规定的正常使用和性能条件下能连续运行的电网频率数值。 l额定电流、额定电压、额定频率确定高压开关设备的有关试验条件。
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NOMINAL FREQUENCY(额定频率)(额定频率)(额定频率)(额定频率):输入有名频率是50或60赫兹,239继电器用 这个信息检测相间短路和接地故障跳闸.
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额定频率范围 rated frequency range
低于额定频率 underfrequency
机组额定频率 Rated Frequency
扬声器额定频率范围 rated frequency range of loudspeaker
电机额定频率 MOTOR-RATING PLATE NOMINAL FREQUENCY
低于额定频率百分数卡 underfrequency pc card
额定频率范围输出功率 Reted Output Power
电气设备额定频率 Rated frequency of electrical equipment
所需额定频率 desired rated frequency
即IC611。电动机允许在额定电压和额定频率下直接起动。
The motor is permitted to directly start in conditions of rated voltage and rated frequency.
额定频率为50Hz，JP2D双速磨光电机可带速度转换开关，方便快慢速度的转换。
Rated frequency is 50Hz. The JP2 double-speed finishing motors are with speed-change switch for changing quick or slow speed easily.
并以额定一次电压35KV，额定二次电压100V，额定频率50HZ的电压互感器为例，进行了有限元分析计算和优化设计。
As an example, Finite element analysis and optimization design are made to a voltage transformer of rating primary voltage 35KV, rating secondary voltage 100V, rating frequency 50HZ.
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