PL3223 supplies several indirect parameters, which are used to calculate voltage RMS, current RMS, frequency of the line voltage and so on.
PL 3223提供若干间接参数，依此计算出电压有效值、电流有效值、线电压频率等参量。
The RMS converters of voltage and current have the advantages of high speed and precision, and with the feedback of RMS, the fluctuate of power voltage can be compensated at high precision.
电压、电流真有效值变换精度高、速度快，电压真有效值负反馈闭环控制主回路网压波动补偿精度高；
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