说明：  三相计量芯片、提供全波、基波有功电能，5000:1动态范围内，非线性误差<0.1%，满足0.5S和0.2S级有功电能表精度要求
(The three-phase metering chip provides full wave and fundamental active energy. In the dynamic range of 5000:1, the nonlinear error is less than 0.1%, meeting the accuracy requirements of 0.5s and 0.2S active energy meters)