对电压电流采样，计算相位差后通过投切电容器进行电路补偿，提高电路传输效率.-Of voltage and current sampling, the calculation after phase switching capacitor circuit through the compensation circuit to improve transmission efficiency.

在IEC61850-9-2中，smv报文的发送用来实时地传输电网上的电流电压采样值-smv send

对电压电流温度等进行采样，并在1602显示屏上进行循环显示；发生故障时，也在屏幕上显示；同时具有万年历功能，断电后保存故障具体信息，如故障信息和故障发生时间，通电后再屏幕上显示出来。-The voltage and current, temperature sampling, and in 1602 display loops show failure, but also the screen display also has a calendar function, after the p

西门子双极性换算关系 4-12-20mA，假设电流电压比800/5,6300/100， 采样原值X,实际工程值Y，注意：12MA工程值理论是为0，可适当减零漂(SIEMENS bipolar conversion between 4-12-20mA, assuming the current voltage ratio 800/56300/100, sampling value X, value engineering Y, attention: 12MA value engineering t