Through theoretical analyses , the zero - phase - sequence current is the reason of the metering error 理論分析這一誤差的產生是由于零序電流的存在。
In the electric power system of neutral point effectively , if parameter is not symmetric , the zero - phase - sequence current will appear 在中性點有效接地系統中,如果參數不對稱就會產生零序電流。