三相四线表单相失压时更正系数为2的原因分析

Analysis of Correction Coefficient Being 2 with Respect to a Three-phase Four-wire Meter Encountering Single-phase Voltage Loss

针对三相四线表出现单相失压而更正系数为2的情况进行了现场检查与分析,发现A相、零相电压线熔断导致计量二元件和计量三元件计量电压为线电压分压电压是造成表计失压且更正系数为2的原因。

This essay focuses on a situation of correction coefficient being 2 with respect to a three-phase four-wire meter encountering single-phase voltage loss.It reports the on-site inspection and analysis carried out,which found that the fusion of A-phase and zero-phase voltage lines made the measured voltages from the second and the third measuring elements actually partial voltage of the line,and consequently resulted in the aforementioned situation.