Analysis of the causes of power anomalies caused by faults in the secondary circuit of primary metering

For users of 10 kV high-voltage dedicated transformers with high-supply and high-metering measurement methods, during the installation process of the electric energy metering device, due to the construction personnel's failure to strictly implement the regulations of DL/T448-2016 "Technical Management Regulations for Electric Energy Metering Device", DL/T825-2021 "Installation and Wiring Rules for Electric Energy Metering Device", etc., the current transformer adopts simplified wiring, and the secondary circuit neutral line is disconnected during operation, resulting in abnormal power. This article analyzes the causes of abnormal metering data and power under the condition of simplified wiring of current transformer and secondary circuit neutral line disconnection, and proposes detailed and reliable technical measures to effectively avoid power errors and comprehensively improve the operation quality of electric energy metering device.