周碧红,石雷兵,韩志强.电能表射频电磁场辐射抗扰度试验案例分析[J].电测与仪表,2021,58(8):190-193. ZHOU Bi-hong,SHI Lei-bing,HAN Zhi-qiang.Case analysis of immunity to radiated RF electromagnetic fields of energy meter[J].Electrical Measurement & Instrumentation,2021,58(8):190-193.
电能表射频电磁场辐射抗扰度试验案例分析
Case analysis of immunity to radiated RF electromagnetic fields of energy meter
The essence of the immunity test to radiated RF electromagnetic fields for energy meter and two approaches of causing interference in the test was introduced. The interference can be from the voltage induced in meter’s loop circuit or the common mode current induced in connected outside cable. For the case that the interference causes reset and restart meter, the analysis and solution are given. In the case, the induced voltage in the power loop triggered power failure detection event. The interference voltage introduced from RS is filtered out using a by-pass capacitance between the reference pin of the reference voltage chip and the ground, which effectively solves the problem.
