智能电能表用压敏电阻选型分析研究

Analysis of the components varistor selection of smart meter

压敏电阻是智能电能表电源线路中进行过电压保护的关键元器件,对压敏电阻的正确选型能起到更有效的保护作用、延长其使用寿命。本文对压敏电阻的影响因素进行分析,确定智能电能表用压敏电阻所要分析的参数。依据智能电能表用压敏电阻的统计信息,选取几种典型压敏电阻进行电参数试验,深度分析各参数对不同型号、规格压敏电阻的影响。根据电能表运行工况和参数,确定不同类型电能表对压敏电压的取值范围,提出智能电能表用压敏电阻的选型方法。

The varistor is the key component of smart meter that can protect its power line against from overvoltage harm. Select the suitible model not only protect it better but also prolong its using age. The paper analysis the influence parameters of varistor, sure the key parameters of varistor, that used in smart meter. Based on the statistics information of varistor that smart meter using, select several typical varistors to test that about electric parameters. Research the performance of different models and specifications varistor through analysis the test data of varistor. According to the operating conditions and rated parameters of the smart meter and calculating, determines the range of varistor＇s voltage values, put forward to the selection method of varistor.