结合国标 GB/T17626． 11—2008 和国内外相关研究成果，设计了低压脱扣器电压暂降脱扣特性的实验方案，搭建了相应的实验平台，对当前市场上主流的 10 种型号低压脱扣器进行大规模实验，测试了低压脱扣器在不同电压暂降幅值、持续时间、相位等特征量组合作用下的脱扣特性，发现电压暂降幅值、持续时间及相位共同决定低压脱扣器的电压暂降脱扣特性． 通过对实验结果进行极值化处理，采用曲线拟合方法，分别从相位、幅值维度上形成幅值与持续时间、相位与持续时间之间的函数关系，建立了低压脱扣器的电压暂降脱扣特性模型．

According to the GB/T17626． 11—2008 and the correlated research results at home and abroad，an ex-perimental scheme was proposed to explore the tripping characteristics of low-voltage release under voltage sag，and the corresponding experimental platform was constructed． With this platform，large-scale experiments of 10 com-monly-used low-voltage releases were carried out at different voltage sag amplitudes，durations and phases，finding that the amplitude，the duration and the phase collectively determine the tripping characteristicsof low-voltage re-lease under voltage sag． Moreover，the experimental results were extremely treated and a curve fitting was per-formed to explore the function relationship between the amplitude and the duration at different phases，as well as the function relationship between the phase and the duration at different amplitudes． Thus，a tripping model of low-voltage release under voltage sag is successfully established．