电弧通道对小型熔断器直流分断性能的影响分析

Effect of Arc Channel on DC Interruption Performance of Fuse

随着元器件的小型化应用趋势,小型熔断器的额定电压与分断电流越来越高。借鉴于低压熔断器通过填充灭弧材料限制电弧通道达到提升分断的思路。本文实验通过在小型熔断器的外瓷罐内套小瓷管、外瓷管内壁涂布树脂并填充灭弧材料等方案进行直流分断试验对比,得到了限制电弧通道可以提升电弧电压进而降低电弧能量提升直流分断能力的有益效果。

With the trend of miniaturization for components,the rated voltage and interrupting current of miniature fuses are getting higher and higher.The idea of limiting arc passage by filling arc extinguishing material to achieve lifting and breaking of low-voltage fuse is used for reference.In this paper,the DC interruption experiments are carried out by comparing the schemes of coating resin and filling arc extinguishing materials on the inner wall of small fuses’outer ceramic pots and inner small ceramic tubes.The results show that limiting arc channel can increase arc voltage and then reduce arc energy to enhance DC interruption ability.