低压电涌保护器可靠性改进

Improvement of Reliability for Low-Voltage Surge Protective Device

针对现有电涌保护器(SPD)的结构特点及可靠性问题,对SPD结构进行了改进,并给出了脱离器、低温材料及插拔结构的改进设计方案。试验结果表明,改进的结构从原理上解决了浪涌保护器脱离器动作不平衡问题,提高了SPD产品热稳定性,增强了短路短时耐受能力,减少了故障的发生,且提高了SPD模块更换的便捷性。

Aiming at the existing surge protector device （SPD） structure characteristic and reliability problem, this article proposed a new structure for improvement and presented the improved design scheme for separator, low temperature material and inserting and pulling structure. The test result shows that the improved structure has solved the operating imbalance problem of surge protector device separator in theory, which enhances thermal stability of SPD product, reinforces capability of short-circuit short time endurance, reducing the failure, and improves convenience of changing SPD module.