自能灭弧室用喷口性能的改进方法

Performance improvement method of nozzle for self-energy arc extinguishing chamber

某SF6断路器的开断过程中产生大量电弧,在电弧的热及大量紫外线辐射的作用下,聚四氟乙烯树脂的外部及内部极易生成具有导电性的碳化物,降低了灭弧喷口的绝缘性能,且大幅降低了灭弧喷口的力学性能。为了提高喷口的耐烧蚀性能,提出了一种在自能灭弧室用喷口中填充蓝色系铝酸钴CoO-Al_(2)O_(3)的方法,分析了混料方式和成型工艺,结果表明:该方法可提升喷口的力学性能,同时降低电弧烧蚀的损耗量。

A large amount of arc was generated during the breaking process of a SF6 circuit breaker.Under the action of arc heat and a large amount of ultraviolet radiation,the external and internal of polytetrafluoroethylene were very easy to generate conductive carbides,which reduced the insulation performance of the arc extinguishing nozzle and greatly reduced the mechanical properties of the arc extinguishing nozzle.In order to improve the ablation resistance of the nozzle,a method of filling blue cobalt aluminate CoO-Al_(2)O_(3) in the nozzle of self-energy arc extinguishing chamber was proposed.The mixing method and molding process were analyzed.The results show that this method could improve the mechanical properties of the nozzle and reduce the loss of arc ablation.