Development of a low cost and long lifetime fuse without pollution

为了研制一种在污秽环境中性能良好的新型熔断器，采用不锈钢丝作为22 kV高压配电断路器的熔断器元件。最近，由于刷的污染/污染而发生了一些预燃弧事故，因此需要一种与Ag元件相比更耐电晕放电且成本更低的熔丝元件材料。(1)研制了一种新型的不锈钢丝限流熔断器，该熔断器成本低、结构简单。不锈钢丝的熔化特性几乎与Ag元素相同。(2)采用不锈钢丝和灭弧砂制成的新型螺旋形大电流熔断器，与采用Ag元件的原型熔断器相比，具有良好的性能。(3)硅胶管具有与聚四氟乙烯（PTFE）相同的优良灭弧性能，可以用作灭弧管，但受实验设备的限制，无法研究在交变大电流中叠加冲击电流时，动态电流的开断可能性。然后这个保险丝的效用还没有被判断。

In order to develop a new type fuse with a good property in contaminated envrionment, stainless wire was applied to the fuse element for 22kV high distribution voltage cutout. Recently some pre-arcing accidents occurred because of pollusion/contamination of brushing, so a kind of fuse element material which is more resistant to corona discharge and lower cost compared to the Ag element is desired.(1) A new type of current-limiting fuse made of stainless steel wire with low cost and simple design had been developed. The fusion characteristics of stainless wire are almost the same as the Ag element.(2) A new spiral shape fuse with large current fusion property made of stainless wire with arc extinguishing sand has a good characteristic as compared to prototype fuse with the Ag element.(3) Silicone tube has excellent arc extinguishing performance as the same as polytettra-fluoloethylene (PTFE) and then silicone can be used as an arc extinguishing tube.But interrupting possibility of dynamic current could not be investigated for the restriction of experimental equipment when impulse current is superimposed in the alternative large current. And then utility of this fuse has not been judged.