This series of fuse consists of fuse link and fuse base.The variable cross-section fuse body made by pure copper piece(or copper wire,silver wire,silver piece) is sealed in the fusion tube which is made by the high porcelain or epoxy glass cloth pipe,there is full of the high-purity quartz sand processed after chemistry to take the extinguishing of arc medium in the tube.The two sides of the fuse use the spot welding to reliably connect with the end palte. The fuse base consists of supported part of fuse link and carrier fuse.After the appropriate fuse link inserted into the carrier fuse,then equipped with the supporting parts to form a complete screw base fuse.There is a transparent glass viewing window on the top of the carrier fuse and from which it is easy to see whether the indicator spring(fusing).This series of fuse has many merits such as convenient in installation and safe in operation and so on.