RN1 RN3 Indoor H. V Current - Limiting Fuse

---  FUSING CHARACTERISTICS

1. When the passing current for fuse is 1.3 times of its rated current, it does not melt in 1hour.

2. When the passing current for fuse is 2 times of its rated current, it melts in 1hour.

3. Fusing characteristic curve of fuse see the following fig, for refernce of selecting fuse.

--- STRUCTURE OF MELT TUBE

   Melt tube is the main component of fuse made of fus ewire installated in porcelain tube, which is filled with quartz sand, and completed by sealing the two ends. The melt tube with rated current 7.5A and below and rated voltage of 35kV,its fuse wire is wined around purpose made porcelain core, for rated current above 7.5A,its fuse wire hanging in the porcelian tube.