How to check and repair the dropout fuse?

After the drop-out fuse is installed, personnel will be regularly scheduled for maintenance, so how to overhaul the drop-out fuse, let's talk about it.
1. The porcelain insulation part should be complete and the casting should not be loose
2. The positions of the upper and lower parts of the contacts should be in a straight line, and cannot be twisted up and down.
3. The contact between the fuse tube and the contact should be tight
4. The elasticity of the compression spring should be good
5. The distance between the upper and lower contact positions of the fuse tube should be appropriate for flexible pulling and closing
6. The protective metal cover spring on the static contact should be in good condition, so that the lock can be normal and flexible after closing
7. The contact surface of the contact should be smooth without pitting
8. The fuse tube should be intact, and the surface of the outer insulating layer should not be damaged or deformed
9. All moving parts should be lubricated
10. The melt is intact without damage and matches the load

11. The installation angle and phase distance of the fuse should meet the requirements of the regulations