Industrial fuse links are designed to protect electrical installations against the effects of short circuits and overloads. The operation of the gG slow-blow fuse-link at small overloads is slower than that of fast-acting fuse-links, and very fast in the event of a short-circuit. They have a double activation indicator and are mounted in the fuse bases with the use of an insulating holder. Insulation class C-VDE 0110.