A horn gap fuse is fixed between two rods bent to form the shape of a horn facing upwards.It is also called as HG fuse in short. It is used on 11 KV side of DTC (dist tr center) for protection against overload for each phase. It will be mounted outdoors on suitable structures. The fuse is a protective device which uses to protect the equipment from higher voltage. Horn gap fuse is used in over head power line and used along with electrical Air Break Switches.