High drop-out fuse is an overload protection device, which mounted on the high voltage side of distribution transformer or power line pole, used for short-circuit transformers and circuit, overload and points, co-load current. Drop-out fuse the two portions of the insulating porcelain (or composite silicone rubber) and conductive structural body and the interrupter tubes, static contact at both ends of the bracket mounted on bronze, the moving contact is installed at both ends of the fuse tube, fuse tube the inner arc tube and epoxy glass cloth tube. Products with application flexibility, excellent features, easy installation, long maintenance-free operation and long life.