Drop-out Fuse Cut-Out and load switching Fuse Cut-Out are of outdoor used high voltage protective device, tube connected with incoming feeder of distribution transformer or distribution lines, it mainly protect transformer or lines from short circuit and overload, and on/off loading current. Drop-out Fuse Cut-Out is composed of insulate insulator supports and fuse tube, static contacts is fixed on two sides of insulator support and moving contact is installed on two ends of fuse tube, fuse tube is composed of inside arc-extinguishing tube. Outer phenolic compound paper tube or epoxy glass tube, load switching Fuse Cut-Out provides enfored elastic auxiliary contacts and arc-extinguishing exclosure switching on-off loading current.