Drop-out fuse cutout and load switching fuse cutout are of out door used high voltage protective device. To be connected with incoming feeder of distribution transformer of distribution lines it mainly protects transformer or lines from short circuit and overload, and on/off loading current. Drop-out fuse cutout is composed of insulator support and moving contact is installed on two ends of fuse tube. Fuse tube, static contactor 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 cutout provides enforced elastic auxiliary contacts and arc-extinguishing tube, contact and arc-extinguishing
Enclosure for switching on/off loading current.