RW Series Drop Type Fuses and Pull Load Drop Type Fuses are outdoor high voltage protection appliances. It is installed in the distribution
transformer high voltage side or distribution line branch road, used as short transformer and line circuit, overload protection and load current.
The drop type fuse is composed of insulation support and fuse tube. The static contact is installed at both ends of the insulation support and
the moving contact is installed at both ends of the fuse tube.
The filament tube consists of a layer of arc suppression tube and an outer layer of epoxy glass tube. Pull load drop type fuse adds elastic
auxiliary contact and arc extinguishing cover to separate and combine load current.
Drop type fuse in normal operation, the fuse tube with the help of the fuse tensioning to form a closed position. When the system fails,
the fault current makes the fuse fuse quickly, and forms an arc, elimination arc tube by arc hot, decomposition of a large number of gas,
so that the tube formed a high pressure, and formed along the pipe longitudinal blowing, arc is rapidly elongated and extinguished.
After the fuse is blown, the lower moving contact is lost pull down, locking mechanism release fuse tube, fuse tube fall, forming an
obvious break position. When you need to pull the load,pull the moving contact with an insulating rod, at this time the active and
static contact is still however contact, continue to pull the contact with the insulating rod, the auxiliary contact is also separated,
the arc is generated between the auxiliary contact, the arc is elongated in the arc extinguishing cover slit, and the arc extinguishing
cover produces gas in the electricity When it passes through zero, the arc is extinguished.
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