Gneral:
Drop-out Fuse With Load (here in after abbreviated as "Fuse") is used in power distribution and distribution
transformer with alternative current 50Hz, rated voltage 10kV for overload and short circuit protection and for
opening and closing rated load current.
Structure:
This kind of fuse consists of three parts: Fuse base, load arc-extinguishing device and an arc-extinguishing
device. Active and static contactor is of bridge structure. While fuse is in closing position, active and static
contactor will be tightly pressed by compressed spring to guarantee a suitable pressure between contactors. A
rotary torsion spring is equipped in the lower end of arc-extinguishing tube. When a fuse-element is put in the
tube, the torsion spring will be screwed tightly, the fuse will be in drawing tightly condition to ensure the arc-
extinguishing tube self-locked in closing position. When overload or short-circuit occurs, fuse-element will be
melted and the fuse will be quickly drawn out from the fuse tube by the torsion spring. Meanwhile, a great deal
of arc-extinguishing gas is produced in the fuse tube by electric arc heat energy to extinguish electric arc
quickly. After electric arc-extinguishing, the voltage between the both ends of the fuse is regained. The fuse
tube will be dropped out by its weight and a function of compressed spring with bridge contactors. So an
obvious disconnected section will be produced. Arc-extinguishing tube is designed at a step by step gas-
discharging type. While breaking a low current, gas produced will be released from the lower vent. While
breaking a high current, the gas produced will be released from the upper cap to realize a gas release from
both the top and the bottom, which meets the requirements of breaking different current in the same fuse...
Main Technical Data:
| Rated Voltage |
12 kV |
| Rated Current |
100 A |
| Rated Breaking Capacity |
Upper Limit |
40 MVA |
| Lower Limit |
100 MVA |
| Off/on Loading Current Times |
≥10 |
| Weight (If silicon rubber equipped, the 2kg could be reduced.) |
7.6 KG |
Notes for ordering:
Please offer the followings while ordering:
Product name and type, specifications, rated current of fuse tube, quantity, if spare parts or other accessories are
necessary.
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