[RW7-12 / 100A] drop-out fuse Profile drop-out fuse 10kV distribution lines installed in the branch line, can reduce the power range, because there is a high drop-out fuse obvious break point, with the isolation switch function, to repair lines and equipment segment to create a safe working environment, increased maintenance personnel security. Mounted on the distribution transformer, distribution transformer can be used as the main protection, so, in the 10kV distribution lines and distribution transformers has been popular. [RW7-12 / 100A] drop-out fuse consist of insulating support, the composition of static and dynamic contact, fuse tube of three parts. Static contact mounted on the insulating support both ends of the fuse tube from the inner tube and the outer arc of phenolic paper tube or epoxy glass fiber cloth tube. Chinese name: high drop-out fuse English name: High pressure cascade fuse material ???? quality: resin, metal working environment: 35KV and below the power system [RW7-12 / 100A] Overview 10kV drop-out fuse Drop-out fuse Suitable for ambient air without conductive dust, corrosive gas and explosive and other dangerous environments, the annual temperature difference becomes less than ± 40 ℃ outdoor venues. Their choice is in accordance with the rated voltage and rated current of the two parameters, that is, the rated voltage of the fuse must match the rated voltage of the protected equipment (line). Fuse current rating should be greater than or equal to the rated current of the melt. The optional melt rated current rated load current 1.5 to 2 times. In addition, the system should be protected three-phase short-circuit capacity of the selected fuses checked. Guaranteed to be a three-phase short circuit protection system capacity is less than the upper limit of the rated fuse disconnect capacity, but must be greater than the lower limit of the rated capacity disconnected. If the fuse rated breaking capacity (generally refers to the upper limit) is too large, it is likely to be the lower limit of the three-phase short circuit protection system capacity is less than the rated breaking capacity fuses, causing the melt blown is difficult to arcing, and ultimately lead melting tube burning, explosions and other accidents. Some power supply units are still in the rural power grids peak, in the selection of such a fuse, it must guarantee the quality of products, the protection of qualified equipment network, at the same time to note that its rated capacity off the upper and lower limits. [RW7-12 / 100A] drop-out fuse works to pull the load drop fuse increases the flexibility of the auxiliary contacts and interrupter cover for division and load current. Drop-out fuse in normal operation, the fuse tube by means of a fuse to form a closed position after tensioning. When the system fails, the fault current to fuse rapidly fuse, parallel to the arc, arc tube by electric arc burning, decomposition of large amounts of gas, so that the formation of high pressure in the pipe, and strong vertical blowing along the pipeline, the arc is elongated quickly extinguished. After the fuse is blown, the lower stationary contact loses tension and the next turn, so tightening mechanism is released fuse tube, fuse tube drop in sharp breaking position. When you need to pull the load, with insulating rod pull the moving contact, when active, static contact is still in contact with the insulating rod pulling continue contacts, auxiliary contacts are separated between the head arc, arc interrupter cover the slit is elongated, while the arc chute produce gas in the current zero, the arc is extinguished.