RW7-10 drop-out fuse, RW7 drop-out fuse, RW7-10 / 100A200A

I. Overview RW7-10 high drop-out fuse and pull the load drop fuse is outdoor high-voltage protection appliances. It means the high voltage side of distribution transformer or distribution lines branch trunk road, used as a transformer and line short-circuit, overload and points, co-load current. RW7-10 high drop-out fuse, the insulating holder and fuse tube of two parts, the static contact insulation installed at both ends of the stent, the moving contact is installed at both ends of the fuse tube, fuse tube from the inner arc phenolic paper tube and the outer tube or epoxy glass cloth tube. Pull the load drop fuse enhance the flexibility of the auxiliary contacts and interrupter cover to open, close the load current. RW7-10 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 is quickly blown fuse, and form an arc, arc tube by electric arc burning, decomposition of large amounts of gas, the formation of a high pressure inside the embassy, ??and to form a vertical blowing along the pipeline, the arc is quickly stretched extinguished. After the fuse is blown, the lower part of the moving contacts lose tension at turn two, locking machine, release fuse tube, fuse tube drop, breaking forming a clear position. When you need to pull the load, with insulating rod pull the moving contact, when active, static and dynamic contact is still in contact with the insulating rod pulling continue contacts, auxiliary contacts are separated between auxiliary contacts arc, arc is elongated slit in off the hood, while the hood extinguishing gas is generated in the current zero, the arc is extinguished. Second, use RW7-10 high drop-out fuses for 35kv and below voltage frequency 50Hz power system for transmission lines, power transformer overload and short circuit protection, division and rated load current only with mechanical life ≥2000 times. Third, the conditions 1. The ambient temperature limit applies to 40 ℃, lower limit of -30 ℃. 2. The altitude does not exceed 1000m, wind speed is not greater than 35m / s 3. Fuse 3.1 does not apply to the following places is dangerous fuel or explosive atmosphere. 3.2 There are severe vibration or shock sites. 3.3 There are different electrochemical gas effect and severe air contamination, smog areas. Fourth, the structure Introduction RW7-10 high drop-out fuse, is composed of two parts of the base composition and arc extinguishing device, with the bottom arc tube can turn the spring carrier, always make fuses state of tension, in order to ensure interrupter pipe in the closing position of the lock, line and transformer overload or short circuit, the fuse is blown, the fuse quickly withdrawn from the arc tube, the arc tube is designed to progressively vented resolve on the same fuse breaking size contradictory currents