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RW10-12KV drop-out fuse
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RW10-12KV drop-out fuse

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Dropout fuse overview

Outdoor drop fuse for 35kv and below the voltage frequency 50Hz power system, for transmission lines, power transformer overload and short circuit protection. It has the economy, easy to operate, to adapt to the outdoor environment and other characteristics.

The working principle of the drop fuse

Fuses are connected in series in the power line. In normal operation, the fuse with the button is mounted on the upper contact of the fuse tube, pressed by the pressure relief cap with the tablet, and the fuse tail is pulled out through the fuse , Will pop up the plate twist back pressure near the nozzle, and the lower contact to connect the torque in the pop-up plate under the action of the fuse has been in a tight state, and lock the active joints. When the fuse is in the closing position, the contact of the entire fuse is more reliable due to the downward contact of the upper contact and the outward thrust of the shrapnel.

When the power system fails, the fault current fuses the fuse quickly and generates an arc in the melt pipe. The fuse tube generates a large amount of gas under the action of the arc. When the gas exceeds the given pressure value, Buckle open, reducing the pressure inside the fuse, the current zero produced a strong to the role of free, so that the arc extinguished. And when the gas does not exceed a given pressure value, the release sheet does not move, the current zero produced when the strong free gas from the lower nozzle discharge, the pop-up plate quickly pull out the fuse tail, so that the arc extinguished. Fuse fuse, the activities of the joint release, fuse tube in the static contact under the pressure of the shrapnel, coupled with the rapid decline in the role of their own weight, the circuit cut off to form a clear breakage gap.

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