Guangdong sales of remote control drop-out fuses

The moving contacts at both ends of the fuse tube are tied by the fuse (melt), and the upper moving contacts are pushed into the duckbill protruding part
Drop-out fuse
Two reasons reduce the drop-out fuse function. In reality, there are often situations where there is a lack of fused pipe or melt, or copper wire, aluminum wire or even iron wire is used to replace the melt. The tripping rate of lines and the failure rate of distribution transformers remain high.
Drop-out fuses are suitable for outdoor places where the ambient air is free of conductive dust, corrosive gases and flammable, explosive and other dangerous environments, and the annual temperature difference ratio is within ℃. The selection is based on two parameters: rated voltage and rated current, that is, the rated voltage of the fuse must match the rated voltage of the protected equipment (line). The rated current of the fuse appliance should be greater than or equal to the rated current of the melt. The rated current of the melt can be selected as .~ times of the rated load current. In addition, the selected fuse should be checked according to the three-phase short-circuit capacity of the protected system. Ensure that the three-phase short-circuit capacity of the protected system is less than the upper limit of the rated breaking capacity of the fuse, but must be greater than the lower limit of the rated breaking capacity. If the rated breaking capacity of the fuse (generally refers to its upper limit) is too large, it is likely that the three-phase short-circuit capacity of the protected system will be less than the lower limit of the rated breaking capacity of the fuse, making it difficult to extinguish the arc when the melt melts, eventually causing Accidents such as melted pipe burnout and explosion. Some power supply units are still at the peak of rural power network transformation. When selecting this type of fuse, they must strictly control product quality and protect qualified equipment from entering the network. At the same time, attention should be paid to the upper and lower limits of its rated breaking capacity.
During installation, the melt should be tightened (so that the melt is subject to about a tensile force of about .), otherwise it will easily cause the contact to heat up.
The fuse should be installed firmly and reliably on the cross arm (frame) without any shaking or shaking.
The fused pipe should have a downward inclination, so that when the melt melts, the fused pipe can fall quickly by its own weight.
The fuse should be installed on a cross arm (frame) with a vertical distance of no less than 100 meters from the ground. If it is installed above the distribution transformer, it should maintain a horizontal distance of more than . A molten pipe fell causing other accidents.
The length of the fused pipe should be adjusted appropriately. It is required that the duckbill tongue can hold more than two-thirds of the length of the contact after closing to avoid malfunction of falling on its own during operation. The fused pipe must not push the duck to death. mouth to prevent the fused pipe from falling in time after the melt melts.
The melt used must be a standard product from a regular manufacturer and have a certain mechanical strength. Generally, the melt is required to be able to withstand at least the above tensile force.
Drop-out fuses are installed outdoors and require a minimum phase distance.
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