The cable branch box is only used as a cable branch. The main function of the cable branch box is to branch or transfer cables, mainly for cable branching and cable transfer.
With the development of the distribution network cable process, when the distribution of independent loads with small capacity is concentrated, the cable branch box can be used to connect multiple branches of the cable, because the branch box cannot directly operate each channel.
1) Cable tap function. There are many small-area cables on a long-distance line, which often leads to waste of cable use. Therefore, when the line goes out to the power load, the main large cable is often used to go out, and then when it is close to the load, the cable branch box is used. The cable is divided into several small-area cables, and the small-area cables are connected to the load. This wiring method is widely used in power supply for street lamps in urban power grids, and power supply for small users.
2) Cable transfer function. On a relatively long line, the length of the cable cannot meet the requirements of the line, then a cable joint or a cable transfer box must be used. Usually, the cable intermediate joint is used for a short distance, but when the line is relatively long, according to experience, it is above 1000m On the cable line, if there are multiple intermediate joints in the middle of the cable, in order to ensure safety, the cable branch box will be considered for transfer.
Cable branch boxes are widely used outdoors. With the advancement of technology, the number of cable branch boxes with switches is also increasing, and urban cables often use double-circuit power supply, so some people directly call the branch boxes with switches as outdoor ring network. Cabinets, but at present most of such ring network cabinets cannot realize distribution network automation, but manufacturers have launched outdoor ring network cabinets that can distribute network automation, which also makes the boundaries between cable branch boxes and ring network cabinets begin to blur.
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