Introduction to the use of 10kv cable branch box

Common 10kV cable branch boxes include modern American cable branch boxes, European classical cable branch boxes, double-loop cable branch boxes, cable branch boxes with a power switch, etc., generally without protection equipment. With the development trend of the cabling process of distribution network, when the individual load with small volume is more centralized, the cable branch box can be applied to carry out the connection of multiple branches of cables. Since the branch box cannot immediately carry out actual operation on each road, it is only used as a cable branch application, and the primary function of the cable branch box is to tap or connect the cables. The cable connector of the cable branch box is of special plug type, which has high stability, saves indoor space and is convenient to install and use, thus basically removing the common fault point of the cable-the common fault of the cable head, thus enhancing the stability of the power supply system. In addition, the transformer connected to the tail end of each main line is also maintained, so there will be no load problem of branch cables. The cable branch box can be equipped with a general brake according to customer regulations, which is convenient for the maintenance of the branch box and the general maintenance of branch lines. The primary function of the cable branch box is shown in the following: when the distance between a line is long, if many cables with lower load are selected to close, a lot of excess consumption will be generated. Therefore, the main cable with relatively large load is generally selected for the main task and then close to the load, in the application of cable branch box to branch the main cable, according to the specific load of terminal equipment three-phase five-line distribution, select the appropriate cable connection; 10kV cable branch box is used for branch lines other than the main pole circuit, as the tail load connection power consumption application, suitable for small and medium-sized customer centralized areas to carry out load tap connection power consumption, can not connect the main pole double circuit and contact. The 10kV cable branch box adopts cable three-phase five-wire 1 circuit, group outgoing line 2 or 4 circuits, the number of group outgoing lines can be adopted according to the application, and the rated voltage is 630A. Select the full insulation layer, fully enclosed, fully shielded off the touchable structure, and its use of anti-essence dew, anti-internal common fault arc leakage and other countermeasures. Before the operation of the cable branch box, be sure to check whether the wire connector of each branch cable is connected with the terminal block of the shell and tightened. At the same time, the metal shell of the shell must be immediately connected to the lightning protection belt or have a significant connection address. After the cable branch box is installed, the cable and components must be tested together in accordance with the relevant requirements of the inspection specifications and standards. If the application is used in a multi-loop side-by-side operation inside a substation, it must be verified that the application of a touchable cable connector is beneficial to safety when one of the loops and the adjacent loop are energized. However, when applied to the cable branch box, there will be no such problem at all. As the design scheme is maintenance-free goods, there is no secondary line in the branch box that must be protected and repaired. Moreover, the shell of the branch box is IP43 waterproof grade, and the shell has a reliable grounding device. The shell of the branch box is not allowed to be opened during the power-on operation. It is very possible that the power-on will not touch the cable connector inside the branch box.

enclosed busbar can be embedded in a variety of power sockets, can be adjusted or moved. Because the enclosed bus is plug-in type, it is convenient to lead out the loop. Prefabricated component cable branch power supply circuit, because it is the overall prefabricated component cable, it is not easy to lead out the branch power supply circuit, and it is also difficult to upgrade the branch power supply circuit by cable. On a relatively long line, the length of the cable manufactured by the manufacturer cannot meet the requirements of the line, so it is necessary to apply the cable middle connector or the cable transfer box. In general, the cable middle connector is selected for short-term routes, but in the case of relatively long lines, if the cable has several middle connectors on the cable line above 1000M according to working experience, it will endanger the reliable operation of the cable. Therefore, it is considered that the cable branch box is connected and widened.