In the power support system of railway transportation, the Low Voltage Aerial Bundled Cable (ABC) serves as a key power distribution device, undertaking the crucial responsibility of delivering stable electrical energy to railway-side signal systems, communication equipment, lighting facilities, and auxiliary power units. Among them, the railway-specific low-voltage aerial bundled cable with aluminum alloy conductor and cross-linked polyethylene (XLPE) insulation has become a preferred solution in the upgrading and new construction projects of modern railway power distribution networks, thanks to its performance advantages adapted to railway scenarios and reliable operation performance. In terms of conductor material, compared with traditional pure aluminum conductors or copper conductors, aluminum alloy conductors exhibit significant adaptability in railway scenarios. On one hand, through a reasonable proportion of components (such as adding magnesium, silicon, etc.), aluminum alloy not only retains the characteristics of light weight and low cost of aluminum, but also greatly improves mechanical strength and fatigue resistance. Its tensile strength can reach more than 1.5 times that of pure aluminum conductors, which can effectively resist external mechanical influences such as vibration and strong wind caused by train operation along the railway, reducing the risk of conductor breakage, deformation and other faults. On the other hand, aluminum alloy conductors have better corrosion resistance. By forming a dense oxide film, they can withstand the erosion of complex environments such as humidity, dust, acid-base fog that may exist along the railway, prolonging the service life of the cable and reducing later maintenance costs. At the same time, the aluminum alloy conductor has good flexibility, which is convenient for construction and installation in the complex erection environment along the railway (such as crossing the track, bypassing the bridge pier, etc.), improving project efficiency. In terms of the insulation layer, the application of cross-linked polyethylene (XLPE) material provides core protection for the safe operation of the cable. Through the cross-linking process, the XLPE insulation layer forms a three-dimensional network structure of polyethylene molecules. Compared with the traditional polyvinyl chloride (PVC) insulation, it has better high-temperature resistance. The long-term allowable operating temperature can reach 90℃, and the short-term overload temperature can rise to 130℃, which can adapt to the extreme climates of high-temperature exposure in summer and severe cold in winter along the railway, avoiding aging and cracking of the insulation layer due to temperature changes. In addition, the XLPE insulation layer has outstanding electrical insulation performance, with high insulation resistance and low dielectric loss, which can effectively reduce the risk of leakage during cable operation and ensure the power supply stability of the railway power distribution system. Its wear resistance and tear resistance can also cope with unexpected situations such as foreign object collision and animal biting that may occur along the railway, further improving the operation safety of the cable. From the perspective of product structure and functional adaptability, the low-voltage aerial bundled cable (ABC) for railway adopts a bundled design, which binds multiple insulated cores (usually including phase wires and neutral wires) into a bundle through a specific process. Compared with the traditional single overhead wire, it not only reduces the number of wires erected, reduces the space occupation along the railway, but also avoids mutual friction and interference between the cores, reducing fault points. At the same time, this type of cable is usually equipped with a dedicated overhead support structure, which can be installed in coordination with facilities such as catenary brackets and signal poles along the railway, without the need to build a large number of additional supports, reducing the engineering construction cost and construction difficulty. In terms of performance parameters, the rated voltage of the cable is usually adapted to the railway low-voltage power distribution system (such as 0.6/1kV), and the current-carrying capacity can be flexibly designed according to the power load demand along the railway, which can meet the power demand of different sections (such as station hubs, section lines, tunnel interiors), ensure the continuous power supply of key facilities such as signal systems and communication equipment, and provide power support for the safe and efficient operation of railway transportation. In practical application scenarios, this cable has been widely used in the power distribution networks along conventional railways, high-speed railways and urban rail transit. For example, in the section lines of high-speed railways, it can provide power for the signal relay stations and catenary inspection equipment along the line through overhead installation; in the ground section of urban rail transit, this cable can adapt to the complex municipal environment and deliver electrical energy for the station auxiliary facilities and the lighting system along the line. In addition, the maintenance convenience of this cable also meets the operation needs of the railway system. The aging speed of the XLPE insulation layer is slow, and the aluminum alloy conductor has strong corrosion resistance, which greatly extends the average fault-free working time of the cable, reduces the frequency of manual inspection and maintenance, and lowers the labor cost and time cost of railway operation. To sum up, the low-voltage aerial bundled cable (ABC) for railway with aluminum alloy conductor and XLPE insulation, through material optimization, structural innovation and performance upgrading, perfectly adapts to the complex environment and strict requirements of railway scenarios. It plays an irreplaceable role in ensuring the stability of the railway power distribution system, improving engineering economy, and reducing operation and maintenance costs, and is one of the important equipments to promote the high-quality development of the modern railway power system.