The 11kV Triplex-style ABC (Aerial Bundled Cable) overhead cable is a high-efficiency power transmission product specifically designed for medium-voltage three-phase power distribution systems. Adopting a Triplex (three-core) integrated structure, paired with high-purity aluminum conductors and XLPE (Cross-Linked Polyethylene) insulation layers, it has a rated voltage of 11kV, accurately adapting to the three-phase power transmission needs of medium-voltage distribution networks below 35kV. It is widely used in urban medium-voltage distribution backbone lines, high-voltage power supply lines in industrial parks, power grid connection projects in urban-rural fringe areas, and medium-voltage power coverage projects in remote areas. Its integrated three-core design simplifies line layout, and the combination of the high-voltage resistance of XLPE insulation and the lightweight advantage of aluminum conductors not only ensures transmission safety and stability in medium-voltage scenarios but also reduces pole load and construction costs. It has become a core component in the medium-voltage three-phase power distribution field, especially suitable for scenarios with high requirements for transmission efficiency, space occupation, and operation and maintenance convenience.​ In terms of core specifications and structural design, the cable’s rated voltage of 11kV complies with medium-voltage distribution system standards, enabling it to stably carry high-voltage transmission tasks of three-phase alternating current and cope with power grid load fluctuations (such as the start-stop of industrial park production equipment and urban electricity consumption peaks), avoiding insulation failure or line faults caused by voltage breakdown. The Triplex three-core structure is its key design: three insulated conductors are integrated into the same cable bundle, serving as phases A, B, and C of the three-phase circuit respectively. There is no need to erect three independent cables separately, which greatly reduces the number of overhead lines and occupied space, decreases the usage of supporting facilities such as poles and fittings (reducing the number of poles by more than 50% compared to traditional single-core cables), and shortens the construction period. The conductors are made of high-purity electrolytic aluminum (purity ≥99.5%), and some models undergo alloying treatment (adding magnesium and silicon elements) to improve mechanical strength and corrosion resistance. The conductivity can reach more than 61% IACS (International Annealed Copper Standard), ensuring current transmission efficiency in medium-voltage scenarios. At the same time, its density is only 1/3 that of copper, significantly reducing the cable’s self-weight (the weight per unit length is more than 60% lighter than copper conductor cables), reducing the load pressure on poles, and being suitable for overhead lines with larger spans (maximum span up to 120 meters or more).​ The XLPE insulation layer is the core guarantee for the cable to adapt to medium-voltage scenarios. Compared with traditional PE or PVC insulation, it has excellent high-voltage resistance and weather resistance: in terms of electrical performance, XLPE has extremely low dielectric loss (usually <0.002) and high insulation resistance (>1000MΩ·km), which can effectively isolate 11kV high voltage and reduce energy loss during current transmission. It is especially suitable for medium-voltage long-distance power transmission (such as tens of kilometers of distribution lines in urban-rural fringe areas), reducing the line loss rate; in terms of temperature resistance, XLPE can operate at a long-term temperature of up to 90℃ and a short-term overload temperature of up to 130℃, capable of withstanding heat shocks caused by high-temperature exposure in summer and short-term overload of medium-voltage lines, avoiding softening and deformation of the insulation layer; in terms of weather resistance, XLPE forms a three-dimensional network molecular structure after cross-linking treatment, with significantly enhanced UV resistance and ozone aging resistance. In outdoor overhead environments, it can resist insulation embrittlement caused by wind and rain erosion and sudden temperature changes (-40℃ to 90℃), with a service life of more than 25 years, far exceeding that of traditional insulation materials, and reducing the operation and maintenance frequency and cost of medium-voltage lines. In addition, XLPE also has good chemical corrosion resistance, which can resist acid-base pollutants in industrial areas and salt spray erosion in coastal areas, expanding the cable’s adaptability in complex environments.​ From the perspective of scenario adaptability and practical advantages, the characteristics of this cable make it widely applicable in the medium-voltage three-phase power distribution field. In urban medium-voltage distribution backbone lines, the Triplex three-core structure can reduce the occupation of urban space and avoid the visual clutter caused by the erection of multiple single-core cables, adapting to the aesthetic needs of urban infrastructure; in high-voltage power supply lines of industrial parks, the high-voltage resistance and temperature resistance of XLPE insulation can adapt to the intermittent high-load operation of high-power equipment in workshops, ensuring the continuity of production electricity; in power grid connection projects in urban-rural fringe areas, the lightweight and long-span capabilities of aluminum conductors can reduce the occupation of farmland and roads, and reduce the interference of construction on the surrounding environment; in medium-voltage power coverage scenarios in remote areas, the weather resistance and corrosion resistance of the cable can adapt to harsh natural environments such as mountainous areas and plateaus, reducing the workload of later maintenance and lowering the operation and maintenance costs in remote areas.​ In terms of quality assurance, this cable strictly complies with international and domestic medium-voltage overhead cable standards (such as IEC 60502-2 and GB/T 14049), with full-process quality control: in the conductor link, aluminum conductors must pass conductivity, tensile strength, and corrosion resistance tests to ensure they meet the mechanical and electrical requirements of medium-voltage transmission; XLPE insulation materials must pass 1000-hour thermal aging, UV resistance, dielectric loss, and high-voltage breakdown resistance tests (no breakdown for 1 minute under 18kV voltage); the three-core integration process uses automated equipment to accurately control the conductor spacing (3-5mm) and insulation layer thickness (insulation thickness for 11kV grade ≥3.0mm, error ±0.1mm), avoiding insulation weak points caused by defects such as bubbles and impurities. The finished product testing includes voltage withstand test (no breakdown for 1 minute under 11kV rated voltage), insulation resistance test, partial discharge test (partial discharge capacity ≤10pC), conductor DC resistance test, and weather resistance test (simulating 5000 hours of outdoor aging). Only after all tests are qualified can the product leave the factory. In addition, the cable also passes medium-voltage line special tests, such as lightning impulse test (withstanding 100kV impulse voltage) and short-circuit current test, to ensure safe operation under extreme working conditions and provide a solid guarantee for the stability of the medium-voltage three-phase power distribution system.​ Generally speaking, the 11kV Triplex-style ABC overhead cable, with its integrated Triplex three-core design, high-voltage and weather-resistant performance of XLPE insulation, and lightweight advantage of aluminum conductors, perfectly solves the problems of complex erection, large space occupation, and high operation and maintenance costs of traditional medium-voltage single-core cables. It can not only meet the high-voltage and high-reliability requirements of medium-voltage three-phase power distribution but also adapt to construction and operation requirements in different environments. It provides an efficient, safe, and economical solution for medium-voltage power transmission in cities, industrial parks, urban-rural fringe areas, and remote areas, promoting the upgrading of medium-voltage power distribution infrastructure towards higher efficiency, reliability, and environmental protection.