The 660/1000 V Avbbshv Ng-Ls and Vbbshv Ng-Ls power cables are two types of dedicated cables suitable for low-voltage distribution systems, with a rated voltage of 660V/1000V. They are widely used in power transmission and distribution in industrial, construction, energy, and other fields. The two cables have both commonalities and differences in structural design, with high-performance materials as the core, and both have reliable electrical performance, mechanical strength, and environmental adaptability, which can meet the safe power transmission requirements in complex scenarios.​ In terms of conductor materials, Vbbshv Ng-Ls uses high-purity copper conductors (purity ≥99.9%). The excellent conductivity of copper can control the DC resistance at an extremely low level (e.g., ≤1.83Ω/km for 10mm² cross-sectional conductors), which can effectively reduce transmission losses and ensure efficient current transmission, especially suitable for occasions with high requirements for conduction efficiency and stability. Avbbshv Ng-Ls uses high-purity aluminum conductors (purity ≥99.5%). Aluminum conductors are only about 1/3 the weight of copper, with lower costs, and the dense oxide film formed on the surface endows them with good corrosion resistance, making them suitable for long-distance laying or scenarios with prominent lightweight requirements. The conductors of both cables adopt a multi-strand stranded structure, which enhances flexibility, with a minimum bending radius of 6-10 times the cable outer diameter, facilitating installation in narrow spaces or complex environments.​ The insulation and sheath system is the core advantage of the two cables. Both use insulation materials with high temperature resistance levels, with a long-term working temperature of up to 90℃, and a temperature resistance of up to 250℃ in case of short circuits (within 5 seconds), far exceeding the temperature resistance limit of conventional PVC cables. The insulation layer has an insulation resistance of ≥10¹⁴Ω·m, which can effectively isolate the conductor from the outside world and prevent electric leakage or breakdown. The outer sheath is made of flame-retardant materials, complying with the GB/T 18380 flame retardant standard, which can slow down the spread of flames in case of fire, and has acid-alkali resistance and oil resistance, able to adapt to harsh environments such as dusty and humid conditions. In addition, the "Ng-Ls" label indicates that both cables have passed the low-smoke halogen-free certification, with low smoke concentration and low toxicity when burned, making them particularly suitable for densely populated places (such as shopping malls, hospitals) and enclosed spaces (such as subways, tunnels).​ In terms of structural design, both cables adopt a composite structure of "conductor + insulation layer + shielding layer + sheath". The shielding layer is made of semi-conductive materials, which can evenly distribute the electric field, reduce the risk of partial discharge, and improve the stability of cable operation. The difference is mainly reflected in the performance focus brought by the conductor material: Vbbshv Ng-Ls, relying on the high conductivity of copper conductors, has a current-carrying capacity about 20% higher than that of Avbbshv Ng-Ls with the same cross-section (e.g., 16mm² copper conductor has a current-carrying capacity of about 70A, and aluminum conductor about 58A), suitable for power supply of high-load equipment; Avbbshv Ng-Ls, on the other hand, features lightweight and low cost, more suitable for long-distance transmission lines or cost-sensitive projects.​ In terms of application scenarios, Vbbshv Ng-Ls is often used for power supply of precision equipment and automated production lines in industrial plants, as well as distribution trunks in high-rise buildings, which can meet high stability requirements; Avbbshv Ng-Ls is widely used in rural power grid transformation, outdoor photovoltaic power station connecting lines, temporary construction power supply and other scenarios, ensuring transmission efficiency while reducing project costs. The low-smoke halogen-free characteristics of both make them the first choice in places with extremely high safety requirements such as subways, hospitals, and data centers, which can minimize casualties and equipment losses in case of fire.​ In summary, the 660/1000 V Avbbshv Ng-Ls and Vbbshv Ng-Ls power cables form a product combination covering different load, cost, and environmental requirements through the differentiated design of conductor materials. With efficient, safe, and environmentally friendly characteristics, they provide a reliable power transmission solution for low-voltage distribution systems.