The N2xs (F) 2y and N2xs (FL) 2y series AC cables are high-performance cables specially designed for medium and high-voltage power transmission scenarios. They cover multiple voltage levels such as 6/10kv, 12/20kv, and 18/30kv, with specifications including 1X240RM/25 and 1X300RM/25. With their unique structural design and reliable performance, they play an important role in power systems.​ In terms of models, "N2xs" is the basic model of the cable, representing its basic structure and design standards. "(F)" and "(FL)" reflect the special protective properties of the cable. Among them, "F" may indicate that the cable has anti-corrosion, waterproof and other characteristics, suitable for humid environments with many corrosive media, such as underground tunnels and chemical industrial parks. "FL" is likely to mean enhanced fire resistance, which can maintain normal operation for a certain period of time in high-temperature or fire environments, buying time for personnel evacuation and emergency treatment. Therefore, it is often used in high-rise buildings, subways, power plants and other places with extremely high fire protection requirements. "2y" may be related to the laying method or the number of structural layers of the cable, ensuring the stability and safety of the cable under specific installation conditions.​ In terms of specifications, "1X" indicates that the cable is of a single-core structure. This design can effectively reduce electromagnetic interference inside the cable and improve the stability of power transmission. It is especially suitable for transmitting a single-phase current in a high-voltage system, facilitating phase separation laying in complex power networks. In "240RM/25" and "300RM/25", "240" and "300" refer to the cross-sectional area of the conductor (unit: square millimeters). The larger the cross-sectional area, the higher the current-carrying capacity of the cable, which can meet the power transmission needs of different powers. The 240-square-millimeter conductor is suitable for medium-power transmission, while the 300-square-millimeter one can cope with larger power scenarios. "RM" may represent the type of conductor or the characteristics of the insulating material, ensuring the conductive performance of the conductor and the insulating effect. "25" may be the size parameter of the insulation layer or other key structures, ensuring that the cable has sufficient insulation strength to resist the risk of electrical breakdown under the corresponding voltage level.​ The voltage levels cover 6/10kv, 12/20kv, and 18/30kv, enabling it to adapt to power transmission needs of different scales. 6/10kv is suitable for urban distribution networks, internal power supply in industrial parks and other scenarios; 12/20kv can be used to connect regional substations with larger industrial users or commercial complexes; 18/30kv is more suitable for long-distance medium and high-voltage power transmission, such as power networking between cities or power transmission in large energy projects.​ In conclusion, the N2xs (F) 2y and N2xs (FL) 2y series AC cables, with their diverse voltage levels, flexible specification options and targeted protective properties, can be widely used in various complex power transmission environments, providing a solid guarantee for the safe and stable operation of power systems.