The 34.5kv XLPE insulated medium - voltage cable (Tr - XLPE insulated cable) is a high - performance cable specially designed for the medium - voltage power transmission field. With its excellent electrical performance, reliable insulating materials and wide range of applicable scenarios, it plays an indispensable role in the power system.​ In terms of voltage level, "34.5kv" clearly indicates the rated voltage of the cable, which belongs to the category of medium - voltage cables and is suitable for more important transmission links in medium - voltage distribution networks. It can efficiently realize the power interconnection between substations, the main power access of large industrial parks, and the power output of new energy power stations (such as large wind farms and photovoltaic power stations), providing a stable and reliable channel for medium - distance and large - capacity power transmission. This voltage level enables it to meet high power demands in power transmission without the complex laying and maintenance conditions of high - voltage cables, thus having a good cost - performance ratio.​ "XLPE insulation" is the core advantage of this cable. XLPE, or cross - linked polyethylene, as a high - performance insulating material, has excellent dielectric properties and high insulation resistance. It can effectively resist the risk of electrical breakdown under 34.5kv voltage, ensuring the safety and stability of power transmission. At the same time, XLPE material has excellent temperature resistance, which can work stably for a long time in the ambient temperature range of - 40℃ to 90℃, and can even withstand higher temperatures during short - term overload. It is suitable for industrial environments with large temperature fluctuations, outdoor laying scenarios, etc. In addition, XLPE material has strong chemical stability and is not easy to be affected by corrosive media such as acid, alkali and oil, which greatly prolongs the service life of the cable and reduces maintenance costs.​ "Tr - XLPE insulation" may mean that the cable adopts cross - linked polyethylene insulation technology that has undergone special treatment or improvement. This improvement may further enhance the performance of the insulation layer, such as enhancing aging resistance, improving resistance to partial discharge, or optimizing mechanical strength. The specially treated insulation layer can better adapt to complex working environments. Even under the combined action of electric field, thermal field and mechanical stress during long - term operation, it can maintain good insulation performance and reduce the probability of failure.​ In terms of structural design, the cable usually adopts a multi - layer structure including reasonable conductor, insulation layer, shielding layer and sheath. The conductor is generally made of high - purity copper or aluminum, which has good conductivity, ensuring efficient current transmission and reducing line loss. The shielding layer can evenly distribute the electric field, avoid excessive local electric field strength leading to damage to the insulation layer, and at the same time suppress electromagnetic interference, preventing the cable from having adverse effects on surrounding equipment. The sheath is made of wear - resistant and corrosion - resistant materials, providing effective mechanical protection and environmental protection for the internal structure of the cable, enabling it to adapt to various installation methods such as underground direct burial, pipe laying and overhead.​ In terms of applicable scenarios, the 34.5kv XLPE insulated medium - voltage cable (Tr - XLPE insulated cable) is widely used. In urban power construction, it can be used as a medium - voltage main line to connect substations in various regions and build a stable urban distribution network; in the industrial field, it provides sufficient power support for large factories, manufacturing bases, etc., to meet the electricity demand of various heavy equipment and production lines; in the new energy field, it efficiently transmits the electricity generated by wind farms and photovoltaic power stations to the power grid, helping the utilization of clean energy; in transportation infrastructure, it can be used for power supply in railways, airports and other places to ensure the normal operation of transportation hubs.​ In conclusion, the 34.5kv XLPE insulated medium - voltage cable (Tr - XLPE insulated cable), with its reasonable voltage level, high - quality insulating materials, advanced manufacturing technology and diverse applicable scenarios, has become an ideal choice in the field of medium - voltage power transmission, providing a solid guarantee for the safe, efficient and stable operation of the power system.