A 110kV underground power cable terminal solution is a key part of high-voltage transmission networks, especially in urban areas, industrial zones, and locations where overhead lines are not suitable. Its main function is to provide a safe, reliable, and durable connection between the underground cable and other power equipment such as transformers, switchgear, or overhead line systems. Because 110kV is a high-voltage level, the terminal design must ensure strong electrical insulation, mechanical stability, moisture protection, and long-term operational reliability.The terminal solution typically includes several important components: the cable termination body, stress control elements, insulation materials, shielding layers, sealing parts, and grounding accessories. These parts work together to manage the electric field at the cable end, prevent partial discharge, and avoid insulation breakdown. Stress control is especially important because the electric field becomes concentrated near the cable termination. A well-designed terminal distributes the field evenly and reduces the risk of failure.There are different types of 110kV cable terminals, including outdoor terminals, indoor terminals, and GIS terminations. Outdoor terminals are used where the cable connects to overhead systems or outdoor substations. They must withstand rain, sunlight, wind, pollution, and temperature changes. Indoor terminals are installed inside substations or power rooms and are designed for cleaner and more controlled environments. GIS terminations are used when the cable connects directly to gas-insulated switchgear, requiring compact design and precise sealing performance.Modern 110kV terminal solutions often use advanced materials such as silicone rubber, epoxy resin, and high-grade insulating compounds. Silicone rubber is widely used because of its excellent weather resistance, hydrophobicity, and aging performance. These materials help improve the service life of the terminal and reduce maintenance needs. In addition, pre-fabricated or cold-shrink designs are commonly adopted because they simplify installation and improve consistency. Compared with traditional heat-shrink methods, cold-shrink solutions are easier to install and less dependent on heating equipment, making them suitable for field operations.Installation quality is critical for the success of a 110kV cable terminal. Even the best design can fail if installation is not performed correctly. Cleanliness, accurate stripping dimensions, proper stress cone positioning, secure grounding, and correct sealing are all essential. Therefore, trained technicians and strict commissioning procedures are necessary. After installation, routine inspections such as partial discharge testing, infrared temperature checks, and visual inspection help ensure stable operation.In summary, a 110kV underground power cable terminal solution must combine electrical performance, environmental resistance, mechanical strength, and installation reliability. With the continued growth of smart grids and urban power infrastructure, high-quality cable terminal solutions play an increasingly important role in ensuring safe and efficient power transmission.