While the choice between underground and overhead transmission lines depends on specific project requirements, environmental factors, and budget, there are clear trade-offs.

• Advantages of underground Lines:

  • Aesthetic and Environmental: They eliminate the visual impact of towers and lines, making them ideal for urban, scenic, or environmentally sensitive areas. They also pose no hazard to wildlife or low-flying aircraft.

  • Increased Reliability: Underground lines are shielded from most weather-related disruptions, such as high winds, ice storms, and lightning strikes, leading to fewer outages.

  • Safety: The buried cables reduce the risk of public exposure to live wires and are less susceptible to vehicle accidents or vandalism.

• Disadvantages of Underground Lines:

  • Higher Cost: The installation cost is significantly higher, often 2.5 to 10 times more than overhead lines due to extensive civil works like trenching and the use of specialized insulated cables and backfill materials.

  • Complex Maintenance: Locating and repairing a fault in an underground cable is a time-consuming and labor-intensive process, potentially leading to much longer outage times compared to overhead lines, which can be repaired in hours or days.

  • Heat Dissipation: underground cables have a lower capacity for heat dissipation, which requires the use of larger conductors and specialized thermal materials to prevent overheating.

At Ningbo Changshi, we offer a comprehensive range of Underground cable laying Equipment and tools designed to address these challenges, ensuring efficient and precise installation for a variety of project scales.