Professional Answer: Overhead transmission lines offer several significant advantages that make them the most widely used method for power transmission:

• Cost-Effectiveness: They are considerably less expensive to build and maintain than underground cables.

• Ease of Installation: Construction is generally faster and less complex, making it possible to traverse various terrains with relative ease.

• Maintenance and Repair: Faults are easier to visually locate and repair, leading to shorter service restoration times.

However, they do have some disadvantages:

• Vulnerability: overhead lines are exposed to the elements, making them susceptible to damage from severe weather, falling trees, and wildlife.

• Aesthetics: They can be considered visually intrusive, particularly in scenic areas.

At Ningbo Changshi, we provide high-quality equipment and tools that enhance the reliability and durability of overhead transmission line systems, mitigating many of the inherent risks.