How do overhead and underground power transmission systems compare?

2025-08-17

Electricity can be transmitted through conductors either above or below the ground. The choice between overhead and underground systems depends on factors like cost, environment, safety, and capacity.

  • Overhead Transmission: This is the most common and cost-effective method for long-distance transmission. It involves bare conductors suspended from poles or lattice towers. Its advantages include lower installation costs, easier maintenance, and higher capacity for bulk power transfer. However, it is vulnerable to weather events and has a significant visual impact.

  • underground Transmission: This method involves insulated cables buried in trenches, ducts, or tunnels. It is more expensive to install but offers a higher level of public safety, is protected from extreme weather, and has a minimal visual footprint. It is the preferred choice for densely populated urban areas, sensitive natural environments, and river or sea crossings.

Our comprehensive product line includes both Overhead Transmission line equipment for the construction of towers and stringing overhead conductors, and a complete suite of Underground cable laying Equipment for projects that require power to be delivered beneath the ground.

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