Answer: The height of electrical transmission towers can vary significantly, but they typically range from 15 to 55 meters (49 to 180 feet). Taller towers, sometimes reaching over 300 meters, are used for special applications like crossing large rivers or valleys to maintain the required ground clearance.

The height is determined by a combination of factors, including:

• Voltage Level: Higher voltage lines require more space between conductors and the ground to prevent electrical arcing, so the towers must be taller.

• Conductor Sag: The natural droop of the power lines (sag) must be accounted for. The tower height ensures the conductors remain above the minimum safe clearance from the ground, especially at the midpoint between towers where the sag is greatest.

• Terrain and Span Length: Taller towers are needed to clear obstacles like hills, buildings, or large bodies of water. Longer spans between towers also require greater height to accommodate the increased sag.

Our company, Ningbo Changshi, provides the specialized overhead transmission line (OHTL) wire cable conductor tension stringing equipment needed for the precise and safe erection of these towers and the installation of the high-voltage conductors they support, regardless of their size or location.