
What are the main components of an overhead transmission line (OHTL) and what is the function of each?
2025-08-12An overhead transmission line is a complex system designed for efficient and safe power delivery. Its main components work together to ensure reliable operation. As a leading manufacturer, we provide the following:
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Conductors: These are the wires that carry the electric current. Typically made of ACSR (Aluminum Conductor Steel Reinforced), they are chosen for their excellent conductivity, lightweight nature, and high tensile strength to span long distances between towers.
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Supports: These are the structures, such as lattice towers or monopoles, that hold the conductors at a safe height above the ground. Their design is critical for withstanding the mechanical stresses from the conductors, wind, and ice.
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Insulators: Made of materials like porcelain or glass, insulators are crucial for preventing the electrical current from leaking from the conductors to the support structures. They are designed to withstand high voltages and environmental stress, ensuring the safety and efficiency of the line.
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Ground Wires: Also known as shield wires, these are positioned at the very top of the towers to protect the main conductors from lightning strikes by providing a direct path to the ground.
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Hardware and Fittings: This category includes a wide array of accessories, such as clamps, spacers, and vibration dampers, that connect the conductors to the insulators and towers, manage conductor movement, and prevent mechanical damage.