An 110 kV overhead line is a high-voltage system used for regional power transmission. Its design and components are engineered to handle the greater electrical stress and mechanical loads compared to lower-voltage distribution lines. Key components include:

• Towers (Supporting Structures): These are typically steel lattice towers or concrete poles, which are significantly taller and more robust than those used for distribution lines. They are designed to withstand high winds, ice accumulation, and the heavy weight and tension of the conductors.

• Conductors: These are typically ACSR (Aluminum Conductor Steel Reinforced), chosen for its excellent strength-to-weight ratio. For 110 kV lines, a single conductor per phase is common, but in some cases, bundled conductors (two wires per phase) are used to increase current capacity and reduce electrical losses.

• Insulators: Insulators are essential for isolating the energized conductors from the grounded tower. For 110 kV, a suspension insulator string made of multiple porcelain or glass discs, or a single composite insulator, is used. The number of discs is determined by the voltage, environmental pollution, and climate.

• Ground Wires: A single ground wire (or shield wire) is often installed at the top of the tower to protect the phase conductors from lightning strikes. An OPGW (Optical Ground Wire) is a common type, which also contains fiber optic cables for grid communication.