Overhead power and communication lines often face challenges such as wind-induced vibration, thermal expansion and contraction, external abrasion, and corrosion. These factors can cause cable damage, strand breakage, or even system failures. Helical armor rods for overhead line, also called pre-formed armor rods, provide a simple and effective solution. By tightly wrapping around cables near support points, they distribute stress and absorb vibration, helping to significantly extend the service life of cables.
Structure of Helical Armor Rods:
Helical armor rods for overhead lines are usually made from aluminum alloy or aluminum-clad steel wire, shaped into a spiral structure. Their main purpose is to provide an extra protective layer where cables contact hardware such as suspension clamps, tension clamps, or insulators.
How Helical Armor Rods Protect Cables:
Stress distribution: Cables tend to experience concentrated stress at support points, which can lead to deformation or damage. Helical armor rods spread the force along a longer cable section, reducing local pressure and minimizing the risk of crushing or bending.
Vibration absorption: Outdoor cables are often affected by wind, causing small high-frequency oscillations over time. The spiral design of Helical armor rods for overhead line absorbs vibration energy, reducing the impact of micro-movements and secondary span oscillations, which helps prevent fatigue damage accumulation.
External protection: They protect against abrasion, bird pecking, corrosion, and electrical corona, making them ideal for mountainous or coastal areas.
Repair capability: Lightly damaged cables can be reinforced quickly using armor rods, restoring mechanical strength and protection.
Easy installation: No special tools are needed. The rods can be manually wrapped without harming the cable itself.
Vilun’s Helical armor rods for overhead line using high-quality aluminum alloy. They are designed for easy installation, corrosion resistance, and fatigue durability. The rods cover diameters from 7.85 mm to 35.31 mm, suitable for different conductors like ACSR or LGJ series. Lengths and weights can be customized to ensure compatibility with various cable types. With years of practical use in power transmission and distribution projects, our products are well-regarded for helping lines withstand environmental challenges.
Vilun Electric Co., Ltd, established in 2003, is a professional manufacturer specializing in spiral-formed power line hardware. The company is ISO 9000 certified and holds multiple production licenses for power accessories. With advanced technology and strict quality control, Vilun ensures reliable and high-performance products. For more information or to discuss solutions, feel free to contact us.
