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From the point of view of structure and material, the guard line is made of multiple strands of high-strength aluminum alloy prefabricated into a spiral structure. Each strand is heat-treated and formed, which can make the spiral arc and the outer diameter of the wire highly match. This preformed design is different from the traditional rigid wire protection fittings. Its flexible structure can closely fit the surface of the wire to avoid the local stress concentration of the wire caused by rigid contact.

The use of the flexible bonding characteristics of the pre-twisted structure to absorb vibration energy is the main method to reduce the vibration of the conductor. Dispersing vibration stress through precise installation location planning is an important way to improve the damping effect. Combining conductor parameters and environmental conditions to select the appropriate helical armor rods for overhead line model is the basis for effective damping.

​Protecting the wire from physical damage and environmental erosion is the most basic purpose of helical armor rods for overhead line. Improving the mechanical properties and operating stability of transmission lines is another purpose of helical armor rods for overhead line. Reducing the operation and maintenance costs and safety risks of transmission lines is an important purpose of helical armor rods for overhead line from the perspective of practical application.