In power transmission systems, ACSR is a widely used overhead wire. Preformed armour rods for ACSR conductor are important protective components for ACSR conductors. Through structural design and material selection, the safety performance of power lines can be improved from multiple angles. Protecting the line can not only effectively alleviate the damage of the wire in a complex environment, but also extend the service life of the line and reduce the risk of operation and maintenance.
Preformed armour rods for ACSR conductor significantly improves the resistance of ACSR conductors to mechanical damage by optimizing the force structure. The ACSR conductor is composed of an internal steel core and an outer aluminum strand. It is easy to cause damage due to external mechanical forces during erection and operation. For example, the friction between the wire and the pulley when the wire is released causes the aluminum strand to wear out, and fatigue damage is caused by wind swing and the collision of the tower fittings during long-term operation. Preformed armour rods for ACSR conductor are made of high-strength aluminum alloy material and are made into a spiral structure by preformed molding process. When installed, they are tightly wound on the outer layer of the ACSR conductor to form a uniform wrapping protection. This spiral structure can disperse the local concentrated stress to a wider range of wires, preventing the wires from breaking strands due to excessive local force. At the same time, the surface of the guard line is smoothed, which can reduce the coefficient of friction when the wire is in contact with external objects and reduce the probability of wear.
Preformed armour rods for ACSR conductor can optimize the electrical performance of ACSR conductors and reduce the risk of electrical failures in line operation. During the long-term operation of the ACSR conductor, the outer aluminum strand may have uneven surface due to corrosion, oxidation, etc., resulting in corona discharge of the wire at high voltage. Corona discharge will not only cause power loss, but also produce electromagnetic interference and ozone, which will accelerate the aging of wire insulation. Preformed armour rods for ACSR conductor and ACSR conductor are closely bonded, the surface of the guard line is smooth and the electrical conductivity is good, which can reduce the electric field distortion on the surface of the wire and reduce the intensity of corona discharge. In addition, the protective line can effectively prevent rain, dust and other impurities from attaching to the surface of the wire, prevent the formation of local electric field concentration due to the accumulation of impurities, and reduce the occurrence of electrical faults such as short circuits and flashovers. Under severe weather conditions such as icing and fog, the protective line can also reduce the formation of ice edges and water droplets on the surface of the wire, and reduce the probability of tripping the line due to ice and snow bridging or fog flashes.
Preformed armour rods for ACSR conductor also indirectly improves the overall safety level of power lines by extending the service life of ACSR conductors. The service life of ACSR conductors is affected by a variety of factors, such as mechanical damage, corrosion, fatigue, etc., and the aging of the conductors will lead to a decrease in carrying capacity and increase the risk of line failure. Preformed armour rods for ACSR conductor through comprehensive protection of the wire, reduces the erosion of the wire by various damage factors and delays the aging process of the wire. At the same time, the installation of the preformed guardrail adopts a tool-free and cold construction method, without fire or complex mechanical operation, which reduces the safety risks in the installation process.