Helical armor rods for overhead line
Helical armor rods are key protective components in overhead power and communication lines, typically made of aluminum alloy or high-strength steel with a helical design. Their primary role is to safeguard conductors or optical cables: by tightly wrapping around the line, they distribute stress at contact points with hardware (e.g., insulators, clamps), preventing fatigue damage from wind vibration, thermal expansion/contraction, etc. They also resist external abrasion, corrosion, and bird pecking, extending the line's lifespan. Easy to install without damaging the line itself, they’re widely used in critical connection sections of high-voltage transmission lines and communication cables.
Vilun preformed armor rods are engineered with high-purity 6061 aluminum alloy wire, delivering outstanding durability, stable electrical conductivity and superior mechanical strength for overhead power line protection. Adopting precision one-step cold twisting technology, each rod features a standard helix pitch and smooth surface, enabling a seamless, gap-free fit with ACSR, AAAC, OPGW and earth wires of various specifications. Effectively solving common line faults caused by aeolian vibration, wind galloping and lightning impact, the product evenly disperses external stress to avoid conductor strand breakage and surface abrasion. Fully compliant with IEC, ANSI and GB international standards, these armor rods feature excellent salt fog resistance, high temperature resistance and anti-corrosion performance, adapting perfectly to coastal, mountainous, desert and other harsh outdoor working environments. Simple tool-free installation greatly improves construction efficiency, while the unique sacrificial protection structure extends conductor service life significantly. Ideal for new grid construction and old line renovation, it is a cost-effective, reliable hardware solution for global power transmission and distribution projects.
| Catalogue Number | Diameter Range | Length | Average Weight(kg) | Color Code | |
| Min. | Max. | (mm) | |||
| AR-0123 | 13.3 | 14.0 | 1470 | 0.7 | Black |
| AR-0124 | 14.1 | 14.8 | 1520 | 0.8 | Red |
| AR-0125 | 14.9 | 15.3 | 1580 | 0.9 | Black |
| AR-0126 | 15.4 | 16.0 | 1630 | 1.0 | Purple |
| AR-0127 | 16.1 | 16.6 | 1660 | 1.0 | Red |
| AR-0128 | 16.7 | 17.2 | 1680 | 1.1 | Brown |
| AR-0129 | 17.3 | 17.8 | 1730 | 1.3 | Blue |
| AR-0130 | 17.9 | 18.8 | 1830 | 1.4 | Green |
| AR-0131 | 18.9 | 19.8 | 1830 | 1.5 | Orange |
| AR-0132 | 19.9 | 20.6 | 1930 | 2.0 | Purple |
| AR-0133 | 20.7 | 21.4 | 1930 | 2.0 | Red |
| AR-0134 | 21.5 | 23.0 | 1980 | 2.2 | Blue |
| AR-0135 | 23.1 | 23.6 | 2030 | 2.5 | Green |
| AR-0136 | 23.7 | 24.7 | 2230 | 2.7 | White |
| AR-0137 | 24.8 | 25.8 | 2340 | 2.5 | Yellow |
| AR-0138 | 25.9 | 26.2 | 2380 | 4.2 | Brown |
| AR-0139 | 26.3 | 27.0 | 2430 | 4.2 | Blue |
| AR-0140 | 27.1 | 27.8 | 2430 | 4.2 | Green |
| AR-0141 | 27.9 | 28.9 | 2540 | 4.7 | Orange |
| AR-0142 | 29.0 | 29.4 | 2540 | 4.8 | Purple |
| AR-0143 | 29.5 | 30.6 | 2540 | 5.2 | Red |
| AR-0144 | 30.7 | 32.2 | 2540 | 5.8 | Black |
| AR-0145 | 30.3 | 33.7 | 2540 | 5.9 | White |
| AR-0146 | 33.7 | 35.3 | 2540 | 6.2 | Yellow |
Company Introduction
Vilun Electric Co., Ltd is a professional manufacturer for helical-formed fittings and laser equipments. It is a high-tech electric power equipment materials manufacturer with research, production and sales for core products of helical formed power fittings,helical-formed optical fiber fittings and power switchgear.
It is guaranteed the company's products safety and reliability by scientific production technology, professional techinical personnel, perfect quality assurance system, and advanced test and inspection equipments. Vilun has already obtained the production license power fittings,license of power facilities contractor by national technical supervision and inspection organization;And also through the ISO9000 quality management system authentication.
The main products of Vilun are: helical-formed tension clamp for conductor, helical-formed suspension clamp for conductor, guy end grip,helical-formed fittings for ADSS fiber optical cables, helical-formed fittings for OPGW fiber optical cables, helical-formed splicing,helical-formed spiral vibration clamp,helical-formed vibration damper，laser welding machine,laser marking machine,laser cutting machine and so on.
The special spiral helical-formed product design,makes our helical formed fittings have the benefit of easy installation,reliable performance,anticorrosion,anti-fatigue and guarantee the installation quality easily. It can improve the protection of line and reduce the influence to the line under guarantee the requirement of design.Vilun's products have applied to power transmission and distribution of power system companies widely,and get extensive praise after many years application on lines.Vilun's products have sold to many countries in Europe and America, Asia,Africa, Oceania.
Holding on the principle of "develop with technique,subsist with quality',the company provides the customers with first-class products, fine pre-sale and post sales service. "The pursuit of excellence,and create the future together ",all staff in Changchun Vilun will continue devote us to developing power transmission and distribution fitting with all world power enterprises.
