In ADSS optical cables, flat FRP (glass fiber reinforced plastic) is used as the armor layer. Compared to traditional circular FRP central reinforcement or other metal armor, it has the following significant advantages:
Core Advantages of Flat FRP Armored ADSS Optical Cables
Enhanced Lateral Pressure and Bending Resistance: The cross-sectional shape of flat FRP allows for more even stress distribution when the optical cable is subjected to external lateral pressure (such as being clamped during construction, bitten by animals, or squeezed by ice), significantly improving the cable's lateral pressure resistance. Simultaneously, its structure is less prone to bending and breakage than circular FRP, improving the mechanical reliability of the cable in complex laying environments (such as crossing valleys or traversing forests).
Improved Resistance to Tracking and Electrolytic Corrosion: As an all-non-metallic material, flat FRP itself has excellent electrical insulation properties. When used in conjunction with an anti-tracking (AT) outer sheath, it can effectively prevent the sheath from "electro-erosion" caused by corona discharge in high-voltage electric fields (>12kV), extending the service life of the optical cable near 500kV ultra-high-voltage transmission lines.