Generally, there are three types of non-metallic aerial optical cables, GYFTY, GYFTS, and GYFTA. If it is non-metallic and unarmoured, it is GYFTY, a layer-stranded non-metallic non-metallic optical cable, which is suitable for electric power, as a guide, and as a lead-in optical cable. GYFTA is a non-metallic reinforced core, aluminum armored optical cable. GYFTS is a non-metallic reinforced core, steel armored fiber optic cable.
GYFTY optical cable adopts loose-tube stranded structure. The optical fiber is inserted into a loose tube made of high-modulus polyester material, and the tube is filled with waterproof compound. Loose tubes (and filler ropes) are stranded around a non-metallic central reinforcement (FRP) to form a compact cable core, and the gaps in the core are filled with water-blocking grease. Extruded polyethylene sheath outside the cable core.
GYFTA optical cable adopts a loose-tube layer-stranded structure. The optical fiber is inserted into a loose tube made of high-modulus polyester material, and the tube is filled with waterproof compound. Loose tubes (and filler ropes) are stranded around a non-metallic central reinforcement (FRP) to form a compact cable core, and the gaps in the core are filled with water-blocking grease. The outer aluminum armor of the cable core is longitudinally wrapped, and then extruded into a polyethylene sheath. GYFTS is the same structure as GYFTA, which is to replace the aluminum armor with double-sided coated steel strips.
There is no metal substance in the structure of GYFTY, which is suitable for lightning areas, high voltage areas, and places with severe electromagnetic interference. Generally, GYFTA and GYFTS optical cables can also be used for electric power, where the environmental requirements are not high. Non-metallic FRP central strengthening core, good tensile performance, anti-conductive optical cable product features: non-metallic (FRP) reinforcement, suitable for lightning areas, high-voltage areas, lightning protection; tensile, abrasion, flattening, anti- Impact, repeated bending, twisting, winding, bending (bending angle not exceeding 90°), gunshot, etc., have good mechanical properties; stable temperature cycle, complete sheath, anti-seepage water dripping, flame retardant and other good environments Performance; Precisely controlled fiber excess length and cable stranding pitch ensure the cable has excellent tensile performance and temperature characteristics; expected life is greater than 30 years. Light weight, small cable diameter, and small load on the tower.