ADSS (All Dielectric Self-Supporting) optical cable is also often referred to as all dielectric self-supporting fibre optic cable. All Dielectric means that the ADSS fibre optic cable uses all dielectric materials. Self-supporting means that the cable reinforcement is able to withstand its own weight and external loads. ADSS fibre optic cable is mainly used in utility pole frames and therefore requires a high mechanical strength to withstand the impact of a strong electrical environment. Boersen will briefly introduce the structure and features of ADSS fibre optic cable.
ADSS cable is a type of fiber optic cable that is strong enough to support itself between structures without containing conductive metal elements. Both single mode and multimode fibers can be arranged in ADSS cables with a maximum of 144 fibers. ADSS fiber optic cable is designed for outside plant aerial and duct applications in local and campus network loop architectures from pole-to-building to town-to-town installations. The cabling system that includes cables, overhangs, dead ends and termination enclosures provide an integrated transmission circuit infrastructure with high reliability performance.
Dead-end for Medium/Long Span ADSS
The construction of ADSS fibre optic cables can be divided into two main categories: centre tube construction and stranded construction. In the centre tube design, the optical fibre is placed in a length of PBT loose tubing filled with a water-blocking material. Then, depending on the required tensile strength, an aramid filament is wound and extruded with a PE (≤110KV electric field strength) or AT (≥100KV electric field strength) jacket. This structure is characterised by its small diameter and light weight, but is limited in length.
In this structure, the optical fiber is placed inside a PBT tube filled with a certain residual length of water-blocking ointment, while winding a suitable amount of fine yarn according to the required tensile strength, and then extruded with PE (≤110KV electric field strength) or AT (≥100KV electric field strength) sheath.
Dead-end for Medium/Long Span ADSS
The layer-stranded structure ADSS optical cable is that the inner optical fiber and water-blocking grease are added into optical fiber loose tube at the same time, and then different loose tubes are wound around the central reinforcement (usually FRP).
Depending on the environmental conditions in which the ADSS fibre optic cable is laid, ADSS fibre optic cable can be produced with a single PE or AT sheath or a double PE or AT sheath.
This construction of ADSS fibre optic cable with loose sleeving and grease filled central reinforcement completely stranded together guarantees its water resistance and, depending on the requirements, a variety of lateral pressure resistance measures.
Compared to the two different structures of ADSS fibre optic cable, the advantages of the central tube structure ADSS fibre optic cable are: small diameter, light weight, good waterproof performance, low price and easy installation. The laminated stranded structure has more laying methods and is suitable for overhead, direct burial, pipeline, underwater and other occasions. The remaining length is easy to control and the number of cores is higher, but it is also more expensive.
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