ADSS cable is loose tube stranded. The 250um bare fibers are positioned into a loose tube made of high modulus plastics. The tubes are filled with a water-resistant filling compound. The tubes and fillers are stranded around a FRP (Fiber Reinforced Plastic) as a non-metallic central strength member into a compact and circular cable core. After the cable core is filled with filling compound. It is covered with thin PE (polyethylene) inner sheath. After stranded layer of armaid yarns are applied over the inner sheath as strength member, the cable is completed with PE or AT (anti-tracking) outer sheath.
Types of the ADSS cables
ADSS cables, distinct for not using any metal wires, utilize optical fibers that are either housed in loose buffer tubes or arranged in a ribbon-like configuration. To ensure minimal strain on the fibers, the design typically includes excess slack in the fibers compared to the length of the cable's supporting structure.
For installations requiring longer spans, a prevalent design incorporates aramid fiber yarns for strength. These yarns are coated to prevent water absorption. Surrounding this strength layer is a core composed of several buffer tubes, each containing multiple fibers, which in turn encircle a central plastic core.
An external sheath encases the entire structure, offering protection against water ingress and sunlight exposure.
The types of ADSS (All-Dielectric Self-Supporting) cable can primarily be differentiated based on their sheathing or jacketing, with the most common variations being single sheath and double sheath designs. Here's a brief overview of each:
Construction:
This type features a single outer jacket layer. Lightweight: It's typically lighter than double sheath variants.
Applications:
Ideal for environments with lower risk of mechanical damage or where cable weight is a critical factor.
Cost-Efficient:
Generally more cost-effective due to less material usage.
Environmental Resistance:
Offers sufficient protection against UV rays, moisture, and minor abrasions.
Construction:
Equipped with two layers of sheathing, an inner and an outer jacket.
Enhanced Protection:
Provides better mechanical protection, making it suitable for harsher environments.
Durability:
More resistant to abrasion, rodents, and other forms of physical damage.
Weight and Cost:
Heavier and typically more expensive than single sheath cables due to additional materials.
Applications:
Preferred in areas with higher potential for mechanical stress, such as regions with dense vegetation or frequent severe weather.
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