ADSS Fiber Optic Cable

The voltage level directly determines the outer sheath material of the ADSS cable. For lines with voltages of 10 – 35 KV, the ordinary PE sheath is sufficient to meet the requirements; for lines with voltages of 110 KV and above, an AT sheath with anti-abrasion properties must be used. This sheath can resist the corrosion of electric arcs and surface leakage currents, and its anti-electric corrosion ability is 8 times that of the ordinary PE sheath. Using cables with incompatible sheath materials will cause the sheath to age and crack rapidly.

Generally, standard ADSS cables can be used for spans less than 300 meters. When the span is between 300 and 600 meters, the structure needs to be optimized, such as increasing the number of aramid yarn bundles and adding a central reinforcement. For spans exceeding 600 meters, custom design is required and achieved through finite element simulation calculations, such as using a high-density aramid yarn and FRP central rod composite scheme to keep the tension within a safe range.

Yes. Special materials and structural designs enable them to adapt to harsh environments. For mountainous areas with temperatures as low as -40°C, low-temperature-resistant sheaths are used to prevent brittleness. For coastal areas, double-layer waterproof sheaths and anti-corrosion coatings are used to resist saltwater erosion. In areas with heavy ice and snow, high-strength aramid yarns are used to ensure that the cables will not break due to the weight of the ice layer.

The installation is relatively simple because it has self-supporting properties and no additional guy wires are needed. Usually, it is installed between towers or poles, and is installed through tensioning and suspension hardware. The key points to note are: Control the constant tension during the traction process to avoid excessive tension that damages the optical fiber core; Ensure that the bending radius of the cable when passing through the pulley does not exceed the limit value; And keep the traction direction straight to prevent local stress concentration at the tower location.

Apart from poor cable quality, it is mainly caused by improper construction operations. For instance, if the tension machine applies excessive tension, if the bending radius of the cable channel is too small, or if ADSS cable is forcibly pulled when passing through obstacles, all these factors can lead to fiber breakage. If multiple fibers break at the same location, it is usually because the cable has been overly bent. Additionally, incorrect pre-winding operation of the tension clamp can also cause the cable to break near the connector.

There are mainly two situations. On one hand, during the production process, excessive tension when the aramid yarn is wound or excessive compression ratio of the sheath mold can cause the optical fibers to be subjected to stretching or lateral pressure, thereby leading to an increase in loss at the 1310 nanometer wavelength. On the other hand, if the cable is overly bent during construction or the bending radius of the cable roll is too small during storage, due to the micro-bending of the optical fibers, the loss at the 1550 nanometer wavelength will increase. This loss can be detected through OTDR testing.