1.OPGW Fiber Composite Ground Cable
The productsOPGW They integrate the functions of ground wire and optical communication, and are mainly used for communication lines of new overhead high-voltage transmission systems of 35KV and above, and can also be used to replace the existing ground wires of old overhead systems high voltage transmission. , increase optical communication lines and conduct short circuit currents and provide lightning protection.
Structural characteristics of productsOPGW : fiber optic unit of stainless steel tube and aluminum clad copper wire, aluminum alloy wire stranded and cabling; The stainless steel tube fiber optic unit is located in the center or the inner layer of the braided layer.
2.MASS metal self-supporting optical cable
Self-supporting metal cable MASS (MetalAerialSelfSupporting). From a structural point of view, MASS is consistent with the OPGW of the core tube single-layer stranded wire. If there is no special requirement, the metal stranded wire is generally made of galvanized steel wire, so the structure It is simple and the price is low. MASS is a product between OPGW and ADSS. When MASS is used as a self-supporting optical cable, the primary considerations are strength and sag, as well as the safety distance from adjacent ground conductors/cables and the ground. It does not need to consider short circuit current and heat capacity like OPGW, nor does it need to consider insulation, current carrying capacity and impedance like OPPC, and does not need to consider the field strength of the installation point like ADSS. The function of the outer metal strand is only to accommodate and protect the optical fiber. In the case of similar breaking strength, although MASS is heavier than ADSS, its outer diameter is about 1/4 smaller than the ADSS core tube and about 1/3 smaller than the layered ADSS. In the case of similar diameter, the breaking strength and allowable stress of ADSS are much lower than those of MASS.
Post time: Feb-09-2023
