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OPGW FAQS

BY Hunan GL Technology Co.,Ltd.

POST ON:2021-04-22

VIEWS 35 Times


OPGW FAQS

Optical cable colleagues, if anyone asks what OPGW optical cable is, please answer like this:

1. What are the common structures of optical cables?
The common optical cable structure of optical cable has two kinds of stranded type and skeleton type.

2. What is the main composition?
The optical cable is mainly composed of: fiber core, optical fiber grease, sheath material, PBT (polybutylene terephthalate) and other materials.

3.What is the armor of the optical cable?
The armoring of the optical cable refers to the protective element (usually steel wire or steel tape) used in special-purpose optical cables (such as submarine optical cables, etc.). The armor is attached to the inner sheath of the optical cable.

4. What material is used for the cable sheath?
The sheath or layer of the optical cable is usually composed of polyethylene (PE) and polyvinyl chloride (PVC) materials, and its function is to protect the cable core from external influences.

5. What are the special optical cables used in power systems?
There are mainly three types of special optical cables used in power systems: ground wire composite optical cable (OPGW), wound optical cable (GWWOP), and self-supporting optical cable (ADSS). 

Ground wire composite optical cable (OPGW), the optical fiber is placed in the power line of the steel-clad aluminum strand structure. The application of OPGW optical cable plays a dual function of grounding and communication, effectively improving The utilization rate of power poles is increased.Wrapped optical cable (GWWOP), where there is a power transmission line, the optical cable is wound or suspended on the ground wire. I heard that the 6-core optical cable is more expensive than the 6-core optical cable, if you want to get more understanding.The self-supporting optical cable (ADSS) has strong tensile strength and can be hung directly between two power poles with a maximum span of up to 1500m.

6. What are the application structures of OPGW optical cables?
The application structure of OPGW optical cable mainly includes: plastic tube layer stranding + aluminum tube structure, central plastic tube + aluminum tube structure, aluminum skeleton structure, spiral aluminum tube structure, single layer Rusty steel pipe structure, central stainless steel pipe structure, stainless steel pipe layered structure, composite stainless steel pipe structure, central stainless steel pipe structure, stainless steel pipe layered structure.
7. What is the main composition of the stranded wire outside the cable core?
The stranded wire outside the core of the OPGW optical cable is mainly composed of AA wire (aluminum alloy wire) and AS wire (aluminum clad steel wire).

8. What are the technical conditions for choosing OPGW cable model?
1) The nominal tensile strength (RTS) (kN) of OPGW optical cable;
2) Number of fiber cores (SM) of OPGW cable;
3) Short-circuit current (kA);
4) Short circuit time (s);
5) Temperature range (℃).

9.How to limit the bending degree of optical cable?
The bending radius of the optical cable should not be less than 20 times the outer diameter of the optical cable, and during the construction process (non-stationary state) no less than 30 times the outer diameter of the optical cable.

10. What should be paid attention to in the project?
There are three key technologies in ADSS optical cable engineering: optical cable mechanical design, determination of suspension points, and selection and installation of supporting hardware.

11. What are the main optical cable fittings?
Optical cable fittings refer to the hardware used to install the optical cable, mainly including: strain clamp, suspension clamp, vibration isolator, etc.

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