During the transmission line installation, choosing cables that can withstand environmental hazards such as storms, rain, etc., is imperative. Moreover, they should be strong enough to support the installation length.
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Along with that, as a precautionary measure, you must check the product quality and tensility. Keeping all these factors in mind, the most used are OPGW cables. And, if someone looks for an alternative, then ADSS cables would be a suitable choice.
But, here, the query arises – which is better? OPGW or ADSS?
The electric utility industry primarily relies on OPGW cables, also known as Optical Ground Wire. And, it is one of the most recommended cables for a secured top position transmission line. There is also an alternative to OPGW available in the market named the ADSS cable, also known as the All-Dielectric Self-Supporting cable.
How do they differ!!!
The manufacturing of these cables is based on two functions: an aerial conductor and an integrated fiber-optic unit. Here lies the difference – the aerial conductor protects the conductors from lighting.
Other than that, OPGW’s integrated fiber optics provide a telecommunication path for third-party communication, including internal ones. It is a dual-functioning cable and is a popular replacement for earth wires or traditional static wires. The OPGW hardware fittings are readily available and easy to install.
If we go by the IEEE (Institute of Electrical and Electronics Engineers) standard, it is also known as the optical fiber composite overhead ground wire. It is meant to combine the functions of grounding and communications. You can also use these cables when there is a dire need to change the existing ground wire that requires immediate replacement.
These optical cables are strong enough to support the structure of transmission lines and are ideal for distribution. Moreover, it can withstand natural calamities and environmental hazards. This makes it a much better choice in comparison with other cables.
This is a non-metallic cable, and there is no requirement of lashing wires to support it externally. The major benefit is that you can place these cables in a conduit. The installation of the ADSS cables on the existing transmission line makes it cost-effective. Moreover, it is also independent of power lines and provides support through maintenance.
Be it OPGW or ADSS; these cables provide a quick installation process. And, being fiber optic cables, these are not even there is no involvement of electromagnetic effects. All you need to do is attach them to the poles or dig trenches to bury them deep underground. If the circumstances remain favorable, then you can install about 1 km – 5 km of fiber cables within a day.
These cables were developed to ensure security; since , the installation has been in demand. At the same time, they are reliable, and power utilities can depend on these cables to transmit critical communication by controlling the electricity network. Moreover, to shield it against theft and vandalism, these cables are protected by the proximity effects of power conductors.
Usually, overhead fiber cables help in cost-cutting as they are safe to use and do not require additional aid to secure them. Even though it costs much more than the underground cables, it doesn’t need additional support. Thus, making it a feasible choice and increasing the installation rate.
This also gives an advantage over the quick build of the network and provides early service. If we sum up, OPGW and ADSS cables offer a high investment return and reduce the initial cost.
Choosing the perfect cables for overhead transmission lines might get confusing. Thus, you need to stick to the key aspects such as cabling designs, environment and installation cost. If you are dealing with new cables and have to construct the entire transmission system from scratch, then OPGW would be suitable.
ADSS (All-dielectric Self-supporting) optical fibre cable is atype of self-supporting aerial fiber optic cable designed for aerial installation and deployment and is suitable for various outdoor applications. This thorough overview will cover the definition, structure, benefits, and applications of ADSS fiber cables.
All-dielectric self-supporting optic cable is another name for ADSS fiber optic cable. There are two modes in optical fiber; single-mode and multimode fiber.
The self-supporting type indicates that the optic cable’s reinforcing member can withstand its weight and external load, has high mechanical strength, and can withstand the strong electric environment’s impact.
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A comprehensive transmission circuit infrastructure with high-reliability performance is provided by the ADSS fiber optic cable system, which includes cables, suspension, dead-end, and termination enclosures.
In most cases, ADSS cable will provide an efficient and optimal solution for aerial cabling or outside plant (OSP) deployments.However, the most remarkable advantages of optical fibre are:
ADSS cable structures are classified into two types of optical fibre:
1. Central Tube Design
The fiber network in this design is placed in a PBT loose tube that is filled with water-blocking material. Then, depending on the desired tensile strength, they are wrapped in aramid yarn and extruded with a PE (110KV electric field strength) or AT (100KV electric field strength) sheath. Of the two fibre cable types, thisstructure has a small diameter and is light in weight, but it has limited lengths.
Central Tube Design
2. Stranded Structure Design
In a stranded structure design, the water-blocking grease and inner optical fibers are added to the loose fiber tube, and different loose tubes are coiled around the central reinforcement (usually FRP). The rest of the fiber optic wire is essentially the same as the central tube structure.
Between both fiber optic cable types, the lattercan produce a longer fibre length. Despite its large diameter and weight, an ADSS fiber optic cable with this structure is better suited for long-distance applications.
Stranded Structure Design
ADSS fiber optic cable or types of OFC cable is a self-supporting fibre network cable that does not require any support when moving power from one location to another. These cables, while self-supporting, are typically installed on utility poles and power lines with the help of a fiber cable connector. Among ADSS fibre optic installation accessories are:
ADSS fibre anchoring clamps can be conveniently utilised during fiber optic cable installation as individual cable dead-end clamps at end poles or as an intermediate (double dead-end) clamp.
ADSS cable was originally derived from military lightweight, rugged deployable (LRD) fiber wires. The advantages of fibre optic cable are many.
ADSS fibre optic cable is now used in aerial installations for short-span, typically on roadside power distribution poles, thanks to continuous improvements in technology such as fiber cable internet. Because it is non-metallic, the ADSS cable is ideal for applications near high-voltage power distribution lines, for which it has become a standard.
Circuits up to 100 km long are possible without repeaters using single-mode fibre and light wavelengths of nm or nm. ADSS OFC cable was typically used in 48 and 96 cores.
A typical ADSS fibre optic network cabling scenario.
ADSS fibre cables provide an optimal solution for a wider range of fiber counts and span lengths, therefore increasing the application of optic fibre in aerial cabling system designers in telecommunications, private network groups, etc.
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