The Excellent ADSS Cable Manufacturer In China Provides You The Important Information
Melontel
Your Professional ADSS Cable Manufacturer
ADSS Cable Data Sheet
ADSS cable (All Dielectric Self Supporting) is widely used in the market. It is not only widely used in the industrial field, but also an indispensable product in the process of enterprise digital construction. Compared with global manufacturers, MELONTEL is committed to providing you with high-quality OEM services while providing high-quality products, which will ensure that you get more considerable benefits in the process of serving customers.
What is a ADSS fiber cable?
All-dielectric self-supporting optical cable (ADSS) is a composite optical cable in which the optical fiber bundle is wound around the central strength member. This determines that it has the characteristics of no metal, tension resistance, self-supporting, high insulation, no inductance, thin diameter, light weight, easy construction and economy.
Features: All dielectric, no metal, non-conductive; small cable diameter, large tensile force ratio; low linear expansion coefficient, wide applicable temperature.
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Typical structure and performance of ADSS optical cable
The full name of ADSS optical cable is ALL Dielectric Self-Supporting optical fiber cable, which mainly uses aramid yarn as the reinforcing element.
The chemical composition of aramid yarn is polyaramid (international trade name Kevlar, B fiber, Chinese trade name aramid), with high tensile strength, high Young’s modulus (up to 120GPa), high temperature resistance, and creep Smaller, anti-aging, good insulation.
ADSS can be erected on the original towers of power lines without power outage construction, with electrical traces, wide temperature range, and simple erection method. It has been widely used in power and railway communication systems. ADSS light in large-span places such as terrain has its unique advantages, and has become the preferred overhead light for power system networking.
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What are the advantages of the ADSS cable?
ADSS optical cable is an all-dielectric metal-free self-supporting optical cable erected on transmission lines according to specific conditions. Its structure does not contain any electrical conductor material. The materials such as aramid fiber used can withstand large tension and have a small thermal expansion coefficient. Less affected by temperature changes.
Due to the reasonable design of the optical cable and the precise control of the excess length and the cabling method, it has excellent mechanical performance and environmental performance; light weight and small outer diameter can reduce the load of the tower and pole; easy installation and construction, can Effectively utilize the original tower resources and save costs.
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Features of ADSS cable
Specifically, in addition to the advantages of ordinary light (large communication capacity, long medium-dimensional distance, anti-lightning and electromagnetic interference, and good confidentiality), ADSS also has the following notable features:
1) Specially designed for power system, it is a white-contained overhead light environment with full insulating medium, and its structure does not contain any metal materials.
2) The fully insulated structure and high withstand voltage index make it conducive to the installation of overhead power lines in live operation, without affecting the normal operation of the transmission line.
3) It has the convenience of maintenance, is independent from the power line, and does not affect the normal maintenance of the transmission line and optical cable.
4) The aramid material with high tensile strength is used, which can not only withstand strong tension, meet the long-span requirements of overhead power lines, but also prevent bird pecking and artificial shooting.
5) The thermal expansion coefficient of ADSS optical cable is small. When the temperature changes greatly, the radian change of the optical cable line is small, and its weight is light, and its icing and wind load are also small.
6) Good economy, can be erected on the same tower (pole) with transmission lines of various voltage levels, no need for new pole towers and new land occupation, fast construction speed, short construction period, saving construction costs.
7) It has the advantages of strong impact resistance.
8) It has strong anti-electromagnetic interference, lightning strike, bullets, ultraviolet light, strong wind and vibration ability.
9) The project cost is relatively low. The comprehensive cost of ADSS optical cable project is about 1/6~1/12 of pipeline and direct buried optical cable, and 60%~80% of overhead OPGW and GWWP.
The above advantages determine that ADSS optical cable is particularly suitable for optical fiber communication in power systems, along electrified railways and other areas with available high-voltage transmission towers.
If there are abundant resources of high-voltage transmission poles and towers, the unique advantages of ADSS optical cables will be fully exerted, and there will be huge market prospects.
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The structure of ADSS fiber optic cable
The basic structure of ADSS optical cable is that the core is covered with an inner cushion, and then the aramid yarn is evenly wound, and then covered with a black polyolefin sheath. The basic components of ADSS cable include:
Outer sheath
The outer sheath of ADSS optical cable currently has two grades in terms of resistance to electrical corrosion. One is suitable for long-term operation within the induction field strength below 12kV/m, and the outer sheath of the optical cable is made of ordinary polyethylene material (often called PE sheath).
The other is to adapt to long-term operation within the induction field strength below 25kV/m. The outer sheath of the optical cable is made of cross-linked polyolefin material with electrical tracking (often called AT sheath). The longitudinal resistance of the outer sheath is generally 1014Ω/m in a dry state, and 107Ω/m~109Ω/m in a wet state.
Aramid yarn
Aramid yarn is the main load-bearing unit of ADSS optical cable, and has bulletproof ability.
Aramid yarn itself has a negative temperature thermal expansion coefficient. The aramid yarn is wrapped between the outer surface of the inner sheath and the inner surface of the outer sheath, and is tightly bonded with the inner surface of the outer sheath. Each layer of aramid yarn is covered with a certain pitch to ensure torque balance and effective transmission of tension when under tension.
In addition, the selection of its model and quantity is directly related to the carrying capacity of the optical cable under overhead conditions.
Loose tube
The loose tube of ADSS cable is made of PC material. The optical fibers are distributed in the tube in a wave-like or helical manner. To prevent water and moisture from eroding the fiber, the inside of the bundle is filled with a non-dribbling colloidal compound.
There are currently four types of structures for metal-free self-supporting cables:
A. Central tube type ADSS optical cable:
B. Layer twisted ADSS optical cable:
C. Distributed enhanced ADSS optical cable:
D. Ribbon ADSS light.
It is widely used in power overhead lines for layered ADSS optical cables and central bundled ADSS optical cables. The layered type is to wrap the loose fiber tube around the central strength member, while the central tube type is to place the fiber loose tube in the center. at the cable center. The advantage of the layered structure is that the number of cores is large, the excess length is easy to control, and it is convenient to use in large span occasions.
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What is the use of ADSS cable?
All-dielectric self-supporting optical cable (ADSS optical cable) is mainly used in power systems, and its cost is slightly higher than that of ordinary Fiber-optic cables, but it has the advantages of long life, low loss, and good safety performance, which can reduce the construction cost of power communication systems. The quality of power communication can be improved.
ADSS vs UGFO
What is OPGW cable？
OPGW cable, Optical Fiber Composite Overhead Ground Wire (also known as fiber composite overhead ground wire).
This is a design with dual functions of ground wire and communication. By placing the optical fiber in the ground wire of the overhead high-voltage transmission line, it is used to form the optical fiber communication network on the transmission line, which is generally called OPGW optical cable.
Features: ADSS V.S OPGW
All-Dielectric Self-Supporting Optical Cable (ADSS):
All optical cables are made of non-metallic materials, and no power failure is required during installation, and the communication system is relatively independent from the transmission line, which can provide a relatively large number of optical fiber cores. Maintenance is more convenient, suitable for erection on the original transmission line.
Optical fiber composite overhead ground wire (OPGW):
This fiber optic cable structure is mainly divided into two parts, the fiber optic unit and the armored outer layer.
The fiber optic unit is compounded inside the overhead ground wire. Optical fiber composite overhead ground wire has the highest reliability, but it is more expensive than other types, and is suitable for new transmission lines or old transmission lines that need to be replaced.
| Item/Parameter | ADSS | OPGW |
|---|---|---|
| Voltage level | 110kV and below | Various voltage levels |
| Installation location | Below wire or between wire and ground | Ground position |
| live construction | Live construction can be done at a safe distance | cannot |
| Tower strength | need to calculate | need to calculate |
| Resistance to external damage | Aramid structure, anti-bird peck, shot | the strongest |
| Whether to consider galvanic corrosion | to be considered | Not consider |
| The maximum temperature that can withstand during short circuit | Not consider | 200℃~300℃ |
| Service life (Years) | 20~25 | 30~40 |
| Whether to consider span | consider | consider |
| Number of fiber cores | can be more | can be more |
| Optical cable splice box installation position | Tension tower | Tension tower |
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International Standard
Internationally, ADSS optical cables are mainly based on IEC standards, and their technical standards are IEC 60794-4-20:2018. Optical fiber cables-Part 4-20: Sectional specification Aerial optical cables along electrical power lines Family specification for ADSS (all dielectric self-supported) optical cables”.
The test is based on the standard IEC60794-1-2 “Optical fiber cables-Part 1-2: Generic specification-Basic optical cable test procedures General guidance”. The items to be tested are indexed in this standard.
For the test methods and index requirements of specific mechanical properties, see IEC60794-1-21 “Optical fiber cables-Part 1-21: Generic specification-Basic optical cable test procedures Mechanical test methods”.
See IEC 60794-1-22 “Optical fiber cables-Part 1-22: General specification-Basic optical cable test procedures-Environmental test methods” for specific environmental performance test methods and index requirements.
Status of ADSS optical cable in China
ADSS optical cable has developed a complete standard system in China, including national standards, industry standards, and enterprise standards formulated by the main users of optical cables such as the State Grid.
In terms of technical indicators, ADSS optical cables are mainly based on the following standards:
1) National standard GB/T 18899-2002 “All-dielectric self-supporting optical cable”;
2) Electric power industry standard DL/T 788-2016 “All-dielectric self-supporting optical cable”.
In terms of test basis, the main basis for the mechanical and environmental performance of ADSS optical cables is GB/T7424.2-2008 “General Specification for Optical Cables Part 2: Basic Test Methods for Optical Cables”. The standard is modified and adopted by IEC 60794-1-2, that is, the test methods and main test items are in line with international standards.
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Market demand
Due to the need to upgrade power communication systems, the demand for ADSS fiber optic cables is constantly increasing.
We have learned that the export scale of ADSS optical cable products is increasing year by year, and the exporting countries are all over Southeast Asia, South Asia, East Asia, West Asia, Europe, Africa and the Americas, especially Thailand and Indonesia in Southeast Asia occupy a high proportion of exporting countries.
Test results of main mechanical and environmental performance indicators of ADSS optical cable
| Test items | Test Basis Standards, Test Methods and Judgment Basis | Test Results |
|---|---|---|
| Stretch | IEC 60794-1-2, the tensile force is not less than 2850N, and the tensile load is maintained for 1h; After loading MAT, the attenuation value of the optical fiber with a wavelength of 1550nm will not change significantly. After the tension is removed, the fiber should have no significant residual additional attenuation and strain: there should be no visible cracks in the jacket. |
After the test, the maximum residual additional attenuation of the fiber is 0.022dB.
The maximum residual strain of the fiber is 0.004dB. |
| Squish | IEC60794-1-2, the short-term flattening force is 2200N, and the long-term flattening force is 1100N. The short-term flattening duration is 1min, and the long-term flattening duration is 10min. The additional attenuation of the single-mode fiber at the wavelength of 1550mm under the crushing force should not be greater than 0.05dB. After this squashing force is removed, the fiber should have no significant residual additional attenuation. |
After the long-term flattening pressure is removed, the maximum additional attenuation of the fiber is less than or equal to 0.009dB. After the long-term flattening pressure is removed, the maximum additional attenuation of the fiber is less than or equal to 0.011dB. After the test, there was no visible cracking of the sheath. |
| Impact | IEC60794-1-2, the impact energy is 10J, the number of impact is at least 5 points, each point is 3 times, and the distance between every two points is not less than 500mm. After the test, the single-mode fiber should have no obvious residual additional attenuation, and the sheath should have no Visible cracks. |
After the test, the additional attenuation value of the fiber is 0.07dB. There is no visible crack in the sheath. |
| Repeated bending | IEC60794-1-2, the bending frequency is 30 times/min, the duration is 100s, the bending angle is ±90°. After the test, the optical fiber should have no obvious residual additional attenuation, and the sheath should have no visible cracking. |
After the test, the additional attenuation value of the fiber is 0.006dB. There is no visible crack in the sheath. |
| Twist | The torsion length of IEC60794-1-2 is 1m, and the number of torsions is 30 times per minute, for a total of 10 minutes. When the optical cable is twisted to the limit position, the optical fiber should have no obvious additional attenuation, and there should be no obvious residual additional attenuation when the optical cable returns to the starting position. The sheath should have no visible cracking. |
After the test, the additional attenuation of the fiber is 0.020dB. There is no visible crack in the sheath. |
| Water seepage test | IEC60795-1-2, the test temperature is (20±5)℃, the air pressure is (86~100)kPa. The test time is 24h. After the test, if there is no water seepage, it will be judged as qualified. |
After the test, no water seeps out. |
Test results of main mechanical and environmental performance indicators of ADSS optical cable
| Model | F7 | F16 | F21 | F26 | F31 | F38 |
|---|---|---|---|---|---|---|
| Reference span (m) | 100~300 | 300~500 | 500~650 | 650~800 | 800~900 | 900~1000 |
| Outer diameter (mm) | 14.0 | 15.0 | 15.5 | 16 | 16.5 | 17.2 |
| Nominal mass (kg/km) | 165 | 185 | 200 | 210 | 255 | 235 |
| Ultimate tensile strength (N) | 20500 | 46500 | 61500 | 75500 | 92000 | 113000 |
| Maximum running tension (N) | 6800 | 15500 | 20500 | 25100 | 30500 | 37600 |
| Minimum static bending radius (mm) | 10D | |||||
| Minimum dynamic bending radius (mm) | 30D | |||||
| Maximum field voltage (kV) | 25 | |||||
|
Standard initial sag (%) |
1~3 | |||||
| Operating, storage, transportation temperature (℃) | -40~+70 | |||||
