OPGW optical cable, full name Optical Fiber Composite Overhead Ground Wire, that is, optical fiber composite overhead ground wire, also known as composite optical cable ground wire. The following is a detailed introduction to it:

1. structure characteristics

OPGW cable is mainly composed of optical fiber unit and metal cable. The optical fiber unit is used to transmit optical signals to realize high-speed and large-capacity data transmission; the metal cable is used to transmit power or as a ground wire, usually composed of stainless steel pipe, steel core aluminum stranded wire, aluminum clad steel stranded wire, aluminum stranded wire, aluminum alloy stranded wire, steel stranded wire, etc. This composite structure makes the OPGW fiber optic cable not only have the high-speed and large-capacity characteristics of optical fiber communication, but also retain the electrical and mechanical properties of the traditional overhead ground wire.

2. technical parameters

The technical parameters of OPGW cable include but are not limited to the following aspects:

Fiber core number: usually 24 core, 48 core, 72 core, 96 core, etc., the specific number of cores can be customized according to user needs.
Optical fiber type: G.652D, G.653, G.655 and other types of optical fiber are often used to meet different transmission requirements.
Fiber diameter: generally 3.00mm, but can also be adjusted according to the specific design.
Cross-sectional area of optical cable: common specifications such as 6/3.2/20AS or 48B1/120AS.
Rated breaking force: usually 51kN or higher to ensure the stable operation of the optical cable in harsh environments.
Short-circuit current capacity: generally 9kA 2s, used to evaluate the carrying capacity of the optical cable under short-circuit conditions.
Distance: usually 300m or according to the specific line design.
Installation method: single-phase, three-phase, two-phase and other installation methods can be used to adapt to different line requirements.

3. performance characteristics

OPGW optical cable has a variety of excellent performance characteristics, including:

High strength and high tensile performance: can withstand large tension and tension, to ensure stable operation in harsh environments.
Good corrosion resistance: The outer layer of the optical cable is usually made of corrosion-resistant materials, which can maintain long-term stable performance in various environments.
Dual functions: In the same cable, the dual functions of power transmission and communication transmission are realized at the same time, effectively reducing the number of optical cables and installation costs.
Low transmission loss: optical fiber transmission loss is low, which can ensure the stability and reliability of communication signals in the long-distance transmission process.
Anti-electromagnetic interference: Because the optical cable uses optical fiber transmission, it is not affected by electromagnetic interference, ensuring the purity and safety of communication signals.

4. Application Areas

OPGW cables are widely used in many fields, including:

Power system: used to monitor the working status of the line in real time and improve the reliability and safety of the power grid. At the same time, it can also be used as the ground wire of the power system to provide additional electrical protection.
Communication system: OPGW optical cable is widely used in optical cable networks between communication base stations or between cities to meet the needs of high-speed data transmission.
Railway system: used for communication and signal transmission in the railway system to ensure the normal operation and safety of the railway system.
Oil and gas industry: The application of OPGW optical cable in pipeline monitoring system can monitor pipeline temperature, pressure and flow parameters in real time to improve the safety and reliability of pipeline operation.

5. Maintenance and Maintenance

In order to ensure the normal operation and prolong the service life of OPGW cable, it is necessary to carry out regular maintenance and maintenance. Specifically include:

Regular inspection: regularly check the appearance and fixation of the optical cable to ensure that the surface of the optical cable is free of damage, fracture, deformation, etc., and is firmly fixed.
Test the connection quality: Use professional testing equipment to test the connection point of the optical cable to ensure that the connection point has good contact and qualified resistance.
Protective measures: add anti-corrosion coating for the optical cable and use anti-ultraviolet cable sheath and other protective measures to prevent corrosion and aging of the optical cable.
Timely repair: Once the fiber optic cable is found to be damaged or there is a problem with the connection point, it should be repaired or replaced immediately to ensure the communication performance of the fiber optic cable.
In summary, OPGW optical cable is a combination of power transmission and communication transmission function of optical cable, with high strength, high tensile performance, good corrosion resistance, low transmission loss and anti-electromagnetic interference. It plays an important role in the fields of power system, communication system, railway system and oil and gas industry.