Aerial Cables Explained: Installation Techniques and Use Cases

Overhead cables, installation technology, application scenarios

1. What is an overhead cable?




2. The advantages of overhead cables




3. Installation technology of overhead cable

   
   

   
   

   1. Preparation before installation

      
      

   2. Installation steps

      
      

   3. Installation precautions

   
   

   
   




4. Application scenarios of overhead cables

   
   

   
   

   1. Power transmission

      
      

   2. Communications

      
      

   3. Industrial scenarios

   
   

   
   




5. related questions and answers

What is an overhead cable?

Overhead cable is a kind of cable that is erected on a support structure such as a utility pole, mainly used in the fields of power transmission and communication. Unlike underground cables, it does not require large-scale underground excavation work, and has the characteristics of fast construction and relatively convenient maintenance.

Advantages of overhead cables

First, from the perspective of construction cost, compared with underground cables, overhead cables do not require expensive underground laying projects, including excavation and pipeline laying, which greatly reduces the construction cost. Secondly, in terms of maintenance, since overhead cables are exposed to the external environment, once a fault occurs, maintenance personnel can more intuitively find the problem and repair it, and the maintenance efficiency is high. In addition, the installation of overhead cables is relatively flexible, and it is more adaptable in some areas with complex terrain, such as mountainous areas and near rivers.

Overhead cable installation technology

Preparation before installation

Before installing overhead cables, detailed planning and measurement are required. First, the direction and path of the cable must be determined, taking into account factors such as terrain and buildings to ensure the safety and stability of the cable. At the same time, the required materials and equipment, including cables, poles, insulators, hardware, etc., must be prepared. These materials and equipment must be strictly quality checked to ensure that they meet relevant standards and requirements.

Installation steps

The first step is to erect the poles, erect the poles according to the planned position and spacing, and ensure that they are vertical and firm. The second step is to install insulators, which are fixed on the poles to support and insulate the cables. The third step is to erect the cables, and use the traction equipment to pull the cables from one end to the other. During the process, pay attention to the tension control of the cables to avoid damage to the cables. The last step is to fix and connect the cables, use hardware to fix the cables on the insulators, and reliably connect the cable sections.

Installation precautions

During the installation process, pay attention to the weather conditions and avoid installation in bad weather such as strong winds and heavy rains to avoid safety accidents. At the same time, construction should be carried out in strict accordance with the operating procedures to ensure the safety of construction workers. The tension control of the cable should be precise. Too loose may cause the cable to sag and affect its normal operation; too tight may cause stress inside the cable and shorten its service life.

Application scenarios of overhead cables

Power transmission

In urban and rural power supply, overhead cables are a common way of power transmission. Especially in some remote areas or areas with relatively small power demand, overhead cables can quickly and economically realize power transmission to meet the power needs of local residents and enterprises.

Communications field

In the communications field, overhead cables are used to transmit signals such as telephone and Internet. It can provide communications solutions for some areas where it is difficult to lay underground communications cables, such as mountainous areas and rural areas. Through overhead cables, these areas can achieve communication connections with the outside world and promote the circulation and exchange of information.

Industrial scenarios

In some industrial plants, overhead cables can be used to connect various production workshops and equipment to achieve power and signal transmission. For example, in large factories, electricity needs to be transmitted from substations to various production lines. Overhead cables can meet this long-distance, large-capacity power transmission demand.

Related questions and answers

What is the service life of overhead cables?

The service life of overhead cables is usually around 20-30 years, but this is also affected by environmental factors, maintenance conditions, etc. If the environment is harsh or maintenance is improper, its service life may be shortened.

Which is safer, overhead cables or underground cables?

Both have their own characteristics. Overhead cables are exposed to the outside and may be affected by natural disasters such as lightning strikes and strong winds, but faults are easier to find and repair; underground cables are relatively hidden and less affected by the external environment, but once a fault occurs, it is more difficult to repair.

Does the installation of overhead cables require professionals?

Yes, the installation of overhead cables involves professional knowledge and skills such as electrical and aerial work, and needs to be operated by professionals with relevant qualifications and experience to ensure the quality and safety of the installation.

How to maintain overhead cables in bad weather?

After bad weather, check the overhead cables in time to see if there is any damage or looseness. Damaged cables should be repaired or replaced in time to ensure their normal operation.

Can overhead cables be used for high-voltage power transmission?

Yes, overhead cables can be used for power transmission at different voltage levels, including high-voltage power transmission. However, in high-voltage applications, higher requirements are placed on the insulation performance and mechanical strength of the cables.