How to Protect Overhead Power Lines from High-Temperature Damage? Bare Wire Protection Cover Solutions

Overhead lines have been exposed to the outdoor environment for a long time. Compared with underground cables, their operating conditions are more easily affected by factors such as temperature, ultraviolet light, rainwater, sandstorms, salt fog and external foreign matter. Especially in high temperature weather or high line load, the wire temperature will increase further. Without effective external protection, long-term heat exposure may accelerate the aging of insulation materials and increase the pressure on line operation and maintenance.

Therefore, how to increase line protection without replacing the original conductors on a large scale is an issue that often needs to be considered in practical projects. This article will analyze the bare wire protection cover, an overhead line protection scheme, to help buyers understand and select models.

Why Does High Temperature Environment Increase the Protective Pressure on Overhead Lines?

Overhead wires themselves have good outdoor operation capabilities, but when they are exposed to high temperatures for a long time, the comprehensive environmental pressure endured by the lines will increase significantly.

· The increase in ambient temperature will affect the increase in the operating temperature of the wire. When the line is operating under high load, the heat generated by the conductor itself is superimposed on the external high temperature, which may expose the line to a high thermal stress environment for a long time.

· High temperatures are usually accompanied by intense solar radiation and ultraviolet radiation. Long-term ultraviolet radiation may accelerate the aging of some common polymer materials, causing the protective layer to gradually harden, crack or degrade its performance.

· Overhead lines may be affected by tree branches, birds, animals, dust, rainwater, and industrial pollutants. For areas with small line spacing, complex environment, or prone to foreign matter contact, it is difficult to cover all potential risks by relying on the structure of the wires themselves.

Therefore, overhead line protection cannot only focus on the performance of "high temperature resistance", but also needs to consider electrical insulation, weather resistance, ultraviolet resistance, aging resistance, mechanical protection and on-site installation efficiency.

How Does Silicone Cable Protective Cover Provide Protection?

The core role of silicone rubber insulation sheath for overhead lines is to add an additional layer of insulation and protective structure to the exterior of the overhead conductor. From an application perspective, silicone cable protective cover can mainly play the following roles.

1.‍‌‍‍‌ Add extra layer of insulation to overhead lines

silicone cable protective covers will make an insulating protective barrier on the cable surface and provide additional insulation in places where special protection is required, hence, reducing the risks of shorts and flashovers, for example, from contact with external objects. 

Procurement should be tailored to your voltage level, conductor size and line design and it is not at all a matter of replacing the whole insulation system of your transmission line by the silicone cable protective ‍‌‍‍‌covers.

2. Help lines cope with outdoor high temperatures

The sheath does not simply "isolate heat". Its value is more reflected in maintaining the stability of the protective structure under long-term high temperature environments, and in conjunction with the weather resistance of the silicone rubber material itself to provide continuous external protection for the wire.

In areas with high temperatures, strong sunshine, and large seasonal temperature differences, focus should be placed on the high and low temperature adaptability and long-term aging performance of materials, rather than just comparing initial purchase prices.

3. Coping with ultraviolet light, rain and complex weather

Solar ultraviolet rays, rainfall, moisture, sandstorms and pollutants can all have long-term effects on line accessories. The bare wire protection cover has good outdoor weather resistance and can be used as a protective layer between the wire and the external environment. It is especially suitable for power projects in coastal areas, industrial areas, high temperature areas and strong sunshine areas.

4. Reduce the impact of external mechanical factors on the line

In addition to electrical problems, overhead lines may also be affected by tree branch collisions, friction with foreign objects, and mechanical effects during construction and maintenance. The silicone rubber sheath increases the protective structure on the outside of the line, which can reduce the risk of the wire being directly exposed to the external environment to a certain extent.

The Spiral Structure Design Makes the Renovation of Existing Overhead Lines More Flexible.

For power engineering projects, installation efficiency is often as important as product performance. Silicone rubber overhead line sheath products on the market usually use snap, open or spiral structures to facilitate installation on existing wires.

Take CCMT's bare wire protection cover as an example. With‍‌‍‍‌ its advanced silicone rubber spiral structure, this product enables wrapping and installation around overhead cables already in place, without the need to dismantle the line. In this way, it is the renovation and maintenance of projects that will be more easily accommodated with flexible construction ‍‌‍‍‌methods.

For power companies and engineering contractors, this design makes it easier to target:

· Exposed areas of overhead lines;

· Wire intersection location;

· Jumper and connection areas;

· Lines that are susceptible to external environmental impacts;

· Areas with frequent activities such as birds and branches;

Provide local protection. This is also a factor that deserves special attention when purchasing: it must not only protect the line, but also facilitate on-site construction.

What Should I Pay Attention to When Purchasing a Bare Wire Protection Cover?

For bulk buyers, when selecting products, they cannot judge whether a product is suitable for the project based on single keywords such as "silicone rubber" and "high temperature resistance". Priority should be given to:

·Whether the wire specifications match

·Whether the voltage level meets the project requirements

·Whether it is suitable for long-term outdoor use

·Whether the installation method meets the on-site construction conditions

·Whether project customization is supported

The Best Choice for Silicone Cable Protective Cover-CCMT:

As a manufacturer with more than 40 years of experience in the field of cable accessories, we have been focusing on the research and development, manufacturing and supply of cable accessories for power and communication systems. Our products cover heat shrinkage, cold shrinkage, cable joints, cable terminals, sealing materials and overhead line protection products. Our product system can cover related applications of 220kV and below.

At present, CCMT has a modern production base of more than 10,000 square meters and more than 40 professional production equipment, forming a manufacturing system covering extrusion, molding, injection molding and expansion processes, which can meet the bulk procurement and customization needs of overseas customers.

In terms of quality management, the company implements the ISO 9001:2015 quality management system and provides corresponding certification, testing and third-party test data based on different product and project needs. CCMT also supports OEM/ODM, LOGO customization, sample and project-based product development, and can provide product selection and technical support based on customers 'actual line conditions.

This complete ability from material and structural design to manufacturing and quality control allows us to not only provide a single silicone cable protective cover, but also provide a more complete cable accessory solution around power line insulation, protection and sealing needs.

Conclusion: In High Temperature Environments, Overhead Line Protection Requires More Systematic Solutions.

When providing additional protection for existing overhead lines, selecting a suitable silicone cable protective cover can increase line protection capabilities from many aspects such as electrical insulation, outdoor weather resistance and mechanical protection.

For high temperatures, strong sunshine, complex outdoor environments and line renovation projects, procurement should focus on material performance, applicable voltage, wire specifications, weather resistance, installation methods and supplier manufacturing capabilities, rather than just comparing product unit prices. If you need to purchase cable accessories-related products, you are welcome to provide information on actual wire specifications, voltage levels and application environment, and we will match the right solution for you.