Polyolefin Overhead Line Cover
- CCMT
- CHANGCHUN,CHINA
- Based on the order quantity
- 50,000 meters per month
1. A power conductor sheath protector, also known as an insulation sleeve, is a solid and dependable part, created to provide electrical insulation and safeguarding of electric conductors ranging from low-voltage to high-voltage (generally up to 0.6kV–33kV or 0.6kV–36kV).
2. The conductor cover or overhead line protector is made of a pliable material, mainly high-density polyethylene or low-density polyethylene, and is weather resistant.
3. The overhead conductor cover has an open design for a hassle-free installation, and its main purpose is to cover and seal the cable.
In the power engineering and power grid operation areas, overhead lines get affected by weather elements, and these include UV light, rain, wind, sand and temperature variations. For these reasons, it is likely that the overhead lines shall undergo insulation degradation, cracking, protective failure that result in the increasing of the possibility of breakdown and a further increase in the repairing cost.
Solution:
The high-performance polyolefin materials of our cable protection sleeve, which exhibit outstanding insulation properties, weather resistanc, and wide-temperature adaptability, are the main points that we would like to highlight. It has passed tests for the UV degradation and has at least 10 years and a maximum of 25 years of outdoor service life by doing so. Moreover, it can greatly decrease the line failure rate and maintenance frequency, thereby providing the customers with a reliable protection that lasts for a long time.
Introduction to Overhead Line Covers:
This is a thermal and mechanical protector primarily used for electric and telecom overhead lines. The device is made from flexible materials like HDPE or LDPE, and can be wrapped tightly around uncovered electric and telecom overhead cables or wire. With its vital role in protecting overhead power and telecom lines, this protector's main features are:
· Protecting conductors from environmental factors (such as ultraviolet radiation, rain, dust, and small debris);
· Preventing accidental electric shocks (involving pedestrians, maintenance personnel, or low-hanging objects);
· Reducing mechanical wear caused by minor collisions and swaying of cables due to wind.
Its Specific Performance Is as Follows:
| Property | Testing method | Typinal data |
| Tensile strength | ASTM D 638 | ≥ 8MPa |
| Elongation at break | ASTM D 638 | ≥ 500% |
| Dielectric strength (for 25kV) | ASTM D 149 | 25KV |
| Dielectric strength(for 42kV) | ASTM D 149 | 42KV |
| UV stabilized | ISO4892-3 | PASS |
| Volume resistance | ASTM D 257 | ≥ 1.0×10¹³Ω·cm |
| Water absorption | ISO 62/23℃,14day | ≤0.5% |
| Flammability(Oi) | ISO 4589 | ≥ 27 |
| Low temperature flexibility(-40℃,4hr) | ASTM D 2671 | No crack |
Its Product Specifications Are as Follows:
| Code | Size(MM) | Stuitable conductor section | Max condutor diameter | Standard packing |
| OLIS-13 | 13 | 95mm² | 13mm | 20m/reel;40m/carton |
| OLIS-18 | 18 | 100-160mm² | 18mm | 20m/reel;40m/carton |
| OLIS-23 | 23 | 185-250mm² | 23mm | 20m/reel;40m/carton |
| OLIS-38 | 38 | 300-800mm² | 38mm | 20m/reel;40m/carton |
Advantages of Overhead Conductor Covers:
1. Excellent Electrical Insulation Performance, Providing Reliable Protection for Overhead Lines.
Overhead conductor covers are mainly fabricated with high-performance polyolefins. Such materials exhibit top insulation behavior, so short circuits, flashovers, and unintentional touch will be prevented. It is worthy to mention that dielectric strength is as high as 25/42 kilovolts which, with volume resistivity of at least one times the ten to the power of 13 ohm-centimetres, will guarantee protection for uncovered overhead lines that is practically error-free.
2. Mechanical Properties, Balancing Strength and Flexibility.
Overhead line insulation sleeves are an optimal combo of features providing high strength and excellent flexibility which not only makes the installation process easy but also offers protection against mechanical and environmental forces.
Having tensile strength at least as strong as 8 MPa they also have 500% elongation. This combination ensures that they cling tight onto the conductor protecting it from wind vibration, bending and other factors that can cause cracks on the sleeve or make it fall off.
3. Weather Resistance, Meeting Long-Term Outdoor Operation Requirements.
Made for outdoor use in harsh environment for many years, overhead line insulation sleeves get UV stabilizers and antioxidant protection already during production.
In addition, they comply with the UV resistance requirements of the ISO 4892-3 standard. With a water absorption rate of ≤0.5%, they remain resistant to sun rays, rain and extreme weather and can therefore expect to provide an outdoor service life of 10–25 years.
4. Easy Installation and Low Overall Operating Costs.
Taking into account the light weight of the electrical wire protective sleeve one can easily and quickly install it resulting in saving not only time but also labor costs at the construction site. Our product range contains numerous sizes that are compatible with conductors from 95 to 800 mm², thereby addressing the requirements of various types of circuits.
5. Wide Temperature Adaptability Ensures Long-Term Safe Operation.
Our electrical wire protective sleeves can be used in environments ranging from -40℃ to 80℃, which basically covers all cold and very hot places, fulfilling the need to operate these sleeves for long under a variety of weather conditions. Their very low temperature flexibility has been proved by passing the ASTM D2671 test. Having an oxygen index of ≥27, they are also well capable of withstanding extremely cold weather and have a high degree of fire retardancy that makes them very safe.
Applications of Electrical Wire Protective Sleeves:
1. Perfect for overhead cable insulation protection in rural areas, farmland, and mountainous or isolated locations, a simple yet durable way to prevent wind, rain, and even agricultural machinery from causing the kind of damage they usually could.
2. Preventing the accidental short circuiting resulting from contact with branches or wild animals, and protecting cables from bird or animal impacts in forest, wetlands and other areas with a high degree of bird activity and small animals.
3. Medium-voltage lines which supply power to railway stations and infrastructure. Protective sleeve guarantees good operation even in the most vibrating environment at railway lines thereby maintaining conductor reliability, enhancing insulation and safeguarding trains through the tracks.
About Us:
Established in 1986, CCMT has 40 years of experience in the cable accessories industry, mainly engaged in the R&D, manufacture, and distribution of power and communication cable accessories. Our plant covers an area of 10,000 square meters, has over 200 employees on the production team, and is furnished with well over 40 types of machines for extruding, molding, injection molding, and expansion, capable of producing millions of meters or several tens of thousands of sets of cable accessories a month (note that the amount produced can change depending on the product; for example, it's about 5 million meters of heat shrink tubing/sleeving and 30,000 ends caps). If you want more details, feel free to get in touch with us.
We have a range of heat shrink, cold shrink terminals, connectors, and junction boxes for voltages up to 220kV. Besides our ISO 9001:2015 certificate (No. 00123Q36311R5M/2200) and CE certification we are also a company with type-test reports from third parties and we follow the RoHS and REACH regulations.
Service Guarantee:
We support customization, OEM, full process pre-sales and after-sales service as well as flexible transportation solutions which include sea, land, air, express & DDP (Delivered Duty Paid). Also, we support delivery methods such as FCL, LCL, FOB and CIF to guarantee efficient and timely global delivery.
We will be able to offer customers a greater detail of product descriptions, pictures, videos, and other materials for selections; not only that, but we will also provide customers with a video of the whole production process so that they can see the process themselves. We ship to the customer's chosen ports in China and guarantee excellence in service.
Export and Cooperation:
We have exported our products to dozens of countries around the globe and our equipment are often chosen for the construction of power and communication substations. Among them, we have built a cooperative relationship with leading firms including ABB, CANUSA, RAYCHEM, 3M, and SHELL. We are proud not only of having supplied hundred of thousands of meters of ultra-thick three-layer co-extruded heat-shrinkable composite tubing to RAYCHEM, but also of having fulfilled the order for tens of thousands of rolls of OEM-customized insulating tape for 3M.
Exhibition Activities:
Together with the 2023 Hannover Messe we demonstrated cable accessory solutions in the power, new energy, and rail transportation sectors. We have presented the core advantages of Chinese manufacturing in the insulation protection and the system reliable aspects before approximately 4,000 exhibitors and over 130,000 visitors from around the world. At the same time, we further deepened our cooperation relations with the customers in Europe, the Middle East, and Asia.
FAQ:
1. Can the cable protection sleeve be used outdoors for extended periods?
Product is manufactured using high-performance polyolefins with addition of UV stabilizers and antioxidants. It has passed an intense test according to the ISO 4892-3 UV aging standard and its lifespan in an outdoor environment is between 10 to 25 years.
2. Is the overhead line cover installation complicated?
No. The product is designed with an open configuration, allowing you to keep the conductor intact during installation. Just wrap the sheath around the line and fold it, which saves your time for installation.
3. What protective functions do overhead line insulation sleeves provide?
They provide electrical insulation protection, mechanical protection, and environmental protection simultaneously.
