Polyolefin Material Overhead Line Cover
- CCMT
- CHANGCHUN,CHINA
- Based on the order quantity
- 50,000 meters per month
1. Overhead line covers for conductors takes into account the strength and flexibility of the material, tensile strength ≥ 8 MPa, elongation at break ≥ 500 %.
2. Overhead line insulation sleeve cover has passed the UV aging test, with water resistance, low temperature resistance and other properties, suitable for outdoor protection requirements.
3. We provide models that are suitable for different wire cross-sectional areas and diameters to facilitate the selection of power projects according to the actual line size.
How to Avoid the Mismatch Between the Overhead Line Sheath and the Wire Specification, Resulting in a Decrease in the Protection Effect ?
In the overhead line reconstruction and maintenance project, there may be differences in the cross-sectional area, outer diameter and line structure of the wire. If the inner diameter of the sheath does not match the size of the wire, there may be problems such as poor installation, insufficient local coverage or late position deviation, which will increase the cost of on-site adjustment and maintenance. Therefore, when purchasing, we should not only pay attention to the sheath material, but also need to check the model and the actual wire size.
CCMT 's overhead line covers for bare conductors offer a wide range of specifications, adapted to different conductor sizes, and an open structure for easy cladding installation. The elongation at break of the product is ≥ 500 %, taking into account the ductility and mechanical strength of the material, which is helpful to adapt to the slight bending and swing in the operation of the line. Before purchasing, the model can be confirmed according to the maximum outer diameter, cross-sectional area and actual installation conditions of the wire, so as to reduce the construction problems caused by the mismatch of specifications.
Parameter Guide :
| Parameter/Item | Technical Specifications |
| Product Name | Overhead Line Insulation Sleeve |
| Main Material | High-density polyethylene (HDPE) or low-density polyethylene (LDPE) material system (refer to the specific model for details) |
| Tensile Strength | ≥ 8 MPa |
| Elongation at Break | ≥ 500% |
| Dielectric Strength (25 kV Model) | 25 kV |
| Dielectric Strength (42 kV Model) | 42 kV |
| Volume Resistivity | ≥ 1.0 × 1013 Ω·cm |
| Water Absorption | ≤ 0.5% |
| UV Aging Test | Passed (ISO 4892-3) |
| Low-Temperature Flexibility | No cracking after 4-hour test at -40 ℃ |
| Oxygen Index | ≥ 27 |
| Supply Capacity | 50,000 meters/month |
Specifications Model :
| Model | Dimensions (mm) | Applicable Conductor Cross-Sectional Area | Maximum Conductor Diameter |
| OLIS-13 | 13 | 95 mm2 | 13 mm |
| OLIS-18 | 18 | 100-160 mm2 | 18 mm |
| OLIS-23 | 23 | 185-250 mm2 | 23 mm |
| OLIS-38 | 38 | 300-800 mm2 | 38 mm |
Selection tips : the test conditions and the applicable scope of the model corresponding to the dielectric strength should be based on the formal technical specification and the test report. Specific material systems of different models are also recommended to be confirmed at the time of inquiry.
Product Features :
· The mechanical properties and flexibility are taken into account to adapt to the running state of the wire.
Overhead conductors will be affected by wind, temperature changes and slight vibration during long-term operation. The sheath needs to have a certain extension ability to avoid the risk of cracking caused by over-hardening materials.
Our Overhead line insulation sleeve has a tensile strength of ≥ 8 MPa and an elongation at break of ≥ 500 %. It provides mechanical protection while taking into account flexibility and is suitable for overhead line protection projects with clear requirements for material ductility.
· Focus on long-term protection capabilities for outdoor conditions.
Outdoor lines are long-term exposed to ultraviolet light, rainfall and temperature changes, and material aging may affect the protective effect of the sheath.
The overhead line cover insulation Sleeve passed the ISO 4892-3 UV aging test, with water absorption ≤ 0.5 %, and no cracking after 4 hours of low temperature flexibility test at -40℃. The purchaser can evaluate whether the product is suitable for the actual use environment in combination with the local climate, line operating conditions and project maintenance cycle.
Application Areas :
The overhead line cover insulation sleeve of CCMT can be used for distribution line upgrading, local insulation protection of power supply lines in industrial parks and overhead conductors around substations.
In the area where the equipment is dense, the line is close to the surrounding metal structure, or the external contact risk needs to be reduced, the appropriate model can be selected according to the wire size and electrical requirements to add an auxiliary protective layer to the existing line. The specific application should be confirmed according to the line voltage level, insulation coordination requirements and on-site installation conditions.
Why Choose CCMT ?
Changchun Chemistry Technology Co., Ltd. was founded in 1986, with 40 years of experience in cable accessories industry, covering the R & D, production and sales of power and communication cable accessories. Our factory covers an area of more than 10,000 square meters, with more than 200 employees and more than 40 production equipment, with a variety of cable accessories processing and manufacturing capabilities.
Production and quality management.
Our equipment covers extrusion, molding, injection molding, expansion and other process equipment, which can be arranged for production according to product type and order demand. At the same time, it has ISO9001 : 2015 quality management system certification, CE related certification, and some cable accessories type test reports issued by third-party testing institutions.
Cooperation and export services.
CCMT has established cooperative relations with ABB, CANUSA, RAYCHEM, 3M, SHELL and other enterprises, and its products are exported to dozens of countries and regions around the world. Relevant cooperation experience involves a variety of cable accessories and OEM products.
For bulk procurement, we can provide product information, pictures, video and model selection support, and customize and OEM services according to customer demand communication specifications. The mode of transportation can be negotiated by sea, land, air, express and DDP. The after-sales stage can provide product use-related consulting and production process information to assist customers in understanding product manufacturing.
Exhibition style and industry communication.
In April 2024, our company appeared at the Middle East International Power Energy Exhibition to show global buyers the products and manufacturing strength in the field of cable accessories. During the exhibition, we focused on cable accessories products covering medium and low voltage to high voltage application scenarios, up to 220 kV voltage level, and communicated with customers from the United Arab Emirates, Saudi Arabia, Turkey, Iran and other countries and regions on product parameters, project applications and customized needs.
FAQ :
1. How should I choose the appropriate sheath model ?
It is recommended to confirm the maximum outer diameter, cross-sectional area and line voltage requirements of the wire first, and then check the scope of application in the product specification table. You can contact us to help you determine the specifications.
2. Is the overhead line insulation sleeve cover suitable for long-term outdoor use ?
The product has passed the ISO 4892-3 UV aging test, and has low temperature flexibility and water resistance. The actual service life still depends on the material model, local climate, installation quality and line operating conditions. It is recommended to evaluate the project environment.
