Tree Retardant Cross-Linked Polyethylene (TR-XLPE) is a widely used insulation material in medium and high voltage power transmission projects. Especially in wet and underground laying conditions. The material has excellent insulating and water tree resistance properties. Learn more about TR-XLPE below:
- What is tr-xlpe cable? its material composition
- What are the differences between TR-XLPE and XLPE materials?
- What are the benefits of TR-XLPE?
What is tr-xlpe cable?
TR-XLPE cables stand for tree retardant cross-linked polyethylene cables. It is a thermosetting plastic compound used for cable insulation. The unique composition of TR-XLPE cables includes cross-linked polyethylene and flame retardant additives for trees. TR-XLPE cables are commonly used in urban power grids and industrial facilities. They play a vital role especially in medium and high voltage cable systems.
Materials Used in TR-XLPE Cable
Cross-Linked Polyethylene
Cross-Linked Polyethylene forms the core of TR-XLPE cable insulation. The material offers excellent thermal and electrical properties. Cross-linking enhances the polyethylene’s resistance to heat and stress. The process creates a three-dimensional molecular structure. The structure provides superior mechanical strength. Cross-Linked Polyethylene ensures that TR-XLPE cables perform reliably under high voltage conditions.
Tree Retardant Additives
The term “tree-retardant” refers to dendritic microscopic cracks inside the cable insulation due to water penetration, which can gradually reduce the insulation performance of the cable and even lead to cable failure. Tree Retardant Additives are essential in TR-XLPE cable composition. The additives prevent the formation of water trees, which can degrade the insulation over time. It is particularly important for cables laid underground or operating in humid environments, as it significantly improves the reliability and long-term stability of the cable. Manufacturers incorporate proprietary compounds into the insulation, which typically make up about 2% of the insulation. The additives ensure that TR-XLPE jacket cables maintain performance standards.
Difference between xlpe and tr-xlpe
TR-XLPE vs. XLPE
Differences in Composition
TR-XLPE cables contain tree retardant additives. The additives enhance resistance to electrical treeing. XLPE cables lack the specific additives. The absence of tree retardant compounds in XLPE affects longevity. TR-XLPE insulation includes proprietary compounds. Manufacturers add about 2% of these compounds to the insulation. XLPE insulation does not have these enhancements.
Performance Comparison
TR-XLPE cables offer superior performance in harsh environments. The cables resist water treeing effectively. XLPE cables exhibit less resistance to water treeing. TR-XLPE cables maintain high insulation resistance. XLPE cables show lower insulation resistance under stress. TR-XLPE cables support long-term operation at temperatures up to 90 °C. XLPE cables may not perform as well under similar conditions. TR-XLPE cables provide a longer service life. It is widely acknowledged that XLPE cables lacking a radial water barrier typically have a service life of around 25 years. In contrast, cables equipped with water-tree flame-retardant insulation can exceed a service life of 40 years.
Click for more information about XLPE cables: XLPE Cable:Frequently Asked Questions(FAQs)
Advantages of Using TR-XLPE Cable
Enhanced Durability of TR-XLPE Cable
- Resistance to Electrical Treeing
TR-XLPE cables exhibit remarkable resistance to electrical treeing. The unique combination of materials within the insulation prevents the formation of tiny, tree-like structures that can cause failures. This resistance makes sure the cables are dependable for the duration of their life. Engineers rely on this property to maintain the integrity of electrical systems.
- Resistance to various environments
TR-XLPE cables can withstand a wide range of environmental conditions, including humidity, chemicals and temperature fluctuations. For example, in coastal areas where cables may be exposed to saline environments, TR-XLPE provides excellent protection against corrosion. TR-XLPE cables are the smart choice for utility companies and a wide range of industries.
Enhanced Electrical Performance of TR-XLPE Cable
- High Insulation Resistance
The insulation in TR XLPE cables provides high resistance against electrical currents. This feature prevents current leakage and ensures safety. The high insulation resistance also contributes to the overall efficiency of power transmission.
- Low Dielectric Loss
TR cables exhibit low dielectric loss, which means minimal energy is lost during transmission. The characteristic enhances the efficiency of power delivery across distances. For example, in renewable energy installations such as solar farms, TR-XLPE cables transmit power efficiently, reducing leakage and ensuring optimal utilization of energy.
Conclusion
TR-XLPE cable insulation offers significant advantages. TR-XLPE cables are available in a wide range of applications suitable for specialized applications. If you’re in the market for high-quality medium voltage TR-XLPE cables that tick all the right boxes for safety and efficiency, or if you need submarine TR-XLPE cables that can handle being underwater without a hitch, ZW Cable has just what you need. Whether you’re dealing with rigorous standards or tricky environments, we’ve got your back with a solid product lineup.
