High temperature and low temperature tolerance design of AISG cables

1, High temperature tolerance design
In high-temperature environments, AISG cables face various challenges, including material aging, decreased insulation performance, weakened mechanical strength, and thermal expansion. To address these challenges, the high temperature tolerance design of AISG cables should follow the following principles:
Choosing the appropriate insulation material: Insulation material is the key to the high temperature tolerance of cables. Insulation materials that can withstand high temperatures, such as cross-linked polyethylene (XLPE), polytetrafluoroethylene (PTFE), or silicone rubber, should be selected. These materials have high heat resistance and good electrical insulation performance, and can maintain stable electrical performance in high temperature environments.
Enhance the mechanical protection of cables: In high-temperature environments, the outer protective layer of cables requires additional protection to prevent mechanical damage. Metal armor layers, such as steel strip armor or steel wire armor, can be considered to provide additional mechanical strength and thermal stability.
Consider thermal expansion and contraction: Cables will undergo thermal expansion at high temperatures, and this should be taken into consideration during design. Flexible fixing or serpentine laying methods should be used to allow for some movement space for cables during temperature changes, reducing damage to cables caused by thermal stress.
Optimizing the heat dissipation design of cables: By increasing the spacing between cables, using heat dissipation materials, or designing suitable cable laying paths to improve heat dissipation efficiency, it can help reduce the operating temperature of cables and extend their service life.
Choose appropriate protective layer material: The outer protective layer material of the cable should have good heat resistance, chemical corrosion resistance, and environmental impact resistance. For example, heat-resistant materials such as polyvinyl chloride (PVC) or rubber can be used to protect cables from physical and chemical damage in high-temperature environments.
2, Low temperature tolerance design
In low-temperature environments, AISG cables also face various challenges, including material hardening, embrittlement, decreased insulation performance, and weakened mechanical strength. To address these challenges, the low temperature tolerance design of AISG cables should follow the following principles:
Choose cold resistant insulation materials: Insulation materials should not become brittle or lose their insulation properties at low temperatures. Insulation materials that can maintain flexibility and insulation performance at low temperatures, such as cross-linked polyethylene (XLPE) or silicone rubber, should be selected. These materials can still maintain good electrical performance and mechanical strength at low temperatures.
Enhance the flexibility of cables: In low-temperature environments, cables should be able to maintain good flexibility, making them easy to lay and install. The flexibility and bending resistance of cables at low temperatures can be improved by optimizing their structural design, such as using multiple strands of fine copper wire twisted conductors.
Preventing internal icing of cables: Special design and material selection can effectively prevent internal icing of cables and ensure the stability of power transmission. For example, insulation materials can be filled inside the cable or waterproof and moisture-proof sheath materials can be used to reduce the risk of moisture intrusion and freezing.
Choose the appropriate sheath material: The sheath material needs to prevent the cable from external physical damage and chemical corrosion, while maintaining good flexibility at low temperatures. Cold resistant chloroprene rubber or polyethylene (PE) with low-temperature flexibility is a better choice. These materials can still maintain elasticity at low temperatures, avoiding exposure of the insulation layer and conductors inside the cable to harsh environments due to sheath rupture.
Consider the mechanical strength at low temperatures: In low temperature environments, the mechanical strength of cables may weaken. Therefore, the use of conductors and sheath materials with higher mechanical strength should be considered in the design to ensure the stability and reliability of the cable at low temperatures.
3, Optimization strategy
In addition to the above design principles, the high and low temperature tolerance of AISG cables can be further improved through the following optimization strategies:
Adopting a multi-layer shielding structure: The multi-layer shielding structure can effectively improve the anti-interference ability and electromagnetic compatibility of the cable, and reduce the influence of external electromagnetic fields on the internal signals of the cable. At the same time, the shielding layer can also provide some mechanical protection, enhancing the durability of the cable.
Strengthening the waterproof and moisture-proof performance of cables: The waterproof and moisture-proof performance of cables is particularly important in high and low temperature environments. The waterproof and moisture-proof performance of the cable can be improved by adding waterproof and moisture-proof agents to the cable sheath, using waterproof joints, or adopting other waterproof measures.
Conduct rigorous performance testing: During the design and production process, AISG cables should undergo rigorous performance testing, including electrical performance testing under high and low temperature environments, mechanical performance testing, and environmental adaptability testing. This helps ensure that the cable can meet performance requirements in both high and low temperature environments in practical applications.
Choose the appropriate cable cross-section: In high temperature environments, the current carrying capacity of the cable will be affected. When designing, the appropriate cable cross-section should be selected based on the actual ambient temperature and the allowable working temperature of the cable to ensure that the cable will not overheat at high temperatures. At the same time, in low-temperature environments, the variation of cable current carrying capacity should also be considered to ensure that it can meet the power transmission needs at low temperatures.