Around five performance aluminum cables

Safety performance of an aluminum cable , history proved ; 2 , testing and certification ; 3 , aluminum alloy composition effect ;
After adding rare earth alloy conductor components and iron and other ingredients, greatly improved the performance of its electrical properties and connections , especially when you add iron to produce annealed conductor creep resistance of high strength , when current overload, iron play continued connecting role in making aluminum conductor creep does not occur. Creep great harm to the cable , if the cable creep , its original point of contact pressure is not tight enough , the pressure Network Cabinet  is reduced so that the contact resistance increases rapidly after the current flow caused by overheating of the joints , if unscheduled maintenance, there will be security risks . Is very important to solve the problem of cable creep . Creep: metal temperature , force and its own weight , over time , permanent deformation will not be slow to recover , the phenomenon of creep. 4 , flame retardant cable insulation material used aluminum retardant silane cross -linked polyethylene (XLPE), the use of self-locking armored structure, thermal performance is far superior to PVC jacket material , the process can quickly heat , flames disappear after quickly extinguished the flames , then do not delay other materials , very excellent flame retardant properties . Aluminum cable using new materials and new technology , to ensure its use more secure. Electrical properties of an aluminum cable , cross-sectional area cable ampacity copper alloy conductors 1.5 times , alloy conductor and copper conductor electrical performance as implement the same carrying capacity , resistance, and pressure loss . The resistance between the aluminum alloy of aluminum and copper, aluminum slightly higher , but lower than copper , provided at the same flow cross section , the weight of the aluminum alloy conductor of equal length is only half the copper . If the conductivity of the copper at 100 %, the conductivity of the conductor is about 61.2% of the alloy , the fiber optic cable  proportion of the alloy is 2.7 , the proportion of copper is 8.9 , the (8.9/2.7) × (0.612 / 1) = 2, i.e., 2 the unit weight of the same alloy with a resistor of resistance of copper per unit mass , so that when the cross-sectional area of ​​the alloy is 1.5 times that of copper conductors is the same as the electrical properties , i.e. to achieve the same cross-sectional flow and copper , resistance, and voltage loss. Factors affecting the flow of electricity cables cut a lot , such as ; line characteristics ( such as the working electrode , a current type, frequency , load factor ) ; structure of wires and cables ( such as the structure of the conductive core , the core number , the type of insulating material , shield and structures and materials , the outer diameter of the inner and outer sheath of the total ) ; laying  conditions ( such as air laying, pipe laying, direct  burial, underground laying of the channel , underwater in laying ) ; conductive core maximum allowable operating temperature and ambient conditions ( such as air and soil temperature, soil thermal resistivity , heat around the proximity effect ) , etc. 2 , reducing the cable outer section of aluminum cable production process to squeeze the most advanced technology in Germany , so the conductor fill factor can reach 93 %. And aluminum cable uses a silane crosslinked polyethylene , polyvinyl chloride thickness of the insulation just 2/3 can be far more than conventional insulation. But generally only copper fill factor of 80%, is commonly used in PVC insulation , aluminum cable diameter so on the basis of copper increased by only 11% or less , you can have the same electrical properties of copper . Visible , no need to change the original use of aluminum cable duct design using copper cables . ( General designer piping size is 150% copper , considering the recent Capacity problems, the size of piping to 200% of the copper , so wear a tube is not a problem . )