JL/G1A-185/25 Heilongjiang Steel Core Aluminum Stranded Wire Manufacturer

Description :

　　 Production of JL/G1A-185/25-24/7 Heilongjiang Steel Core Aluminum Stranded Wire Manufacturer

　　Main applications and characteristics of steel cored aluminum stranded wire:

　　 For high-voltage transmission lines, due to the limited route of the line and the inability to install multiple lines on the same route, people have come up with the method of using a single path, a set of iron towers, and hanging multiple wires, that is, one line is equivalent to installing multiple lines. For 500KV transmission lines, most countries use the method of hanging four wires, which is called the same tower parallel installation.

　　Characteristics of steel cored aluminum stranded wire:

　　 Steel cored aluminum stranded wire has the characteristics of simple structure, easy installation and maintenance, low line cost, large transmission capacity, and is conducive to optimal laying across mountains, rivers, and valleys with special geographical conditions. It has good conductivity and sufficient mechanical strength, high tensile strength, and can amplify tower distance. Therefore, it is widely used in overhead transmission and distribution lines.

　　Tensile strength of single wire

　　 The single wire tensile strength test should be conducted on the single wire selected from the stranded wire, and the sample should be straightened without stretching or damaging the sample during operation. ten

　　GB/T 1179—2017

　　The cross-sectional area of a single wire should be measured using the diameter measurement method specified in 6.6.1.3, and then the straightened single wire should be installed on a suitable tensile testing machine and gradually subjected to a load. The movement speed of the clamp should not be less than 25 mm/min, nor more than 100 mm/min.

　　The fracture load divided by the cross-sectional area of the single wire should not be less than 95% of the corresponding tensile strength before twisting (5% loss is considered due to the decrease in tensile strength caused by the processing and twisting of the single wire during the twisting process).

　　 resistivity

　　If necessary, the resistivity of the single wire should be measured on the selected single wire from the stranded wire. The sample should be manually straightened and measured according to the method specified in GB/T 3048.2-2007. The test results should meet the requirements of the corresponding single wire standard. Except for galvanized steel stranded wire, resistivity measurement is generally not required for all galvanized steel wires.

　　Surface condition

　　The surface of the stranded wire should meet the requirements of 5.3. 6.6.7 Pitch to diameter ratio and twist direction

　　The pitch to diameter ratio of each layer of twisted wire should be the ratio of the measured pitch to the outer diameter of that layer.

　　The measured values should meet the requirements of 5.4. In addition, attention should be paid to the twisting direction of each layer, which should also comply with the requirements of 5.4.

　　7.1 Packaging

　　During normal loading, unloading, transportation, and storage, wires should be properly packaged to prevent damage.

　　The wires should be delivered in reels, with the distance between the outermost layer and the edge of the cable reel side panel not less than 30 mm, and properly packaged. The two wires connected together should have at least half of the single wire cut at a distance of not less than 15 cm from the connection point, and the fracture should be tightly tied.

　　The delivery tray shall comply with the provisions of JB/T 8137-2013 (all parts), or may be agreed upon by the supply and demand parties through mutual agreement. Short section wires are allowed to be delivered in loops, and each loop should be tied at least three times and properly packaged.

　　7.2 Each coil or turn of wire should be labeled with:

　　Each coil or turn of wire should be labeled with the following information:

　　a) Manufacturer name, manufacturer serial number (if any); b) Wire model, nominal cross-section, and number of single wires;

　　eleven

　　GB/T 1179—2017

　　c) Shipping, rotation direction, or line marking; d) The marking that the spool cannot be placed flat during transportation; e) The length of each wire from outside to inside, m; f) Gross weight and net weight, kg;

　　g) Manufacturing date: Year/Month;

　　h) This standard is numbered GB/T 1179-2017.

　　Model:

　　 The model of steel cored aluminum stranded wire is represented as LGJ; The model of aluminum stranded wire is represented as LJ3. Standard adopted:

　　 Steel cored aluminum stranded wire adopts the following standards

　　 3.1 GB1179-83 "Aluminum Stranded Wire and Steel cored Aluminum Stranded Wire";

　　 3.2GB3428-82 "Galvanized Steel Wire for Steel cored Aluminum Stranded Wire"

　　 3.3 TB1008-99 "Code for Design of Railway Electric Power"

　　 3.4 GB/T1179-1999 "Round Wire with Same Core Stranded Hollow Wire" 3.5 GB/T17048-1997 "Hard Aluminum Wire for Overhead Stranded Wire"

　　 Specification of Steel cored Aluminum Stranded Wire 10/2~1440/100 Implementation Standard GB/T1179-2017

　　 JL/G1A-185/25 Heilongjiang Steel Core Aluminum Stranded Wire Manufacturer

AfterSalesService :

• aluminum conductor steel reinforced (ACSR)