JL/G1A-800/100 production and processing of steel cored aluminum stranded wire

Description :

　　 JL/G1A-800/100 production and processing of steel cored aluminum stranded wire

　　Introduction to the use of steel cored aluminum stranded wire;

　　 Steel cored aluminum stranded wire, model JL/G1A-800/100 Details English name: Aluminum conductor steel reinforced，ACSR。 It is a reinforced conductor with single or multiple layers of aluminum stranded wires twisted outside a galvanized steel core wire. Mainly used in the power and transmission line industries.

　　 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 laying in special geographical conditions such as crossing rivers and valleys. It has good conductivity and sufficient mechanical strength, high tensile strength, and the tower distance can be enlarged. Therefore, it is widely used in overhead transmission and distribution lines of various voltage levels.

　　 For high-voltage transmission lines, due to the limited path of the line and the impossibility of installing multiple lines on one path, people have come up with the method of using one path, one set of iron towers, and hanging multiple wires, that is, one line is equivalent to installing multiple lines; For 500KV transmission lines, China mostly adopts the method of hanging four wires, which is called the same tower parallel installation.

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

　　 Model JL/G1A-800/100 6.6.4 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. JL/G1A-800/100 production and processing of steel cored aluminum stranded wire

　　 Steel cored aluminum stranded wire should be delivered in reels, with the distance between the outermost layer and the edge of the cable reel side panel not less than 30mm, and properly packaged. The two twisted wires connected together during packaging should have at least half of the aluminum wire cut at the connection point, and the two sides of the connection point should be firmly tied. The cable reel shall comply with the provisions of GB4005-83 "Delivery reels for wires and cables". Short stranded wires are allowed to be delivered in loops, and each loop should be tied at least three times and properly packaged. The product should be inspected and qualified by the manufacturer before leaving the factory, and each product leaving the factory should be accompanied by a quality inspection certificate.

　　Steel cored aluminum stranded wires are arranged in a criss crossing manner on transportation vehicles such as vehicles and ships. The cable reels must be placed steadily, and both sides must be firmly fixed to the transportation vehicle with steel wire ropes. The bottom of the cable reels should be plugged with triangular wedges to prevent them from shaking, colliding, or tipping over during transportation. When transporting large cable reels, attention should be paid to selecting road transportation equipment. If using heavy-duty trucks for transportation, the height of the truck should comply with the height restrictions of bridges, culverts, etc. on the traffic road. If the limit is exceeded, a dedicated trailer can be used to reduce the transportation height. When the cable reel rolls on the ground, it must be rolled in the direction indicated by the arrow on the side of the cable reel. Rolling in the opposite direction will cause the cable to unwind and loosen. For cables without protective plates, the two side plates must protrude more than 10cm from the outer layer of the cable when rolling. During rolling, hard objects should be prevented from pressing under the cable reel to avoid damaging the cable. When rolling the cable reel, it should be controlled within a small distance range, and special equipment such as forklifts or cranes should be used for long-distance movement

AfterSalesService :

• aluminum conductor steel reinforced (ACSR)