ACSR busbar steel core aluminum stranded wire JL/G1A800/55 overhead insulated wire

Description :

　　 ACSR busbar steel core aluminum stranded wire JL/G1A800/55 conductor Overhead insulated conductor

　　Application and function of steel cored aluminum stranded wire:

　　 Steel cored aluminum stranded wire, 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.

　　Main applications:

　　 Steel cored aluminum stranded wire is used for high-voltage transmission lines. Due to the limited path of the line and the inability to install 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, where 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.

　　 The models of steel cored aluminum stranded wire are divided into: JL/G1A JL/G1B JL/G2A JL/G2B JL/G3A

　　Among them, G1A or G1B refers to ordinary strength steel wire.

　　G2A or G2B refers to high-strength steel wire.

　　G3A refers to ultra-high strength steel wire.

　　 Steel cored aluminum stranded wire is made by twisting aluminum wire and steel wire, and is suitable for overhead transmission lines.It has a steel "core" inside and is wrapped around the steel core with aluminum wire twisted together on the outside; Steel core mainly serves to increase strength, while aluminum stranded wire mainly serves to transmit electrical energy;

　　 Corresponding to "bare" wires, there are also overhead insulated wires, mostly JKLYJ, which are overhead aluminum cross-linked poly encapsulated wires; It has been widely used in urban areas and distribution systems with high requirements for power supply reliability in China. Although the price is high, it is the development direction of distribution lines.

　　 Steel cored aluminum stranded wire belongs to bare conductors. Currently, aluminum clad steel stranded wire (LGJ) is widely used as the conductor in China; Steel core mainly serves to increase strength, while aluminum stranded wire mainly serves to transmit electrical energy. The cross-sectional area of the wire varies depending on the voltage. For example, currently the wires for domestic 500 kV transmission lines are generally LGJ-8000/55 wires. L is the abbreviation for aluminum wire, G is the abbreviation for steel core, J is the abbreviation for stranded wire, 800 is aluminum 800 square millimeters, and 55 is steel 55 square millimeters.

　　 Nowadays, in many fields, if electricity needs to be transmitted, people choose steel cored aluminum stranded wire to transmit electricity. In many factories, the high transmission capacity of steel cored aluminum stranded wire is the reason why many factories choose it. And its long service life can meet the advocacy of energy conservation, making it a new type of wire worth using.

　　Steel cored aluminum stranded wire structure:

　　 Steel core has high mechanical strength, aluminum has high conductivity (low resistance coefficient), and a small specific gravity. Steel cored aluminum stranded wire combines these advantages and is of high quality, suitable for high-power, high-voltage, long-distance power transmissionHowever, steel stranded wire only has high mechanical strength, and steel cored aluminum stranded wire is not suitable for power transmission. Currently, for domestically produced steel cored aluminum stranded wire, there are two aspects that determine its quality characteristics. On the one hand, it is the production process and technological level. The higher the process level and technological capability, the better the quality produced. Specification of steel cored aluminum stranded wire: 10/2~1440/100, in accordance with standard GB/T1179-2017.

　　 ACSR busbar steel core aluminum stranded wire JL/G1A800/55 conductor Overhead insulated conductor

　　One Main technical parameters:

　　1. The galvanized steel wire in the steel core aluminum stranded wire shall comply with the provisions of GB3428-82 "Galvanized Steel Wire for Steel Core Aluminum Stranded Wire" and Appendix D of GB1179-83

　　2. Aluminum wire should comply with the requirements of GB/T1179-1. "Round Wire with Same Core Twisted Frame Empty Wire" in terms of material. LY9 electrical round aluminum wire should be used, with a resistivity of 9g not exceeding 0.028264.2m/m and a tensile strength.

　　3. Physical parameters of aluminum stranded wire

　　4. The ratio of twisted pitch diameter of aluminum stranded wire shall comply with the provisions of Table 5; The twisted joint diameter ratio of steel cored aluminum stranded wire shall comply with the requirements of Table 6 4.5 Process Quality

　　5. Twisted wires should be neatly twisted without any missing wires, broken wires, jumper wires, or loose strands. 4.5.2 Connectors

　　6. Hard aluminum wire is allowed to have joints before drawing. But if all of the following conditions are met, the finished hard aluminum wire is also allowed to have a joint:

　　a) The weight of the coiled hard aluminum wire is 50okg or more;

　　b) There should be no more than one joint in the coiled hard aluminum wire;

　　c) The number of turns of this type of coiled hard aluminum wire with one joint shall not exceed 10% of the total number of turns

　　d) When requested by the user, the manufacturer shall provide proof that the tensile strength of the joint is not less than 130Mpa. The markings that should be placed on the finished hard aluminum wire with one joint. 4.5.2.2 Galvanized steel wire is not allowed to have joints.

　　Transportation and packaging 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.

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• aluminum conductor steel reinforced (ACSR)