- Description
-
Steel cored aluminum cable, also known as Aluminum Conductor Steel Reinforced (ACSR), is a cable used on overhead power lines. It uses a strong tensile steel wire as the core of the conductor and is surrounded by aluminum wire for power supply.
The outer layer uses aluminum wire because aluminum has good conductivity, light weight, and is inexpensive. The inner layer uses steel wire due to its strong tensile strength. Fortunately, although the conductivity of steel wire is poor, due to the skin effect, most of the current passes through the outer layer of the cable. Therefore, it doesn't matter if the conductivity of the inner layer is poor, the higher the impedance of the inner layer, the better.
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;
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 "four split line". In fact, these four split lines are ordinary four steel core aluminum stranded wires, without any special features, not one wire made of steel and three wires made of aluminum; Corresponding to "bare" wires, there are also overhead insulated wires, mostly JKLYJ, which are overhead aluminum material cross-linked polyvinyl chloride 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 Strand-6
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- Description
-
Steel cored aluminum cable, also known as Aluminum Conductor Steel Reinforced (ACSR), is a cable used on overhead power lines. It uses a strong tensile steel wire as the core of the conductor and is surrounded by aluminum wire for power supply.
The outer layer uses aluminum wire because aluminum has good conductivity, light weight, and is inexpensive. The inner layer uses steel wire due to its strong tensile strength. Fortunately, although the conductivity of steel wire is poor, due to the skin effect, most of the current passes through the outer layer of the cable. Therefore, it doesn't matter if the conductivity of the inner layer is poor, the higher the impedance of the inner layer, the better.
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;
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 "four split line". In fact, these four split lines are ordinary four steel core aluminum stranded wires, without any special features, not one wire made of steel and three wires made of aluminum; Corresponding to "bare" wires, there are also overhead insulated wires, mostly JKLYJ, which are overhead aluminum material cross-linked polyvinyl chloride 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
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