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- The Function of the Steel Core Aluminum Stranded Wire
The Function of the Steel Core Aluminum Stranded Wire
The steel core aluminum stranded wire has the advantages of simple structure, convenient erection and maintenance, low circuit cost, large transmission capacity, and favorable for laying across special geographical conditions such as rivers and valleys, has good electrical conductivity and sufficient mechanical strength, and has high tensile strength, tower rod distance can be enlarged and so on. Therefore, it is widely used in overhead transmission and distribution lines of various voltage levels.
The interior of steel-cored aluminum stranded wire is a steel "core". The outside is wrapped around the steel core by means of aluminum strands after being twisted. The steel core is mainly used to add strength, and the aluminum strand is mainly used to transmit electric energy. For high-voltage transmission lines, because the route of the line is limited, it is impossible to put multiple lines in one route. Everyone came up with a way to choose an approach, a set of towers, hanging multiple wires, that is, a line equivalent to a method of multiple lines; For the transmission lines of 500kv, most of China chooses the method of hanging four wires, which is named "four split lines". Originally, these four wires are four steel core aluminum strands, nothing special, not one is steel, three are aluminum; Corresponding to "bare" conductors, there are also overhead insulated conductors, most types are JKLYJ. It is an overhead aluminum cross-linked PVC encapsulated conductor. It has been widely used in Chinese cities and distribution systems with high reliability requirements for power supply, despite the high price, But it is the development direction of distribution line.
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- What are the Advantages of Steel Core Aluminum Stranded Wire?
What are the Advantages of Steel Core Aluminum Stranded Wire?
Mechanical properties of steel core aluminum stranded wire
The steel core aluminum strand has the advantages of small rebound, high flexibility, good bending performance and easy terminal connection. Special formulation and heat treatment processes greatly reduce the tendency of metals to creep under heat and pressure. The coefficient of thermal expansion is slightly higher than other types of cables, and it expands or contracts more. The steel core aluminum strand greatly improves the connection performance of the traditional aluminum cable, which is the fundamental reason why it is loved by the majority of users. Especially when the conductor is exposed to fire, it produces high-strength creep resistance, which ensures connection stability even under prolonged overload and overheating. The advantages of the stranded wire are numerous and worthy of the user's choice.
Advantages of Steel Core Aluminum Strand Wire
Steel core aluminum stranded wire has excellent electrical conductivity, thermal conductivity and corrosion resistance. Corrosion resistance: When the surface of the steel core aluminum strand is in contact with air, a thin and strong oxide layer is formed immediately. This oxide layer is particularly resistant to various forms of corrosion. Aluminum has the characteristics to withstand the harshest environments, so aluminum as a tray is much better than other wires.
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