Overhead power transmission lines have made our lives more convenient, and steel-cored aluminum stranded wire is an essential product. As the name suggests, this type of aluminum stranded wire consists of aluminum wire as the base and steel wire, which are combined through a stranding process. It has high sales volume and is used by many departments. Most cable manufacturers produce this product, and its quality is a crucial factor. When choosing it, we should pay attention to the following points:
As we all know, problems with power transmission have a huge impact on our lives. Therefore, the selection of steel-cored aluminum stranded wire is very important.
Choosing high-quality stranded wire ensures stable power transmission from the source. However, there are many manufacturers on the market, and consumers need to carefully select their products. Every year, relevant departments in various cities select outstanding companies, so we can conduct due diligence based on these government evaluations. Furthermore, the government provides certain support to some companies, and these companies are generally more reliable.
At the same time, we should also understand the material composition of the stranded wire, such as the characteristics of steel and aluminum, so that we can compare them through cross-sections.
Generally, price and quality must be considered together; considering only one aspect is insufficient. Choosing substandard stranded wire will result in significant financial costs for later repairs. Currently, branding of stranded wire is still developing nationwide, requiring us to understand stranded wire knowledge before making a selection. Thorough market research is essential.
How to select power cables and steel-cored aluminum stranded wires for substations? Transmission lines, or power lines, operate year-round, requiring a comprehensive consideration of both investment and operational economics. Therefore, the specifications of cables or bare conductors should be selected based on economic current density.
From the user's distribution transformer to the user's electrical equipment, the conductors used are generally not continuously operating for long periods and are fewer in number, so the maximum current can be used for selection.
Regarding economic current density: The size of the conductor cross-section affects line investment and energy loss during operation. On the one hand, to save investment, a smaller conductor cross-section is required; on the other hand, to reduce energy loss, a larger conductor cross-section is required. Considering all factors, a reasonable conductor cross-section is determined, called the economic cross-sectional area, and the corresponding current density is called the economic current density.
