Dry-type transformer aluminum strip is a key raw material for manufacturing transformer windings, and is a ribbon obtained by embossing aluminum ingots.
The aluminum ribbon and foil for dry-type transformers are made of high-quality pure aluminum. They have high electrical conductivity and soft texture. The surface is smooth and burr-free. It is an ideal material for the production of dry-type transformers and a key raw material for manufacturing transformer windings. Many technical indexes such as electrical conductivity of aluminum strip and foil, burr curling, side bending and surface quality are required.
Aluminum strips and foils for dry-type transformers are generally made of 1060 aluminum strips, which are more than 99.6% aluminum and are also called pure aluminum sheets. They belong to a commonly used series in the aluminum strip family. The advantages of this series of aluminum plates: the most commonly used series, the production process is relatively simple, the technology is relatively mature, and the price has great advantages over other high-grade alloy aluminum plates. With good elongation and tensile strength, it can fully meet the normal processing requirements (stamping, drawing) and high formability. For industrial pure aluminum, it has high plasticity, corrosion resistance, electrical conductivity and thermal conductivity, but its strength is low, heat treatment can not enhance the machinability; gas welding, hydrogen atom welding and contact welding are not easy to braze; Pressure processing and extension, bending.
Dry-type transformer aluminum strips have a high aluminum content, while aluminum’s electrical conductivity and thermal conductivity are just lower than conventional copper. Since the price of copper is much higher than that of aluminum, the most commonly used material for transformer belts is aluminum strip. The utility model can make the dry type transformer have the advantages of small volume, light weight, good insulation performance, flame retardant, no pollution, partial discharge, moisture resistance, stable and reliable operation, low noise, low maintenance cost, etc., in high-rise buildings and underground. Facilities, commercial centers, residential areas, hotels, restaurants and coastal wet areas are widely used.
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