For Transformer Winding: Copper Strip V Aluminum Strip
Aluminum strip and copper strip are the common metal materials for transformer winding. Which is better? The differences between copper and aluminum strip for transformer winding lies in the electrical and thermal conductivity.
In terms of electrical conductivity, copper strip has a higher conductivity than aluminum. That is to say, under the same conductivity and current, the amount of aluminum will be larger. However, since the copper price is much higher than aluminum, the production cost of copper transformer winding is twice that of aluminum transformer.
In principle, whether the transformers are made of aluminum strip or copper strip, as long as it can meet the national standards, they are both safe and reliably meet the requirements of operation. Due to design reasons, aluminum transformers are thinner and lighter than copper transformers.
Due to the different characteristics of aluminum and copper such as specific gravity, resistivity, conductivity, etc., the unit price of aluminum strip and copper strip is different. Under the premise of meeting the same standards, the cost of aluminum strip is only about 70% of the copper strip. The overall cost of aluminum transformer is also lower.
It seems that the thermal stability and dynamic stability of the aluminum strip is not as good as the copper strip, but the current density that can be taken by aluminum conductors is much lower than that of copper conductors (under the condition that the load loss and temperature rise of the transformer are guaranteed). The final result is that aluminum strip is not necessarily worse than copper strip in these two aspects.
In oil-immersed transformers, aluminum has better oxidation resistance than copper. In epoxy resin transformers, the expansion coefficient of aluminum strip is closer to that of epoxy resin. Regarding the manufacturing process of transformer, copper transformer manufacturing process is more mature and simpler.
As a big aluminum strip supplier, Haomei Aluminum has different alloys of aluminum strips for transformer winding such as 1050, 1060,1070 and 1350 aluminum strips. Welcome to inquire the latest price from us directly.
Original source: https://www.hm-alu.com/a/for-transformer-winding-copper-strip-v-aluminum-strip.html
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