Copper versus Aluminium
With over 30 years of experience in the use of aluminium in the manufacturering of windings used in distribution transformers. The choice of the material for the conductors depends on price and on market availability. Demand and supply of both aluminium and copper varies considerably and therefore so does price and supply for the manufacturing of transformers.
The dimension of a transformer with copper windings is smaller than one with aluminium windings, because less copper is needed for the windings 9With respect to cost it depends on que quotations of aluminium and copper in the LME ( London Metal Exchange) 9After carrying out many studies ABB has come to the conclusion that when the ratio of the quotations of Copper/Aluminium is > 1.25, the use of alumium reduces the total cost of materials in the manufacturing of a transformer 9Since 2005 the price of copper is increasing steadily. 9At the moment the ratio of Copper/Alumium is > 2, therefore the use of aluminium is the best option.
Cu USD/ton
Al USD/ton
Performance of distribution transformers
ƒWith respect to the performance there is no difference between transformers which have copper windings and those which have alumium ones. ƒAluminium has a greater heat capacity than copper (approx 2.35 times) and therefore makes it more suitable to bear higher tensions. ƒThe life span of a transformer depends on the aging of the insulation system. Since both copper and alumunium windings work at the same temperatures established by international market standards, the aging of the insulation system is the same. However because aluminium has a greater heat capacity this gives it a some advantage over copper .
CONTACT LIGHTHOUSE STANDARD COMPANY FOR YOUR ORIGINAL ABB TRANSFORMERS.
CALL 08188723968 OR 08033514047
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