Why aluminium wound transformers are cost efficient

White papers

By Lapex Ltd

Enjoy a longer life from the comparable copper wound units Copper as well as aluminium oxidise over time. Aluminium oxide hinders chemical reaction of the metal with the conductor insulation. Aluminium oxide contributes as a good electrical insulator. However, Copper in contrast oxidises completely over time. Copper also acts as a mild catalyst, accelerates the decay of the insulation around the conductor. Therefore, aluminium wound transformers enjoy typically five years longer life than comparable copper wound units and avoid copper price escalation.

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