Correcting Overheating of Large Rectifier Unit for a Primary Aluminum Manufacturer January 13, 2016 Result EFI Group was able to determine the root cause of overheating for two large rectifier units, develop a comprehensive solution, compile the required equipment specifications and obtain detailed quotes from several vendors for equipment that would allow the rectifiers to operate at maximum capacity. Challenge The processing of aluminum requires a large amount of DC electrical current. In large rectifier units that generate large amounts of waste heat during the process, electricity is transformed from Alternating Current (AC) to Direct Current (DC). Two of the client’s rectifiers could not run at maximum ratings without overheating, reducing the amount of aluminum the plant could

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