Transformer revitalization is an important resource for improving the efficiency and reliability of equipment in a production process, especially in an energy-intensive industry. In this context, WEG has completed the overhaul of three high-current rectifier transformers rated at 37.65 MVA and 104/0.611–0.611 kV, which had already been in operation for four decades.

Choosing to refurbish transformers helps reduce environmental impact, since updated components increase efficiency while avoiding the disposal of material from older equipment which, with the proper replacements, can continue operating in perfect condition for another full lifecycle.

For this solution, WEG replaced all windings, cleaned the silicon-steel core, and dried the active part using a Vapor Phase system with temperature control. In addition, all accessories were replaced, and the tank received blasting and new painting, providing adequate external protection for the steel plant environment. All transformers were tested in WEG’s laboratory according to updated standards, ensuring continuous and reliable operation after being reinstalled in the customer’s substation.

Refurbishment is a fast and cost-effective solution compared to complete transformer replacement, while extending the useful life of equipment considered obsolete and ensuring that the electrical infrastructure continues to operate efficiently, reliably, and safely.