Transformer Overhauling is a comprehensive procedure for a transformer's internal and external components to enhance its lifespan and operational efficiency. The process typically begins with a thorough inspection and diagnostic testing to identify all potential issues. The transformer is then de-energized, the oil is drained, and the core and windings are lifted out of the tank for detailed inspection and cleaning. Technicians replace damaged components like bushings, gaskets, and winding insulation. The old oil is replaced with fresh, high-quality transformer oil, and the tank is resealed. Companies like Saini Transformer and Power Engineers & Contractor in the Gurugram area specialize in this service, performing rigorous tests post-overhaul to ensure the transformer is restored to its optimal condition and can operate reliably for many more years.