Large manufacturers are essential for sectors that need high-MVA, high-voltage transformers: national and regional utilities, interconnectors, HVDC projects, big generation plants (thermal, nuclear, hydro), large mining operations, steel mills, mega-refineries, and large data center campuses. These clients require engineered-to-order units, complex testing, long-term support, and fleet-level condition monitoring, which only major OEMs or specialized heavy-industry manufacturers can provide at scale.