Turkey’s power transformer production is handled by domestic manufacturers and local branches of global OEMs that specialize in MV/HV equipment. These companies supply distribution transformers, substation units, and large power transformers for utilities, industry, and export. For SEO or market-mapping content, the question targets manufacturer portfolios, voltage classes, MVA ranges, and compliance with IEC/EN standards, rather than individual brand names, which change over time through mergers and acquisitions.