The GB20052-2020 Standard Energy-Saving Level I Oil-Immersed Transformer is a product independently developed by our company through the application of new materials and processes, as well as a combination of independent innovation and technology introduction. By optimizing and innovatively designing the core and coil structure, we achieve the goal of reducing no-load losses and noise. The noise level is on average 20% lower than the current national standard JB/T10088-2016, and the product performance reaches the advanced level domestically. Compared to Level II energy-saving products, Level I energy-saving products have lower losses.