The S22 series Grade 1 energy efficiency oil-immersed transformer is a high-efficiency product compliant with the GB 20052-2020 standard.
Developed through the application of new materials and advanced manufacturing processes—integrating independent innovation with technical imports—this series features optimized core and coil structures to reduce both no-load loss and noise.

The noise level is reduced by an average of 20% compared to the current national standard JB/T 10088-2016, reaching advanced domestic performance levels. Compared to Grade 2 energy efficiency products, the Grade 1 series offers significantly lower losses and superior energy-saving
performance.