The S11-M – S22-M series fully sealed distribution transformers are suitable for residential communities, commercial centers, high-rise buildings, remote mountainous areas, and places with high dust and pollution levels. These transformers feature advanced technology, excellent energy-saving performance, and significant application value. All performance indicators of this series comply with IEC standards and relevant national standards. The product design is reasonable, ensuring high operational reliability, noticeable energy-saving effects, strong overload capacity, and low noise levels. Compared to the S9 transformers, these transformers reduce no-load loss by an average of 30-50% and no-load current by 80-90%.

This series uses corrugated oil tanks made of 08 aluminum cold-rolled plates, resulting in a compact and aesthetically pleasing design. The insulation oil inside the tank is completely isolated from the external air, effectively preventing moisture and aging of the oil. Under normal usage conditions, the transformers are maintenance-free and inspection-free for twenty years, significantly reducing operational costs. These features make the S11-M and S22-M series the preferred choice for power grid upgrades and replacements.