The S13 model is an independently developed product by our company, based on the original S11 distribution transformer. It achieves this through the application of new materials and processes, as well as through a combination of independent innovation and technology introduction. By optimizing and innovatively designing the core and coil structure, it reduces no-load losses and noise. The noise level is on average 20% lower than the current national standard JB/T10088-2016, with product performance reaching the advanced level domestically.