The first product was put into operation in 1996 and supplied in bulk in 2000. It is now the leading product of the company's power transformers, with a maximum operating altitude of over 4500 meters and a high-altitude technology level that has reached advanced levels in China. It has the characteristics of low loss, low noise, strong short-circuit resistance, strong overload capacity, and strong adaptability. In 2020, according to the national standard "GB20052-2020 Energy Efficiency Limit Values and Energy Efficiency Grades for Power Transformers", low loss products that meet energy efficiency levels 1, 2, and 3 will be fully launched. The product capacity ranges from 2000kVA to 420000KVA and is widely used in Guonan Grid, 5 large and 6 small power generation companies, as well as high-speed rail, smelting and other enterprise users. The products are oriented to the national "West East Power Transmission", "Cloud Power Transmission", hydropower silicon, hydropower aluminum industry, wind power, photovoltaic and energy storage and other fields. Following the national "the Belt and Road" policy, the products are sold to more than ten countries, including Ethiopia, Laos, Vietnam, Myanmar, Cambodia, Pakistan and Angola. In 2000, in order to solve the transportation problem in the plateau area, the company launched a three-phase combined power transformer, which is widely used in Yunnan, Guizhou and Xizang. It led the development of the national standard Three phase Combined Power Transformer (GB/T 23755), passed the provincial new product appraisal, and won the second prize in Yunnan Province and the second prize in China's machinery industry for scientific and technological progress.