The 330 kV oil‑immersed transformer is an extra‑high‑voltage three‑phase oil‑immersed power transformer (maximum system voltage Um=363 kV). It is the core main equipment of China’s Northwest 330 kV main transmission network. It is mainly divided into double‑winding power transformers, three‑winding autotransformers, generator main transformers and other types. Designed and manufactured in accordance with GB 1094, GB/T 6451, IEC and other standards, it adopts transformer oil for insulation and cooling, and is used for step‑up, step‑down and power exchange of long‑distance and large‑capacity electric energy.

The 220 kV oil‑immersed transformer is a high‑voltage large‑capacity oil‑immersed power transformer (maximum system voltage Um=252 kV). Researched and manufactured in accordance with domestic and international standards such as GB1094, GB/T6451 and IEC 60076, transformer oil performs the functions of insulation and heat dissipation. It is the core power transformation equipment for China’s 220 kV regional transmission grids and power plant step‑up stations. The products mainly cover two‑winding transformers, three‑winding transformers and three‑winding autotransformers, and are widely applied for electric energy step‑up, step‑down and power allocation between different voltage levels.

The 110kV Oil‑immersed Transformer Is A High‑voltage Oil‑immersed Power Transformer (Maximum System Voltage Um=126kV). It Is Designed And Manufactured In Accordance With GB1094, GB/T6451, IEC60076 And Other Standards. Using Transformer Oil As Insulation And Cooling Medium, It Acts As The Core Power Transformation Equipment For China’s Regional Power Grids And Urban Distribution Networks. The Product Includes Two‑winding, Three‑winding And Autotransformers, Mainly Used For Step‑down Power Transmission And Step‑up Transformation In Power Plants And New‑energy Stations To Realize Electric Energy Transmission And Voltage Conversion.

The 35kV Oil‑immersed Transformer Is A Medium‑high Voltage Oil‑immersed Power Transformer (Maximum System Voltage Um=40.5kV). It Is Designed And Manufactured In Accordance With GB1094, GB/T6451, IEC60076 And Other Standards. Adopting Transformer Oil As Insulation And Cooling Medium, It Is Widely Applied In Power Distribution And Medium‑small Power Transformation Scenarios To Realize Voltage Step‑up And Step‑down As Well As Electric Energy Distribution. The Product Is Mainly Three‑phase Two‑winding Type, And Three‑winding Models Are Also Available Upon Request. It Is Classified Into Two Types: Off‑circuit Tap Changing And On‑load Tap Changing.