![New technology to lower environmental impact of HV transformers](https://transform.zgisoft.com/files/09cc580c46cf6c30f2dc059f859d0c39-340x210.jpg)
New technology to lower environmental impact of HV transformers
ABB has successfully tested a new solution to replace petroleum-based mineral oil insulating medium with environmentally friendly natural ester fluid in the world’s largest sealed 200 MVA, 420 kV single-phase transformer.