Siemens has successfully short-circuit tested a natural ester-filled power transformer at the KEMA test facility in the Netherlands, one of 14 eco-friendly transformers manufactured to replace 50-year-old generator transformers in a hydropower plant in the U.S.

For this project, the Siemens transformer plant in Linz (Austria) designed 14 natural ester-filled power transformers rated at 125 MVA, with output voltages of either 345 or 230 kV.

According to the manufacturer, this single-phase generator-step-up transformer represents three milestones. It is the first 345 kV natural ester-filled generator step-up transformer worldwide, the first 345 kV natural ester-filled power transformer tested at the KEMA test facility and the first 345 kV natural ester-filled power transformer successfully tested for a project in the USA.

By producing ester filled transformers, Siemens is contributing to the United Nations Sustainable Development Goals number 7 and number 9: "Ensure access to affordable, reliable, sustainable and modern energy for all" and "Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation".

Source: Siemens