Retrofill application of 420 kV Gas Insulated lines with fluoronitrile based gas mixture

Following years of innovation and development of SF 6 high-voltage equipment, the power grid sector faces significant challenges in reducing greenhouse gas emissions and adopting more sustainable technologies. Recent changes in F-gas regulations [1] require transmission system operators (TSOs) to procure new products that eliminate the use and emissions of SF 6 in gasinsulated switchgear for new substation installations.