GE Vernova Wins Contract for SF₆-Free GIS in Denmark
GE Vernova has secured a contract from Danish transmission system operator Energinet to supply 31 SF₆-free gas-insulated switchgear (GIS) bays for two 145 kV substations in Copenhagen, supporting Denmark's ongoing efforts to reduce greenhouse gas emissions from its electricity network.
The project includes the delivery of two ready-to-operate substations using the company's g³ gas-insulated switchgear, an alternative to SF₆, a widely used insulating gas with a high global warming potential. According to GE Vernova, g³ gas has a global warming potential approximately 99% lower than SF₆.
The equipment will be installed at the Amagerværket (AMV) and Vigerslev Koblingsstation (VIK) substations. Once completed, the AMV installation will comprise 22 GIS bays, making it the largest 145 kV g³ GIS installation of its kind, while the VIK substation will include nine bays.
The contract reflects Denmark's broader strategy to reduce emissions from grid infrastructure while expanding renewable energy integration. The country has introduced measures to discourage the use of SF₆, including a tax on the gas, encouraging utilities to evaluate lower-emission alternatives. Three Danish utilities—Energinet, Cerius, and Radius Elnet—have now adopted g³ technology for parts of their transmission and distribution networks.
According to the company, the project forms part of an ongoing shift toward lower-emission technologies in high-voltage substations as utilities modernize transmission infrastructure and seek alternatives to conventional SF₆-insulated equipment.
Source: GE Vernova
