SINTEF, NTNU, and ABB Collaborate on SF₆-Free Circuit Breakers for Norwegian Power Grids
Norwegian researchers from SINTEF, NTNU, and ABB are developing circuit breakers to replace sulphur hexafluoride (SF₆), a potent greenhouse gas. The EU mandates SF₆-free medium-voltage breakers starting January 2023, with a deadline for high-voltage systems set for 2032. Norway plans to implement similar regulations. The project aims to utilize pressurized air as an insulation medium and eliminate PFAS, another harmful substance. Initial prototypes show promise, and the initiative is supported by Norway's Research Council.

SINTEF, NTNU, and ABB are collaborating to develop SF₆-free circuit breakers for the Norwegian power grid, responding to EU regulations mandating the phasing out of sulphur hexafluoride due to its significant greenhouse gas impact. New medium-voltage breakers must be SF₆-free from January 2023, with high-voltage systems required by 2032.
The project employs pressurized air for insulation, aiming to address both SF₆ and PFAS concerns, with early prototypes yielding positive results. This initiative is part of a broader commitment to green transition and innovation in Norwegian industry.




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