SF6-alternative gases for application in gas-insulated ...· Although some progress has been made, such as ABB's production of a CO 2 GCB and use of a C5-PFK mixture for 170 kV GIS and 22 kV primary switchgear, and Alstom's use of a C4-PFN mixture for a 245 kV current transformer and a 420 kV GIL [20, 31, 32, 34, 38–40], there are still many important issues that need to be addressed.
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Careers — ABB Group is a leading global technology company that energizes the transformation of society and industry to achieve a more productive, sustainable future. With a history of excellence stretching back more than 130 years, ABB's success is driven by about 110,000 talented employees in over 100 countries.
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