siemens sf6 Alternatives Charging in UzbekistanBased on the existing circuit-breaker design, the pure SF6 filling will be replaced by a composition of • 43 percent SF6 and 57 percent CF4 for applications down to -50 &C, and • 25 percent SF6 and 75 percent CF4 for conditions down to -60 &C. Additionally, the rated filling pressure is increased by 1.5 bar to 7.5 bar.
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