Medium-voltage circuit breakers are rated between 1 and 72 kV (the standard medium-voltage ... Sulfur hexafluoride (SF6): the arc is extinguished within a chamber filled with sulfur hexafluoride gas, ...

In 2022, Chubu Electric Power Grid announced its policy to adopt SF6-free circuit breakers up to 77 kV when they are replaced. Today, Chubu Electric Power Grid announced a progressive policy to ...