Chromatic Comparison of Environmental Factors of High-Voltage Circuit Breaker Gases

Although SF₆ is a powerful high-voltage insulating gas, it is also recognised as one of the most serious greenhouse warming gases (Stocker et al., 2013; Seeger et al., 2017). Alternatives have been considered from an environmental aspect as well as current interruption capabilities (Kieffel et al., 2016; Seeger et al., 2017). Three gas properties with environmental implications have been suggested as boiling point (BP) (^°C), greenhouse warming potential (GWP) and toxicity (TOX) (Uchii et al., 2002; Preve et al., 2015; Gentils et al., 2016; Preve et al., 2016; Kieffel et al., 2016; Seeger et al., 2017). Some preferred pure gases with SF₆ replacement potential are

Fluoroketones (C₅F₁₀O)

Fluoronitrile (C₄F₇N)

Carbon Dioxide (CO₂)