Switching operations (i.e. discharges in SF6 - filled equipment) over time lead to an increasing amount of moisture and highly corrosive decomposition products such as acid in switchgear tanks. These impurities impede the long-term safe operation of switchgear by creating compounds that corrode the interior surfaces of the tank over time and lower the amount of SF6 gas available for arc quenching. Keeping track of the acidity, moisture, and SF6 percentage in a tank is needed to ensure the long-term operational safety of a breaker.
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