
SF6 gas mass is heavier than air, in the case of not fully mixed with air, SF6 gas has a tendency to deposit in low places, such as cable trench, indoor bottom, the bottom of the container, etc. In these places where there may be a large amount of SF6 gas deposits, it is easy to be hypoxic, and there is a danger of suffocation. Therefore, most regulations stipulate that the maximum allowable concentration of SF6 gas in the workplace for operation and maintenance is 1000UL/L.
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