Matters needing attention when repairing the SF6 circuit breaker operating mechanism and filling it with SF6 gas

For the "latter", when inspecting sf6 circuit breaker operating mechanism and filling SF6 gas to perform "pressure-temperature" conversion and correcting the pressure, if the pressure gauge provided by the factory is used at the sf6 circuit breaker spring mechanism air inlet end, Formula 2 should be used for calculation; if a domestic pressure gauge is used at the air inlet end, Formula 1 should be used for calculation, and P20=0.402MPa should be taken at this time.