Due To The Difference In The Pressure Gauge Standard Used, Although The Readings Are The Same, The Actual Pressure Is Different.

The pressure gauge reading used by the "former" is Pg＝P0－Pa; the pressure gauge reading used by the "latter" is equal to the absolute pressure Pg＝Po.
If both types of sf6 circuit breaker operating mechanism use the original pressure gauge, the reading is 0.5 MPa. If both are measured with the pressure gauge of the "former", the reading is.
Regarding the difference in low temperature resistance of sf6 circuit breaker spring mechanism
(1) When the ambient temperature of the "former" is around -35℃ and there is no air leakage, the density relay will automatically lock and open and close.
(2) For the "latter", the product manual states: it can work reliably at -55℃.