Why Can't Sf6 Circuit Breaker Operating Mechanisms Be Replaced Arbitrarily?

In SF6 circuit breakers, the arc-extinguishing chamber and the sf6 circuit breaker operating mechanism unit are connected via an insulating rod and a drive linkage. The interrupting unit and the gas-insulated unit have strict designs regarding gas pressure, stroke, and operating time. If the sf6 circuit breaker spring mechanism unit comes from different manufacturers or models, its spring preload, closing/breaking speed, and mechanical stroke may differ from the arc-extinguishing unit's design parameters. This will affect the SF6 arc-extinguishing performance, causing reopening or failure to interrupt current normally.