The Operating Mechanism Of An Sf6 Circuit Breaker Must Be Replaced During Its First Major Overhaul After A Long Period Of Operation.

During the initial overhaul, sf6 circuit breaker operating mechanism typically requires complete disassembly to inspect its internal condition. The internal springs, connecting rods, and seals exposed during disassembly may have inevitably degraded, and this degradation is difficult to restore to optimal condition through simple repairs.

After prolonged service, the interfacial sealing performance between sf6 circuit breaker spring mechanism and the SF6 gas system may have changed. The adsorbent and gas desiccant inside the operating mechanism have adsorbed moisture and impurities during their service life, resulting in a significant decline in their performance. If the adsorbent and related internal components are not replaced after the initial overhaul, reassembly of the original chamber will likely fail to achieve the desired internal environmental requirements.