Maintenance Exposure Can Lead To Secondary Moisture In The Sf6 Circuit Breaker Operating Mechanism.

In power systems, the sf6 circuit breaker operating mechanism is a crucial device for maintaining the stable operation of high-voltage equipment, its internal structure tightly integrated with the gas insulation system. During maintenance within the industry, if the equipment casing needs to be opened or the internal seal interrupted, the secondary circuits of the operating mechanism will be exposed to the external environment and may absorb moisture from the air. Such moisture infiltration is not uncommon, especially in high-humidity maintenance environments.

After secondary moisture absorption, the insulation strength of the electrical connection points and control circuits of the sf6 circuit breaker spring mechanism may be weakened. Long-term accumulation can lead to the formation of a thin condensation film on the contact surface, increasing the risk of partial discharge and malfunction.