If Internal Discharge Has Occurred, The Operating Mechanism Of The Sf6 Circuit Breaker Must Be Replaced.

When internal discharge occurs, the insulation environment inside sf6 circuit breaker operating mechanism may have been altered, with increased local electric field strength and material fatigue leading to dielectric degradation. This degradation not only affects the pressure resistance of the gas medium, but may also damage the critical insulation support structure of the sf6 circuit breaker spring mechanism, increasing the risk of subsequent opening and closing operations. According to industry maintenance data, internal discharge often indicates deeper dielectric and mechanical problems that are difficult to thoroughly investigate during operation.