This utility model relates to the field of contact assemblies for frame circuit breakers, and discloses a flexible connection protection structure for frame circuit breakers, including a moving contact
assembly and a stationary contact
assembly. The two are used together to perform their functions. When the moving contact
assembly opens, the arc-blocking plate always maintains an appropriate distance from the arc-blocking cover of the stationary contact, so that the
impact of the
electric arc on the flexible connection structure is minimized, thereby ensuring the normal conduct of subsequent
circuit breaker tests. During the opening process, the arc-blocking plate and the arc-blocking cover of the stationary contact also continue to correspond and are not completely separated. The continuous correspondence and arc blocking time is sufficient to ensure that the flexible connection structure is not burned. The rib plate array is set inside the arc-blocking plate, so that the arc-blocking plate can remain stable and not collapse even under
high air pressure.