Low voltage circuit breaker has switching shaft with mounted torsion springs for providing opening force

摘要

The low voltage circuit breaker has a movable contact carrier [12] that in the on condition is moved to latch into the housing [10] and so engages the power contact. The carrier has a switching shaft [14] that turns about an axis [30] and loads one or two torsion springs. When the circuit breaker operates the torsion spring releases.