Molded case circuit breaker with contact bridge slowed down at the end of repulsion travel

A molded case low voltage circuit breaker comprising:

• a rotary contact bridge having a rotation axis;
• a pair of stationary contacts cooperating with said contact bridge each stationary contact of said pair of contacts having a current input conductor connected thereto, each conductor being arranged to generate electrodynamic forces repelling the contact bridge to a repelled open position in response to a short-circuit current;
• a rotary bar having a transverse orifice housing with clearance said contact bridge which protrudes out from opposite sides of the bar;
• a pair of rods mounted in notches in said bar;
• at least one pair of tension springs fitted between the bar and the contact bridge to provide a contact pressure of the contact bridge on the stationary contacts in a closed position of the circuit breaker, wherein at least one pair of tension springs allows rotation of the contact bridge due to said electrodynamic forces to the repelled open position, said springs being arranged symmetrically on each side of the rotation axis of the contact bridge, each of said springs having one end anchored on the contact bridge and an opposite end anchored on one of said rods;
• and said contact bridge has a pair of cams arranged symmetrically with respect to said rotation axis, each cam arranged to cooperate with one of the pair of rods to slow down the movement of the contact bridge as said contact bridge approaches said repelled open position.