Abstract: A circuit breaker arrangement is disclosed. It comprises a cart (1) on which slides a circuit breaker. A lead screw (14) drives the circuit breaker along a linear path by moving a drive block (15), an upper protuberance (211) of which engages the circuit breaker. The arrangement provides for an automatic uncoupling of the circuit breaker at an end position of the drive block (15), where a handle inserted into a hole (24) may turn an end of the lead screw and rock the drive block with a meshing mechanism (43) so that the protuberance (211) escapes the circuit breaker. It is therefore very easy to mount, dismount or replace the circuit breaker. A similar advantage based on unlatching an interlock may be obtained for dismounting the electrical motor (12) that normally drives the lead screw (14). The invention can well take place in the medium voltage industry.

Abstract: A circuit breaker arrangement is disclosed. It comprises a cart (1) on which slides a circuit breaker. A lead screw (14) drives the circuit breaker along a linear path by moving a drive block (15), an upper protuberance (211) of which engages the circuit breaker. The arrangement provides for an automatic uncoupling of the circuit breaker at an end position of the drive block (15), where a handle inserted into a hole (24) may turn an end of the lead screw and rock the drive block with a meshing mechanism (43) so that the protuberance (211) escapes the circuit breaker. It is therefore very easy to mount, dismount or replace the circuit breaker. A similar advantage based on unlatching an interlock may be obtained for dismounting the electrical motor (12) that normally drives the lead screw (14). The invention can well take place in the medium voltage industry.