Plug-in circuit breaker discharge and disengagement energy storage control device used during extraction of breaker

A plug-in switchgear apparatus, comprising:

• a fixed frame, a circuit breaker movable in the fixed frame between a plugged-out position and a plugged-in position, the circuit breaker comprising at least one pair of contacts, at least one of which is movable and can take with respect to the other a closed position and an open position, a loading and closing mechanism comprising a closing spring movable from a loaded state to a released state, the closing spring being associated to the movable contact in such a way that relaxation of the closing spring drives the movable contact to the movable contact's closed position;
• a closing latch for latching the closing spring in the closing spring's loaded state;
• an opening mechanism comprising an opening spring movable from a loaded state to a released state and from the released state to the loaded state, the opening spring being associated to the movable contact in such a way that relaxation of the opening spring drives the movable contact to an open position and that movement of the movable contact to the movable contact's closed position results in loading of the opening spring, and an opening latch for latching the opening spring in the opening spring's loaded state;
• an opening latch control means for driving the opening latch to the opening latch's unlatched position when the circuit breaker passes via a first intermediate opening position between the plugged-out position and the extracted position, in the extraction direction;
• a closing latch control means for driving the closing latch to the closing latch's unlatched position when the circuit breaker passes via an intermediate closing position between the first open position and the extracted position, in the extraction direction, wherein the opening latch is designed to revert to the opening latch's latching position before the circuit breaker passes via the circuit breaker's intermediate closing position, in the extraction direction, and said opening latch control means is moreover designed to detect the fact that the circuit breaker passes via a second intermediate opening position between the intermediate closing position and the extracted position, in the extraction direction, and in this case to drive the opening latch to the opening latch's unlatched position.