Control of spring(s) type for a high- or medium-voltage breaker furnished with a pawled free wheel coupling device

A spring type controller for a high-voltage or medium-voltage switch, the controller comprising:

• at least one spring;
• a first toothed wheel adapted to be driven in rotation with a driving power;
• a shaft adapted to drive a movable contact of the switch in rotation during an operation of the switch;
• an arm secured to the shaft and connected to the at least one spring;
• and a free-wheel coupling device coupling the first toothed wheel with the shaft in order to transmit the driving power to the at least one spring so as to load the at least one spring, and uncoupling them in order to transmit torque from the loaded at least one spring to the movable contact but not to the driving power;
• the free-wheel coupling device comprising:
• a second toothed wheel having an outer periphery and an inner periphery, the entire outer periphery being provided with teeth permanently meshing with the first toothed wheel and the entire inner periphery being provided with teeth;
• a release element arranged proximate to the outer and inner peripheries of the second toothed wheel;
• and
• at least one pawl pivotally mounted on the arm and adapted to be in the following respective positions:
• meshing with the inner teeth of the second toothed wheel to load the at least one spring until the at least one spring reaches a compression top dead-center by rotation, in a given direction of rotation, of the second toothed wheel and of the arm thus meshing therewith;
• bearing mutually against the release element once the at least one spring reaches the compression top dead-center, thereby disengaging from the inner teeth by pivoting on the arm in a direction opposite to a direction of rotation of the second toothed wheel, while blocking the arm;
• and
• spaced apart from the release lever by action thereon, in order to unblock the arm and allow it to be driven in rotation by the release force from the at least one spring and in the same given direction of rotation, while the second toothed wheel remains stationary.