Rotary control device of a circuit breaker

A rotary control device for a circuit breaker including a front plate having an opening through which a crank pin extends, the crank pin being pivotal between first and second positions, said rotary control device comprising:

• a housing;
• a rotary handle mounted on said housing, said rotary handle being rotatable between first and second positions corresponding to the first and second positions of the crank pin of the circuit breaker, respectively;
• and
• coupling means for mechanically coupling the rotary handle to the crank pin wherein said housing is mounted on the front plate of the circuit breaker, said coupling means being provided in said housing and being connected to said rotary handle, said coupling means preventing mounting of the rotary control device on the circuit breaker when the rotary handle and the crank pin of the circuit breaker are not in the same position, and said coupling means comprising a driving head provided in the housing and being connected to the rotary handle such that said driving head is rotatable with said rotary handle, a pin extending from the driving head, a driving fork pivotally mounted on a fixed spindle in said housing, said pin engaging said driving fork to rotate the driving fork about said fixed spindle via rotation of the driving head, said driving fork having an opening therein for receiving the crank pin of the circuit breaker when the rotary control device is mounted on the front plate of the circuit breaker.