| 摘要 |
Operating device for circuit breakers comprising an opening spring (1) and a closing spring(2), which preferably are both of the spirally wound flat rod or ribbon type and exert a torsional moment on each one of two shafts (3, 4) which are aligned. The shaft (3) of the opening spring (1) is connected to the circuit breaker via a lever (31). The closing spring (2) is mounted in a rotatable cylinder (21) and can be tensioned by rotating the cylinder (21) by means of a motor (22). The shaft (4) of the closing spring (2) is kept locked by a closing latch (8) which hooks up one of the arms of a star wheel (6). Closing of the circuit breaker and simultaneous tensioning of the opening spring (1) are performed by releasing the closing latch (8), whereby another one of the arms of the star wheel (6) engages a carrier latch (53) on the shaft (3) of the opening spring (1) and rotates this through an angle corresponding to one step on the star wheel (6). The carrier latch (53) is thereafter disengaged, whereby the shaft (3) of the opening spring (1) is hooked up on an opening latch (7) and the circuit breaker is ready for an opening operation. Immediately after the disengagement, the next arm of the star wheel (6) is hooked up on the closing latch (8), and the motor (22) is able to tension the closing spring (2) again. |
