(57) Operating device for circuit breakers comprising a closing spring and an opening
spring (2). After each completed closing operation, a motor (16) tensions the closing
spring again which, while closing the circuit breaker, tensions the opening spring.
The closing spring is kept tensioned by a closing latch (6). The circuit breaker (20)
is kept closed and the opening spring (2) is kept tensioned by a trip latch (7). The
operating device is composed around only one shaft (3), which provides a simple design
with relatively few components. On the shaft (3) a driver lever (4) is fixed. Upon
closing of the circuit breaker, the driver lever (4) is connected, by a latching engagement
(43,53), to an operating lever (5), connected to the movable contact of the circuit
breaker, and pulls said lever along. The operating lever (5) is eccentrically mounted
in relation to the shaft (3) in such a way that the levers (4,5) after a certain rotating
movement, for example 90°, are disengaged from each other.
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