Automatic circuit breakers

摘要

Circuit breaker, comprising:Current paths, in each case one for each phase, each comprising the series circuit of a first switching contact (5) and a second switching contact (6),a switch mechanism (7), through which in response to a setting operation, an energy stored in it for opening the first switching contact (5) is releasable,a the second switching contact (6), as a function of a control signal opening or closing, electromagnet (8),an excess-current release device (4; 13) for detecting an overcurrent occurs in the conductive paths, and for providing a trigger signal at the switching mechanism and the electromagnet, andan insulating container (9) for receiving the current paths with the first switching contacts (5) and the second switching contacts (6), the switching mechanism (7), the electromagnet (8) and of the excess-current release device (4; 13), wherein the circuit breaker insulating holder (24, 25) for holding the movable contact pieces (21) of the first switching contacts (5) and the movable contact pieces (23) of the second switching contacts (6), wherein the holder about a common axis of rotation is rotatably mounted on..