| 摘要 |
<p>An electromagnetic circuit breaker (1) comprising fixed contacts (11), moveable contact bridges (13) arranged to electrically connect the fixed contacts(11), a magnetic core (3), a coil (4) electrically connected to the fixed contacts (11) and arranged to magnetise the magnetic core (3), an actuator (5) arranged to actuate the moveable contact bridges (13) between a closed circuit position in which the moveable contact bridges (13) are in mechanical connection with the fixed contacts (11) and the actuator (5) is in a first actuator position and an open circuit end position in which the actuator (5) is in a second actuator position, a magnetic member (7) arranged to move to the magnetic core (3) when the coil (4) is fed with a current greater than a threshold value, wherein the magnetic member (7) is arranged to initiate an initial motion of the actuator (5) when the magnetic member (7) moves towards the magnetic core (3) to break the mechanical connection between the moveable contact bridges (13) and the fixed contacts (11).The electromagnetic circuit breaker (1) further comprises a resilient arrangement (17), an energy accumulating member (19), and a bi-stable linkage (9) which in a first equilibrium state is arranged to maintain the resilient arrangement in an energised state, forcing the actuator (5) into the first actuator position, wherein bi-stable linkage (9) is arranged to be released from the first equilibrium state by the initial motion of the actuator (5), wherein the energy accumulating member (19) is arranged to provide a continued motion of the actuator (5) to the second actuator position.</p> |
