| 摘要 |
An electro-magnetically operable device 12 for a circuit breaker 10 comprises a coil 13 that defines a cavity. A first core 14 and a second core 16 are located within the cavity, adjacent one another. The first core 14 is housed in a sealed canister 18 which is filled with a damping liquid. The core 14 is displaceable within the canister 18 in a damped manner. The second core 16 is also displaceable within the cavity and movement thereof is guided by an open tube 20. The first core 14 and the second core 16 are urged away from a pole piece 30 of the device 12 via helical springs 32 and 34, respectively. <IMAGE> |
