| 摘要 |
A rapid-action, current-limiting automatic switch with a magnetic tripping device with an iron circuit of small geometric dimensions and few ampere turns of the exciter coil required to make the armature acting on the latching mechanism respond, comprises an additional armature which acts on a movable contact member and is arranged in a magnetic circuit which is in common with the first armature. The tripping device contains a magnetic core, an exciter coil and a magnetic shunt across the air gap of the additional armature. |
