Patent ID: 6794963
Filing Date: 2004-09-21
Classification: H01H

Abstract:
A magnetic trip unit for actuating a latching mechanism to trip a circuit breaker upon an overcurrent condition, the magnetic trip unit including:an electrically conductive strap; a flux return component in electromagnetic communication with said electrically conductive strap; a tube disposed within said flux return component; a stator disposed at a first end of said tube connected to said flux return component, said stator having a stator surface at one end; and a plunger slidably extending from a second end of said tube, said plunger includes a plunger surface at one end facing said stator surface, said plunger further includes another end adapted to operably interact with the latching mechanism said plunger is biased to a predetermined position, wherein said plunger surface comprises a concave comical surface and said stator surface comprises a complementary convex conical surface to operably receive said plunger surface.