Patent ID: 6218920
Filing Date: 2001-04-17
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:a first electrically conductive strap;a first magnet yoke disposed proximate to said first electrically conductive strap;a first armature pivotally disposed proximate to said fist magnet yoke, said first armature and said first magnet yoke being separated by a first gap;a trip shaft extending along an axis and configured to rotate about said axis and interact with the latching mechanism, said trip shaft having a first cam extending therefrom, said first cam being arranged proximate to said first armature; andan adjusting bar extending substantially parallel to said axis, said adjusting bar configured to rotate about said axis independently of said trip shaft, said adjusting bar including a first adjusting arm extending therefrom, said first adjusting arm contacting said first armature for adjusting said first gap between said first magnet yoke and said first armature.