Patent ID: 6175288
Filing Date: 2001-01-16
Classification: H01H

Abstract:
A magnetic trip unit for a circuit breaker load strap comprising:a U-shaped magnet having a first upstanding sidearm, a second upstanding sidearm, and a slot extending through said first upstanding sidearm;a generally platelike armature having a main body portion, the main body portion having a first end and a second end, the armature further having a pivot arm extending from the first end of the main body portion and an actuator arm extending from the second end of the main body portion, said pivot arm being partially captured within said slot in the U-shaped magnet; anda trip slide plate having a main section, the main section having a top end, a bottom end opposite the top end, a first side, and a second side opposite the first side, the trip slide plate further having a trip tab extending from the top end of the main section and a top arm and a bottom arm extending from the first side of the main section, said top arm positioned under said actuator arm, said actuator arm becoming attracted to said top arm when said magnet and said armature encompass a part of said load strap upon transfer of current of a predetermined value through said load strap.