Method and apparatus for shielding and armature from a...

Details Method and apparatus for shielding and armature from a... Method and apparatus for shielding and armature from a...

2005-12-06

2005-12-06

Donovan, Lincoln (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

C335S035000, C335S023000, C335S176000

Reexamination Certificate

active

06972649

ABSTRACT:
A trip unit for a circuit breaker having a current carrying conductor that electrically communicates with a cable or a bus bar. The trip unit includes a current carrying strap, a magnet core, an armature and a magnetic barrier. The current carrying strap is adapted to be in electrical communication with the current carrying conductor. The magnet core is disposed at the current carrying strap. The armature is pivotally disposed in magnetic communication with the magnet core. The magnetic barrier is disposed to shield the armature from a magnetic flux generated in the current carrying conductor.

REFERENCES:
patent: 4725800 (1988-02-01), Grunert et al.
patent: 5005104 (1991-04-01), Grunert et al.
patent: 5894259 (1999-04-01), Kolberg et al.
patent: 6750743 (2004-06-01), Subramanian
patent: 2001/0000955 (2001-05-01), Leone et al.

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