Thermal magnetic trip unit for molded case circuit breakers

Details Thermal magnetic trip unit for molded case circuit breakers Thermal magnetic trip unit for molded case circuit breakers

1986-09-15

1987-11-10

Goldberg, E. A.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

With armature structure

335 38, 335236, H01H 900

Patent

active

047060549

ABSTRACT:
A magnet piece and armature are arranged around a circuit breaker load strap having a bimetal strip attached thereto. The magnet piece is formed in a U-shaped configuration and is attached to the load strap. A corresponding U-shaped armature is pivotally mounted to the magnet piece in a partially overlapping relation. The U-shape armature presents a larger magnet pole surface to the magnet piece for enhanced magnetic interaction.

REFERENCES:
patent: 2776349 (1957-01-01), Thomas
patent: 3421123 (1969-01-01), Johnson et al.
patent: 4513268 (1985-04-01), Seymour et al.
U.S. Patent Application Ser. No. 817,213, filed Jan. 8, 1986, entitled "Interchangeable Mechanism for Molded Case Circuit Breaker", in the names of Ronald D. Ciarcia et al.

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