Miniature circuit breaker with shunt trip device

Details Miniature circuit breaker with shunt trip device Miniature circuit breaker with shunt trip device

1997-12-08

1999-06-08

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 38, H01H 7510

Patent

active

059107588

ABSTRACT:
A circuit breaker system with a shunt trip device is taught in which the shunt trip device occupies a miniature circuit breaker case and utilizes features of the miniature circuit breaker case except that it is provided with a coil and two-piece armature which initiates the shunt tripping operation when properly energized to thus open the separable main contacts of side-by-side mounted circuit breakers having the same intermediate axial member. A back plate is provided for the two-piece joined armature member in the central region of the toroid, solenoid or coil to assist the snug fit of the two-piece core within the central opening of the bobbin of the solenoid and to provide a low reluctance bypass for the magnetic flux crossing the gap formed by the end abutments of the two-pieces of the magnetic core.

REFERENCES:
patent: 3179767 (1965-04-01), Middendorf
patent: 3258562 (1966-06-01), Hurtle
patent: 3278708 (1966-10-01), Casey et al.
patent: 3421123 (1969-01-01), Johnson et al.
patent: 3849747 (1974-11-01), Mrenna et al.
patent: 3959754 (1976-05-01), Mrenna
patent: 5546060 (1996-08-01), Mrenna

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