Thermal-magnetic trip unit with low current response

Details Thermal-magnetic trip unit with low current response Thermal-magnetic trip unit with low current response

1992-07-13

1993-07-06

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 23, H01H 7512

Patent

active

052258009

ABSTRACT:
A molded case thermal-magnetic circuit breaker having improved low current magnetic trip response pivotally arranges the magnet within the circuit breaker thermal-magnetic trip system for controllably moving toward the latching armature assembly. The movement of the magnet decreases the magnetic separation distance between the magnet and the latching armature to optimize the magnetic trip forces and thereby enhance low current magnetic trip response.

REFERENCES:
patent: 3950715 (1976-04-01), Bagalini et al.
patent: 4156219 (1979-05-01), Coleman
patent: 4386329 (1983-05-01), Norden
patent: 4481491 (1984-11-01), Heft et al.

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