Thermal-magnetic trip unit

Details Thermal-magnetic trip unit Thermal-magnetic trip unit

1992-02-25

1993-01-26

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335167, 335 37, 335 23, H01H 7512

Patent

active

051825325

ABSTRACT:
A molded case thermal-magnetic circuit breaker having improved low current magnetic trip response interfaces an intermediate armature between the circuit breaker latching element and the magnet assembly within the circuit breaker thermal-magnetic trip system. The intermediate armature optimizes the magnetic trip forces applied to both the intermediate armature and the latching element to enhance low current magnetic trip response.

REFERENCES:
patent: 3156796 (1964-11-01), Vogelsberg
patent: 3178535 (1965-04-01), Gelzheiser et al.
patent: 3179767 (1965-04-01), Middendorf
patent: 3278707 (1966-10-01), Klein
patent: 3278708 (1966-10-01), Casey et al.
patent: 3292118 (1966-12-01), Pastene
patent: 3555468 (1971-01-01), Myers
patent: 3566318 (1971-02-01), Gelzheiser et al.
patent: 3950715 (1976-04-01), Bagauni et al.
patent: 4081852 (1978-03-01), Coley et al.
patent: 4513268 (1985-04-01), Seymour et al.
patent: 4951015 (1990-08-01), Shea et al.

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