Molded case circuit breaker thermal-magnetic trip unit

Details Molded case circuit breaker thermal-magnetic trip unit Molded case circuit breaker thermal-magnetic trip unit

1993-11-15

1995-01-10

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 42, H01H 7512

Patent

active

053811208

ABSTRACT:
A molded case circuit breaker having a thermal-magnetic trip unit is provided with a mechanical rating plug to allow a number of circuit breakers of different ampere ratings to be used within a common-sized enclosure. The rating plug interacts with a thermal-magnetic trip unit to set the circuit breaker ampere rating.

REFERENCES:
patent: 3264435 (1966-08-01), Klein et al.
patent: 4616199 (1986-10-01), Oster
patent: 4679016 (1987-07-01), Ciarcia et al.
patent: 4725800 (1988-02-01), Grunert et al.
patent: 4736174 (1988-04-01), Castonguay et al.
patent: 5250918 (1993-10-01), Edds et al.

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