Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Tripping means
Patent
1999-08-18
2000-10-31
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Tripping means
335202, 200 435, H01H 900
Patent
active
061408972
ABSTRACT:
This concerns a molded case circuit breaker having separable main contacts and an operating mechanism structured to cause the separable main contacts to open and close. A trip unit is provided to actuate the operating mechanism in desirable circumstances. The circuit breaker housing has an auxiliary device compartment therein into which may be inserted a key lock arrangement. The trip unit has a plunger member which protrudes into the auxiliary device compartment and which, when actuated, causes the trip unit to actuate the operating mechanism to open the main contacts. When the key lock is actuated, a slideable member interacts with the plunger member in the trip unit and maintains the trip unit in a configuration that prevents the main contacts from engaging. Thus, as long as the lock member is maintained in the locked state, the circuit breaker may not be reset.
REFERENCES:
patent: 5113043 (1992-05-01), Morris
patent: 5463196 (1995-10-01), Darimont
patent: 5485134 (1996-01-01), Seymour et al.
patent: 5896225 (1999-11-01), Castonguay et al.
patent: 5910760 (1999-06-01), Malingowski
patent: 5936535 (1999-08-01), Rosen et al.
Miller David B.
Mueller Robert W.
Werling David M.
Donovan Lincoln
Eaton Corporation
Moran Martin J.
Nguyen Tuyen T.
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