Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Reexamination Certificate
2005-04-18
2008-08-26
Jackson, Stephen W (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
C361S018000, C361S094000, C361S115000
Reexamination Certificate
active
07417840
ABSTRACT:
An electronic self-supplied protection device for automatic circuit-breakers that includes: a supply device that draws energy from the stretch of electrical network protected by said circuit-breaker; a control device with at least two levels of operation, where the first of the at least two levels of operation being associated to the function of protection from instantaneous short-circuit SCinst. In addition, second and possible further levels of operation of the self-supplied protection device are associated with further functions of said protection device; a selective interface device including means for regulating the supply, which, in a first step, immediately following upon closing of the circuit by the circuit-breaker, supply the first level of operation, and, after a controlled period of time, supply also the second and possible further levels of operation of said control device.
REFERENCES:
patent: 3465206 (1969-09-01), Lincoln et al.
patent: 6167329 (2000-12-01), Engel et al.
patent: 6295190 (2001-09-01), Rinaldi et al.
patent: 6731487 (2004-05-01), Fletcher et al.
Stucchi Marco
Viaro Francesco
ABB S.p.A.
Connolly Bove & Lodge & Hutz LLP
Jackson Stephen W
Willoughby Terrence R
Wyche Myron Keith
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