Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Reexamination Certificate
2006-04-11
2006-04-11
Donovan, Lincoln (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
C361S115000, C361S093900
Reexamination Certificate
active
07026894
ABSTRACT:
An apparatus for interrupting an electrical short circuit current in an electrical distribution system having a plurality of phases is disclosed. The apparatus includes a housing, a plurality of separable conduction paths, an operating mechanism in operable communication with the plurality of conduction paths, an electronic trip unit in signal communication with each of the plurality of conduction paths and in operable communication with the operating mechanism, and an electromagnetic trip unit in signal communication with each of the plurality of conduction paths and in operable communication with the operating mechanism. The electromagnetic trip unit is configured to be operably responsive to a first half-cycle waveform of the short circuit current prior to the electronic trip unit being operably responsive to a second multi-cycle waveform of the short circuit current.
REFERENCES:
patent: 4884048 (1989-11-01), Castonguay et al.
patent: 6054912 (2000-04-01), Kaneko et al.
patent: 6480082 (2002-11-01), Aihara et al.
Mody Hemant
Richter Timothy Gerard
Robarge Dean A.
Ronzello Michael
Tobin Michael
Cantor & Colburn LLP
Donovan Lincoln
General Electric Company
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