Electricity: electrical systems and devices – Safety and protection of systems and devices – Ground fault protection
Reexamination Certificate
2011-06-21
2011-06-21
Nguyen, Danny (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Ground fault protection
C361S042000
Reexamination Certificate
active
07965478
ABSTRACT:
A system and method for detecting a fault condition by a relay is provided. The system includes means for detecting phase currents through three electrical phases, means for detecting a ground fault current, a processor configured to perform a current-based function based upon at least one of the phase currents and a filter. The processor is configured to perform current-based functions based on whether the filter is enabled or disabled.
REFERENCES:
patent: 6005393 (1999-12-01), Baumgartl
patent: 6167329 (2000-12-01), Engel et al.
patent: 6459557 (2002-10-01), Haensgen et al.
Haensgen Steven T.
Hurley Ricky A.
Jansen Ronald N.
Martin William H.
Fletcher Yoder LLP
Miller John M.
Nguyen Danny
Rockwell Automation Technologies Inc.
Walbrun William R.
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