Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of ground fault indication
Reexamination Certificate
2006-12-26
2006-12-26
Deb, Anjan (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of ground fault indication
C324S510000, C363S095000
Reexamination Certificate
active
07154277
ABSTRACT:
A system for use in ac to ac or dc to ac power conversion equipment to detect faults in an inverter when the inverter is in a high impedance mode. The system detects ground faults or cross wiring conditions by converting the inverter outputs to digital signals and evaluating the frequencies of the resulting signals. The system keeps the inverter in the high impedance mode until after it has been determined that neither of the described abnormal statuses exist. The system tests for both of the abnormal statuses on power up and thereafter tests only for a ground fault whenever the inverter switches are disabled.
REFERENCES:
patent: 3761809 (1973-09-01), Lockitt et al.
patent: 3808529 (1974-04-01), Rowlands
patent: 4475150 (1984-10-01), D'Atre et al.
patent: 5214575 (1993-05-01), Sugishima et al.
patent: 5483167 (1996-01-01), Mikami
patent: 6330140 (2001-12-01), Wilson-Jones et al.
patent: 6381110 (2002-04-01), Nagashima et al.
patent: 2003/0067303 (2003-04-01), Huber et al.
Karraker Douglas
Tyczkowski Dennis
Vallinmaki Alpo K.
ABB Inc.
Deb Anjan
Katterle Paul R.
Rickin Michael M.
LandOfFree
Method and apparatus for detecting faults in AC to AC, or DC... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for detecting faults in AC to AC, or DC..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting faults in AC to AC, or DC... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3718125