Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2007-11-20
2007-11-20
Tsai, Carol S. W. (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C702S059000, C702S058000, C702S066000, C324S521000, C324S522000, C361S078000, C361S080000, C361S042000, C361S085000
Reexamination Certificate
active
11432904
ABSTRACT:
The present invention is directed to a method and apparatus for improving operational reliability during a loss of a phase voltage (LOV) in a multi-phase power system, wherein a voltage representative of the LOV phase is calculated. The representative voltage is used for computing a reference polarizing voltage suitable for a protection unit.
REFERENCES:
patent: 3825815 (1974-07-01), Gyugyi et al.
patent: 4063300 (1977-12-01), Paddison et al.
patent: 4314199 (1982-02-01), Yamaura et al.
patent: 4420788 (1983-12-01), Wilkinson et al.
patent: 4591992 (1986-05-01), Yamaura
patent: 4719580 (1988-01-01), Nimmersjo
patent: 4823226 (1989-04-01), Reed et al.
patent: 5694281 (1997-12-01), Roberts et al.
patent: 5883578 (1999-03-01), Roberts et al.
patent: 6466030 (2002-10-01), Hu et al.
patent: 6914762 (2005-07-01), Bo
patent: 2002/0121903 (2002-09-01), Hu et al.
patent: 2002/0149375 (2002-10-01), Hu et al.
patent: 2003/0142450 (2003-07-01), Bo
patent: 2004/0167729 (2004-08-01), Saha et al.
patent: 2006/0142964 (2006-06-01), Saha et al.
ABB Technology AG
Prewitt Michael C.
Rickin Michael M.
Tsai Carol S. W.
LandOfFree
Method and apparatus for improving operational reliability... 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 improving operational reliability..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for improving operational reliability... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3851387