Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural inputs
Reexamination Certificate
2006-07-11
2006-07-11
Tang, Minh N. (Department: 2829)
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural inputs
C324S127000, C324S11700H
Reexamination Certificate
active
07075288
ABSTRACT:
A voltage acquisition circuit for sensing input voltage signals in each phase of an electrical service includes a non-active current transformer configuration that is operable over a wide input voltage range. The current transformer configuration includes primary and secondary windings, an input resistor and a burden resistor across which an output voltage is defined. The input resistor may be relatively large, such as on the order of about one MΩ and the transformer core may have a nanocrystalline core characterized by predictable magnetic properties versus varied transformer flux levels. This operational predictability facilitates phase compensation via digital filtering or otherwise for any phase shift induced between input and output voltages of the current transformer.
REFERENCES:
patent: 4939451 (1990-07-01), Baran et al.
patent: 5369355 (1994-11-01), Roe
patent: 6154037 (2000-11-01), Ashley et al.
patent: 6674278 (2004-01-01), Uesugi
patent: 6754616 (2004-06-01), Sen et al.
patent: 2004/0090220 (2004-05-01), De Vries et al.
Pages 273-362 ofHandbook for Electricity Metering, Ninth Edition, copyright 1992 by Edition Electric Institute no month.
PCT International Search Report of corresponding international application, PCT/US04/21088, dated May 2, 2005.
Lakich Daniel M.
Martin Brent T.
Moore Michael E.
Dority & Manning P.A.
Itron, Inc.
Tang Minh N.
LandOfFree
System and method for acquiring voltages and measuring... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for acquiring voltages and measuring..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for acquiring voltages and measuring... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3537832