Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With coupling means
Reexamination Certificate
2006-07-06
2009-06-09
Nguyen, Ha Tran T (Department: 2829)
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With coupling means
C324S126000, C324S252000
Reexamination Certificate
active
07545138
ABSTRACT:
A current measurement device using a Rogowski coil having a generally toroidally shaped core with flattened faces, a first winding in one direction, a second winding forming a return loop, and a temperature compensation and scaling network coupled to the coil. The core has concentric cavities and a rough surface to restrain movement of the coil winding. A Faraday shield is wrapped over the coil. One shield is “serpentine,” having staggered (offset) lateral extensions from a central region. An alternate shield has a generally circular central region with extensions in generally radial directions. The shield is formed of three layers comprising a non-ferromagnetic metal central layer surrounded by insulative layers. At an end tab of the shield, the metal layer is exposed for connection to a ground lug or other connector. An insulative housing envelops the coil and electrical network. An output wire terminates in an industrial connector. A resistive network may be implemented with the current measurement device. The resistive network may be balanced or unbalanced. The resistive network may be capable of signal attenuation of an output, capable of calibration of an output, or provide temperature compensation of an output.
REFERENCES:
patent: 1942575 (1934-01-01), Shapiro
patent: 2599550 (1952-06-01), Fraser
patent: 2845562 (1958-07-01), Bendell
patent: 3684955 (1972-08-01), Adams
patent: 3942029 (1976-03-01), Kawakami
patent: 4616176 (1986-10-01), Mercure et al.
patent: 4700131 (1987-10-01), Miller
patent: 4709205 (1987-11-01), Baurand et al.
patent: 4799005 (1989-01-01), Fernandes
patent: 4803425 (1989-02-01), Swanberg
patent: 4808959 (1989-02-01), Weissman
patent: 4810954 (1989-03-01), Fam
patent: 4831327 (1989-05-01), Chenier et al.
patent: 5012218 (1991-04-01), Haug et al.
patent: 5055816 (1991-10-01), Altman
patent: 5066904 (1991-11-01), Bullock
patent: 5223790 (1993-06-01), Baran et al.
patent: 5272460 (1993-12-01), Baumgartner et al.
patent: 5414400 (1995-05-01), Gris et al.
patent: 5442280 (1995-08-01), Baudart
patent: 5461299 (1995-10-01), Bruni
patent: 5461309 (1995-10-01), Baudart
patent: 5627475 (1997-05-01), Strosser
patent: 5831506 (1998-11-01), Crepel
patent: 5852395 (1998-12-01), Bosco et al.
patent: 5917316 (1999-06-01), Bosco et al.
patent: 5982265 (1999-11-01), Von Skarczinski et al.
patent: 6008711 (1999-12-01), Bolam
patent: 6094044 (2000-07-01), Kustera et al.
patent: 6137394 (2000-10-01), Holmes et al.
patent: 6184672 (2001-02-01), Berkcan
patent: 6215296 (2001-04-01), Arnoux et al.
patent: 6255565 (2001-07-01), Tamura
patent: 6288625 (2001-09-01), Kaczkowski
patent: 6300857 (2001-10-01), Herwig
patent: 6313623 (2001-11-01), Kojovic et al.
patent: 6351114 (2002-02-01), Iwasaki
patent: 6366076 (2002-04-01), Karrer et al.
patent: 6380727 (2002-04-01), Jitaru
patent: 6420952 (2002-07-01), Redilla
patent: 6437555 (2002-08-01), Ploch et al.
patent: 6566854 (2003-05-01), Hagmann
patent: 6614218 (2003-09-01), Ray
patent: 6624624 (2003-09-01), Karrer et al.
patent: 6680608 (2004-01-01), Kojovic
patent: 6822547 (2004-11-01), Saito et al.
patent: 6825650 (2004-11-01), McCormack et al.
patent: 6940702 (2005-09-01), Kojovic et al.
patent: 7009486 (2006-03-01), Goeke
patent: 7106162 (2006-09-01), Saito
patent: 7109838 (2006-09-01), Brennan
patent: 7227441 (2007-06-01), Skendzic
patent: 7227442 (2007-06-01), Skendzic
patent: 2003/0090356 (2003-05-01), Saito et al.
patent: 2004/0008461 (2004-01-01), Kojovic et al.
patent: 2004/0012901 (2004-01-01), Kojovic et al.
patent: 2004/0178875 (2004-09-01), Saito
patent: 2005/0052268 (2005-03-01), Pleskach et al.
patent: 2005/0156587 (2005-07-01), Yakymyshyn
patent: 2005/0156703 (2005-07-01), Twaalfhoven
patent: 2006/0174834 (2006-08-01), Long et al.
patent: 2006/0176140 (2006-08-01), Skendzic et al.
patent: 2006/0232263 (2006-10-01), Kovanko et al.
patent: 2006/0232265 (2006-10-01), Fritsch et al.
patent: 0573 350 (1993-12-01), None
patent: 0587491 (1994-03-01), None
patent: 0652 441 (1995-06-01), None
patent: 0808460 (1997-11-01), None
patent: 0889490 (1999-01-01), None
patent: 0889490 (1999-01-01), None
patent: 2001102230 (2001-04-01), None
patent: 2003173922 (2003-06-01), None
patent: 2004228296 (2004-08-01), None
patent: WO 00/72027 (2000-11-01), None
patent: PCT/US2007/015557 (2008-01-01), None
John D. Ramboz, Machinable Rogowski Coil, Design and Calibration, IEEE Transactions on Instrumentation and Measurement, Apr. 2, 1996, pp. 511-515, vol. 45, No. 2.
A Combined Current And Voltage Sensor For Metering And Protection In High Voltage Power Systems—W.Z. Fam, Fellow IEEE.
Kesler James R
Skendzic Veselin
Wilkerson Donovan E.
Benitez Joshua
Cummings, P.C. Eugene M.
Nguyen Ha Tran T
Schweitzer Engineering Laboratories Inc.
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