Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2007-02-06
2007-02-06
Hoff, Marc S. (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C324S547000
Reexamination Certificate
active
10803411
ABSTRACT:
An apparatus for sensing the current in a power line of a power system and systems incorporating the apparatus are disclosed. The apparatus may comprise an enclosure providing a window operable to permit the passage of the power line therethrough. The apparatus may further comprise an active current transformer set within the enclosure and operative to produce a scaled version of the current. The apparatus may further comprise an amplifier coupled with the active current transformer and operative to reduce the phase shift and ratio error between the current and the scaled version of the current. The apparatus may further comprise a powering current transformer set within the enclosure and operative to receive power from the power line on a primary winding and deliver power on a secondary winding. The apparatus may further comprise power supply circuitry set within the enclosure, the power supply circuitry powered through the secondary winding from the powering current transformer and operative to supply power to the amplifier. The apparatus may further comprise at least one of secondary leads and secondary terminals extending from the enclosure, coupled with the active current transformer and operative to deliver the scaled version of the current outside of the enclosure.
REFERENCES:
patent: 3153758 (1964-10-01), Kusters et al.
patent: 3534247 (1970-10-01), Miljanic
patent: 4255704 (1981-03-01), Milkovic
patent: 4422039 (1983-12-01), Davis
patent: 4629974 (1986-12-01), Friedl
patent: 4709339 (1987-11-01), Fernandes
patent: 4841236 (1989-06-01), Miljanic et al.
patent: 4884038 (1989-11-01), Miljanic
patent: 4967145 (1990-10-01), Davies
patent: 5066904 (1991-11-01), Bullock
patent: 5276394 (1994-01-01), Mayfield
patent: 5307008 (1994-04-01), So
patent: 5563506 (1996-10-01), Fielden et al.
patent: 5644514 (1997-07-01), Abo et al.
patent: 5650936 (1997-07-01), Loucks et al.
patent: 5673252 (1997-09-01), Holowick et al.
patent: 5684466 (1997-11-01), Keating et al.
patent: 5809045 (1998-09-01), Adamiak et al.
patent: 5959818 (1999-09-01), Blakely
patent: 5995911 (1999-11-01), Hart
patent: 6005759 (1999-12-01), Hart et al.
patent: 6018700 (2000-01-01), Edel
patent: 6046582 (2000-04-01), Sanelli et al.
patent: 6278357 (2001-08-01), Croushore et al.
patent: 6292717 (2001-09-01), Alexander et al.
patent: 6373834 (2002-04-01), Lundh et al.
patent: 6385022 (2002-05-01), Kulidjian et al.
patent: 6397155 (2002-05-01), Przydatek et al.
patent: 6417661 (2002-07-01), Berkcan et al.
patent: 6433981 (2002-08-01), Fletcher et al.
patent: 6470283 (2002-10-01), Edel
patent: 6493644 (2002-12-01), Jonker et al.
patent: 6571182 (2003-05-01), Adamiak et al.
patent: 6590891 (2003-07-01), Jacquet et al.
patent: 2001/0010032 (2001-07-01), Ehlers et al.
patent: 2002/0027504 (2002-03-01), Davis et al.
patent: 2002/0032535 (2002-03-01), Alexander et al.
patent: 2002/0091784 (2002-07-01), Baker et al.
patent: 2002/0120723 (2002-08-01), Forth et al.
patent: 2003/0067725 (2003-04-01), Horvath et al.
patent: 2003/0098679 (2003-05-01), Odaohhara
patent: 0 395 495 (1990-10-01), None
patent: 0 957 607 (1999-11-01), None
patent: WO 01/59965 (2001-08-01), None
W.J.M. Moore & P.M. Miljanic, “The Current Comparator,”IEE Electrical Measurement Series 4, 1988, London.
The Institute of Electrical and Electronics Engineers, Inc., “IEEE Standard Requirements for Instrument Transformers,”IEEE Std C57. 13-1993, New York.
International Search Report, PCT/CA2004/000705, dated Aug. 20, 2004.
PCT International Search Report for Application No. PCT/US04/23006.
Forth J. Bradford
Gunn Colin N.
Hancock Martin A.
Kingham Brian R.
Lightbody Simon H.
Baran Mary Catherine
Brinks Hofer Gilson & Lione
Hoff Marc S.
Power Measurement Ltd.
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