(19)
(11) EP 1 257 832 A1

(12)

(43) Date of publication:
20.11.2002 Bulletin 2002/47

(21) Application number: 00903407.5

(22) Date of filing: 26.01.2000
(51) International Patent Classification (IPC)7G01R 11/32
(86) International application number:
PCT/US0001/663
(87) International publication number:
WO 0105/5733 (02.08.2001 Gazette 2001/31)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 26.01.2000 US 

(71) Applicant: ABB Automation Inc.
Raleigh, NC 27610 (US)

(72) Inventors:
  • BEROSET, Edward, John
    Chapel Hill, NC 27516 (US)
  • BLASCO, Richard, William
    Auburn, CA 95602 (US)
  • HEMMINGER, Rodney
    Raleigh,North Carolina 27612 (US)
  • HEUEL, Peter, W.
    Raleigh, NC 27610 (US)
  • HOLDSCLAW, Scott, Turner
    Raleigh, NC 27616 (US)
  • LOBASTOV, Konstantin, Zh.
    Raleigh, NC 27605 (US)
  • LEIRA, Stig
    1353 Baerums Veerk (NO)
  • SUTA, Valentin
    Raleigh NC 27613 (US)

(74) Representative: W.P. THOMPSON & CO. 
Eastcheap HouseCentral Approach
Letchworth,Hertfordshire SG6 3DS
Letchworth,Hertfordshire SG6 3DS (GB)

   


(54) SYSTEM AND METHOD FOR DIGITALLY COMPENSATING FREQUENCY AND TEMPERATURE INDUCED ERRORS IN AMPLITUDE AND PHASE SHIFT IN CURRENT SENSING OF ELECTRONIC ENERGY METERS