(19)
(11) EP 2 074 643 A1

(12)

(43) Date of publication:
01.07.2009 Bulletin 2009/27

(21) Application number: 07811824.7

(22) Date of filing: 16.03.2007
(51) International Patent Classification (IPC): 
H01J 37/32(2006.01)
H01J 37/34(2006.01)
(86) International application number:
PCT/US2007/064248
(87) International publication number:
WO 2008/100318 (21.08.2008 Gazette 2008/34)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 17.03.2006 US 783346 P

(71) Applicant: Schneider Automation Inc.
North Andover, Massachusetts 01845 (US)

(72) Inventors:
  • KRAUSS, Alan, F.
    Raleigh, NC 27614 (US)
  • HARRIS, Raymond, W.
    Youngsville, NC 27596 (US)
  • BUDA, Paul, R.
    Raleigh, NC 27615 (US)

(74) Representative: Jackson, Robert Patrick et al
Frank B. Dehn & Co. St Bride's House 10 Salisbury Square
London EC4Y 8JD
London EC4Y 8JD (GB)

   


(54) CURRENT-BASED METHOD AND APPARATUS FOR DETECTING AND CLASSIFYING ARCS