(19)

(11)

EP 2 732 453 A1

(12)

(43) Date of publication: 21.05.2014 Bulletin 2014/21 (21) Application number: 12718059.4 (22) Date of filing: 28.03.2012

(51) International Patent Classification (IPC):  H01F 5/02(2006.01) G01R 15/18(2006.01) (86) International application number: PCT/EP2012/001362 (87) International publication number: WO 2013/010599 (24.01.2013 Gazette 2013/04)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 16.07.2011 WO PCT/EP2011/003554 (71) Applicant: ABB Technology AG 8050 Zürich (CH)	(72) Inventors: HOZOI, Adrian 68219 Mannheim (DE) DISSELNKÖTTER, Rolf 69256 Mauer (DE) (74) Representative: Schmidt, Karl Michael  ABB AG GF-IP Oberhausener Strasse 33 40472 Ratingen 40472 Ratingen (DE)