(19)

(11)

EP 2 441 079 A1

(12)

(43) Date of publication: 18.04.2012 Bulletin 2012/16 (21) Application number: 10724819.7 (22) Date of filing: 08.06.2010

(51) International Patent Classification (IPC):  H01H 9/00(2006.01) (86) International application number: PCT/EP2010/058011 (87) International publication number: WO 2010/142680 (16.12.2010 Gazette 2010/50)

(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 SE SI SK SM TR (30) Priority: 10.06.2009 EP 09162444 (71) Applicant: ABB Research Ltd. 8050 Zürich (CH)	(72) Inventor: JONSSON, Lars S-723 51 Västerås (SE)