(19)

(11)

EP 2 591 483 A1

(12)

(43) Date of publication: 15.05.2013 Bulletin 2013/20 (21) Application number: 10729875.4 (22) Date of filing: 06.07.2010

(51) International Patent Classification (IPC):  H01H 9/00(2006.01) H01H 33/66(2006.01) (86) International application number: PCT/EP2010/059676 (87) International publication number: WO 2012/003863 (12.01.2012 Gazette 2012/02)

(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 (71) Applicant: ABB Research Ltd. 8050 Zürich (CH)	(72) Inventors: NILSSON, Petter S-771 43 Ludvika (SE) JONSSON, Lars S-723 51 Västerås (SE) (74) Representative: Ahrengart, Kenneth  ABB AB Intellectual Property Ingenjör Bååths Gata 11 721 83 Västerås 721 83 Västerås (SE)