(19)

(11)

EP 2 569 794 A1

(12)

(43) Date of publication: 20.03.2013 Bulletin 2013/12 (21) Application number: 11720431.3 (22) Date of filing: 09.05.2011

(51) International Patent Classification (IPC):  H01H 33/59(2006.01) (86) International application number: PCT/EP2011/057433 (87) International publication number: WO 2011/141428 (17.11.2011 Gazette 2011/46)

(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: 11.05.2010 WO PCT/EP2010/056474 (71) Applicant: ABB Technology AG 8050 Zürich (CH)	(72) Inventor: SKARBY, Per CH-5400 Baden (CH) (74) Representative: Ahrengart, Kenneth et al ABB AB Intellectual Property Ingenjör Bååths Gata 11 721 83 Västerås 721 83 Västerås (SE)