(19)

(11)

EP 2 850 711 A1

(12)

(43) Date of publication: 25.03.2015 Bulletin 2015/13 (21) Application number: 12722350.1 (22) Date of filing: 16.05.2012

(51) International Patent Classification (IPC):  H02J 3/14(2006.01) H02J 3/38(2006.01) (86) International application number: PCT/EP2012/059165 (87) International publication number: WO 2013/170895 (21.11.2013 Gazette 2013/47)

(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 Designated Extension States: BA ME (71) Applicant: ABB AG 68309 Mannheim (DE)	(72) Inventors: RIZVANOVIC, Larisa S-724 71 Västerås (SE) STOLL, Pia S-723 46 Västerås (SE) BAG, Gargi S-723 44 Västerås (SE) ÅKERHOLM, Mikael S-722 40 Västerås (SE) Rossebø, Judith N-0852 Oslo (NO)