(19)

(11)

EP 2 379 366 A2

(12)

(88) Date of publication A3: 21.04.2011 (43) Date of publication: 26.10.2011 Bulletin 2011/43 (21) Application number: 09753061.2 (22) Date of filing: 29.10.2009

(51) International Patent Classification (IPC):  B60M 1/04(2006.01) H01B 17/62(2006.01) B61D 39/00(2006.01) (86) International application number: PCT/EP2009/064278 (87) International publication number: WO 2010/072452 (01.07.2010 Gazette 2010/26)

(84) Designated Contracting States: 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 Designated Extension States: AL BA RS (30) Priority: 22.12.2008 SE 0802654 (71) Applicant: ABB Technology AG 8050 Zürich (CH)	(72) Inventor: HÄRDELL, Lennart S-777 50 Smedjebacken (SE) (74) Representative: Tarkpea, Pia  ABB AB Intellectual Property Ingenjör Bååths Gata 11 721 83 Västerås 721 83 Västerås (SE)