(19)

(11)

EP 1 964 238 A2

(12)

(88) Date of publication A3: 14.02.2008 (43) Date of publication: 03.09.2008 Bulletin 2008/36 (21) Application number: 06849521.7 (22) Date of filing: 15.12.2006

(51) International Patent Classification (IPC):  H02J 13/00(2006.01) G05B 19/418(2006.01) (86) International application number: PCT/IB2006/004183 (87) International publication number: WO 2007/093850 (23.08.2007 Gazette 2007/34)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 15.12.2005 US 750384 P (71) Applicant: ABB Technology Ltd 8050 Zürich (CH)	(72) Inventors: PADURARU, Sergiu SE-725 63 Västerås (SE) KINNUNEN, Lasse SE-730 50 Skultuna (SE) STEINER, Paul CH-8832 Wollerau (CH) (74) Representative: Kock, Ina  ABB AB Intellectual Property Forskargränd 7 721 78 Västerås 721 78 Västerås (SE)