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EP 2 223 308 A1

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(43) Date of publication: 01.09.2010 Bulletin 2010/35 (21) Application number: 07866307.7 (22) Date of filing: 21.12.2007

(51) International Patent Classification (IPC):  H01B 1/20(2006.01) H01H 33/70(2006.01) C08L 27/18(2006.01) (86) International application number: PCT/EP2007/064504 (87) International publication number: WO 2009/080123 (02.07.2009 Gazette 2009/27)

(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 MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (71) Applicant: ABB Research Ltd. 8050 Zürich (CH)	(72) Inventors: GREUTER, Felix CH-5406 Baden-Rütihof (CH) SEEGER, Martin CH-8046 Zürich (CH) NIEMEYER, Lutz CH-5242 Birr (CH) STOLL, Dieter CH-8180 Bülach (CH) SCHAAL, Stéphane F-68510 Sierentz (FR) (74) Representative: ABB Patent Attorneys  C/o ABB Schweiz AG Intellectual Property (CH-LC/IP) Brown Boveri Strasse 6 5400 Baden 5400 Baden (CH)