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(11)

EP 2 218 088 A1

(12)

(43) Date of publication: 18.08.2010 Bulletin 2010/33 (21) Application number: 08855801.0 (22) Date of filing: 02.12.2008

(51) International Patent Classification (IPC):  H01H 83/22(2006.01) (86) International application number: PCT/EP2008/066648 (87) International publication number: WO 2009/071552 (11.06.2009 Gazette 2009/24)

(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 MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 04.12.2007 IT MI20072278 (71) Applicant: ABB S.p.A. 20124 Milano (IT)

(72) Inventors: ANTONIAZZI, Alberto I-20080 Zibido San Giacomo (MI) (IT) VILLANI, Andrea I-20081 Abbiategrasso (MI) (IT) PALEARI, Ivan I-20023 Cerro Maggiore (MI) (IT) TINELLI, Marco I-20127 Milano (IT) CHIARAVALLI, Matteo I-21020 Daverio (VA) (IT) ABBATTISTA, Tommaso I-20162 Milano (IT) (74) Representative: Giavarini, Francesco et al Zanoli & Giavarini S.r.l. Via Melchiorre Gioia, 64 20125 Milano 20125 Milano (IT)