(19)

(11)

EP 3 058 576 A1

(12)

(43) Date of publication: 24.08.2016 Bulletin 2016/34 (21) Application number: 14795967.0 (22) Date of filing: 14.10.2014

(51) International Patent Classification (IPC):  H01F 27/28(2006.01) H01F 38/28(2006.01) (86) International application number: PCT/EP2014/071978 (87) International publication number: WO 2015/055628 (23.04.2015 Gazette 2015/16)

(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 (30) Priority: 17.10.2013 IT MI20131736 (71) Applicant: ABB S.p.A. 20124 Milano (IT)	(72) Inventors: ANTONELLO, Paolo I-20010 Arluno (MI) (IT) COLOMBO, Franco I-21046 Malnate (CO) (IT) (74) Representative: De Bortoli, Eros et al Zanoli & Giavarini S.p.A. Via Melchiorre Gioia, 64 20125 Milano 20125 Milano (IT)