(19)

(11)

EP 1 864 305 A2

(12)

(88) Date of publication A3: 10.05.2007 (43) Date of publication: 12.12.2007 Bulletin 2007/50 (21) Application number: 06725430.0 (22) Date of filing: 30.03.2006

(51) International Patent Classification (IPC):  H01F 29/04(2006.01) H01H 9/54(2006.01) (86) International application number: PCT/EP2006/061177 (87) International publication number: WO 2006/103268 (05.10.2006 Gazette 2006/40)

(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 YU (30) Priority: 31.03.2005 GB 0506472 (71) Applicant: Areva T&D SA 92084 Paris La Défense (FR)	(72) Inventor: Oates, Donald Colin Murray Brocton Staffordshire ST17 0TL (GB) (74) Representative: Poulin, Gérard et al Brevatome 3, rue du Docteur Lancereaux 75008 Paris 75008 Paris (FR)