(19)

(11)

EP 1 800 391 A2

(12)

(88) Date of publication A3: 06.07.2006 (43) Date of publication: 27.06.2007 Bulletin 2007/26 (21) Application number: 05794708.7 (22) Date of filing: 27.09.2005

(51) International Patent Classification (IPC):  H02M 7/757(2006.01) (86) International application number: PCT/EP2005/054823 (87) International publication number: WO 2006/035018 (06.04.2006 Gazette 2006/14)

(84) Designated Contracting States: DE SE (30) Priority: 27.09.2004 GB 0421440 (71) Applicant: AREVA T&D UK Ltd. Stafford, ST17 4LX (GB)	(72) Inventors: Barker, Carl D. Staffordshire ST15 0LN (GB) WHITEHOUSE, Robert, S. Stafford ST17 4NR (GB) (74) Representative: Poulin, Gérard et al Brevatome 3, rue du Docteur Lancereaux 75008 Paris 75008 Paris (FR)