(19)

(11)

EP 2 443 735 A1

(12)

(43) Date of publication: 25.04.2012 Bulletin 2012/17 (21) Application number: 09779835.9 (22) Date of filing: 18.06.2009

(51) International Patent Classification (IPC):  H02M 7/797(2006.01) H02J 3/36(2006.01) H02J 3/18(2006.01) (86) International application number: PCT/EP2009/057620 (87) International publication number: WO 2010/145705 (23.12.2010 Gazette 2010/51)

(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 MK MT NL NO PL PT RO SE SI SK TR (71) Applicant: Areva T&D UK Limited Stafford, Staffordshire ST17 4LX (GB)	(72) Inventor: OATES, Colin Donald Murray Stafford Staffordshire ST17 4LX (GB) (74) Representative: Ilgart, Jean-Christophe et al BREVALEX 95 rue d'Amsterdam 75378 Paris Cedex 8 75378 Paris Cedex 8 (FR)