(19)

(11)

EP 4 360 176 A1

(12)

(43) Date of publication: 01.05.2024 Bulletin 2024/18 (21) Application number: 21736575.8 (22) Date of filing: 22.06.2021

(51) International Patent Classification (IPC):  H02G 5/06(2006.01) (52) Cooperative Patent Classification (CPC): H02G 5/066; H02G 5/068 (86) International application number: PCT/EP2021/067027 (87) International publication number: WO 2022/268305 (29.12.2022 Gazette 2022/52)

(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 Designated Validation States: KH MA MD TN (71) Applicant: Hitachi Energy Ltd 8050 Zürich (CH)	(72) Inventor: WANG, Jun Fujian, 361100 (CN) (74) Representative: Michalski Hüttermann & Partner Patentanwälte mbB  Kaistraße 16A 40221 Düsseldorf 40221 Düsseldorf (DE)