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EP 4 341 704 A1

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(43) Date of publication: 27.03.2024 Bulletin 2024/13 (21) Application number: 22804120.8 (22) Date of filing: 17.05.2022

(51) International Patent Classification (IPC):  G01R 31/08(2020.01) H02G 1/14(2006.01) H02G 15/117(2006.01) H01Q 1/22(2006.01) G01R 31/58(2020.01) H02G 15/10(2006.01) H02G 15/12(2006.01) G01S 19/14(2010.01) (52) Cooperative Patent Classification (CPC): H02G 9/02; G01R 31/083; G01R 19/2513 (86) International application number: PCT/FI2022/050330 (87) International publication number: WO 2022/243601 (24.11.2022 Gazette 2022/47)

(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 (30) Priority: 17.05.2021 FI 20215578 (71) Applicant: Tammerfast OY 33100 Tampere (FI)	(72) Inventor: SAARNI, Atte 37370 Vesilahti (FI) (74) Representative: Berggren Oy  P.O. Box 16 Eteläinen Rautatiekatu 10A 00101 Helsinki 00101 Helsinki (FI)