(19)
(11) EP 3 304 105 A1

(12)

(43) Date of publication:
11.04.2018 Bulletin 2018/15

(21) Application number: 16802629.2

(22) Date of filing: 14.03.2016
(51) International Patent Classification (IPC): 
G01R 31/08(2006.01)
H02H 7/26(2006.01)
 H02H 3/40(2006.01)
(86) International application number:
PCT/FI2016/050158
(87) International publication number:
WO 2016/193529 (08.12.2016 Gazette 2016/49)
(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:
MA MD

(30) Priority: 03.06.2015 FI 20155423

(71) Applicant: ABB Schweiz AG
5400 Baden (CH)

(72) Inventors:
  • KAUPPINEN, Sakari
    43130 Tarvaala (FI)
  • PITKÄNEN, Risto
    44170 Hietama (FI)

(74) Representative: Kolster Oy Ab 
(Salmisaarenaukio 1) P.O. Box 204
00181 Helsinki
00181 Helsinki (FI)

   


(54) METHOD FOR EARTH FAULT PROTECTION FOR A THREE-PHASE ELECTRICAL NETWORK