(19)

(11)

EP 0 980 596 A1

(12)

(43) Date of publication: 23.02.2000 Bulletin 2000/08 (21) Application number: 98921987.8 (22) Date of filing: 07.05.1998

(51) International Patent Classification (IPC)7: H02G 9/02 (86) International application number: PCT/SE9800/841 (87) International publication number: WO 9850/991 (12.11.1998 Gazette 1998/45)

(84) Designated Contracting States: BE DE DK ES FI FR GB GR IE IT MC NL PT SE Designated Extension States: LT LV (30) Priority: 07.05.1997 SE 9701714 06.11.1997 SE 9704065 (71) Applicant: Vattenfall AB (publ) 162 87 Stockholm (SE)	(72) Inventors: SCHOENING, Jan-Christer S-179 60 Stenhamra (SE) EDLUND, Häkan S-165 56 Hässelby (SE) SJÖDIN, Jan-Olov S-162 68 Vällingby (SE) (74) Representative: Ellner, Lars O. et al AWAPATENT AB,Box 45086 104 30 Stockholm 104 30 Stockholm (SE)