(19)

(11)

EP 0 865 634 A2

(12)

(43) Date of publication: 23.09.1998 Bulletin 1998/39 (21) Application number: 97945133.0 (22) Date of filing: 01.10.1997

(51) International Patent Classification (IPC):  H02J 3/ 00( . ) G06F 17/ 50( . ) G05B 17/ 02( . ) (86) International application number: PCT/SE1997/001649 (87) International publication number: WO 1998/015906 (16.04.1998 Gazette 1998/15)

(84) Designated Contracting States: DE FR GB IT SE (30) Priority: 07.10.1996 SE 19960003649 (71) Applicant: ASEA BROWN BOVERI AB 721 83 Västeras (SE)	(72) Inventor: BJÖRKLUND, Hans S-771 43 Ludvika (SE)