(19)

(11)

EP 0 819 328 A1

(12)

(43) Date of publication: 21.01.1998 Bulletin 1998/04 (21) Application number: 96913494.0 (22) Date of filing: 04.04.1996

(51) International Patent Classification (IPC):  H02H 3/ 08( . ) H02H 3/ 10( . ) G01R 19/ 165( . ) H02H 3/ 33( . ) (86) International application number: PCT/EP1996/001519 (87) International publication number: WO 1996/031931 (10.10.1996 Gazette 1996/45)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IE IT LI NL PT SE (30) Priority: 07.04.1995 IE 19950000256 (71) Applicant: Norcel Limited Londonderry BT48 0LY (GB)	(72) Inventors: ARMSTRONG, Charles, Vincent Londonderry BT47 2NT (GB) BONNER, James County Donegal (IE) (74) Representative: O'Connell, Maura, et al  F. R. Kelly & Co., 9, University Street Belfast, BT7 1NA Northern Ireland Belfast, BT7 1NA Northern Ireland (GB)