(19)

(11)

EP 0 852 805 A1

(12)

(43) Date of publication: 15.07.1998 Bulletin 1998/29 (21) Application number: 96931141.0 (22) Date of filing: 18.09.1996

(51) International Patent Classification (IPC):  H01H 33/ 56( . ) (86) International application number: PCT/GB1996/002304 (87) International publication number: WO 1997/012383 (03.04.1997 Gazette 1997/15)

(84) Designated Contracting States: DE FR GB IT NL SE (30) Priority: 25.09.1995 GB 19950019548 (71) Applicant: Gec Alsthom T & D Long and Crawford Limited Manchester M11 1FL (GB)	(72) Inventors: WILKINSON, Allen Manchester M18 8WJ (GB) WEBB, David, Albert Cheshire CW9 8HB (GB) (74) Representative: Hoste, Colin Francis  The General Electric Company p.l.c. GEC Patent Department Waterhouse Lane Chelmsford, Essex CM1 2QX Chelmsford, Essex CM1 2QX (GB)