SYSTEM FOR MONITORING CIRCUIT BREAKER OPERATIONS AND ALERTING NEED OF PREVENTATIVE MAINTENANCE - Patent 0594830

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EP 0 594 830 A1

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(43)	Date of publication:
	04.05.1994 Bulletin 1994/18

(21)	Application number: 93911207.0

(22)	Date of filing: 10.05.1993

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International Patent Classification (IPC):

G01R 31/ 327^{( . )}
H01H 11/ 00^{( . )}

G01R 31/ 333^{( . )}
H01H 1/ 00^{( . )}

(86)	International application number:
	PCT/US1993/004410

(87)	International publication number:
	WO 1993/023760 (25.11.1993 Gazette 1993/28)

(84)	Designated Contracting States:
	DE FR GB IT

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Priority:

12.05.1992 US 19920881903

(71)	Applicant: SQUARE D COMPANY
	Palatine, IL 60067 (US)

(72)	Inventor:
	SWINDLER, David, L. Murfreesboro, TN 37129 (US)

(74)	Representative: Sorrell, Terence Gordon, et al
	Fitzpatricks, Cardinal Court, 23, Thomas More Street London E1 9YY London E1 9YY (GB)

(54)	SYSTEM FOR MONITORING CIRCUIT BREAKER OPERATIONS AND ALERTING NEED OF PREVENTATIVE MAINTENANCE