The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 1999
Filed:
May. 11, 1998
Joseph J Matsko, Beaver, PA (US);
Robert Yanniello, Adren, NC (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A circuit breaker includes separable contacts for movement between a closed position and an open position, and an operating mechanism for moving the separable contacts between the closed and open positions. Current transformers and potential transformers sense current, voltage and frequency conditions of the separable contacts and produce signals corresponding to those electrical conditions. A trip unit employs those signals corresponding to the electrical conditions to produce a trip signal. A trip coil employs the trip signal to actuate the operating mechanism to move the separable contacts to the open position. A closing mechanism produces a close signal, and a close actuator mechanism employs the close signal to actuate the operating mechanism to move the separable contacts to the closed position. The trip unit includes a microprocessor-based firmware routine for selectively enabling and disabling the close actuator mechanism as a function of the signals corresponding to the electrical conditions.