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:
Dec. 12, 1995
Filed:
Mar. 05, 1993
Richard L Apothaker, Northfield, NJ (US);
Square D Company, Palatine, IL (US);
Abstract
An associative current interrupter system provides improved circuit protection and electrical safety. A test control unit (200) applies a regulated series of input voltage levels to the appliance (300) which is to be subsequently protected under a series of minimum and maximum load sequences. The resulting data series is logged and compressed into a format suitable for downloading into a programmable interrupter (100). A remote interface (217) is provided to allow device-specific data series to be input from alternative sources. When the appliance is connected in series with the interrupter (100), load current, line voltage, and time constraints are sampled and compared to the data series, thus providing a continuous solution to the determination of normal vs. abnormal currents. An output relay (103) provides a switching element and an internally accessible calibration port (111) allows monitoring combined non-linearities for correction during manufacture.