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. 31, 2010
Filed:
Jul. 02, 2007
Susan Jean Walker Colsch, Shellsburg, IA (US);
William Davison, Cedar Rapids, IA (US);
David Joseph Dunne, Cedar Rapids, IA (US);
Kevin John Malo, Iowa City, IA (US);
Steve M. Meehleder, Cedar Rapids, IA (US);
Ryan James Moffitt, Coralville, IA (US);
Richard Allen Studer, Ii, Wesley, IA (US);
Gary Michael Stumme, Cedar Rapids, IA (US);
Susan Jean Walker Colsch, Shellsburg, IA (US);
William Davison, Cedar Rapids, IA (US);
David Joseph Dunne, Cedar Rapids, IA (US);
Kevin John Malo, Iowa City, IA (US);
Steve M. Meehleder, Cedar Rapids, IA (US);
Ryan James Moffitt, Coralville, IA (US);
Richard Allen Studer, II, Wesley, IA (US);
Gary Michael Stumme, Cedar Rapids, IA (US);
Square D Company, Palatine, IL (US);
Abstract
A method and system to calibrate a motor circuit protection device is disclosed. An example method calibrates a signal chain of a circuit breaker. The signal chain includes a current transformer, a burden resistor, a stored energy circuit and a controller. The circuit breaker includes a memory coupled to the controller. A calibration instruction routine is written in a first location of the memory. A test current is injected in the circuit breaker signal chain. The test current peak of the test current in the circuit breaker signal chain is measured. Data indicative of the test current peak is stored in a second location of the memory. The test current peak data is read from the second location of the memory. The test current peak data is compared with nominal current data related to the signal chain remotely from the circuit breaker. A calibration factor is determined based on the comparison.