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:
Sep. 11, 2007
Filed:
Aug. 31, 2005
Patrick W. Mills, Bradenton, FL (US);
Kevin D. Gonyea, Bradenton, FL (US);
Richard G. Benshoff, Sarasota, FL (US);
Jeffrey C. Lawton, Camarillo, CA (US);
Maurice R. Ellsworth, Bradenton, FL (US);
Patrick W. Mills, Bradenton, FL (US);
Kevin D. Gonyea, Bradenton, FL (US);
Richard G. Benshoff, Sarasota, FL (US);
Jeffrey C. Lawton, Camarillo, CA (US);
Maurice R. Ellsworth, Bradenton, FL (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A tester for testing a circuit breaker includes a plurality of load elements each having a nominal fixed impedance and an electronic switch associated with each load element. The electronic switch, when turned on, electrically connects a corresponding load element in series with a circuit breaker load terminal and in parallel with none or with a number of other load elements. A controller turns on a number of the electronic switches selected to draw through a corresponding number of the load elements a test current selected as a function of a designated rated current for the circuit breaker and sufficient to trip open the same. A pulse width modulation circuit cooperates with the controller and with the electronic switches. The pulse width modulation circuit provides a constant magnitude of the test current to accommodate variations of the nominal fixed impedance or variations of the voltage of the load terminal.