Document Type
Patent
Publication Date
1-29-2013
Patent Number
patent number 8362789
Abstract
Embodiments according to the present invention provide an Impedance-based Arc-Fault Determination Device (IADD) and method that, when attached to an electrical node on the power system and through observations on voltage, current and phase shift with a step load change, determine the effective Thevenin equivalent circuit or Norton equivalent circuit at the point of test. The device and method determine the expected bolted fault current at the test location of interest, which enables calculation of incident energy and the assignment of a flash-hazard risk category.
Application Number
12/573084
Assignees
Clemson University Research Foundation (Clemson, SC, US); Duke Energy Carolina, LLC (Charlotte, NC, US)
Filing Date
2009-10-02
Primary/U.S. Class
324/649
Other/U.S. Class
324/650, 361/79