Document Type

Patent

Publication Date

10-6-2009

Patent Number

patent number 7598751

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

11/838831

Assignees

Clemson University Research Foundation (Clemson, SC, US); Duke Energy Carolinas, LLC (Charlotte, NC, US)

Filing Date

2007-08-14

Primary/U.S. Class

324/649

Other/U.S. Class

361/79

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