Method of configuring a microprocessor-based relay for use in overcurrent protection
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United States of America Patent
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Nov 16, 1999
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app pub date -
Feb 20, 1997
filing date -
Feb 20, 1997
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Abstract
A system for generating a time overcurrent curve from a set of time and current inputs. The overcurrent curve is generated by simultaneously finding four coefficients of a standard overcurrent equation. Two of the coefficients are found by successive approximation and two of the coefficients are found via a least squares fit approximation. After the coefficients are found, they are used in the standard overcurrent equation to produce a set of data points indicative of the overcurrent curve. The data points are transferred to an overcurrent relay for the detection of overcurrent conditions.
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