Data processing: measuring – calibrating – or testing – Calibration or correction system – For mechanical system
Patent
1997-02-20
1999-11-16
Trammell, James P.
Data processing: measuring, calibrating, or testing
Calibration or correction system
For mechanical system
702 58, 702 64, 36452828, 361 94, H02H 308
Patent
active
059873930
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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ABB Power T&D Company Inc.
Nguyen Cuong H.
Trammell James P.
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