Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1997-08-15
2000-06-13
Karlsen, Ernest
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
361 934, 702 58, G01R 2726, G01R 3108, H02H 300
Patent
active
060753684
ABSTRACT:
A method of improving fault current measurement accuracy on a power line is disclosed. A first sample is obtained from a first input channel. A current magnitude is calculated from the first sample. The current magnitude is compared to a possible current saturation value. If the current magnitude is less than the possible current saturation value, a second sample from a second input channel is obtained, and the current magnitude is recalculated from the second sample. Lastly, the current magnitude is scaled by a scale factor. Also disclosed is an apparatus for improving fault current measurement accuracy on electronic reclosure control.
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Cummins James C.
Schumacher Philip P.
Cooper Industries Inc.
Karlsen Ernest
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