Method of improving fault current measurement accuracy on electr

Details Method of improving fault current measurement accuracy on electr Method of improving fault current measurement accuracy on electr

1995-03-10

1997-12-23

Karlsen, Ernest F.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324115, H01H 3102, G01R 1512

Patent

active

057010803

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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