Patent ID: 7305310
Filing Date: 2007-12-04
Classification: G01R

Abstract:
1. A meter device for measuring electrical energy comprising: circuitry for measuring at least one parameter of electrical energy provided to the meter device; a storage device for storing at least one calibration factor for compensating for errors associated with at least one of at least one current transformer (CT) and at least one potential transformer (PT) that operates on the electrical energy provided to the meter device; and at least one processor for processing the at least one calibration factor for adjusting the measuring for compensating for the errors when measuring the electrical energy; wherein calibration factors of the at least one calibration factor correct for errors measured during testing of respective test points of a series of test points, each test point corresponding to a different current magnitude for modeling non-linearity of errors associated with a range of current magnitudes for current signals of the electrical energy operated on by the at least one CT, and at least one calibration point corresponds to each test point; and wherein the greater the non-linearity of the errors, the greater the concentration of test points.