Arrangement for determining the angular error of level wall learn for energy - and are power

摘要

Arrangement for determining the angular error of electric meter assemblies that include level matching components such as shunts or voltage dividers. These level converters cause a phase shift or angular error that decreases measurement accuracy. A meter to be tested has a first frequency signal applied to its input with the resultant output multiplied by a second reference frequency. The angle error is determined from the phase displacement of the product signal.