Abstract
A setup has been developed to determine the voltage dependence of the
ratio error and phase displacement of current transformers (CTs) used
for medium- or high-voltage (HV) applications. A shielded HV cable is
used to protect the reference CT for the voltage applied to the CT under
test. As a first step, a method was developed to determine and correct
for the effect of the leakage current through this cable on the ratio
error and phase displacement of the reference CT for voltages up to 24
kV.