Calibration of the Voltage Coefficient for High Accuracy 10 kV Two-Stage Voltage Transformer with the Summation Method

This paper focuses on the calibration of the voltage coefficient (VC) for the high accuracy 10 kV TSVT with the summation method by connecting other two VTs in series. Preliminary tests show that the VC of the 10 kV TSVT is around -4.3 × 10
^-6
and +1.2 μrad in magnitude and phase displacement from 10% U
_n
to 120% U
_n
.