8.3.6. Voltage Transformer Turns Ratio
For voltage transformer turns ratio measuring, first setup the connection based on chapter 6.7 then
follow the steps below:
In the main screen select only X1-X2
winding.
Be sure that Manual mode is not checked.
Select "TR" for only Turns Ratio
measurement.
Then you can press
Info button to enter
voltage transformer information.
In the 'Rated Current' screen you can enter
the voltage transformer primary to
secondary nominal turns ratio so the turns
ratio error can be calculated. For this enter
'1' for the secondary and enter the nominal
VT turns ratio in X1-X2.
For example if the nominal voltages of a
voltage transformer are 33kV/110V then
you have to enter the calculated ratio which
is 300 (33000/110=330).
Press OK button.
In the main screen press and hold
Start
button to measure the turns ratio.
90225-1.30 Instruction Manual CT-T1
Page 42 of 62