102
A variable AC source is applied on the primary side. The primary and secondary voltages are measured
to determine the ratio V2/V1
The angle between the primary system voltage V
p
and the secondary voltageV
s
is the phase error.
10.2 Testing Voltage Transformer Secondary Winding Resistance
Refer to the safety instructions first before use of the equipment.
22. Verify the Power ON/OFF switch is OFF. Power the test set from a suitable source
of power (95-125 or 195-265 V50/60 Hz).
23. Connect the ground wing nut to a suitable ground.
24. Connect the test set secondary output SOURCE binding posts X1S and X5S to the desired
secondary terminals of the voltage transformer.
25. Connect the test set secondary output binding posts X1 and X5 to desired secondary terminals of
the voltage transformer. Observe the polarity marks on the CT (X1 on test set is polarity
terminal).
26. Turn Power ON/OFF switch to ON.
27. After boot up, in the Home Screen put the MRCT in voltage transformer testing mode by selecting
the VT button.
28. Select the “Winding Resistance Test” button In the VT section of the Home Screen. This will
activate the winding resistance test screen
WARNING
There is always the possibility of voltages being induced at the terminals of a test
specimen because of proximity to high voltage energized lines. A residual static voltage
charge may also be present at these terminals. Ground each terminal to be tested with a
safety ground stick, before making connections.
WARNING
The MRCT produces high voltages and currents during the performance of tests. DO NOT
TOUCH connector clips or test leads while the MRCT is performing a test.
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