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winding resistance for the selected tap. After measurement winding resistance is displayed in
digital and analog format on the screen.
Note:
A CT should be demagnetized after running the winding resistance test. Run a saturation
test to demagnetize the CT at the completion of all winding resistance tests.
9.5 CT Insulation Test:
Refer to the safety instructions first before use of the equipment.
1.
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).
2.
Connect the ground wing nut to a suitable ground.
3.
Connect the test set secondary output
SOURCE
binding posts
X1S
and
X5S
to the
secondary of the
current transformer on the desired tap.
4.
Connect the test set secondary output binding posts X1 and X5 to secondary of the current
transformer on the tap of the Outer Winding. Observe the polarity marks on the CT (X1 on test set
is polarity terminal).
5.
Turn Power ON/OFF switch to ON.
After boot up, in the Home Screen select the “Insulation Test” button
17.
In the Insulation test screen, select the desired test level of either 500V or 1 KV by using the Voltage
selection button
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.
