NDB Technologies CTT Series User Manual page 21

8.1.2 Manual mode test sequence
This section describes how to configure the CTT for manual testing of a current
transformer.
1. Press the Menu key.
2. Select Mode - Manual.
3. Press the navigation knob to edit the test voltage range.
4. Rotate the knob to select the voltage range according to the specification of
the CT to test. Press the knob to accept. If the maximum voltage is not known,
refer to section 11.
5. Press the Start/Test key to start the test.
6. Start rotating the knob clockwise one click at a time (allow half a second
between each click). The saturation curve will
will be displayed on the right side of the screen. The test ends when the CT is
fully saturated, or by pressing the Start/Test key.
Tip: A more defined saturation curve can be plotted by alternating the ramping
up then ramping down of the applied test voltages during the test.
7. When done, re-position X1 and X2 clips on the next winding to be tested.
Note: Tests results in manual cannot be saved, exported or printed. Manual
mode is intended for diagnostic purposes.
C T T S e r i e s - U s e r M a n u a l
be plotted,
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and the other results