OMICRON 111
Test cards for Advanced CT Test mode
3. Connect the CT to CT Analyzer as described in chapter 3.
â–º Make sure that the red LED on CT Analyzer is off.
â–º Refer to section 3.4.1 on page 27 for detailed information on how to connect CT Analyzer. The
wiring for the residual magnetism measurement is identical to the wiring for the CT test.
â–º Be sure that the polarity of all wires is correct.
â–º You can display the connection diagram by pressing the key while the wiring check
message is displayed.
Figure 8-8: Wiring diagram for residual magnetism measurement and CT testing
4. Start the test by pressing the key.
5. If the burden test is enabled, the test halts and CT Analyzer displays a corresponding message,
asking you to check the wiring for the burden test. Connect the burden and run the burden test as
described in section 5.2.3, steps 2. & 3. on page 57.
6. After the burden measurement is finished, the test halts to allow rewiring for the residual magnetism
measurement. Make sure that the red LED on CT Analyzer is off and reconnect the CT as described
in step 3 above.
7. Continue testing by pressing the Start Test soft key.
8. CT Analyzer runs the residual magnetism measurement.
9. If the primary resistance measurement is enabled, the test halts and CT Analyzer displays a
corresponding message, asking you to check the wiring for the test. Connect CT Analyzer and run
the primary winding resistance measurement as described in section 5.2.3, steps 4. & 5. on page 58.
10. After the primary resistance measurement is finished, the test halts to allow rewiring for the CT test.
Connect CT Analyzer and run the CT test as described in section 5.2.3, steps 6. to 11. on page 59.
WARNING
Death or severe injury caused by high voltage or current possible
As long as the red LED on the CT Analyzer test set is flashing, the output is active
and lethal voltages can occur due to the high energy stored in external inductors.
â–º Do not touch the equipment under test or the measurement leads while the red
LED on CT Analyzer is flashing.
â–º Never connect or disconnect measurement leads while the red LED on
CT Analyzer is flashing.
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