Omicron Lab CT Analyzer User Manual page 106

CT Analyzer User Manual
104
3. Connect the CT to the CT Analyzer as described in chapter 2.
– Make sure that the red LED on the CT Analyzer is off.
– Refer to section 2.4.1 on page 24 for detailed information on how to
connect the CT Analyzer. The wiring for the residual magnetism
measurement is identical to the wiring for the CT test.
– Be sure that the polarity of all wires is correct.
– You can display the connection diagram by pressing the
the wiring check message is displayed.
Figure 6-8 Wiring diagram for residual magnetism measurement and
CT testing
4. Start the test by pressing the
Warning: Do not touch the equipment under test or the measurement leads
while the red LED on the CT Analyzer is flashing. Never connect or disconnect
measurement leads while the red LED on the CT Analyzer is flashing.
As long as the red LED is flashing, the output is active and lethal voltages can
occur due to the high energy stored in external inductors.
5. If the burden test is enabled, the test halts and the 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 4.3,
steps 2. & 3. on page 52.
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 the
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. The CT Analyzer runs the residual magnetism measurement.
9. If the primary resistance measurement is enabled, the test halts and the
CT Analyzer displays a corresponding message, asking you to check the
wiring for the test. Connect the CT Analyzer and run the primary winding
resistance measurement as described in section 4.3, steps 4. & 5. on
page 53.
10.After the primary resistance measurement is finished, the test halts to allow
rewiring for the CT test. Connect the CT Analyzer and run the CT test as
described in section 4.3, steps 6. to 11. on page 54.
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