Omicron CT SB2 User Manual page 61

Figure 5-8: CT test: Wiring check message (left) and wiring diagram (right)
7. Press the Start Test soft key to execute the automatic CT test.
Note: If you do not want to perform the CT test, press Skip Test to skip the CT test or Cancel Test
to abort the complete test.
8. Automatic test step 1: CT resistance measurement
CT Analyzer measures the secondary winding resistance of the CT.
9. Automatic test step 2: Determination of the excitation characteristic
CT Analyzer measures the excitation curve and determines the knee point and other important CT
data.
10. Automatic test step 3: Ratio measurement
CT Analyzer then measures the current ratio error, the phase error, the composite error and the
polarity. CT Analyzer calculates the ratio error for the operating burden and the nominal burden.
11. "Test finished" message
When the test is over, the red LED stops flashing and the green LED is on.
CT Analyzer displays a "Test finished" message showing the status of the test execution and the
overall test assessment (see Figure 5-9).
Press any key on the keyboard to close this message.
Figure 5-9: Test finished message when the test is over
Note: The test results and settings of each test started on CT Analyzer and finished with the "Test
ok" status are automatically stored to the file OMICRON\AutoSave\CTAnalyzer.xml on the
Compact Flash card. The existing CTAnalyzer.xml file is overwritten with each successful test. Tests
that could not be finished successfully or that were aborted by the user are not stored and thus do
not overwrite the existing CTAnalyzer.xml file. Tests executed from the CT Analyzer Suite software
are not saved automatically on CT Analyzer and therefore do not overwrite the CTAnalyzer.xml file.
OMICRON
CT testing in Advanced CT Test mode ("New Advanced CT Test")
Press
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