Omicron Lab CT Analyzer, User Manual

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CT SB2 User Manual
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4.3 Automatic Test Execution
After starting the multi-ratio CT test, the CT Analyzer first checks the
communication with the CT SB2 via the serial interface. The CT Analyzer then
checks the input/output wiring between the CT Analyzer and the CT SB2 and,
prior to each measurement, the corresponding wiring from the CT SB2 to the
test object required for this particular measurement. If the CT Analyzer detects
any missing or faulty connections, a corresponding error message is displayed.
The currently active input/output of the CT SB2 switch box is indicated by a
green LED on the CT SB2 front panel.
1. The CT Analyzer measures the secondary winding resistance of the CT for
each tap combination.
2. The CT Analyzer measures the excitation curve and determines the knee
point and other important CT data for each tap combination.
3. The CT Analyzer measures the actual current ratio, the winding ratio, the
ratio error and the phase error for each tap combination.
4. When the test is over, the red LED stops flashing and the green LED is on.
The CT Analyzer displays a "Test finished" message showing the status of
the test execution and the overall test assessment. Press any key on the
keyboard to close this message.
4.4 After the Test is Finished
After the test is finished, the CT-Object card is displayed, showing the CT data
(see Figure 4-3).
Figure 4-3 CT-Object card after the test is finished
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