CT Analyzer User Manual
110 OMICRON
8.4.1 Test settings and results
The following settings and test results are displayed in the Residual Magnetism card.
8.4.2 Running a residual magnetism measurement
1. Press the Select Cards soft key in the CT-Object card to open the Select Cards page. Enable the
Residual Magnetism test card in the Select Cards page. Press the Back soft key to apply your test
card selection and return to the CT-Object card.
Figure 8-7: Select Cards page with Residual Magnetism test card enabled
2. If not already specified, enter the I
sn
of the CT on the CT-Object card.
Table 8-14: Test settings and results in the Residual Magnetism card
Parameter Description
I-sn Nominal secondary current of the CT as entered in the CT-Object card.
The I
sn
of the CT has to be specified prior to the execution of the residual
magnetism measurement. Otherwise, a corresponding message is displayed.
Residual Flux Absolute value [in Vs] of the residual magnetic flux in the CT determined by
CT Analyzer.
The residual flux is always displayed after measurement, even if CT Analyzer
could not determine the residual magnetism.
Residual Magnetism Residual magnetism [in %] of the CT, calculated from the residual flux and the
maximum flux of the CT.
No value is displayed if CT Analyzer was not able to reach the knee point of the
excitation curve.
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