Omicron Lab CT Analyzer - Running a Residual Magnetism Measurement; Resistance Card

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The CT Analyzer Test Cards
6.4.1 Test Settings and Results
The following settings and test results are displayed in the Residual Magnetism
card.
6.4.2 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 6-7 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.
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 the CT Analyzer.
The residual flux is always displayed after measurement,
even if the 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 the CT Analyzer was not able to
reach the knee point of the excitation curve.