CT SB2 User Manual
28
Tap in Use Select the tap combination actually used during operation of
the CT (e.g. X1-X5) using the soft keys. By default, the "Tap
in Use" field is set to the full tap combination.
For the tap combination selected here, the CT Analyzer
displays the detailed test results in the Resistance,
Excitation and Ratio cards. The automatic test
assessment in the Assessment card is however always
done for the full tap combination given by the
Number of Taps (e.g. for X1-X5 if number of taps = 5).
Taps This column lists all possible tap combinations of the CT
(e.g. X1-X5, X1-X4, X1-X3, ...). The number of available tap
combinations depends on the number of taps specified in
the "Number of Taps" field.
Note: When the MR-Config. card’s tab is highlighted you
can select whether X1 or the highest available tap is used as
the common tap. The default common tap can be selected in
the device settings of the CT Analyzer, see chapter 5 on
page 33.
Using the Show Inter Taps soft key you can display the
intertap combinations instead of the tap combinations. If the
intertap combinations are displayed, the soft key changes to
Show Taps.
Ipn : Isn (A) Enter the nominal ratio for each single tap combination.
If you selected a predefined multi-ratio scheme for
IEEE C57.13 in the CT-Object card, this column is
automatically filled with predefined ratios for all tap
combinations.
If you entered I
pn
and I
sn
manually in the CT-Object card,
you have to specify the I
pn
for each tap combination in this
column. I
sn
is always taken from the CT-Object card.
Note: The CT Analyzer automatically performs a plausibility
check for the ratios entered by the user. For example, an
error message is displayed if the I
pn
entered for X1-X3 is
higher than the I
pn
specified for X1-X4.
Note: The data for the full tap combination can only be set in
the CT-Object card.
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