41
CT Analyzer Test Cards for Multi-Ratio CT Testing
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.
When the MR-Config. card is displayed but not in edit
mode (i.e., the card’s tab is highlighted as shown in Figure
6-3 on page 38) you can switch the common tap.
Example:
X1 is assumed as the default common tap, X5 as the
highest available tap: Press the Common Tap to X5 soft
key to use X5 as common tap instead of X1. The soft key
then changes to Common Tap to X1.
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.
Examples of intertap combinations: X2-X3, X2-X4, X3-X4.
Ipn : Isn (A) Use this column to set the nominal current ratio I
pn
/ I
sn
for
each tap combination.
The nominal ratio for the full tap combination (e.g. X1-X5 for
a 5-tap CT) is automatically taken from the CT-Object card
and cannot be changed in the MR-Config. card.
For all other tap combinations, I
pn
can be changed or
entered by the user. 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.
If a predefined multi-ratio scheme has been selected in the
CT-Object card using the soft keys (see ”I-pn” on page 36),
the CT Analyzer automatically enters the nominal CT ratios
for all tap combinations according to this scheme.
The ratios of the intertap combinations (e.g. X2-X4) are
calculated from the tap combinations and cannot be
changed by the user.
Parameter Description
To Next Page
Loading...
