OMICRON 39
CT Analyzer test cards for MR Test mode
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.
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.
The ratios of the intertap combinations (e.g. X2-X4) are calculated from the tap
combinations and cannot be changed by the user.
Test In this column, select the tap combinations you actually want to measure during
the test.
Select or deselect each single tap combination individually using the Enable and
Disable soft keys. It is not possible to disable the full tap combination.
Disabling unused tap combinations reduces the test duration. Disabled taps are
not measured. Therefore, no test results are available for disabled tap
combinations.
Disabling a tap combination also disables the corresponding intertap
combinations. It is not possible to disable a specific intertap combination.
Table 8-3: Parameters and settings (continued)
Parameter Description
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