OMICRON 27
CT testing in Advanced MR Test mode ("New Advanced MR Test")
2. In the CT-Object card, specify the CT data according to the CT’s name plate. Specify the data in the
order of the following table.
Figure 6-1: CT-Object card for Advanced MR Test mode
Note: Table 6-2 provides brief descriptions of the most important parameters and fields available in
the CT-Object card. Depending on the selected standard and CT type, other or further CT data may
be necessary for a correct assessment. If the "Check "*" settings before start" option is enabled in
the default test settings of CT Analyzer, all parameters that are required for assessment are marked
by a star "*" in the CT-Object card. For complete information, please refer to section 9.1 on page 47
or the CT Analyzer User Manual.
Table 6-2: Data to be specified in the CT-Object card
Parameter Description
I-pn
I-sn
Rated primary current for the full tap combination of the CT and rated
secondary current of the CT.
The CT data for the full tap combination can only be set in the CT-Object card.
If the selected standard is IEEE C57.13 and the "Number of Taps" is set to 5 or 3
in the MR-Config. card, CT Analyzer offers soft keys with predefined ratios when
the "I-pn" field is selected with the cursor. If you select one of these predefined
multi-ratio schemes, CT Analyzer automatically specifies the ratios for all tap
combinations in the MR-Config. card.
If the selected standard is not IEEE C57.13, enter the values for I
pn
and I
sn
manually.
Standard Standard to be used for the CT test and the test assessment.
P/M CT type. Set "P" for a protection CT or "M" for a metering CT.
Class Rated accuracy class of the CT. This field becomes available after selecting the
CT type (protection or metering CT).
VA (or Vb)
cos ϕ
Nominal burden for the full tap combination of the CT.
For protection CTs of the IEEE C57.13 classes C, K and T, enter the rated
secondary terminal voltage V
b
instead of VA. CT Analyzer then automatically
calculates the value for VA.
The cos ϕ for the nominal burden is automatically selected according to the
standard.
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