Assessment Card - Omicron CT SB2 User Manual

CT Analyzer User Manual
8.8

Assessment card

The Assessment card of the Advanced CT Test mode is only available if it is enabled in the Select
Cards page (Default Test Card Selection or Select Cards soft key in the CT-Object card).
Depending on the standard and the type of CT (protection or metering CT), the according parameters
are listed.
The automatic assessment column ("Auto") is automatically filled after the test is finished. The following
assessments are possible:
• OK assessment:
The result measured for the parameter complies with the requirements defined by the selected
standard and the parameters in the CT-Object card.
The overall test assessment OK is assigned if all required parameters could be measured and are
within the tolerances.
• Failed assessment:
The result measured for the parameter does not comply with the requirements.
The overall test assessment Failed is assigned if at least one parameter was assessed Failed.
• n/a assessment:
No assessment possible for the parameter due to one of the following reasons:
• Comparison with input parameter is not possible.
• Assessment does not make sense due to incorrect polarity or invalid measurement value.
• The parameter could not be determined due to an output limitation of CT Analyzer
(example: CT Analyzer was not able to deliver enough current).
The overall test assessment n/a is assigned if at least one parameter was assessed n/a (even if all
other parameters were assessed OK).
It is also possible to perform manual assessment for the individual parameters. To do this, select the
parameter to be assessed using the
Failed or ? soft key.
Use the Show failed & n/a only soft key to apply an according display filter. The Assessment card
then only displays the parameters with this assessment. Press Show all to display all parameters
again.
Figure 8-19: Assessment card (example)
Note: Correct and reliable assessment according to the standard is only guaranteed if you specify all
necessary CT data (nameplate data) prior to the test. If you enter the ? for one or more parameters to
have them determined by the guesser function of CT Analyzer, the automatic assessment may possibly
be incorrect if the values measured/determined for this parameters differ from the rated values the CT
should have according to the nameplate. In other words: If a parameter is guessed by CT Analyzer, the
automatic CT assessment is partly based on its actual values instead of its rated values and therefore
possibly incorrect.
130
cursor keys and apply your assessment using the OK,
Press to open the main menu
OMICRON