OMICRON 127
Test cards for Advanced CT Test mode
8.7.3 Test results
The following test results are displayed in the lower part of the Ratio card. In addition to the results
displayed in the Ratio card you can view the ratio and phase table pages described in section 8.7.4 on
page 128 and 8.7.5 on page 129.
Table 8-27: Test results in the Ratio card
Parameter Description
Ratio Current ratio error (in %) at the specified primary current (I
p
) and burden.
Pol. OK: Polarity OK, phase angle is in the range of 0° ± 45°.
Failed: Wrong polarity of the CT or wrong polarity of the measurement leads.
ε
C
Composite error in % at the specified primary current (I
p
) and operating burden.
This parameter is only displayed if the IEC 60044-1 standard is selected in the
CT-Object card.
Phase Phase displacement (in minutes) at the specified primary current (I
p
) and burden.
N Winding turns ratio.
εt
Turns ratio error acc. to IEC 60044-6 class TPS or IEC 60044-1 class PX.
RCF Ratio correction factor.
This parameter is only displayed if the IEEE C57.13 standard is selected in the
CT-Object card.
TCF Transformer correction factor.
This parameter is only displayed if the IEEE C57.13 standard is selected in the
CT-Object card.
RE@(20*Isn) Ratio error at 20 * I
sn
.
This parameter is only displayed if the IEEE C57.13 standard with class C, T or X is
selected in the CT-Object card.
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