Test Results Card For Mr Test Mode; Available Soft Keys; Test Results Displayed - Omicron CT SB2 User Manual

CT SB2 User Manual
8.4

Test Results card for MR Test mode

The Test Results card of the MR Test mode displays the test results for the tap combination selected
as tap in use in the MR-Config. card prior to the test.
Figure 8-4: Test Results card for MR Test mode
8.4.1

Available soft keys

Table 8-7: Soft keys available in the Test Results card
Soft key Description
Displays detailed results of the secondary winding resistance test. See section 8.4.3
below.
Displays the excitation graph calculated from the measurement results. See section
8.4.4 below.
8.4.2

Test results displayed

The following test results are displayed directly in the Test Results card.
Table 8-8: Test results displayed in the Test Results card
Parameter
Sec. winding resist.
Knee-point voltage
CT-Ratio@Ipn(0VA)
ε
RCF
Phase
Pol.
F
and
ε
@Ipn*F
c
42
Description
Measured secondary winding resistance of the tap combination.
Measured knee point voltage.
Current ratio at nominal primary current and 0 VA burden.
Available for IEC standards only. Error in % at nominal primary current and
0 VA burden.
Available for IEEE C57.13 only. Ratio correction factor.
Phase displacement at nominal primary current and 0 VA burden.
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.
Two additional parameters are available for IEC 60044-1 and IEC 61869-2
protection CTs to allow the display of the composite error for different
multiples of the nominal secondary current I
Use the "F" parameter to specify the factor (for example, 1 x, 5 x, or 10 x I
and read the resulting composite error from the "ε
.
sn
@Ipn*F" field.
c
)
sn
OMICRON