Omicron Lab CT Analyzer, User Manual

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The CT Analyzer Test Cards
6.5.3 Test Settings and Results
The following settings are required to perform a winding resistance test.
The following parameters show the results of the winding resistance test after
the test is finished.
Parameter Description
T-meas Winding temperature of the CT at the time of measurement.
Value used:
Ambient Temperature defined in the
Settings (main menu).
If this temperature is not set correctly, the reference resistance
value (R
ref
) at reference temperature will not be calculated
correctly.
T-ref Reference temperature, i.e, temperature the CT is specified for.
Value used:
Reference temperature defined in the
Settings (main menu).
The winding resistance at reference temperature is calculated
from the winding resistance measured at ambient temperature
(T
meas
) and the specified reference temperature.
Parameter Description
I-DC Current used for measurement. Selected automatically, cannot
be changed by the user.
Secondary winding resistance measurement only:
If I
sn
is between 0.1 and 1 A, I
DC
is automatically set to I
sn
.
If I
sn
is lower than 0.1 A, I
DC
is automatically set to 0.1 A.
Maximum value: 1 A.
Primary winding resistance measurement only:
Maximum value: 10 A.
V-DC Measured voltage.
R-meas Measured resistance at ambient temperature.
R-ref Reference resistance (temperature-compensated resistance,
compensated to T
ref
).