Omicron Lab CT Analyzer User Manual page 113

Test results displayed in the Excitation card for IEC 60044-6
Param. Description
V-kn Knee point voltage according to standard.
I-kn Knee point current according to standard.
Ls Saturated inductance.
Lm Non-saturated inductance.
Ts Secondary time constant.
Kr Remanence factor.
Kssc Rated symmetrical short-circuit current factor at
accuracy limit with the selected load.
Ktd Theoretical transient dimensioning factor.
V-al Accuracy limiting voltage according to IEC 60044-
6 for class TPS (that point on the excitation graph
where an increase of the e.m.f. r.m.s. voltage
(core flux) by 10% causes an increase of the peak
current by 100%).
I-al Accuracy limiting current according to IEC 60044-
6 class TPS (at V
E1 User-defined e.m.f. to verify the excitation current
at this e.m.f.
Ie1 Max. allowed excitation current at E
E-max Maximum e.m.f. voltage.
This parameter allows the determination of the
working point on the excitation curve that would
be reached with the entered settings.
Peak instantaneous error at voltage E
^
ε
1. If the CT Analyzer is not able to measure up to the actual value, the prefix ">" is displayed to
indicate that the measurement value is larger than the displayed value.
1
).
al
.
1
.
max
The CT Analyzer Test Cards
Results displayed for
IEC 60044-6, class
TPS TPX TPY
x x x
x x x
x x x
x x x
x x x
x x x
x x
x x
x
x
x
x
x x
x x
TPZ
x
x
x
x
x
x
x
x
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