OMICRON 117
Test cards for Advanced CT Test mode
Test results displayed in the Excitation card for IEC 60044-1
Table 8-18: Test results for IEC 60044-1
Param. Description Results displayed for
IEC 60044-1
protection CTs metering
CTs
...P ...PR PX
V-kn Knee point voltage (acc. to standard) of the topmost knee
point found.
xxx x
I-kn Knee point current (acc. to standard) of the topmost knee
point found.
xxx x
Ls Saturated inductance. x x x x
Lm Non-saturated inductance. x x x x
Ts Secondary time constant. x x x x
Kr Remanence factor. x x x x
ε
i
Indirect error (acc. to standard).
xx x
ALF Accuracy limiting factor according to IEC 60044-1 direct
measurement method, calculated for nominal and operating
burden.
1
1. If 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.
xx
ALFi Accuracy limiting factor according to IEC 60044-1 indirect
measurement method, calculated for nominal and operating
burden.
1
xx
FS Instrument security factor according to IEC 60044-1 direct
measurement method, calculated for nominal and operating
burden.
1
x
FSi Instrument security factor according to IEC 60044-1 indirect
measurement method, calculated for nominal and operating
burden.
1
x
Kx Dimensioning factor (acc. to IEC 60044-1 class PX) at
accuracy limit with the selected load.
x
Ek Accuracy limiting voltage according to IEC 60044-1 for
class PX (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 r.m.s. current by 50%).
x
Ie Accuracy limiting current according to IEC 60044-1 class
PX (at E
k
).
x
E1 User-defined e.m.f. to verify the excitation current at this
e.m.f.
x
Ie1 Max. allowed excitation current at E
1
.
x
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