Omicron Lab CT Analyzer User Manual page 112

CT Analyzer User Manual
110
Test results displayed in the Excitation card for IEC 60044-1
Param. Description
V-kn Knee point voltage (acc. to standard) of the
topmost knee point found.
I-kn Knee point current (acc. to standard) of the
topmost knee point found.
Ls Saturated inductance.
Lm Non-saturated inductance.
Ts Secondary time constant.
Kr Remanence factor.
ε Indirect error (acc. to standard).
i
ALF Accuracy limiting factor according to
IEC 60044-1 direct measurement method,
calculated for nominal and operating burden.
ALFi Accuracy limiting factor according to
IEC 60044-1 indirect measurement method,
calculated for nominal and operating burden.
FS Instrument security factor according to
IEC 60044-1 direct measurement method,
calculated for nominal and operating burden.
FSi Instrument security factor according to
IEC 60044-1 indirect measurement method,
calculated for nominal and operating burden.
Kx Dimensioning factor (acc. to IEC 60044-1 class
PX) at accuracy limit with the selected load.
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%).
Ie Accuracy limiting current according to
IEC 60044-1 class PX (at E
E1 User-defined e.m.f. to verify the excitation
current at this e.m.f.
Ie1 Max. allowed excitation current at E
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.
Results displayed for
protection CTs
xP
x
x
x
x
x
x
x
x
1
x
1
1
1
).
k
.
1
IEC 60044-1
metering
CTs
xPR PX
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