CT Analyzer User Manual
112
Test results displayed in the Excitation card for IEC 61869-2
Param. Description Results displayed for
IEC 61869-2
protection CTs, class
metering
CTs
xP
xPR
PX
PXR
TPX
TPY
TPZ
V-kn Knee point voltage according to standard. xxxxxxx x
I-kn Knee point current according to standard. xxxxxxx x
Ls Saturated inductance. xxxxxxx x
Lm Non-saturated inductance. xxxxxxx x
Ts Secondary time constant. xxxxxxx x
Kr Remanence factor. xxxxxxx x
ε
i
Indirect error (acc. to standard).
xx x
FS Instrument security factor according to
IEC
61869-2 direct measurement method,
calculated for nominal and operating burden.
1
x
FSi Instrument security factor according to
IEC
61869-2 indirect measurement method,
calculated for nominal and operating burden.
1
x
ALF Accuracy limiting factor according to
IEC
61869-2 direct measurement method,
calculated for nominal and operating burden.
1
xx
ALFi Accuracy limiting factor according to
IEC
61869-2 indirect measurement method,
calculated for nominal and operating burden.
1
xx
Kx Dimensioning factor (acc. to IEC
61869-2) at
accuracy limit with the selected load.
xx
Ek Accuracy limiting voltage according to
IEC
61869-2 (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%).
xx
Ie Accuracy limiting current according to
IEC
61869-2 (at E
k
).
xx
E1 User-defined e.m.f. to verify the excitation
current at this e.m.f.
xx
Ie1 Max. allowed excitation current at E
1
.
xx
Kssc Rated symmetrical short-circuit current factor
at accuracy limit with the selected load.
1, 2
xxx
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