Omicron Lab CT Analyzer User Manual page 130

CT Analyzer User Manual
128
Parameters assessed for IEC 61869-2
Param. Description
Class Accuracy class according to
standard.
Rct Secondary winding resistance.
Δϕ
Phase deviation.
ε
Current ratio error.
ε
Composite error.
c
εt
Turns ratio error (incl. in class).
Kr Remanence factor
Ts Secondary time constant.
ALF Accuracy limiting factor (direct
measurement method).
ALFi Accuracy limiting factor (indirect
measurement method).
Ek Rated knee point e.m.f.
Kx Dimensioning factor (according
to IEC 61869-2).
Ie Accuracy limiting secondary
excitation current.
Ie1 Max. allowed secondary
excitation current at E
Param. Description
Class Accuracy class according to standard.
Rct Secondary winding resistance.
Δϕ
Phase deviation.
ε
Current ratio error.
Ktd * Kssc Transient dimensioning factor (K
rated symmetrical short-circuit current factor (K
Peak instantaneous error at voltage E
^
ε
Ts Secondary time constant.
Kr Remanence factor
Parameter assessed for IEC 61869-2
standard classes
5P 10P 5PR 10PR PX PXR
x x x
x
x x
x x x
x x x
x
x
x x x
x x x
.
1
) multiplied by the
td
.
max
protection CTs
OMICRON
extension
2P, 3P, 2PR, 3PR,
4P, 6P 4PR, 6PR
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
Parameter assessed for
IEC 61869-2
transient protection CTs
TPX TPY
x x
x x
x x
x x
x x
).
ssc
x x
x
x
x
x
x
x
x
x
x
x
x
TPZ
x
x
x
x
x