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CT Analyzer User Manual
Parameters assessed for IEC 61869-2
Table 8-31: Parameters assessed for IEC 61869-2 protection CTs
Param. Description
Class
Accuracy class according to standard.
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.
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
1
Rct
Secondary winding resistance.
Rprim
Primary winding resistance.
134
.
Parameter assessed for IEC 61869-2
protection CTs
standard classes
5P 10P 5PR 10PR PX PXR 2P, 3P,
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
OMICRON
extension
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
OMICRON
x
x
x
x
x
x
x
x
x
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