Omicron Lab CT Analyzer User Manual page 129

Parameters assessed for IEC 60044-6
Parameter Description
Class Accuracy class according to standard.
Rct DC winding resistance.
Δϕ
Phase deviation.
ε
Current ratio error.
εt
Turns ratio error (included in class).
Peak instantaneous error at voltage E
^
ε
Tp Primary time constant.
Ts Secondary time constant.
Kr Remanence factor.
Ktd * Kssc Transient dimensioning factor (K
the rated symmetrical short-circuit current factor
(K ).
ssc
K * Kssc Dimensioning factor (K) multiplied by the rated
symmetrical short-circuit current factor (K
V-al Rated equivalent excitation limiting secondary
voltage.
I-al Accuracy limiting secondary excitation current.
The CT Analyzer Test Cards
Parameter assessed for
IEC 60044-6
TPS TPX
x
x
x
.
max
x
) multiplied by
td
x
).
ssc
x
x
TPY TPZ
x x x
x x x
x x x
x x x
x x
x x x
x x
x
x x x
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