Omicron CT SB2 User Manual page 137

Table 8-32: Parameters assessed for IEC 61869-2 transient protection CTs
Param. Description
Class Accuracy class according to standard.
Δϕ
Phase deviation.
ε
Current ratio error.
Ktd * Kssc Transient dimensioning factor (K
symmetrical short-circuit current factor (K
Peak instantaneous error at voltage E
^
ε
Peak alternating error component according to the standard.
^
ε ac
Ts Secondary time constant.
Kr Remanence factor
Rct Secondary winding resistance.
Rprim Primary winding resistance.
Table 8-33: Parameters assessed for IEC 61869-2 metering CTs
Param. Description
Class Accuracy class according to standard.
Δϕ Phase deviation.
ε
Current ratio error.
FSi Instrument security factor (indirect meas. method).
Rprim Primary winding resistance.
OMICRON
Test cards for Advanced CT Test mode
) multiplied by the rated
td
).
ssc
.
max
Parameter assessed for
IEC 61869-2
transient protection CTs
TPX 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 x
Parameter assessed
for IEC 61869-2
metering CTs
0.1, 0.2, 0.2s, 3, 5
0.5, 0.5s, 1
x x
x
x x
x x
x x
135