Omicron CT SB2 User Manual page 134

CT Analyzer User Manual
Table 8-28: Parameters assessed for IEC 60044-1 protection CTs (continued)
Param. Description
Kx Dimensioning factor (according to
IEC 60044-1 class PX).
Ie Accuracy limiting secondary excitation
current.
Ie1 Max. allowed secondary excitation current
at E .
1
Rct Secondary winding resistance.
Rprim Primary winding resistance.
Table 8-29: Parameters assessed for IEC 60044-1 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.
132
Parameter assessed for IEC 60044-1
protection CTs
standard classes
5P 10P 5PR 10PR PX 2P, 3P,
x x
x x x x
OMICRON
extension
2PR, 3PR,
4P, 6P 4PR, 6PR
x
x
x
x x
x x x
Parameter assessed
for IEC 60044-1
metering CTs
0.1, 0.2, 0.2s, 3, 5
0.5, 0.5s, 1
x x
x
x x
x x
x x
OMICRON