Omicron Lab CT SB2 - Assessed Parameters

CT Analyzer User Manual
126
6.8.1 Assessed Parameters
Parameters assessed for IEC 60044-1
Param. Description Parameter assessed for IEC 60044-1
protection CTs
standard classes OMICRON
extension
5P 10P 5PR 10PR PX
2P, 3P,
4P, 6P
2PR, 3PR,
4PR, 6PR
Class Accuracy class according to standard. x x x x x x x
Rct Secondary winding resistance. x x x x
Δϕ Phase deviation. x x x x
ε Current ratio error. x x x x x x
ε
c
Composite error.
xx x x x x
εt Turns ratio error (incl. in class). x
Kr Remanence factor x x x
Ts Secondary time constant. x x x
ALF Accuracy limiting factor (direct
measurement method).
xx x x x x
ALFi Accuracy limiting factor (indirect
measurement method).
xx x x x x
Ek Rated knee point e.m.f. x
Kx Dimensioning factor (according to
IEC 60044-1 class PX).
x
Ie Accuracy limiting secondary excitation
current.
x
Ie1 Max. allowed secondary excitation
current at E
1
.
x
Param. Description Parameter assessed
for IEC 60044-1
metering CTs
0.1, 0.2, 0.2s,
0.5, 0.5s, 1
3, 5
Class Accuracy class according to standard. x x
Δϕ Phase deviation. x
ε Current ratio error. x x
FS Instrument security factor (direct measurement method). x x
FSi Instrument security factor (indirect meas. method). x x