Assessed Parameters - Omicron Lab CT Analyzer User Manual

CT Analyzer User Manual
6.8.1

Assessed Parameters

126
Parameters assessed for IEC 60044-1
Param. Description
Class Accuracy class according to standard.
Rct Secondary winding resistance.
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.
ALF Accuracy limiting factor (direct
measurement method).
ALFi Accuracy limiting factor (indirect
measurement method).
Ek Rated knee point e.m.f.
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
Param. Description
Class Accuracy class according to standard.
Δϕ
Phase deviation.
ε
Current ratio error.
FS Instrument security factor (direct measurement method).
FSi Instrument security factor (indirect meas. method).
Parameter assessed for IEC 60044-1
protection CTs
standard classes
2P, 3P,
5P 10P 5PR 10PR PX 4P, 6P
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 x x x
x
x
x
x
Parameter assessed
for IEC 60044-1
metering CTs
0.1, 0.2, 0.2s,
0.5, 0.5s, 1
x
x
x
x
x
OMICRON
extension
2PR, 3PR,
4PR, 6PR
x x
x
x x
x x
x x
x
x
x x
x x
3, 5
x
x
x
x