Omicron Lab CT Analyzer User Manual page 167

Values without the prefix "!" in the ratio table of the Ratio card have guaranteed
accuracy. The accuracy of values marked with a "!" in the table is reduced by
factor 2 since these values are not directly measured but calculated from the
measured values instead.
Ratio measurement accuracy for 1 A CTs at rated current
CT ratio I
sn
0.2 - 1 1
> 1 - 2000 1
> 2000 - 5000 1
> 5000 - 10000 1
1. Nominal burden of the CT.
Ratio measurement accuracy for 5 A CTs at rated current
CT ratio I
sn
0.2 - 1 5
> 1 - 2000 5
> 2000 - 5000 5
> 5000 - 10000 5
1. Nominal burden of the CT.
Phase measurement accuracy at rated current
Resolution
ϕ
Accuracy (cos 0.8 - 1)
Turns ratio measurement accuracy
Resolution
Accuracy
1
Rated power Typical
accuracy
1.0 - 30VA 0.05%
0 - 30VA 0.02%
0 - 30VA 0.03%
0 - 30VA 0.05%
1
Rated power Typical
accuracy
1.0 - 75VA 0.05%
0 - 75VA 0.02%
0 - 75VA 0.03%
0 - 75VA 0.05%
0.01min
1min (typical)
3min (guaranteed)
0.01 turns
0.05% (typical)
0.1% (guaranteed)
Technical Data
Guaranteed
accuracy
0.1%
0.05%
0.1%
0.2%
Guaranteed
accuracy
0.1%
0.05%
0.1%
0.2%
165