Omicron Lab CT SB2 - Page 167

165
Technical Data
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
Rated power
1
1. Nominal burden of the CT.
Typical
accuracy
Guaranteed
accuracy
0.2 - 1 1 1.0 - 30VA 0.05% 0.1%
> 1 - 2000 1 0 - 30VA 0.02% 0.05%
> 2000 - 5000 1 0 - 30VA 0.03% 0.1%
> 5000 - 10000 1 0 - 30VA 0.05% 0.2%
Ratio measurement accuracy for 5 A CTs at rated current
CT ratio I
sn
Rated power
1
1. Nominal burden of the CT.
Typical
accuracy
Guaranteed
accuracy
0.2 - 1 5 1.0 - 75VA 0.05% 0.1%
> 1 - 2000 5 0 - 75VA 0.02% 0.05%
> 2000 - 5000 5 0 - 75VA 0.03% 0.1%
> 5000 - 10000 5 0 - 75VA 0.05% 0.2%
Phase measurement accuracy at rated current
Resolution 0.01min
Accuracy (cos
ϕ 0.8 - 1)
1min (typical)
3min (guaranteed)
Turns ratio measurement accuracy
Resolution 0.01 turns
Accuracy 0.05% (typical)
0.1% (guaranteed)