2.4. Positional Accuracy
1. -500P: W Accuracy Better than 2% (PF=1; Input Current >50A; the “A” area).
-1000P: W Accuracy Better than 2% (PF=1; Input Current >50A; the “A” area).
-2000P: W Accuracy Better than 2% (PF=1; Input Current >50A; the “A” area).
-4000P: W Accuracy Better than 2% (PF=1; Input Current >50A; the “A” area).
2. Due to small variations in the winding density and coil cross-sectional area the
transducer output varies slightly depending on the position of the current within
the coil loop.
The diagram below shows the variation of accuracy throughout
the coil. The variation is greatest when the current is positioned
near the junction of the connecting cable and the coil, where
there is some discontinuity, and the error here can be typically
5%. Since in most applications the current is distributed
throughout a significant part of the area contained by the coil loop
the reading will be very close to the calibration value.
Type
A
B
C
D
Accuracy 2%
3%
5%
>5%
The current should not be positioned close to the
coil-cable junction (shown by the “D” area) since the
error for this region is greater.
