Cirrus Logic AN362 - Manual (Page 14)

AN362
14 AN362REV1
5.2Accuracy Results for I
RMS
Load Current Performance
Figure 13. I
RMS
Load Current Performance
6. Summary
The CS5480 supports three current sensors: Rogowski coil, current transformer, and shunt. It achieves 0.1% accu-
racy over 4000:1 dynamic range at PF = 1 for active energy and sin
ϕ = 1 for reactive energy. The active and reactive
energy load performance exceeds IEC 62053-22 class 0,2S specifications and IEC 62053-23 class 2 specifications,
respectively. The CS5480 is the best-in-class analog front-end device for high-accuracy electricity meters with ex-
tensive load range: I
max
/ I
b
≥
40.
Load Current (A)
Current Dynamic
Range (x:1)
I
RMS
Register Value
(10-Second Average) I
RMS
Error
100 1 0.599839375 -0.03%
10 10 0.059990012 -0.02%
1 100 0.00599035 -0.02%
0.2 500 0.001199412 -0.05%
0.1 1000 0.000599265 -0.12%
Table 9. I
RMS
Load Current Performance
-0.30
-0.20
-0.10
0.00
0.10
0.20
0.30
0.1 1 10 100
Percent Error (%
)
Load Current (A)
Note: CS5480, where U
n
= 240 V, I
b(max)
= 2.5 (100 A) at 50 Hz