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ADSST-SALEM-3T
Rev. 0 | Page 18 of 24
ACCURACY OF REFERENCE DESIGN USING THE ADSST-SALEM-3T CHIPSET
Overall Accuracy, Power, and Energy Measurement
The accuracy figures are measured under typical specified conditions, unless otherwise indicated.
Table 10. Test Conditions for Reference Design Using a µ Metal CT of Class 0.5 Accuracy
Parameter Nominal Value
Nominal Voltage (Phase to Neutral) V
N
V
N
= 230 V ± 1%
Maximum Voltage (Phase to Neutral) 300 V
Nominal Current I
N
= 5 A
Maximum Current I
MAX
I
MAX
= 20 A
Frequency F
N
= 50 Hz/60 Hz ± 10%
Temperature 23 ± 2°C
Table 11. Maximum Error (Power and Energies)
Current Voltage PF Min Typ Max Unit
0.01 I
N
≤ I < 0.05 I
N
V
N
1.0
±0.1 ±0.2
%
0.05 I
N
≤ I < I
MAX
V
N
1.0
±0.1 ±0.2
%
0.02 I
N
≤ I< 0.1 I
N
V
N
0.5 Lagging
±0.15 ±0.35
%
0.8 Leading
±0.15 ±0.35
%
0.05 I
N
≤ I < I
MAX
V
N
0.5 Lagging
±0.1 ±0.2
%
0.8 Leading
±0.1 ±0.2
%
Table 12. Unbalanced Load Error
Current Voltage PF Min Typ Max Unit
0.05 I
N
≤ I ≤ I
MAX
V
N
1.0
±0.15 ±0.2
%
0.1 I
N
≤ I ≤ I
MAX
V
N
0.5 Lagging
±0.15 ±0.2
%
Table 13. Voltage Variation Error
Voltage Current PF Min Typ Max Unit
V
N
± 10% 0.05 I
N
≤ I ≤ I
MAX
1.0
±0.05 ±0.1
%
V
N
± 10% 0.1 I
N
≤ I ≤ I
MAX
0.5 Lagging
±0.05
±0.1
%
Table 14. Frequency Variation Errors
Frequency Current PF Min Typ Max Unit
f
N
± 10% 0.05 I
N
≤ I ≤ I
MAX
1.0
±0.05 ±0.1
%
f
N
± 10% 0.1 I
N
≤ I ≤ I
MAX
0.5 Lagging
±0.05 ±0.1
%
Table 15. Harmonic Distortion Error
Current Current Min Typ Max Unit
10% of 3
rd
Harmonic
0.05 I
N
≤ I ≤ I
MAX
±0.05 ±0.1
%
Table 16. Reverse Phase Sequence Error
Current Voltage Min Typ Max Unit
0.1 I
N
V
N
±0.05
%