Table 3-7. Phase B Active Energy % Error Versus
Voltage, Two-Voltage Mode
VOLTAGE (V)
% ERROR
240
0.011
120
–0.0003
60
–0.004
30
–0.0047
15
–0.0067
Table 3-8. Phase B Active Energy % Error Versus Current, Two-Voltage Mode
CURRENT (A)
0°
60°
–60°
0.05
–0.032
–0.007
–0.122
0.10
–0.019
0.019
–0.083
0.25
–0.019
0.032
–0.058
0.50
–0.007
0.045
–0.062
1.00
–0.007
0.045
–0.045
2.00
–0.015
0.032
–0.06
5.00
–0.007
0.026
–0.036
10.00
–0.0087
0.009
–0.025
20.00
–0.019
–0.019
–0.028
30.00
–0.019
–0.036
–0.011
40.00
-0.023
–0.045
0
50.00
–0.014
–0.06
0.0395
60.00
–0.011
–0.075
0.045
70.00
–0.01
–0.074
0.054
80.00.
–0.0077
–0.08
0.064
90.00
0.003
–0.068
0.066
100.00
0.011
–0.042
0.052
Current (A)
Ac
ti
ve
En
ergy
Error
(%
)
0
10
20
30
40
50
60
70
80
90
100
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
D002
0°
60°
-60°
Figure 3-18. Phase B Active Energy % Error Versus Current, Two-Voltage Mode
Hardware, Software, Testing Requirements, and Test Results
48
High-Accuracy Split-Phase CT Electricity Meter Reference Design Using
Standalone ADCs
TIDUEM8B – MARCH 2019 – REVISED FEBRUARY 2021
Copyright © 2021 Texas Instruments Incorporated