User Manual

AT73C500
27
Starting Current
As default, the starting current is based on 5A basic current
and 80A full scale current range.
Temperature Coefficient
Measured with the internal reference voltage source of
AT73C501/AT73C502.
Other Parameters
The accuracy of the following parameters is measured in
the conditions below unless otherwise indicated in the
parameter field of the table. The measurement error has
been calculated based on values averaged over 1min
period.
The accuracy of Power Factor measurements was tested
with PF values 0.5, -0.5, -1 and 1.
Table 18. Starting Current
Voltage Min Typ Max Units
U
N
0.004 IB
Table 19. Mean Temperature Coefficient
Current Voltage
Power
Factor Min Typ Max Units
0.1I
B
...I
FS
U
N
1.000 0.02 0.04 %/K
0.1I
B
...I
FS
U
N
0.5
lagging
0.02 0.04 %/K
Parameter Nominal Value
Nominal voltage, U
N
230V, ±1%
Full-scale voltage, U
FS
270V
Full-scale current, I
FS
80A
Base current, I
B
5A
Frequency, f 50.0 Hz, ±0.3%
Power factor, PF 1
Harmonic contents of voltage 0%
Harmonic contents of current 0%
Temperature, T 23C, ±2°C
AT73C500 master clock 3.2768 MHz
Table 20. Apparent Power and Energy Error
Current Min Typ Max Units
0.05I
FS
...I
FS
-0.5 +0.5 %
0.005I
FS
...0.05I
FS
-2.0 +2.0 %
0.001I
FS
...0.005I
FS
-5.0 +5.0 %
Table 21. Power Factor Error
Current Min Typ Max Units
0.05I
FS
...I
FS
-0.5 +0.5 %
0.005I
FS
...0.05I
FS
-2.5 +2.5 %
Table 22. Phase Voltage Error
Voltage Min Typ Max Units
0.2U
FS
...U
FS
-0.5 +0.5 %
Table 23. Phase Current Error
Current Min Typ Max Units
0.05I
FS
...I
FS
-0.5 +0.5 %
0.005I
FS
...0.05I
FS
-2.5 +2.5 %
Table 24. Frequency Error
Frequency Min Typ Max Units
40 Hz...100 Hz -0.5 +0.5 %
Parameter Nominal Value