Accuracy
Voltage
0.4% of reading ±0.1% of range
Current
0.4% of reading ±0.1% of range
Neutral current
4% of range
Frequency
0.15% of mid frequency
Power factor
1% of Unity
Active power (W)
0.9% of reading ±0.1% of range
Reactive power (VAr)
1.9% of reading ±0.1% of range
Apparent power (VA)
0.9% of reading ±0.1% of range
Active energy (W.h)
1% (IEC 1036) CI
Active P.F. 0.8.. 1 ..0.8 importing
Reactive energy (VAr.h)
1% (IEC 1036)
Reactive P.F. 0.8.. 1 ..0.8 importing
Total Harmonic Distortion
1%
Temperature coefficient
0.013%/°C typical
Response time to step input
500 milliseconds approx.
Error change due to variation of an
2 * Error allowed for the reference
influence quantity in the manner
condition applied in the test.
described in section 6 of IEC688:1992
Error in measurement when a measurand
2 * Error allowed at the end of the
is within its measuring range, but outside
reference range adjacent to the section
its reference range.
of the measuring range where the
measurand is currently operating
/ being tested.
Reference conditions of measurands and, where applicable, components of the measurand
Values of measured quantities, and of components of measured quantities, where the above
errors for the measured quantities apply.
Voltage
50 .. 100% of nominal
60 .. 100% of nominal for THD
Current
10 .. 100% of nominal
20 .. 100% of nominal for THD
Frequency
Nominal ±10%
Active power (Watt)
10 .. 100% of nominal
Voltage
Nominal ±2%
Current
10 .. 100% of nominal
Active power factor
1 .. 0.8 leading or lagging
Reactive power (VAr)
10 .. 100% of nominal
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