12-6
IM 760301-01E
Item
Specifications
•
All accuracy figures for 0.1 to 10 Hz are reference values.
•
The voltage accuracy figures for 30 kHz to 100 kHz when the voltage exceeds 750 V are
reference values.
•
The voltage accuracy figures for 100 kHz to 1 MHz when the voltage (V) exceeds 2.2
×
10
4
/ f
(kHz) are reference values.
•
The current accuracy figures for DC, 10 Hz to 45 Hz, and 400 Hz to 200 kHz when the current
exceeds 20 A are reference values.
•
The current accuracy figures for 200 kHz to 500 kHz when the current exceeds 10 A are
reference values.
•
The current accuracy figures for 500 kHz to 1 MHz when the current exceeds 5 A are reference
values.
Effective input range
0 to
±
130%* of the measurement range for Udc and Idc.
1 to 130%* of the measurement range for Urms and Irms. (2% to 130%* if the crest factor is set to 6)
10 to
±
130%* of the measurement range for Umn and Imn.
10 to
±
130%* of the measurement range for Urmn and Irmn.
However, if the data update interval is 50 ms, 100 ms, 5 s, 10 s, or 20 s, the signal level of the
synchronization source must satisfy the input signal level of frequency measurement (see section 12.5).
*
110% for the maximum range of direct voltage and current inputs. The accuracy for 110% to
130% of the measurement range is reading error
×
1.5.
Maximum display
140% of the rated voltage or current range
Minimum display
Down to 0.3% of the measurement range for Urms and Irms (0.6% if the crest factor is set to 6).
Down to 1% of the measurement range for Umn, Urmn, Imn, and Irmn (2% if the crest factor is set to 6).
Values less than or equal to these figures are fixed to zero (suppressed to zero). The integrated
current q is dependent on the current value.
Lower limit of
Data update interval
50 ms 100 ms 250 ms 500 ms 1 s
2 s
5 s
10 s
20 s
measurement frequency
Lower limit of
45 Hz
25 Hz
20 Hz
10 Hz
5 Hz
2 Hz 0.5 Hz 0.2 Hz 0.1 Hz
measurement frequency
Line filter influence
When the cut-off frequency is 500 Hz
45 Hz
≤
f
≤
66 Hz: Add 0.2% of reading. f < 45 Hz: Add 0.5% of reading.
When the cut-off frequency is 5.5 kHz
f
≤
66 Hz: Add 0.2% of reading. 66 Hz < f
≤
500 Hz: Add 0.5% of reading.
When the cut-off frequency is 50 kHz
f
≤
500 Hz: Add 0.2% of reading. 500 Hz < f
≤
5 kHz: Add 0.5% of reading.
Conditions for detecting
Lead and lag are detected correctly when the voltage and current signals are both sine waves, the
lead and lag
amplitude is greater than or equal to 50% (greater than or equal to 100% if the crest factor is set to
6) of the measurement range, the frequency is between 20 Hz and 10 kHz, and the phase
difference is between
±
5
°
and 175
°
.
Temperature coefficient
Add
±
0.02% of reading/
°
C in the range 5 to 18
°
C or 28 to 40
°
C.
One year accuracy
Add (reading error of accuracy at 6 months
×
0.5) to the accuracy at 6 months.
Accuracy when the crest
Same as the accuracy when the crest factor is 3 after doubling the measurement range.
factor is set to 6
12.4 Accuracy