Measurement Specifications - Satec expertmeter EM720 Installation Manual

Measurement Specifications

Full Scale @ Input
Parameter
Range
Voltage V1-V3 230 x PT ratio @
(L-n) 230V
Voltage V4 230 x PT ratio @
(calculated) 230V
Voltage V1-V3
69 x PT ratio
(L-n)
Voltage V4
69 x PT ratio
(calculated)
Line current I1- I4 CT primary
current
Fault current I1- CT primary
I4 current
Active power
3xV FS×CT/1000
Reactive power
3xV FS×CT/1000
Apparent power
3xV FS×CT/1000
Power factor
1.000
Frequency
50 Hz
60 Hz
Total Harmonic
999.9
Distortion, THD
V (I), %V f (%I f )
Total Demand
100
Distortion, TDD,
%
Active energy
Import & Export
Reactive energy
Import & Export
Apparent energy
Symmetrical Voltage FS
components
Current FS
Current FS
Phasor angles
*
@ 80% to 120% of voltage FS, 2% to 200% of current FS, and frequency 50/60 Hz
PT - external potential transformer ratio
CT - primary current rating of external current transformer
FSV - voltage full scale
FSI - current full scale
V f - fundamental voltage
I f - fundamental current
NOTES
1. Accuracy is expressed as ± (percentage of reading + percentage of full scale) ± 1 digit. This does not include inaccuracies
introduced by the user's potential and current transformers. Accuracy calculated at 1second average.
2. Specifications assume: voltage and current waveforms with THD ≤ 5% for kvar, kVA and PF, and reference operating
temperature 20°C - 26°C.
3. Measurement error is typically less than the maximum error indicated
28
Accuracy
% Reading % FS
0.05 ±0.05
1% up to 140%
±0.5
5% up to 140%
0.1 ±0.05
1% up to 140%
±0.5
5% up to 140%
±0.06 ±0.06 1% up to 120% In
±0.5 - 120%- 1000% In
0.2 0.02 |PF| ≥ 0.5 *
0.3 0.04 |PF| ≤ 0.9 *
0.2 0.02 |PF| ≥ 0.5 *
0.2 |PF| ≥ 0.5, I ≥ 2%
FSI
- ±0.02 40-65 Hz
- ±0.02 45- 70 Hz
THD ≥ 1%,
1.5 0.1
V (I) ≥ 10% FSV (FSI)
TDD ≥ 1%,
1.5
I ≥ 10% FSI
IEC 62053-22 Class 0.2S
Class 0.5S under conditions as per IEC
62053-22:2003 @ 0≤ |PF| ≤ 0.9
Class 0.2S under conditions as per IEC
62053-22:2003
1.0 10% - 120% FS
1.0 10% - 200% FS
3.0
200% - 3000%FS
1 degree
Range
Conditions
0 up to 999,000 V
0 up to 999,000 V
0 up to 20,000 A
0 up to 100,000 A
-10,000,000 kW to
+10,000,000 kW
-10,000,000 kvar to
+10,000,000 kvar
0 to 10,000,000 kVA
-0.999 to +1.000
40.00 up to 64.99 Hz
45.00 up to 69.99 Hz
0 to 999.9
0 to 100
0 to 999,999.999 MWh
0 to 999,999.999 Mvarh
0 to 999,999.999 MVAh
Appendix: Technical Specifications