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Appendix A Technical Specifications
Series PM172 Powermeters
121
Measurement Specifications
Accuracy
Parameter
Full Scale @ Input
Range
%
Reading
% FS
Conditions
Range
Voltage
120VxPT @ 120V
400VxPT @ 690V
0.2
0.01
10% to 120% FS 0 to 1,150,000 V
Starting voltage 1.5% FS
Line current
CT
0.2
0.02
1% to 200% FS
0 to 40,000 A
Starting current 0.1% FS
Active power
0.36
×
PT
×
CT @ 120V
1.2
×
PT
×
CT @ 690V
0.2 0.02
|PF|
≥
0.5
1
-10,000,000 kW to
+10,000,000 kW
Reactive power
0.36
×
PT
×
CT @ 120V
1.2
×
PT
×
CT @ 690V
0.3 0.04
|PF|
≤
0.9
1
-10,000,000 kvar to
+10,000,000 kvar
Apparent power 0.36
×
PT
×
CT @ 120V
1.2
×
PT
×
CT @ 690V
0.2 0.02
|PF|
≥
0.5
1
0 to 10,000,000 kVA
Power factor
1.000
0.2
|PF|
≥
0.5,
I
≥
2% FSI
-0.999 to +1.000
Frequency
0.02
15 Hz to 480 Hz
Total Harmonic
Distortion, THD
V (I), %Vf (%If)
999.9 1.5
0.1
THD
≥
1%,
V (I)
≥
10% FSV
(FSI)
0 to 999.9
Total Demand
Distortion, TDD,
%
100
1.5
TDD
≥
1%,
I
≥
10% FSI
0 to 100
Active energy
Import & Export
Class 0.2S under conditions as per IEC
62053-22:2003
0 to 999,999.999 MWh
Reactive energy
Import & Export
Class 0.2S under conditions as per IEC
62053-22:2003, |PF|
≤
0.9
0 to 999,999.999 Mvarh
Apparent energy
Class 0.2S under conditions as per IEC
62053-22:2003
0 to 999,999.999 MVAh
1
@ 80% to 120% of voltage FS, 1% 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
Vf - fundamental voltage
If - fundamental current
NOTES
1. Accuracy is expressed as
±
(percentage of r 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.