Manual
Appendix A Technical Specifications
144
Series PM175 Powermeters
Measurement Specifications
Parameter
Full Scale @ Input
Range
Accuracy
Range
%
Reading
% FS
Conditions
Voltage
120VxPT @ 120V
400VxPT @ 690V
0.2
0.01
10% to 120% FS
0 to 1,150,000 V
Starting voltage
1.5% FS @ 120V
1.5% FS @ 690V
Line current
CT
0.2
0.02
1% - 200% FS
0 to 40,000 A
Starting current 0.1% FS
Active power
0.36PTCT @ 120V
1.2PTCT @ 690V
0.2
0.02
|PF| 0.5
1
-10,000,000 kW to
+10,000,000 kW
Reactive power
0.36PTCT @ 120V
1.2PTCT @ 690V
0.3
0.04
|PF| 0.9
1
-10,000,000 kvar to
+10,000,000 kvar
Apparent power
0.36PTCT @ 120V
1.2PTCT @ 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
40 Hz to 70 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
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. Voltage and Current measurement accuracy is 0.05 % at nominal value
3. Specifications assume: voltage and current waveforms with THD 5% for kvar,
kVA and PF, and reference operating temperature 20C - 26C.
4. Measurement error is typically less than the maximum error indicated.