User guide

Appendix: Technical Specifications 69
Accuracy, % Range Display resolution (%Rdg) 
Parameter Full scale Rdg FS Conditions
@
range
Neutral (unbalanced)
current
CT PRIMARY CURRENT 0.5 2% to 120% FS 0 to 9999 A
0.01 A
@
0.01A to 99.99 A
≤0.1%
@
100.0 A to 9999 A
Starting current 0.5% FS
Ampere demand same as for current
KW demand (block & sliding) same as for kW
KVA demand (block & sliding ) same as for kVA
Total Harmonic
Distortion
THD U (I), % U
1
(I
1
)
999.9 1.5 0.2
≥ 0.1% FS,
U (
I) ≥ 10% FSU
(FS
I)
0 to 999.9 0.1
Total Demand
Distortion TDD (I), %
100 1.5
≥ 1% FS
I,
I ≥ 10% FSI
0 to 100 0.1
Active energy
Import & Export
same as for power 
0 to 99,999 MWh
1 kWh
@
1 to 99,999 kWh
10 kWh
@
100 to 999.99 MWh
100 kWh
@
1,000 to 9,999.9 MWh
1MWh
@
10,000 to 99,999 MWh
Reactive energy
Import & Export
same as for power 
0 to 99,999 Mvarh
1 kvarh
@
1 to 99,999 kvarh
10 kvarh
@
100 to 999.99 Mvarh
100 kvarh
@
1,000 to 9,999.9 Mvarh
1Mvarh
@
10,000 to 99,999 Mvarh
Apparent energy same as for power 
0 to 99,999 MVAh
1 kVAh
@
1 to 99,999 kVAh
10 kVAh
@
100 to 999.99 MVAh
100 kVAh
@
1,000 to 9,999.9 MVAh
1MVAh
@
10,000 to 99,999 MVAh
PT = external potential transformer ratio CT, CT Primary Current = primary current rating of external current transformer
FSU = voltage full scale
FS
I = current full scale
U
1
= voltage fundamental
I
1
= current fundamental
 @ 10% to 120% of voltage FS and 2% to 120% of current FS  Higher resolution is achievable via communications
 Where the current is > 10% FS, the energy accuracy is better than 1.5% Rdg.
Additional 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.
2. Specifications assume: voltage and current wave forms with THD ≤ 5% for kvar, kVA and PF; reference operating temperature: 20 - 26°C.
3. Ordinary measurement error is considerably less than the specified accuracy which indicates maximum error.