31
Accuracy, %
Range
Display Resolution (%Rdg)
d
Parameter
Full Scale
Rdg FS Conditions
@
range
Apparent energy
according to power accuracy
e
0 to 999,999 MVAh 1 kVAh @
1 to 999999 kVAh
10
kVAh @ 1000 to 9,999 MVAh
100
kVAh @ 10 to 99.999 GVAh
1MVAh @ 100 to 999.9 GVAh
PT = external potential transformer ratio CT, CT PRIMARY CURRENT = primary current rating of external current transformer
FSU = full scale voltage FS
I
= full scale current U
1
= voltage fundamental
I
1
= current fundamental
c
@ 10% to 120% of voltage FS and 2% to 120% of current FS
d
Higher resolution is achievable via communications
e
Where the current is
>
10% FS, the energy accuracy is better than 1.5% Rdg.
Additional 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.
2. Specifications assume: voltage and current waveforms 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.
