Appendix: Technical Specifications 47
Key:
PT = external potential transformer ratio CT, CT Primary Current = primary current rating of external current transformer
FSU = voltage full scale
FSI = current full scale
@ 10% to 120% of voltage FS and 2% to 150% 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 a reference temperature of 20 - 26
°C.
3. Specifications for kvar, kVA and PF assume voltage and current waveforms with THD
≤ 5%
4. Ordinary measurement error is considerably less than the specified accuracy which indicates maximum error.
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