User manual

6 Technical data
95
6.4.8 Harmonic Powers
Harmonic Powers
Conditions
Resolution
Basic uncertainty
(1)
Active and reactive
power of harmonics
80% U
nom
≤ U
RMS
< 150% U
nom
5% I
nom
≤ I
RMS
≤ I
nom
depending on
U
nom
and I
nom





 


 


%
where:

Uh
– basic measurement un-
certainty for voltage har-
monic amplitude,

Ih
– basic measurement un-
certainty for current har-
monic amplitude,

ph
– basic uncertainty of the
measurement of the phase
between voltage and current
harmonics.
(1) See chapter 6.4.10. Estimating measurement uncertainty values for power and energy.
6.4.9 Power and energy
Power and energy
Conditions
(for power and energy
80% U
nom
≤ U
RMS
< 120% U
nom
)
Resolution
Basic uncertainty
(1)
Active power
Active Energy
1% I
nom
≤ I
RMS
< 5% I
nom
cos = 1
depending on
U
nom
and I
nom




 


%
5% I
nom
≤ I
RMS
≤ I
nom
cos = 1




 


%
2% I
nom
≤ I
RMS
< 10% I
nom
cos = 0.5




 


%
10% I
nom
≤ I
RMS
≤ I
nom
cos = 0.5




 


%
Reactive power
Reactive energy
2% I
nom
≤ I
RMS
< 5% I
nom
sin = 1
depending on
U
nom
and I
nom




 


%
5% I
nom
≤ I
RMS
< I
nom
sin = 1




 


%
5% I
nom
≤ I
RMS
< 10% I
nom
sin = 0.5




 


%
10% I
nom
≤ I
RMS
< I
nom
sin = 0.5




 


%
10% I
nom
≤ I
RMS
< I
nom
sin = 0.25




 


%
Apparent power
Apparent energy
2% I
nom
≤ I
RMS
< 5% I
nom
depending on
U
nom
and I
nom
1%
5% I
nom
≤ I
RMS
≤ I
nom
0.5%
Power factor (PF)
0…1
50% U
nom
≤ U
RMS
< 150% U
nom
10% I
nom
≤ I
RMS
< I
nom
0.01
0.03
Displacement power
factor (cosφ/ DPF)
0…1
50% U
nom
≤ U
RMS
< 150% U
nom
10% I
nom
≤ I
RMS
< I
nom
0.01
0.03
(1) See chapter 6.4.10. Estimating measurement uncertainty values for power and energy.