Sonel MPI-540 - Measuring Harmonics; Unbalance; Power and Energy Measurement

MPI-540 – USER MANUAL
182
10.2.6 Measuring harmonics
Harmonics
Range and condi-
tions
Resolution
Basic uncertainty
Harmonic (n)
DC, 1..40, grouping: harmonics sub-groups according to EN 61000-4-7
U
RMS
amplitude
0..200% U
nom
0.01% U
nom
0,15% U
nom
if m.v.<3% U
nom
5% m.v. if m.v.≥ 3% U
nom
(according to EN 61000-4-7
Class II)
I
RMS
amplitude
Depending clamps
used (see specifica-
tions for I
RMS
)
0.01% I
nom
0,5% I
nom
if m.v.<10% I
nom
5% m.v. if m.v.≥ 10% I
nom
(according to EN 61000-4-7
Class II)
Voltage THD-F
(n = 2..40)
0.0…100.0%
for U
RMS
≥ 1% U
nom
0.1%
5%
current THD-F
(n = 2..40)
0.0…100.0%
for I
RMS
≥ 1% I
nom
0.1%
5%
10.2.7 Unbalance
Unbalance
(voltage and current)
Range and conditions
Resolu-
tion
Basic uncertainty
Unbalance factor for positive,
negative and zero sequence
0.0% ... 10.0%
for
80% U
nom
≤ U
RMS
< 150% U
nom
0.1%
0.15%
(absolute uncer-
tainty)
10.2.8 Power and energy measurement
Power and energy
Conditions
(for power and energy
80% U
nom
≤ U
RMS
< 120% U
nom
)
Resolu-
tion
Basic uncertainty
(1)
Active power
Active Energy
2% I
nom
≤ I
RMS
< 5% I
nom
cos = 1
depending
on
U
nom
and
I
nom
%5,2
22
ph
 
5% I
nom
≤ I
RMS
≤ I
nom
cos = 1
%0,2
22
ph
 
5% I
nom
≤ I
RMS
< 10% I
nom
cos = 0.5
%5,2
22
ph
 
10% I
nom
≤ I
RMS
≤ I
nom
cos = 0.5
%0,2
22
ph
 
Reactive power
Reactive energy
2% I
nom
≤ I
RMS
< 5% I
nom
sin = 1
depending
on
U
nom
and
I
nom
%0,4
22
ph
 
5% I
nom
≤ I
RMS
< I
nom
sin = 1
%0,3
22
ph
 
5% I
nom
≤ I
RMS
< 10% I
nom
sin = 0.5
%0,4
22
ph
 
10% I
nom
≤ I
RMS
< I
nom
sin = 0.5
%0,3
22
ph
 
10% I
nom
≤ I
RMS
< I
nom
sin = 0.25
%0,4
22
ph
 
Apparent power
Apparent energy
2% I
nom
≤ I
RMS
< 5% I
nom
depending
on
U
nom
and
I
nom
2.5%
5% I
nom
≤ I
RMS
≤ I
nom
2.0%
Power factor (PF)
0…1
50% U
nom
≤ U
RMS
< 150% U
nom
10% I
nom
≤ I
RMS
< I
nom
0.01
0.03