PQM-700 Operating Manual
70
7.3.8 Flicker
Flicker
Ranges and conditions
Resolution
Basic uncertainty
P
st
(10 min),
P
lt
(2 h)
0.4 ... 10
for U
RMS
≥ 80% U
nom
0.01
10% within the values presented in
tables of IEC 61000-4-15 standard
7.3.9 Unbalance
Unbalance
(voltage and current)
Ranges and conditions
Resolution
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%
0.3%
(absolute uncertainty)
7.4
Event detection - voltage and current RMS
U
RMS
voltage
(dips, interruptions and
swells)
Range
Resolution
Basic uncertainty
U
RMS(1/2)
0.0%...120.0% U
nom
0.01% U
nom
1% U
nom
Detection thresholds
Set by the user in percentage or absolute values. Event detection based
on the measurement of U
RMS(1/2)
(1-
period RMS refreshed every ½ pe-
riod).
Duration
hh:mm:ss.ms
½ period
One period
Waveform record
Two periods before event + 4 periods after the event (total of 6 cycles)
204.8/170.67 (50 Hz/60 Hz) samples per period
I
RMS
current
(min, max)
Range
Resolution
Basic uncertainty
I
RMS(1/2)
0.0%...100.0% I
nom
0.01% I
nom
1% I
nom
Detection thresholds
Set by the user in percentage or absolute values. Event detection based
on the measurement of I
RMS(1/2)
(1-
period RMS refreshed every ½ period).
Duration
hh:mm:ss.ms
½ period
One period
Waveform record
Two periods before event + 4 periods after the event (total of 6 cycles)
204.8/170.67 (50 Hz/60 Hz) samples per period
7.5
Event detection - other parameters
Parameter
Range
Detection method
Frequency
(min, max)
40 ... 70 Hz (percent-
age or absolute value)
Detection based on 10-sec. measurement
(acc. to IEC 61000-4-30)
Voltage crest factor
(min, max)
1.0 ... 10.0
Basing on 10/12-period value
Current crest factor
(min, max)
1.0 ... 10.0
Basing on 10/12-period value
Negative sequence unbalance fac-
tor for voltage (max)
0.0 ... 20.0%
Basing on 10/12-period value
Negative sequence unbalance fac-
tor for current (max)
0.0 ... 20.0%
Basing on 10/12-period value
Short-term flicker P
st
(max)
0..20
Basing on 10-minute value
Long-term flicker P
lt
(max)
0..20
Basing on 2-hour value
Active power P (min, max)
Depending on the con-
figuration
Basing on 10/12-period value
(for consumed and supplied power)
Reactive power Q (min, max)
Depending on the con-
figuration
Basing on 10/12-period value
(for consumed and supplied power)
Apparent power S (min, max)
Depending on the con-
figuration
Basing on 10/12-period value
Summary of Contents for PQM-700
Page 85: ...85 Notes...
