Wimotec Ltd
Measuring and monitoring unit
Technical description
WIMO 6CP10
WM6CP10.EN001
Wimotec 24h support phone +358 (0)20 753 3264
11
Parameter Value Unit Description
Total
s
Total (summed) time of
voltage sags during the
current observation period
Recorded
values
Prev
s
Total (summed) time of
voltage sags during the
previous observation period
2.3.5.
Voltage sags and swells
The power quality of electrical networks has become
increasingly important. The sophisticated loads (e.g. computers
etc.) require uninterruptible supply of “clean” electricity. One of
the most important power quality functions are sag monitoring
and swell monitoring.
The voltage log is trigged, if any voltage input either decreases
under the sag limit (U<) or increases over the swell limit (U>).
There are four registers for both sags and swells in the fault
log. Each register will have start time, type (which phases),
duration, minimum, average, maximum voltage values of each
sag and swell event. Furthermore, there are total number of
sags and swells counters as well as total timers for sags and
swells.
The voltage power quality functions are located under the
submenu “U”.
Setting parameters of sags and swells monitoring:
Parameter Value
Unit Default Description
U>
20 … 150
%
110
Setting value of swell limit
U<
10 … 120
%
90
Setting value of sag limit
Delay
0.04 … 1.00
S
0.06
Delay for sag and swell
detection
SagOn
On; Off
-
On
Sag on event
SagOff
On; Off
-
On
Sag off event
SwelOn
On; Off
-
On
Swell on event
SwelOf
On; Off
-
On
Swell off event
Recorded values of sags and swells monitoring:
Parameter Value Unit Description
Count
-
Cumulative sag counter
Total
-
Cumulative sag time counter
Count
-
Cumulative
swell
counter
Total
-
Cumulative swell time counter
Sag/swell
logs
1…4
Date
-
Date of the sag/swell
Time
-
Time stamp of the sag/swell
Recorded
values
Type
-
Voltage inputs that had the
sag/swell
