
Page 20
Averaging times
A mean value is calculated for the most at the
current and power values. A common averag-
ing time for the current measured values L1,
L2, L3 and N , as well as one for power meas-
ured values, real power, apparent power and re-
active power is programmable.
Presettings:
Averaging time of currents = 900 seconds
Averaging time of power = 900 seconds
The following averaging times are selectable:
5, 10, 30, 60, 300, 480, 900 seconds
Programming of averaging time
Averaging time for real power
In programming mode please scroll to the av-
eraging time for power with key 2. Confirm se-
lection by pressing key 1.
The averaging time flashes and can be
changed by pressing key 2. Confirm changed
averaging time with key 1.
The averaging time stops flashing. The averag-
ing time for power has been programmed.
By using key 2 you can now shift to program-
ming menu „
Averaging time for current“
.
Averaging time for Currents
In programming menu please scroll to the av-
eraging time for currents. Confirm selection by
pressing key 1.
The averaging time flashes and can be
changed by pressing key 2. Confirm changed
averaging time with key 1. The averaging time
stops flashing. The averaging time for currents
has been programmed. By using key 2 you can
now shift to programming menu „
Rotation time“
.
Example for the averaging time of current mean
value, here 30 seconds.
Example for the averaging time of real power
mean value, here 900 seconds.
Method of taking the mean
The used exponential method reaches at least
95% of the measured value after the set aver-
aging time.
ME
n
= ME
n-1
+ (MA-ME
n-1
) / N
ME
n
= indicated mean value
MA
= measured value
n
= consecutive digit
N
= digit of measured values, of witch
mean values shall be built.
L1
L2
L3
S
PRG
W
PRG
MkWh
MkVArh
L1
L2
L3
S
PRG
A