7 Operation
Maschinenfabrik Reinhausen GmbH 2021
77
8209941/00 EN
ECOTAP
®
VPD
®
III 30D-24 / MD&C
7.4.1.2 Bandwidth B1 (P2.1)
You can use this parameter to set the maximum permissible deviation in
measured voltage U
actual
from the desired value U
desired
. The following section
describes how you determine and set the bandwidth.
Determining bandwidth
In order to set the correct value, the transformer step voltage and nominal
voltage must be known. Note that a large bandwidth will result in a large
control deviation.
The bandwidth must always be greater than the following value:
Figure 51: Calculation of minimum bandwidth
U
n-1
Step voltage of tap position n-1
U
n
Step voltage of tap position n
U
nom
Nominal voltage
The following transformer values are used to determine the minimum band-
width:
Nominal voltage U
nom
= 400 V
Step voltage in tap position 4 U
Pos.4
= 390 V
Step voltage in tap position 5 U
Pos.5
= 400 V
Setting bandwidth B1 (P2.1)
To set the bandwidth, proceed as follows:
ü
The AVR MANUAL operating mode is active.
1. Press
>
until the desired parameter is displayed.
ð
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